diff --git a/.circleci/config.yml b/.circleci/config.yml
index d4e59be19..ce2922ba3 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -7,11 +7,11 @@ references:
 
   container_config: &container_config
     docker:
-      - image: circleci/android:api-28-alpha
+      - image: circleci/android@sha256:5cdc8626cc6f13efe5ed982cdcdb432b0472f8740fed8743a6461e025ad6cdfc
     working_directory: *workspace_root
     environment:
       environment:
-        JVM_OPTS: -Xmx3200m
+        _JAVA_OPTS: -Xmx3072m
 
   attach_workspace: &attach_workspace
     attach_workspace:
@@ -35,7 +35,7 @@ jobs:
           command: ./gradlew dependencies --no-daemon --stacktrace --console=plain -PdisablePreDex || true
       - run:
           name: Initial build
-          command: ./gradlew build -x test -x lint -x fabricGenerateResourcesRelease -x packageRelease --no-daemon --stacktrace --console=plain -PdisablePreDex
+          command: ./gradlew build -x test -x lint -x fabricGenerateResourcesFdroidRelease -x fabricGenerateResourcesPlayRelease -x packageRelease --no-daemon --stacktrace --console=plain -PdisablePreDex
       - run:
           name: Run FOSSA
           command: fossa --no-ansi || true
@@ -56,7 +56,7 @@ jobs:
           <<: *general_cache_key
       - run:
           name: Run lint
-          command: ./gradlew lint -x fabricGenerateResourcesRelease --no-daemon --stacktrace --console=plain -PdisablePreDex
+          command: ./gradlew lint -x fabricGenerateResourcesFdroidRelease -x fabricGenerateResourcesPlayRelease --no-daemon --stacktrace --console=plain -PdisablePreDex
       - store_artifacts:
           path: ./app/build/reports/
           destination: lint_reports/app/
@@ -75,7 +75,7 @@ jobs:
           <<: *general_cache_key
       - run:
           name: Run app tests
-          command: ./gradlew :app:test :app:jacocoTestReport -x fabricGenerateResourcesRelease --no-daemon --stacktrace --console=plain -PdisablePreDex
+          command: ./gradlew :app:test :app:jacocoTestReport -x fabricGenerateResourcesFdroidRelease -x fabricGenerateResourcesPlayRelease --no-daemon --stacktrace --console=plain -PdisablePreDex
       - run:
           name: Upload unit code coverage to codecov
           command: bash <(curl -s https://codecov.io/bash) -F app
@@ -93,9 +93,12 @@ jobs:
     <<: *container_config
     steps:
       - *attach_workspace
+      - run:
+          name: Accept licenses
+          command: yes | sdkmanager --licenses && yes | sdkmanager --update
       - run:
           name: Setup emulator
-          command: sdkmanager "system-images;android-19;default;armeabi-v7a" && echo "no" | avdmanager create avd -n test -k "system-images;android-19;default;armeabi-v7a"
+          command: sdkmanager "system-images;android-22;default;armeabi-v7a" && echo "no" | avdmanager create avd -n test -k "system-images;android-22;default;armeabi-v7a"
       - run:
           name: Launch emulator
           command: export LD_LIBRARY_PATH=${ANDROID_HOME}/emulator/lib64:${ANDROID_HOME}/emulator/lib64/qt/lib && emulator64-arm -avd test -noaudio -no-boot-anim -no-window -accel on
@@ -113,7 +116,7 @@ jobs:
             adb shell input keyevent 82
       - run:
           name: Run instrumented tests
-          command: ./gradlew clean createDebugCoverageReport jacocoTestReport --no-daemon --stacktrace --console=plain -PdisablePreDex
+          command: ./gradlew clean createFdroidDebugCoverageReport jacocoTestReport --no-daemon --stacktrace --console=plain -PdisablePreDex
       - run:
           name: Collect logs from emulator
           command: adb logcat -d > ./app/build/reports/logcat_emulator.txt
@@ -159,7 +162,7 @@ jobs:
             openssl aes-256-cbc -d -in ./app/upload-key-encrypted.jks -k $ENCRYPT_KEY >> ./app/upload-key.jks
       - run:
           name: Publish release
-          command: ./gradlew publish --no-daemon --stacktrace --console=plain -PenableCrashlytics -PdisablePreDex
+          command: ./gradlew publishPlayRelease --no-daemon --stacktrace --console=plain -PenableCrashlytics -PdisablePreDex
 
 workflows:
   version: 2
diff --git a/.gitignore b/.gitignore
index 6bc531b64..5c98a4cff 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,39 +1,90 @@
-/captures
-.externalNativeBuild
-
-## https://gist.github.com/iainconnor/8605514
+# Created by https://www.gitignore.io
 
 # Built application files
-/build
-/*/build/
+*.apk
+*.ap_
+*.aab
 
-# Crashlytics configuations
-com_crashlytics_export_strings.xml
+# Files for the ART/Dalvik VM
+*.dex
+
+# Java class files
+*.class
+
+# Generated files
+bin/
+gen/
+out/
+
+# Gradle files
+.gradle/
+build/
 
 # Local configuration file (sdk path, etc)
 local.properties
 
-# Gradle generated files
-.gradle/
+# Proguard folder generated by Eclipse
+proguard/
 
-# Signing files
-.signing/
+# Log Files
+*.log
 
-# User-specific configurations
-.idea/copyright/profiles_settings.xml
+# Android Studio Navigation editor temp files
+.navigation/
+
+# Android Studio captures folder
+captures/
+
+# IntelliJ configurations
+*.iml
+.idea/workspace.xml
+.idea/tasks.xml
+.idea/gradle.xml
+.idea/assetWizardSettings.xml
+.idea/dictionaries
+.idea/libraries
+.idea/caches
+.idea/modules.xml
+.idea/navEditor.xml
+.idea/caches/
 .idea/libraries/
-.idea/inspectionProfiles/
+.idea/shelf/
 .idea/.name
 .idea/compiler.xml
+.idea/copyright/profiles_settings.xml
 .idea/encodings.xml
 .idea/misc.xml
-.idea/modules.xml
 .idea/scopes/scope_settings.xml
-.idea/tasks.xml
 .idea/vcs.xml
-.idea/workspace.xml
-.idea/caches/
-*.iml
+.idea/jsLibraryMappings.xml
+.idea/datasources.xml
+.idea/dataSources.ids
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
+.idea/runConfigurations.xml
+
+# Keystore files
+*.jks
+*.keystore
+*.p12
+
+# External native build folder generated in Android Studio 2.2 and later
+.externalNativeBuild
+
+# Version control
+vcs.xml
+
+# lint
+lint/intermediates/
+lint/generated/
+lint/outputs/
+lint/tmp/
+lint/reports/
+
+### Android Patch ###
+gen-external-apklibs
+output.json
 
 # OS-specific files
 .DS_Store
@@ -43,8 +94,21 @@ local.properties
 .Trashes
 ehthumbs.db
 Thumbs.db
-.idea/caches/
-app/key.p12
-app/upload-key.jks
-*.log
-.idea/assetWizardSettings.xml
+
+# Legacy Eclipse project files
+.classpath
+.project
+.cproject
+.settings/
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.war
+*.ear
+
+### AndroidStudio Patch ###
+
+!/gradle/wrapper/gradle-wrapper.jar
+.idea/jarRepositories.xml
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0d1bcd5d2..a84ac8396 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -12,7 +12,7 @@ build:
   script:
     - ./gradlew --no-daemon --stacktrace dependencies || true
     - ./gradlew --no-daemon --stacktrace assembleDebug
-    - mv app/build/outputs/apk/debug/app-debug.apk .
+    - mv app/build/outputs/apk/fdroid/debug/app-fdroid-debug.apk .
   artifacts:
     name: "${CI_PROJECT_NAME}_${CI_BUILD_REF_NAME}-${CI_BUILD_ID}"
     paths:
@@ -26,7 +26,7 @@ tests:
      - .gradle
     policy: pull
   script:
-    - ./gradlew --no-daemon --stacktrace -x fabricGenerateResourcesRelease test
+    - ./gradlew --no-daemon --stacktrace -x fabricGenerateResourcesFdroidRelease -x fabricGenerateResourcesPlayRelease test
   artifacts:
     paths:
     - app/build/reports/tests
@@ -39,7 +39,7 @@ lint:
      - .gradle
     policy: pull
   script:
-    - ./gradlew --no-daemon --stacktrace -x fabricGenerateResourcesRelease lint
+    - ./gradlew --no-daemon --stacktrace -x fabricGenerateResourcesFdroidRelease -x fabricGenerateResourcesPlayRelease lint
   artifacts:
     paths:
     - app/build/reports
diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
index a8407c848..15a4246be 100644
--- a/.idea/codeStyles/Project.xml
+++ b/.idea/codeStyles/Project.xml
@@ -2,7 +2,7 @@
   <code_scheme name="Project" version="173">
     <option name="LINE_SEPARATOR" value="&#10;" />
     <AndroidXmlCodeStyleSettings>
-      <option name="USE_CUSTOM_SETTINGS" value="true" />
+      <option name="ARRANGEMENT_SETTINGS_MIGRATED_TO_191" value="true" />
     </AndroidXmlCodeStyleSettings>
     <JetCodeStyleSettings>
       <option name="PACKAGES_TO_USE_STAR_IMPORTS">
@@ -21,38 +21,10 @@
       <option name="CONTINUATION_INDENT_IN_ELVIS" value="false" />
       <option name="WRAP_ELVIS_EXPRESSIONS" value="0" />
     </JetCodeStyleSettings>
-    <Objective-C-extensions>
-      <file>
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Import" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Macro" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Typedef" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Enum" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Constant" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Global" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Struct" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="FunctionPredecl" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Function" />
-      </file>
-      <class>
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Property" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Synthesize" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="InitMethod" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="StaticMethod" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="InstanceMethod" />
-        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="DeallocMethod" />
-      </class>
-      <extensions>
-        <pair source="cpp" header="h" fileNamingConvention="NONE" />
-        <pair source="c" header="h" fileNamingConvention="NONE" />
-      </extensions>
-    </Objective-C-extensions>
-    <XML>
-      <option name="XML_KEEP_LINE_BREAKS" value="false" />
-      <option name="XML_ALIGN_ATTRIBUTES" value="false" />
-      <option name="XML_SPACE_INSIDE_EMPTY_TAG" value="true" />
-    </XML>
+    <MarkdownNavigatorCodeStyleSettings>
+      <option name="RIGHT_MARGIN" value="72" />
+    </MarkdownNavigatorCodeStyleSettings>
     <codeStyleSettings language="XML">
-      <option name="FORCE_REARRANGE_MODE" value="1" />
       <indentOptions>
         <option name="CONTINUATION_INDENT_SIZE" value="4" />
       </indentOptions>
@@ -63,6 +35,7 @@
               <match>
                 <AND>
                   <NAME>xmlns:android</NAME>
+                  <XML_ATTRIBUTE />
                   <XML_NAMESPACE>^$</XML_NAMESPACE>
                 </AND>
               </match>
@@ -73,6 +46,7 @@
               <match>
                 <AND>
                   <NAME>xmlns:.*</NAME>
+                  <XML_ATTRIBUTE />
                   <XML_NAMESPACE>^$</XML_NAMESPACE>
                 </AND>
               </match>
@@ -84,6 +58,7 @@
               <match>
                 <AND>
                   <NAME>.*:id</NAME>
+                  <XML_ATTRIBUTE />
                   <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
                 </AND>
               </match>
@@ -94,6 +69,7 @@
               <match>
                 <AND>
                   <NAME>.*:name</NAME>
+                  <XML_ATTRIBUTE />
                   <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
                 </AND>
               </match>
@@ -104,6 +80,7 @@
               <match>
                 <AND>
                   <NAME>name</NAME>
+                  <XML_ATTRIBUTE />
                   <XML_NAMESPACE>^$</XML_NAMESPACE>
                 </AND>
               </match>
@@ -114,6 +91,7 @@
               <match>
                 <AND>
                   <NAME>style</NAME>
+                  <XML_ATTRIBUTE />
                   <XML_NAMESPACE>^$</XML_NAMESPACE>
                 </AND>
               </match>
@@ -124,6 +102,7 @@
               <match>
                 <AND>
                   <NAME>.*</NAME>
+                  <XML_ATTRIBUTE />
                   <XML_NAMESPACE>^$</XML_NAMESPACE>
                 </AND>
               </match>
@@ -135,6 +114,7 @@
               <match>
                 <AND>
                   <NAME>.*</NAME>
+                  <XML_ATTRIBUTE />
                   <XML_NAMESPACE>http://schemas.android.com/apk/res/android</XML_NAMESPACE>
                 </AND>
               </match>
@@ -146,6 +126,7 @@
               <match>
                 <AND>
                   <NAME>.*</NAME>
+                  <XML_ATTRIBUTE />
                   <XML_NAMESPACE>.*</XML_NAMESPACE>
                 </AND>
               </match>
@@ -163,7 +144,6 @@
       <option name="METHOD_PARAMETERS_LPAREN_ON_NEXT_LINE" value="true" />
       <option name="METHOD_PARAMETERS_RPAREN_ON_NEXT_LINE" value="true" />
       <option name="EXTENDS_LIST_WRAP" value="1" />
-      <option name="METHOD_CALL_CHAIN_WRAP" value="1" />
       <indentOptions>
         <option name="CONTINUATION_INDENT_SIZE" value="4" />
       </indentOptions>
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
deleted file mode 100644
index 7ac24c777..000000000
--- a/.idea/gradle.xml
+++ /dev/null
@@ -1,18 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="GradleSettings">
-    <option name="linkedExternalProjectsSettings">
-      <GradleProjectSettings>
-        <option name="distributionType" value="DEFAULT_WRAPPED" />
-        <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="modules">
-          <set>
-            <option value="$PROJECT_DIR$" />
-            <option value="$PROJECT_DIR$/app" />
-          </set>
-        </option>
-        <option name="resolveModulePerSourceSet" value="false" />
-      </GradleProjectSettings>
-    </option>
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/runConfigurations.xml b/.idea/runConfigurations.xml
deleted file mode 100644
index 7f68460d8..000000000
--- a/.idea/runConfigurations.xml
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RunConfigurationProducerService">
-    <option name="ignoredProducers">
-      <set>
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.AllInPackageGradleConfigurationProducer" />
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestClassGradleConfigurationProducer" />
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestMethodGradleConfigurationProducer" />
-      </set>
-    </option>
-  </component>
-</project>
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
index 56c648589..d37308816 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,18 +3,18 @@ jdk: oraclejdk8
 
 env:
  global:
-    - ANDROID_API_LEVEL=28
-    - ANDROID_BUILD_TOOLS_VERSION=28.0.3
+    - ANDROID_API_LEVEL=29
+    - ANDROID_BUILD_TOOLS_VERSION=29.0.2
 
 cache:
   directories:
     - $HOME/.gradle/caches/
     - $HOME/.gradle/wrapper/
 
-#branches:
-#  only:
-#  - master
-#  - 0.7.x
+branches:
+  only:
+    - develop
+    - 0.14.1
 
 android:
  licenses:
@@ -34,12 +34,12 @@ android:
     - extra-android-m2repository
     - addon-google_apis-google-$ANDROID_API_LEVEL
     # Android emulator
-    - android-19
-    - sys-img-armeabi-v7a-android-19
+    - android-22
+    - sys-img-armeabi-v7a-android-22
 
 before_script:
     # Launch emulator before the execution
-    - echo no | android create avd --force -n test -t android-19 --abi armeabi-v7a
+    - echo no | android create avd --force -n test -t android-22 --abi armeabi-v7a
     - emulator -avd test -no-audio -no-window &
     - android-wait-for-emulator
     - adb shell input keyevent 82 &
@@ -48,20 +48,20 @@ before_script:
 script:
   - ./gradlew dependencies --stacktrace --daemon
   - fossa --no-ansi || true
-  - ./gradlew lint -x fabricGenerateResourcesRelease --stacktrace --daemon
-  - ./gradlew test -x fabricGenerateResourcesRelease --stacktrace --daemon
-  - ./gradlew createDebugCoverageReport --stacktrace --daemon
+  #- ./gradlew lintPlayRelease -x fabricGenerateResourcesPlayRelease --stacktrace --daemon
+  - ./gradlew testPlayDebugUnitTest -x fabricGenerateResourcesPlay --stacktrace --daemon
+  - ./gradlew createFdroidDebugCoverageReport --stacktrace --daemon
   - ./gradlew jacocoTestReport --stacktrace --daemon
   - if [ -z ${SONAR_HOST+x} ]; then echo "sonar scan skipped"; else
       git fetch --unshallow;
-      ./gradlew sonarqube -x test -x lint -x fabricGenerateResourcesRelease -Dsonar.host.url=$SONAR_HOST -Dsonar.organization=$SONAR_ORG -Dsonar.login=$SONAR_KEY -Dsonar.branch.name=${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH} --stacktrace --daemon;
+      ./gradlew sonarqube -x test -x lint -x fabricGenerateResourcesPlayRelease -x fabricGenerateResourcesFdroidRelease -Dsonar.host.url=$SONAR_HOST -Dsonar.organization=$SONAR_ORG -Dsonar.login=$SONAR_KEY -Dsonar.branch.name=${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH} --stacktrace --daemon;
     fi
   - |
     if [ $TRAVIS_TAG ]; then
       gpg --yes --batch --passphrase=$SERVICES_ENCRYPT_KEY ./app/src/release/google-services.json.gpg;
       gpg --yes --batch --passphrase=$ENCRYPT_KEY ./app/key.p12.gpg;
       gpg --yes --batch --passphrase=$ENCRYPT_KEY ./app/upload-key.jks.gpg;
-      ./gradlew publish -PenableCrashlytics --stacktrace;
+      ./gradlew publishPlayRelease -PenableCrashlytics --stacktrace;
     fi
 
 after_success:
diff --git a/LICENSE b/LICENSE
index f48b21143..5dd9cacf7 100644
--- a/LICENSE
+++ b/LICENSE
@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2017 wulkanowy
+   Copyright 2019 Wulkanowy
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
diff --git a/README.en.md b/README.en.md
new file mode 100644
index 000000000..7444cccae
--- /dev/null
+++ b/README.en.md
@@ -0,0 +1,61 @@
+[Polska wersja README](README.md)
+
+# Wulkanowy
+[![Travis](https://img.shields.io/travis/com/wulkanowy/wulkanowy/master.svg?style=flat-square)](https://travis-ci.com/wulkanowy/wulkanowy)
+[![Codecov](https://img.shields.io/codecov/c/github/wulkanowy/wulkanowy/master.svg?style=flat-square)](https://codecov.io/gh/wulkanowy/wulkanowy)
+[![Discord](https://img.shields.io/discord/390889354199040011.svg?style=flat-square)](https://discord.gg/vccAQBr)
+[![F-Droid](https://img.shields.io/f-droid/v/io.github.wulkanowy.svg?style=flat-square)](https://f-droid.org/packages/io.github.wulkanowy/)
+[![Last release](https://img.shields.io/github/release/wulkanowy/wulkanowy.svg?logo=github&style=flat-square)](https://github.com/wulkanowy/wulkanowy/releases)
+
+Unofficial android VULCAN UONET+ register client for both students and their parents
+
+## Features
+
+* logging in using the email and password OR using token and pin
+* functions from the register website:
+    * grades
+    * grade statistics
+    * attendance
+    * percentage of attendance
+    * exams
+    * timetable
+    * completed lessons
+    * messages
+    * homework
+    * notes
+    * lucky number
+* calculation of the average independently of school's preferences
+* notifications, e.g. about a new grade
+* dark and black (AMOLED) theme
+* offline mode
+* no ads
+
+## Download
+
+You can download the current beta version from the Google Play or the F-Droid store
+
+[<img src="https://play.google.com/intl/en_us/badges/images/generic/en_badge_web_generic.png"
+      alt="Get it on Google Play"
+      height="80">](https://play.google.com/store/apps/details?id=io.github.wulkanowy)
+[<img src="https://fdroid.gitlab.io/artwork/badge/get-it-on.png"
+    alt="Get it on F-Droid"
+    height="80">](https://f-droid.org/packages/io.github.wulkanowy/)
+    
+You can also download a [development version](https://wulkanowy.github.io/#download) that includes new features being prepared for the next release
+
+## Built With
+
+
+* [Wulkanowy SDK](https://github.com/wulkanowy/sdk)
+* [RxJava 2](https://github.com/ReactiveX/RxJava)
+* [Dagger 2](https://github.com/google/dagger)
+* [Room](https://developer.android.com/topic/libraries/architecture/room)
+* [WorkManager](https://developer.android.com/topic/libraries/architecture/workmanager) 
+
+## Contributing
+
+Please contribute to the project either by creating a PR or submitting an issue on GitHub.
+
+## License
+
+This project is licensed under the Apache License 2.0 - see the [LICENSE](LICENSE) file for details
diff --git a/README.md b/README.md
index 97a4172c4..61b13444a 100644
--- a/README.md
+++ b/README.md
@@ -1,22 +1,62 @@
+[English version of README](README.en.md)
+
 # Wulkanowy
-
-[![CircleCI](https://img.shields.io/circleci/project/github/wulkanowy/wulkanowy/master.svg?style=flat-square)](https://circleci.com/gh/wulkanowy/wulkanowy)
 [![Travis](https://img.shields.io/travis/com/wulkanowy/wulkanowy/master.svg?style=flat-square)](https://travis-ci.com/wulkanowy/wulkanowy)
-[![Bitrise](https://img.shields.io/bitrise/daeff1893f3c8128/master.svg?token=Hjm1ACamk86JDeVVJHOeqQ&style=flat-square)](https://www.bitrise.io/app/daeff1893f3c8128)
 [![Codecov](https://img.shields.io/codecov/c/github/wulkanowy/wulkanowy/master.svg?style=flat-square)](https://codecov.io/gh/wulkanowy/wulkanowy)
-[![BCH compliance](https://bettercodehub.com/edge/badge/wulkanowy/wulkanowy?branch=master)](https://bettercodehub.com/)
-[![Sonarcloud](https://sonarcloud.io/api/project_badges/measure?project=io.github.wulkanowy%3Aapp&metric=sqale_rating)](https://sonarcloud.io/dashboard?id=io.github.wulkanowy%3Aapp)
-[![FOSSA Status](https://app.fossa.com/api/projects/custom%2B5644%2Fgithub.com%2Fwulkanowy%2Fwulkanowy.svg?type=shield)](https://app.fossa.com/projects/custom%2B5644%2Fgithub.com%2Fwulkanowy%2Fwulkanowy?ref=badge_shield)
 [![Discord](https://img.shields.io/discord/390889354199040011.svg?style=flat-square)](https://discord.gg/vccAQBr)
+[![F-Droid](https://img.shields.io/f-droid/v/io.github.wulkanowy.svg?style=flat-square)](https://f-droid.org/packages/io.github.wulkanowy/)
+[![Last release](https://img.shields.io/github/release/wulkanowy/wulkanowy.svg?logo=github&style=flat-square)](https://github.com/wulkanowy/wulkanowy/releases)
 
-[Pobierz wersję beta z Google Play](https://play.google.com/store/apps/details?id=io.github.wulkanowy&amp;utm_source=vcs)
+Nieoficjalny klient dziennika VULCAN UONET+ dla ucznia i rodzica
 
-[Pobierz wersję DEV](https://bitrise-redirector.herokuapp.com/v0.1/apps/f841f20d8f8b1dc8/builds/master/artifacts/0)
-[(Więcej wersji DEV)](https://wulkanowy.github.io/dev.html)
+## Funkcje
 
-Androidowy klient dziennika VULCAN UONET+.
+* logowanie za pomocą e-maila i hasła LUB tokena i pinu
+* funkcje ze strony internetowej dziennika:
+    * oceny
+    * statystyki ocen
+    * frekwencja
+    * procent frekwencji
+    * sprawdziany
+    * plan lekcji
+    * lekcje zrealizowane
+    * wiadomości
+    * zadania domowe
+    * uwagi
+    * szczęśliwy numerek
+* obliczanie średniej niezależnie od preferencji szkoły
+* powiadomienia np. o nowej ocenie
+* ciemny i czarny (AMOLED) motyw
+* tryb offilne
+* brak reklam
+
+## Pobierz
+
+Aktualną wersję beta możesz pobrać ze sklepu Google Play lub F-Droid
+
+[<img src="https://play.google.com/intl/en_us/badges/images/generic/en_badge_web_generic.png"
+      alt="Pobierz z Google Play"
+      height="80">](https://play.google.com/store/apps/details?id=io.github.wulkanowy)
+[<img src="https://fdroid.gitlab.io/artwork/badge/get-it-on.png"
+    alt="Pobierz z F-Droid"
+    height="80">](https://f-droid.org/packages/io.github.wulkanowy/)
 
 
-## License
+Możesz także pobrać [wersję rozwojową](https://wulkanowy.github.io/#download), która zawiera nowe funkcje przygotowywane do następnego wydania
 
-[![FOSSA Status](https://app.fossa.com/api/projects/custom%2B5644%2Fgithub.com%2Fwulkanowy%2Fwulkanowy.svg?type=large)](https://app.fossa.com/projects/custom%2B5644%2Fgithub.com%2Fwulkanowy%2Fwulkanowy?ref=badge_large)
+
+## Zbudowana za pomocą
+
+* [Wulkanowy SDK](https://github.com/wulkanowy/SDK)
+* [RxJava 2](https://github.com/ReactiveX/RxJava)
+* [Dagger 2](https://github.com/google/dagger)
+* [Room](https://developer.android.com/topic/libraries/architecture/room)
+* [WorkManager](https://developer.android.com/topic/libraries/architecture/workmanager) 
+
+## Współpraca
+
+Wnieś swój wkład w projekt, tworząc PR lub wysyłając issue na GitHub.
+
+## Licencja
+
+Ten projekt udostępniany jest na licencji Apache License 2.0 - szczegóły w pliku [LICENSE](LICENSE)
diff --git a/app/.gitignore b/app/.gitignore
deleted file mode 100644
index 796b96d1c..000000000
--- a/app/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-/build
diff --git a/app/build.gradle b/app/build.gradle
index c58c1e337..452ddfb67 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -6,28 +6,32 @@ apply plugin: 'io.fabric'
 apply plugin: 'com.github.triplet.play'
 apply from: 'jacoco.gradle'
 apply from: 'sonarqube.gradle'
+apply from: 'hooks.gradle'
 
 android {
-    compileSdkVersion 28
-    buildToolsVersion '28.0.3'
+    compileSdkVersion 29
+    buildToolsVersion '29.0.2'
 
     defaultConfig {
         applicationId "io.github.wulkanowy"
         testApplicationId "io.github.tests.wulkanowy"
-        minSdkVersion 15
-        targetSdkVersion 28
-        versionCode 31
-        versionName "0.7.5"
+        minSdkVersion 16
+        targetSdkVersion 29
+        versionCode 50
+        versionName "0.14.1"
         multiDexEnabled true
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
         manifestPlaceholders = [
-                fabric_api_key: System.getenv("FABRIC_API_KEY") ?: "null",
+                fabric_api_key     : System.getenv("FABRIC_API_KEY") ?: "null",
                 crashlytics_enabled: project.hasProperty("enableCrashlytics")
         ]
         javaCompileOptions {
             annotationProcessorOptions {
-                arguments = ["room.schemaLocation": "$projectDir/schemas".toString()]
+                arguments = [
+                        "room.schemaLocation": "$projectDir/schemas".toString(),
+                        "room.incremental"   : "true"
+                ]
             }
         }
     }
@@ -59,7 +63,19 @@ android {
             versionNameSuffix "-dev"
             testCoverageEnabled = true
             ext.enableCrashlytics = project.hasProperty("enableCrashlytics")
-            multiDexKeepProguard file('proguard-multidex-rules.pro')
+        }
+    }
+
+    flavorDimensions "platform"
+
+    productFlavors {
+        play {
+            dimension "platform"
+        }
+
+        fdroid {
+            buildConfigField "boolean", "CRASHLYTICS_ENABLED", "false"
+            dimension "platform"
         }
     }
 
@@ -71,6 +87,15 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+
+    packagingOptions {
+        exclude 'META-INF/library_release.kotlin_module'
+        exclude 'META-INF/library-core_release.kotlin_module'
+    }
 }
 
 androidExtensions {
@@ -80,74 +105,98 @@ androidExtensions {
 play {
     serviceAccountEmail = System.getenv("PLAY_SERVICE_ACCOUNT_EMAIL") ?: "jan@fakelog.cf"
     serviceAccountCredentials = file('key.p12')
-    defaultToAppBundles = true
+    defaultToAppBundles = false
     track = 'alpha'
 }
 
+ext {
+    work_manager = "2.3.0-rc01"
+    room = "2.2.3"
+    dagger = "2.25.4"
+    chucker = "2.0.4"
+    mockk = "1.9.2"
+}
+
+configurations.all {
+    resolutionStrategy.force "androidx.constraintlayout:constraintlayout:1.1.3"
+}
+
 dependencies {
+    implementation "io.github.wulkanowy:sdk:0.14.1"
+
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
-    implementation('io.github.wulkanowy:api:0.7.5') { exclude module: "threetenbp" }
+    implementation "androidx.core:core-ktx:1.2.0-rc01"
+    implementation "androidx.activity:activity-ktx:1.1.0-rc03"
+    implementation "androidx.appcompat:appcompat:1.1.0"
+    implementation "androidx.appcompat:appcompat-resources:1.1.0"
+    implementation "androidx.fragment:fragment-ktx:1.2.0-rc05"
+    implementation "androidx.annotation:annotation:1.1.0"
+    implementation "androidx.multidex:multidex:2.0.1"
 
-    implementation "androidx.legacy:legacy-support-v4:1.0.0"
-    implementation "androidx.appcompat:appcompat:1.0.2"
-    implementation "androidx.cardview:cardview:1.0.0"
-    implementation "com.google.android.material:material:1.0.0"
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    implementation 'androidx.multidex:multidex:2.0.1'
+    implementation "androidx.preference:preference-ktx:1.1.0"
+    implementation "androidx.recyclerview:recyclerview:1.1.0"
+    implementation "androidx.viewpager:viewpager:1.0.0"
+    implementation "androidx.swiperefreshlayout:swiperefreshlayout:1.1.0-alpha03"
+    implementation "androidx.constraintlayout:constraintlayout:1.1.3"
+    implementation "androidx.coordinatorlayout:coordinatorlayout:1.1.0"
+    implementation "com.google.android.material:material:1.1.0-rc01"
+    implementation "com.github.wulkanowy:material-chips-input:2.0.1"
+    implementation "com.github.PhilJay:MPAndroidChart:v3.1.0"
+    implementation "me.zhanghai.android.materialprogressbar:library:1.6.1"
 
-    implementation "android.arch.work:work-runtime:1.0.0"
-    implementation "android.arch.work:work-rxjava2:1.0.0"
+    implementation "androidx.work:work-runtime-ktx:$work_manager"
+    implementation "androidx.work:work-rxjava2:$work_manager"
+    implementation "androidx.work:work-gcm:$work_manager"
 
-    implementation "androidx.room:room-runtime:2.1.0-alpha06"
-    implementation "androidx.room:room-rxjava2:2.1.0-alpha06"
-    kapt "androidx.room:room-compiler:2.1.0-alpha06"
+    implementation "androidx.room:room-runtime:$room"
+    implementation "androidx.room:room-rxjava2:$room"
+    implementation "androidx.room:room-ktx:$room"
+    kapt "androidx.room:room-compiler:$room"
 
-    implementation 'com.takisoft.preferencex:preferencex:1.0.0'
-
-    implementation 'com.squareup.inject:assisted-inject-annotations-dagger2:0.3.3'
-    kapt 'com.squareup.inject:assisted-inject-processor-dagger2:0.3.3'
-
-    implementation "com.google.dagger:dagger-android-support:2.21"
-    kapt "com.google.dagger:dagger-compiler:2.21"
-    kapt "com.google.dagger:dagger-android-processor:2.21"
+    implementation "com.google.dagger:dagger-android-support:$dagger"
+    kapt "com.google.dagger:dagger-compiler:$dagger"
+    kapt "com.google.dagger:dagger-android-processor:$dagger"
+    implementation "com.squareup.inject:assisted-inject-annotations-dagger2:0.5.2"
+    kapt "com.squareup.inject:assisted-inject-processor-dagger2:0.5.2"
 
     implementation "eu.davidea:flexible-adapter:5.1.0"
     implementation "eu.davidea:flexible-adapter-ui:1.0.0"
     implementation "com.aurelhubert:ahbottomnavigation:2.3.4"
-    implementation 'com.ncapdevi:frag-nav:3.2.0'
+    implementation "com.ncapdevi:frag-nav:3.3.0"
+    implementation "com.github.YarikSOffice:lingver:1.1.0"
 
-    implementation 'com.github.wulkanowy:MaterialChipsInput:b72fd0ee6f'
-    implementation 'com.github.PhilJay:MPAndroidChart:v3.1.0'
+    implementation "com.github.pwittchen:reactivenetwork-rx2:3.0.6"
+    implementation "io.reactivex.rxjava2:rxandroid:2.1.1"
+    implementation "io.reactivex.rxjava2:rxjava:2.2.16"
 
-    implementation 'com.github.pwittchen:reactivenetwork-rx2:3.0.2'
-    implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
-    implementation "io.reactivex.rxjava2:rxjava:2.2.7"
-
-    implementation "com.jakewharton.threetenabp:threetenabp:1.2.0"
+    implementation "com.google.code.gson:gson:2.8.6"
+    implementation "com.jakewharton.threetenabp:threetenabp:1.2.1"
     implementation "com.jakewharton.timber:timber:4.7.1"
     implementation "at.favre.lib:slf4j-timber:1.0.1"
-    implementation "com.mikepenz:aboutlibraries:6.2.3"
+    implementation "com.squareup.okhttp3:logging-interceptor:3.12.7"
+    implementation "com.mikepenz:aboutlibraries-core:7.1.0"
+    implementation 'com.wdullaer:materialdatetimepicker:4.2.3'
 
-    implementation 'com.google.firebase:firebase-core:16.0.8'
-    implementation 'com.crashlytics.sdk.android:crashlytics:2.9.9'
+    playImplementation "com.google.firebase:firebase-core:17.2.1"
+    playImplementation "com.crashlytics.sdk.android:crashlytics:2.10.1"
 
-    releaseImplementation 'fr.o80.chucker:library-no-op:2.0.4'
+    releaseImplementation "fr.o80.chucker:library-no-op:$chucker"
 
-    debugImplementation 'fr.o80.chucker:library:2.0.4'
+    debugImplementation "fr.o80.chucker:library:$chucker"
     debugImplementation "com.amitshekhar.android:debug-db:1.0.6"
 
-    testImplementation "junit:junit:4.12"
-    testImplementation "io.mockk:mockk:1.9.2"
-    testImplementation "org.mockito:mockito-inline:2.25.1"
-    testImplementation 'org.threeten:threetenbp:1.3.8'
+    testImplementation "junit:junit:4.13"
+    testImplementation "io.mockk:mockk:$mockk"
+    testImplementation "org.threeten:threetenbp:1.4.0"
+    testImplementation "org.mockito:mockito-inline:3.2.4"
 
-    androidTestImplementation 'androidx.test:core:1.1.0'
-    androidTestImplementation 'androidx.test:runner:1.1.1'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.0'
-    androidTestImplementation "io.mockk:mockk-android:1.9.2"
-    androidTestImplementation 'org.mockito:mockito-android:2.25.1'
-    androidTestImplementation "androidx.room:room-testing:2.1.0-alpha06"
+    androidTestImplementation "androidx.test:core:1.2.0"
+    androidTestImplementation "androidx.test:runner:1.2.0"
+    androidTestImplementation "androidx.test.ext:junit:1.1.1"
+    androidTestImplementation "io.mockk:mockk-android:$mockk"
+    androidTestImplementation "androidx.room:room-testing:$room"
     androidTestImplementation "org.jetbrains.kotlin:kotlin-test:$kotlin_version"
+    androidTestImplementation "org.mockito:mockito-android:3.2.4"
 }
 
 apply plugin: 'com.google.gms.google-services'
diff --git a/app/hooks.gradle b/app/hooks.gradle
new file mode 100644
index 000000000..038fa9fb2
--- /dev/null
+++ b/app/hooks.gradle
@@ -0,0 +1,10 @@
+apply plugin: "com.star-zero.gradle.githook"
+
+githook {
+    failOnMissingHooksDir = false
+    hooks {
+        "pre-push" {
+            shell = "./app/play-publish-lint.sh"
+        }
+    }
+}
diff --git a/app/jacoco.gradle b/app/jacoco.gradle
index f2b01b483..48a8fed96 100644
--- a/app/jacoco.gradle
+++ b/app/jacoco.gradle
@@ -1,7 +1,7 @@
 apply plugin: "jacoco"
 
 jacoco {
-    toolVersion "0.8.3"
+    toolVersion "0.8.4"
     reportsDir = file("$buildDir/reports")
 }
 
@@ -31,17 +31,20 @@ task jacocoTestReport(type: JacocoReport) {
                     '**/*_Provide*Factory*.*',
                     '**/*_Factory.*']
 
-    classDirectories = fileTree(
+    classDirectories.setFrom(fileTree(
             dir: "$buildDir/intermediates/classes/debug",
             excludes: excludes
     ) + fileTree(
-            dir: "$buildDir/tmp/kotlin-classes/debug",
+            dir: "$buildDir/tmp/kotlin-classes/playDebug",
             excludes: excludes
-    )
+    ))
 
-    sourceDirectories = files("$project.projectDir/src/main/java")
-    executionData = fileTree(
+    sourceDirectories.setFrom(files([
+            "src/main/java",
+            "src/play/java"
+    ]))
+    executionData.setFrom(fileTree(
             dir: project.projectDir,
             includes: ["**/*.exec", "**/*.ec"]
-    )
+    ))
 }
diff --git a/app/key-encrypted.p12 b/app/key-encrypted.p12
deleted file mode 100644
index d9811213f..000000000
Binary files a/app/key-encrypted.p12 and /dev/null differ
diff --git a/app/play-publish-lint.sh b/app/play-publish-lint.sh
new file mode 100755
index 000000000..d3354b1ad
--- /dev/null
+++ b/app/play-publish-lint.sh
@@ -0,0 +1,7 @@
+#!/bin/bash -
+
+content=$(cat < "app/src/main/play/release-notes/pl-PL/default.txt") || exit
+if [[ "${#content}" -gt 500 ]]; then
+    echo >&2 "Release notes content has reached the limit of 500 characters"
+    exit 1
+fi
diff --git a/app/proguard-multidex-rules.pro b/app/proguard-multidex-rules.pro
deleted file mode 100644
index 9ee1737f4..000000000
--- a/app/proguard-multidex-rules.pro
+++ /dev/null
@@ -1,3 +0,0 @@
--keep class android.support.test.internal** { *; }
--keep class org.junit.** { *; }
--keep public class io.github.wulkanowy** { *; }
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 15b628384..77339fe9e 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -11,6 +11,10 @@
 -verbose
 
 
+#Keep all wulkanowy files
+-keep class io.github.wulkanowy.** {*;}
+
+
 #Config for anallitycs
 -keepattributes *Annotation*
 -keepattributes SourceFile,LineNumberTable
@@ -32,8 +36,10 @@
 -dontwarn rx.internal.util.**
 -dontwarn sun.misc.Unsafe
 
+
 #Config for MPAndroidChart
 -keep class com.github.mikephil.charting.** { *; }
 
-#Config for API
--keep class io.github.wulkanowy.api.** {*;}
+
+#Config for Material Components
+-keep class com.google.android.material.tabs.** { *; }
diff --git a/app/schemas/io.github.wulkanowy.data.db.AppDatabase/14.json b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/14.json
new file mode 100644
index 000000000..82b764922
--- /dev/null
+++ b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/14.json
@@ -0,0 +1,1386 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 14,
+    "identityHash": "b22945c41e7841ff2e6b16af346dde0c",
+    "entities": [
+      {
+        "tableName": "Students",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `endpoint` TEXT NOT NULL, `loginType` TEXT NOT NULL, `email` TEXT NOT NULL, `password` TEXT NOT NULL, `symbol` TEXT NOT NULL, `student_id` INTEGER NOT NULL, `student_name` TEXT NOT NULL, `school_id` TEXT NOT NULL, `school_name` TEXT NOT NULL, `class_name` TEXT NOT NULL, `class_id` INTEGER NOT NULL, `is_current` INTEGER NOT NULL, `registration_date` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "endpoint",
+            "columnName": "endpoint",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginType",
+            "columnName": "loginType",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "email",
+            "columnName": "email",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "password",
+            "columnName": "password",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "symbol",
+            "columnName": "symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentName",
+            "columnName": "student_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolSymbol",
+            "columnName": "school_id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolName",
+            "columnName": "school_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "className",
+            "columnName": "class_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isCurrent",
+            "columnName": "is_current",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "registrationDate",
+            "columnName": "registration_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_Students_email_symbol_student_id_school_id_class_id",
+            "unique": true,
+            "columnNames": [
+              "email",
+              "symbol",
+              "student_id",
+              "school_id",
+              "class_id"
+            ],
+            "createSql": "CREATE UNIQUE INDEX `index_Students_email_symbol_student_id_school_id_class_id` ON `${TABLE_NAME}` (`email`, `symbol`, `student_id`, `school_id`, `class_id`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Semesters",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `diary_name` TEXT NOT NULL, `school_year` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `semester_name` INTEGER NOT NULL, `is_current` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `class_id` INTEGER NOT NULL, `unit_id` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryName",
+            "columnName": "diary_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolYear",
+            "columnName": "school_year",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterName",
+            "columnName": "semester_name",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isCurrent",
+            "columnName": "is_current",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unitId",
+            "columnName": "unit_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_Semesters_student_id_diary_id_semester_id",
+            "unique": true,
+            "columnNames": [
+              "student_id",
+              "diary_id",
+              "semester_id"
+            ],
+            "createSql": "CREATE UNIQUE INDEX `index_Semesters_student_id_diary_id_semester_id` ON `${TABLE_NAME}` (`student_id`, `diary_id`, `semester_id`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Exams",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `entry_date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `group` TEXT NOT NULL, `type` TEXT NOT NULL, `description` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entryDate",
+            "columnName": "entry_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "group",
+            "columnName": "group",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Timetable",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `number` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `subjectOld` TEXT NOT NULL, `group` TEXT NOT NULL, `room` TEXT NOT NULL, `roomOld` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacherOld` TEXT NOT NULL, `info` TEXT NOT NULL, `changes` INTEGER NOT NULL, `canceled` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subjectOld",
+            "columnName": "subjectOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "group",
+            "columnName": "group",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "room",
+            "columnName": "room",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roomOld",
+            "columnName": "roomOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherOld",
+            "columnName": "teacherOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "info",
+            "columnName": "info",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "changes",
+            "columnName": "changes",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "canceled",
+            "columnName": "canceled",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Attendance",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `number` INTEGER NOT NULL, `subject` TEXT NOT NULL, `name` TEXT NOT NULL, `presence` INTEGER NOT NULL, `absence` INTEGER NOT NULL, `exemption` INTEGER NOT NULL, `lateness` INTEGER NOT NULL, `excused` INTEGER NOT NULL, `deleted` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "presence",
+            "columnName": "presence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "exemption",
+            "columnName": "exemption",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lateness",
+            "columnName": "lateness",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "excused",
+            "columnName": "excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "deleted",
+            "columnName": "deleted",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "AttendanceSummary",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `subject_id` INTEGER NOT NULL, `month` INTEGER NOT NULL, `presence` INTEGER NOT NULL, `absence` INTEGER NOT NULL, `absence_excused` INTEGER NOT NULL, `absence_for_school_reasons` INTEGER NOT NULL, `lateness` INTEGER NOT NULL, `lateness_excused` INTEGER NOT NULL, `exemption` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subjectId",
+            "columnName": "subject_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "month",
+            "columnName": "month",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "presence",
+            "columnName": "presence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absenceExcused",
+            "columnName": "absence_excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absenceForSchoolReasons",
+            "columnName": "absence_for_school_reasons",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lateness",
+            "columnName": "lateness",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "latenessExcused",
+            "columnName": "lateness_excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "exemption",
+            "columnName": "exemption",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Grades",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_read` INTEGER NOT NULL, `is_notified` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `entry` TEXT NOT NULL, `value` INTEGER NOT NULL, `modifier` REAL NOT NULL, `comment` TEXT NOT NULL, `color` TEXT NOT NULL, `grade_symbol` TEXT NOT NULL, `description` TEXT NOT NULL, `weight` TEXT NOT NULL, `weightValue` REAL NOT NULL, `date` INTEGER NOT NULL, `teacher` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "is_read",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entry",
+            "columnName": "entry",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "value",
+            "columnName": "value",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "modifier",
+            "columnName": "modifier",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "comment",
+            "columnName": "comment",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "gradeSymbol",
+            "columnName": "grade_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weight",
+            "columnName": "weight",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weightValue",
+            "columnName": "weightValue",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesSummary",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `position` INTEGER NOT NULL, `subject` TEXT NOT NULL, `predicted_grade` TEXT NOT NULL, `final_grade` TEXT NOT NULL, `proposed_points` TEXT NOT NULL, `final_points` TEXT NOT NULL, `points_sum` TEXT NOT NULL, `average` REAL NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "position",
+            "columnName": "position",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "predictedGrade",
+            "columnName": "predicted_grade",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "finalGrade",
+            "columnName": "final_grade",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "proposedPoints",
+            "columnName": "proposed_points",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "finalPoints",
+            "columnName": "final_points",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "pointsSum",
+            "columnName": "points_sum",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "average",
+            "columnName": "average",
+            "affinity": "REAL",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesStatistics",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `grade` INTEGER NOT NULL, `amount` INTEGER NOT NULL, `is_semester` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "grade",
+            "columnName": "grade",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "amount",
+            "columnName": "amount",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semester",
+            "columnName": "is_semester",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Messages",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_notified` INTEGER NOT NULL, `content` TEXT, `student_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `message_id` INTEGER NOT NULL, `sender_name` TEXT NOT NULL, `sender_id` INTEGER NOT NULL, `recipient_name` TEXT NOT NULL, `subject` TEXT NOT NULL, `date` INTEGER NOT NULL, `folder_id` INTEGER NOT NULL, `unread` INTEGER NOT NULL, `unread_by` INTEGER NOT NULL, `read_by` INTEGER NOT NULL, `removed` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "messageId",
+            "columnName": "message_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "sender",
+            "columnName": "sender_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderId",
+            "columnName": "sender_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "recipient",
+            "columnName": "recipient_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "folderId",
+            "columnName": "folder_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unread",
+            "columnName": "unread",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unreadBy",
+            "columnName": "unread_by",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "readBy",
+            "columnName": "read_by",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "removed",
+            "columnName": "removed",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Notes",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_read` INTEGER NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `teacher` TEXT NOT NULL, `category` TEXT NOT NULL, `content` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "is_read",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "category",
+            "columnName": "category",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Homework",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `entry_date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `content` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entryDate",
+            "columnName": "entry_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Subjects",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `name` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "LuckyNumbers",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `lucky_number` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "luckyNumber",
+            "columnName": "lucky_number",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "CompletedLesson",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `number` INTEGER NOT NULL, `subject` TEXT NOT NULL, `topic` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL, `substitution` TEXT NOT NULL, `absence` TEXT NOT NULL, `resources` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "topic",
+            "columnName": "topic",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "substitution",
+            "columnName": "substitution",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "resources",
+            "columnName": "resources",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "ReportingUnits",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `short` TEXT NOT NULL, `sender_id` INTEGER NOT NULL, `sender_name` TEXT NOT NULL, `roles` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "shortName",
+            "columnName": "short",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderId",
+            "columnName": "sender_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderName",
+            "columnName": "sender_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roles",
+            "columnName": "roles",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Recipients",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `real_id` TEXT NOT NULL, `name` TEXT NOT NULL, `real_name` TEXT NOT NULL, `login_id` INTEGER NOT NULL, `unit_id` INTEGER NOT NULL, `role` INTEGER NOT NULL, `hash` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realName",
+            "columnName": "real_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginId",
+            "columnName": "login_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unitId",
+            "columnName": "unit_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "role",
+            "columnName": "role",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "hash",
+            "columnName": "hash",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, 'b22945c41e7841ff2e6b16af346dde0c')"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/app/schemas/io.github.wulkanowy.data.db.AppDatabase/15.json b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/15.json
new file mode 100644
index 000000000..6f2d1d1da
--- /dev/null
+++ b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/15.json
@@ -0,0 +1,1430 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 15,
+    "identityHash": "84b300bf53c7dd70b60a29a842275bb2",
+    "entities": [
+      {
+        "tableName": "Students",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `endpoint` TEXT NOT NULL, `loginType` TEXT NOT NULL, `email` TEXT NOT NULL, `password` TEXT NOT NULL, `symbol` TEXT NOT NULL, `student_id` INTEGER NOT NULL, `student_name` TEXT NOT NULL, `school_id` TEXT NOT NULL, `school_name` TEXT NOT NULL, `class_name` TEXT NOT NULL, `class_id` INTEGER NOT NULL, `is_current` INTEGER NOT NULL, `registration_date` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "endpoint",
+            "columnName": "endpoint",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginType",
+            "columnName": "loginType",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "email",
+            "columnName": "email",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "password",
+            "columnName": "password",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "symbol",
+            "columnName": "symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentName",
+            "columnName": "student_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolSymbol",
+            "columnName": "school_id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolName",
+            "columnName": "school_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "className",
+            "columnName": "class_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isCurrent",
+            "columnName": "is_current",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "registrationDate",
+            "columnName": "registration_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_Students_email_symbol_student_id_school_id_class_id",
+            "unique": true,
+            "columnNames": [
+              "email",
+              "symbol",
+              "student_id",
+              "school_id",
+              "class_id"
+            ],
+            "createSql": "CREATE UNIQUE INDEX `index_Students_email_symbol_student_id_school_id_class_id` ON `${TABLE_NAME}` (`email`, `symbol`, `student_id`, `school_id`, `class_id`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Semesters",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `diary_name` TEXT NOT NULL, `school_year` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `semester_name` INTEGER NOT NULL, `is_current` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `class_id` INTEGER NOT NULL, `unit_id` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryName",
+            "columnName": "diary_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolYear",
+            "columnName": "school_year",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterName",
+            "columnName": "semester_name",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isCurrent",
+            "columnName": "is_current",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unitId",
+            "columnName": "unit_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_Semesters_student_id_diary_id_semester_id",
+            "unique": true,
+            "columnNames": [
+              "student_id",
+              "diary_id",
+              "semester_id"
+            ],
+            "createSql": "CREATE UNIQUE INDEX `index_Semesters_student_id_diary_id_semester_id` ON `${TABLE_NAME}` (`student_id`, `diary_id`, `semester_id`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Exams",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `entry_date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `group` TEXT NOT NULL, `type` TEXT NOT NULL, `description` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entryDate",
+            "columnName": "entry_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "group",
+            "columnName": "group",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Timetable",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `number` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `subjectOld` TEXT NOT NULL, `group` TEXT NOT NULL, `room` TEXT NOT NULL, `roomOld` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacherOld` TEXT NOT NULL, `info` TEXT NOT NULL, `changes` INTEGER NOT NULL, `canceled` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subjectOld",
+            "columnName": "subjectOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "group",
+            "columnName": "group",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "room",
+            "columnName": "room",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roomOld",
+            "columnName": "roomOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherOld",
+            "columnName": "teacherOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "info",
+            "columnName": "info",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "changes",
+            "columnName": "changes",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "canceled",
+            "columnName": "canceled",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Attendance",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `number` INTEGER NOT NULL, `subject` TEXT NOT NULL, `name` TEXT NOT NULL, `presence` INTEGER NOT NULL, `absence` INTEGER NOT NULL, `exemption` INTEGER NOT NULL, `lateness` INTEGER NOT NULL, `excused` INTEGER NOT NULL, `deleted` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "presence",
+            "columnName": "presence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "exemption",
+            "columnName": "exemption",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lateness",
+            "columnName": "lateness",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "excused",
+            "columnName": "excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "deleted",
+            "columnName": "deleted",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "AttendanceSummary",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `subject_id` INTEGER NOT NULL, `month` INTEGER NOT NULL, `presence` INTEGER NOT NULL, `absence` INTEGER NOT NULL, `absence_excused` INTEGER NOT NULL, `absence_for_school_reasons` INTEGER NOT NULL, `lateness` INTEGER NOT NULL, `lateness_excused` INTEGER NOT NULL, `exemption` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subjectId",
+            "columnName": "subject_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "month",
+            "columnName": "month",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "presence",
+            "columnName": "presence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absenceExcused",
+            "columnName": "absence_excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absenceForSchoolReasons",
+            "columnName": "absence_for_school_reasons",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lateness",
+            "columnName": "lateness",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "latenessExcused",
+            "columnName": "lateness_excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "exemption",
+            "columnName": "exemption",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Grades",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_read` INTEGER NOT NULL, `is_notified` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `entry` TEXT NOT NULL, `value` INTEGER NOT NULL, `modifier` REAL NOT NULL, `comment` TEXT NOT NULL, `color` TEXT NOT NULL, `grade_symbol` TEXT NOT NULL, `description` TEXT NOT NULL, `weight` TEXT NOT NULL, `weightValue` REAL NOT NULL, `date` INTEGER NOT NULL, `teacher` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "is_read",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entry",
+            "columnName": "entry",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "value",
+            "columnName": "value",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "modifier",
+            "columnName": "modifier",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "comment",
+            "columnName": "comment",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "gradeSymbol",
+            "columnName": "grade_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weight",
+            "columnName": "weight",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weightValue",
+            "columnName": "weightValue",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesSummary",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `position` INTEGER NOT NULL, `subject` TEXT NOT NULL, `predicted_grade` TEXT NOT NULL, `final_grade` TEXT NOT NULL, `proposed_points` TEXT NOT NULL, `final_points` TEXT NOT NULL, `points_sum` TEXT NOT NULL, `average` REAL NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "position",
+            "columnName": "position",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "predictedGrade",
+            "columnName": "predicted_grade",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "finalGrade",
+            "columnName": "final_grade",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "proposedPoints",
+            "columnName": "proposed_points",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "finalPoints",
+            "columnName": "final_points",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "pointsSum",
+            "columnName": "points_sum",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "average",
+            "columnName": "average",
+            "affinity": "REAL",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesStatistics",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `grade` INTEGER NOT NULL, `amount` INTEGER NOT NULL, `is_semester` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "grade",
+            "columnName": "grade",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "amount",
+            "columnName": "amount",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semester",
+            "columnName": "is_semester",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Messages",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_notified` INTEGER NOT NULL, `content` TEXT, `student_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `message_id` INTEGER NOT NULL, `sender_name` TEXT NOT NULL, `sender_id` INTEGER NOT NULL, `recipient_name` TEXT NOT NULL, `subject` TEXT NOT NULL, `date` INTEGER NOT NULL, `folder_id` INTEGER NOT NULL, `unread` INTEGER NOT NULL, `unread_by` INTEGER NOT NULL, `read_by` INTEGER NOT NULL, `removed` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "messageId",
+            "columnName": "message_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "sender",
+            "columnName": "sender_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderId",
+            "columnName": "sender_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "recipient",
+            "columnName": "recipient_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "folderId",
+            "columnName": "folder_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unread",
+            "columnName": "unread",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unreadBy",
+            "columnName": "unread_by",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "readBy",
+            "columnName": "read_by",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "removed",
+            "columnName": "removed",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Notes",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_read` INTEGER NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `teacher` TEXT NOT NULL, `category` TEXT NOT NULL, `content` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "is_read",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "category",
+            "columnName": "category",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Homework",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `entry_date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `content` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entryDate",
+            "columnName": "entry_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Subjects",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `name` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "LuckyNumbers",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `lucky_number` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "luckyNumber",
+            "columnName": "lucky_number",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "CompletedLesson",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `number` INTEGER NOT NULL, `subject` TEXT NOT NULL, `topic` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL, `substitution` TEXT NOT NULL, `absence` TEXT NOT NULL, `resources` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "topic",
+            "columnName": "topic",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "substitution",
+            "columnName": "substitution",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "resources",
+            "columnName": "resources",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "ReportingUnits",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `short` TEXT NOT NULL, `sender_id` INTEGER NOT NULL, `sender_name` TEXT NOT NULL, `roles` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "shortName",
+            "columnName": "short",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderId",
+            "columnName": "sender_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderName",
+            "columnName": "sender_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roles",
+            "columnName": "roles",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Recipients",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `real_id` TEXT NOT NULL, `name` TEXT NOT NULL, `real_name` TEXT NOT NULL, `login_id` INTEGER NOT NULL, `unit_id` INTEGER NOT NULL, `role` INTEGER NOT NULL, `hash` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realName",
+            "columnName": "real_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginId",
+            "columnName": "login_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unitId",
+            "columnName": "unit_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "role",
+            "columnName": "role",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "hash",
+            "columnName": "hash",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "MobileDevices",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `device_id` INTEGER NOT NULL, `name` TEXT NOT NULL, `date` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "deviceId",
+            "columnName": "device_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '84b300bf53c7dd70b60a29a842275bb2')"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/app/schemas/io.github.wulkanowy.data.db.AppDatabase/16.json b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/16.json
new file mode 100644
index 000000000..34df45ebe
--- /dev/null
+++ b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/16.json
@@ -0,0 +1,1480 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 16,
+    "identityHash": "1eccdcb09adc922713ef67f298ec77a7",
+    "entities": [
+      {
+        "tableName": "Students",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `endpoint` TEXT NOT NULL, `loginType` TEXT NOT NULL, `email` TEXT NOT NULL, `password` TEXT NOT NULL, `symbol` TEXT NOT NULL, `student_id` INTEGER NOT NULL, `student_name` TEXT NOT NULL, `school_id` TEXT NOT NULL, `school_name` TEXT NOT NULL, `class_name` TEXT NOT NULL, `class_id` INTEGER NOT NULL, `is_current` INTEGER NOT NULL, `registration_date` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "endpoint",
+            "columnName": "endpoint",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginType",
+            "columnName": "loginType",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "email",
+            "columnName": "email",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "password",
+            "columnName": "password",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "symbol",
+            "columnName": "symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentName",
+            "columnName": "student_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolSymbol",
+            "columnName": "school_id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolName",
+            "columnName": "school_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "className",
+            "columnName": "class_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isCurrent",
+            "columnName": "is_current",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "registrationDate",
+            "columnName": "registration_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_Students_email_symbol_student_id_school_id_class_id",
+            "unique": true,
+            "columnNames": [
+              "email",
+              "symbol",
+              "student_id",
+              "school_id",
+              "class_id"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_Students_email_symbol_student_id_school_id_class_id` ON `${TABLE_NAME}` (`email`, `symbol`, `student_id`, `school_id`, `class_id`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Semesters",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `diary_name` TEXT NOT NULL, `school_year` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `semester_name` INTEGER NOT NULL, `is_current` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `class_id` INTEGER NOT NULL, `unit_id` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryName",
+            "columnName": "diary_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolYear",
+            "columnName": "school_year",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterName",
+            "columnName": "semester_name",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isCurrent",
+            "columnName": "is_current",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unitId",
+            "columnName": "unit_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_Semesters_student_id_diary_id_semester_id",
+            "unique": true,
+            "columnNames": [
+              "student_id",
+              "diary_id",
+              "semester_id"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_Semesters_student_id_diary_id_semester_id` ON `${TABLE_NAME}` (`student_id`, `diary_id`, `semester_id`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Exams",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `entry_date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `group` TEXT NOT NULL, `type` TEXT NOT NULL, `description` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entryDate",
+            "columnName": "entry_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "group",
+            "columnName": "group",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Timetable",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `number` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `subjectOld` TEXT NOT NULL, `group` TEXT NOT NULL, `room` TEXT NOT NULL, `roomOld` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacherOld` TEXT NOT NULL, `info` TEXT NOT NULL, `changes` INTEGER NOT NULL, `canceled` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subjectOld",
+            "columnName": "subjectOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "group",
+            "columnName": "group",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "room",
+            "columnName": "room",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roomOld",
+            "columnName": "roomOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherOld",
+            "columnName": "teacherOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "info",
+            "columnName": "info",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "changes",
+            "columnName": "changes",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "canceled",
+            "columnName": "canceled",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Attendance",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `number` INTEGER NOT NULL, `subject` TEXT NOT NULL, `name` TEXT NOT NULL, `presence` INTEGER NOT NULL, `absence` INTEGER NOT NULL, `exemption` INTEGER NOT NULL, `lateness` INTEGER NOT NULL, `excused` INTEGER NOT NULL, `deleted` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "presence",
+            "columnName": "presence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "exemption",
+            "columnName": "exemption",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lateness",
+            "columnName": "lateness",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "excused",
+            "columnName": "excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "deleted",
+            "columnName": "deleted",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "AttendanceSummary",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `subject_id` INTEGER NOT NULL, `month` INTEGER NOT NULL, `presence` INTEGER NOT NULL, `absence` INTEGER NOT NULL, `absence_excused` INTEGER NOT NULL, `absence_for_school_reasons` INTEGER NOT NULL, `lateness` INTEGER NOT NULL, `lateness_excused` INTEGER NOT NULL, `exemption` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subjectId",
+            "columnName": "subject_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "month",
+            "columnName": "month",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "presence",
+            "columnName": "presence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absenceExcused",
+            "columnName": "absence_excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absenceForSchoolReasons",
+            "columnName": "absence_for_school_reasons",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lateness",
+            "columnName": "lateness",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "latenessExcused",
+            "columnName": "lateness_excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "exemption",
+            "columnName": "exemption",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Grades",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_read` INTEGER NOT NULL, `is_notified` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `entry` TEXT NOT NULL, `value` INTEGER NOT NULL, `modifier` REAL NOT NULL, `comment` TEXT NOT NULL, `color` TEXT NOT NULL, `grade_symbol` TEXT NOT NULL, `description` TEXT NOT NULL, `weight` TEXT NOT NULL, `weightValue` REAL NOT NULL, `date` INTEGER NOT NULL, `teacher` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "is_read",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entry",
+            "columnName": "entry",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "value",
+            "columnName": "value",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "modifier",
+            "columnName": "modifier",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "comment",
+            "columnName": "comment",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "gradeSymbol",
+            "columnName": "grade_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weight",
+            "columnName": "weight",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weightValue",
+            "columnName": "weightValue",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesSummary",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `position` INTEGER NOT NULL, `subject` TEXT NOT NULL, `predicted_grade` TEXT NOT NULL, `final_grade` TEXT NOT NULL, `proposed_points` TEXT NOT NULL, `final_points` TEXT NOT NULL, `points_sum` TEXT NOT NULL, `average` REAL NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "position",
+            "columnName": "position",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "predictedGrade",
+            "columnName": "predicted_grade",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "finalGrade",
+            "columnName": "final_grade",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "proposedPoints",
+            "columnName": "proposed_points",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "finalPoints",
+            "columnName": "final_points",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "pointsSum",
+            "columnName": "points_sum",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "average",
+            "columnName": "average",
+            "affinity": "REAL",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesStatistics",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `grade` INTEGER NOT NULL, `amount` INTEGER NOT NULL, `is_semester` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "grade",
+            "columnName": "grade",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "amount",
+            "columnName": "amount",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semester",
+            "columnName": "is_semester",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesPointsStatistics",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `others` REAL NOT NULL, `student` REAL NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "others",
+            "columnName": "others",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "student",
+            "columnName": "student",
+            "affinity": "REAL",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Messages",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_notified` INTEGER NOT NULL, `content` TEXT, `student_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `message_id` INTEGER NOT NULL, `sender_name` TEXT NOT NULL, `sender_id` INTEGER NOT NULL, `recipient_name` TEXT NOT NULL, `subject` TEXT NOT NULL, `date` INTEGER NOT NULL, `folder_id` INTEGER NOT NULL, `unread` INTEGER NOT NULL, `unread_by` INTEGER NOT NULL, `read_by` INTEGER NOT NULL, `removed` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "messageId",
+            "columnName": "message_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "sender",
+            "columnName": "sender_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderId",
+            "columnName": "sender_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "recipient",
+            "columnName": "recipient_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "folderId",
+            "columnName": "folder_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unread",
+            "columnName": "unread",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unreadBy",
+            "columnName": "unread_by",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "readBy",
+            "columnName": "read_by",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "removed",
+            "columnName": "removed",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Notes",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_read` INTEGER NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `teacher` TEXT NOT NULL, `category` TEXT NOT NULL, `content` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "is_read",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "category",
+            "columnName": "category",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Homework",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `entry_date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `content` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entryDate",
+            "columnName": "entry_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Subjects",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `name` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "LuckyNumbers",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `lucky_number` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "luckyNumber",
+            "columnName": "lucky_number",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "CompletedLesson",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `number` INTEGER NOT NULL, `subject` TEXT NOT NULL, `topic` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL, `substitution` TEXT NOT NULL, `absence` TEXT NOT NULL, `resources` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "topic",
+            "columnName": "topic",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "substitution",
+            "columnName": "substitution",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "resources",
+            "columnName": "resources",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "ReportingUnits",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `short` TEXT NOT NULL, `sender_id` INTEGER NOT NULL, `sender_name` TEXT NOT NULL, `roles` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "shortName",
+            "columnName": "short",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderId",
+            "columnName": "sender_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderName",
+            "columnName": "sender_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roles",
+            "columnName": "roles",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Recipients",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `real_id` TEXT NOT NULL, `name` TEXT NOT NULL, `real_name` TEXT NOT NULL, `login_id` INTEGER NOT NULL, `unit_id` INTEGER NOT NULL, `role` INTEGER NOT NULL, `hash` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realName",
+            "columnName": "real_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginId",
+            "columnName": "login_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unitId",
+            "columnName": "unit_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "role",
+            "columnName": "role",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "hash",
+            "columnName": "hash",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "MobileDevices",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `device_id` INTEGER NOT NULL, `name` TEXT NOT NULL, `date` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "deviceId",
+            "columnName": "device_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '1eccdcb09adc922713ef67f298ec77a7')"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/app/schemas/io.github.wulkanowy.data.db.AppDatabase/17.json b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/17.json
new file mode 100644
index 000000000..8b777b7bf
--- /dev/null
+++ b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/17.json
@@ -0,0 +1,1530 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 17,
+    "identityHash": "8bcb3c86f1ddbdf7e20cfa8050525b95",
+    "entities": [
+      {
+        "tableName": "Students",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `endpoint` TEXT NOT NULL, `loginType` TEXT NOT NULL, `email` TEXT NOT NULL, `password` TEXT NOT NULL, `symbol` TEXT NOT NULL, `student_id` INTEGER NOT NULL, `student_name` TEXT NOT NULL, `school_id` TEXT NOT NULL, `school_name` TEXT NOT NULL, `class_name` TEXT NOT NULL, `class_id` INTEGER NOT NULL, `is_current` INTEGER NOT NULL, `registration_date` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "endpoint",
+            "columnName": "endpoint",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginType",
+            "columnName": "loginType",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "email",
+            "columnName": "email",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "password",
+            "columnName": "password",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "symbol",
+            "columnName": "symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentName",
+            "columnName": "student_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolSymbol",
+            "columnName": "school_id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolName",
+            "columnName": "school_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "className",
+            "columnName": "class_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isCurrent",
+            "columnName": "is_current",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "registrationDate",
+            "columnName": "registration_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_Students_email_symbol_student_id_school_id_class_id",
+            "unique": true,
+            "columnNames": [
+              "email",
+              "symbol",
+              "student_id",
+              "school_id",
+              "class_id"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_Students_email_symbol_student_id_school_id_class_id` ON `${TABLE_NAME}` (`email`, `symbol`, `student_id`, `school_id`, `class_id`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Semesters",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `diary_name` TEXT NOT NULL, `school_year` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `semester_name` INTEGER NOT NULL, `is_current` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `class_id` INTEGER NOT NULL, `unit_id` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryName",
+            "columnName": "diary_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolYear",
+            "columnName": "school_year",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterName",
+            "columnName": "semester_name",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isCurrent",
+            "columnName": "is_current",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unitId",
+            "columnName": "unit_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_Semesters_student_id_diary_id_semester_id",
+            "unique": true,
+            "columnNames": [
+              "student_id",
+              "diary_id",
+              "semester_id"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_Semesters_student_id_diary_id_semester_id` ON `${TABLE_NAME}` (`student_id`, `diary_id`, `semester_id`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Exams",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `entry_date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `group` TEXT NOT NULL, `type` TEXT NOT NULL, `description` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entryDate",
+            "columnName": "entry_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "group",
+            "columnName": "group",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Timetable",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `number` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `subjectOld` TEXT NOT NULL, `group` TEXT NOT NULL, `room` TEXT NOT NULL, `roomOld` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacherOld` TEXT NOT NULL, `info` TEXT NOT NULL, `changes` INTEGER NOT NULL, `canceled` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subjectOld",
+            "columnName": "subjectOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "group",
+            "columnName": "group",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "room",
+            "columnName": "room",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roomOld",
+            "columnName": "roomOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherOld",
+            "columnName": "teacherOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "info",
+            "columnName": "info",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "changes",
+            "columnName": "changes",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "canceled",
+            "columnName": "canceled",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Attendance",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `number` INTEGER NOT NULL, `subject` TEXT NOT NULL, `name` TEXT NOT NULL, `presence` INTEGER NOT NULL, `absence` INTEGER NOT NULL, `exemption` INTEGER NOT NULL, `lateness` INTEGER NOT NULL, `excused` INTEGER NOT NULL, `deleted` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "presence",
+            "columnName": "presence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "exemption",
+            "columnName": "exemption",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lateness",
+            "columnName": "lateness",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "excused",
+            "columnName": "excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "deleted",
+            "columnName": "deleted",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "AttendanceSummary",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `subject_id` INTEGER NOT NULL, `month` INTEGER NOT NULL, `presence` INTEGER NOT NULL, `absence` INTEGER NOT NULL, `absence_excused` INTEGER NOT NULL, `absence_for_school_reasons` INTEGER NOT NULL, `lateness` INTEGER NOT NULL, `lateness_excused` INTEGER NOT NULL, `exemption` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subjectId",
+            "columnName": "subject_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "month",
+            "columnName": "month",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "presence",
+            "columnName": "presence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absenceExcused",
+            "columnName": "absence_excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absenceForSchoolReasons",
+            "columnName": "absence_for_school_reasons",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lateness",
+            "columnName": "lateness",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "latenessExcused",
+            "columnName": "lateness_excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "exemption",
+            "columnName": "exemption",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Grades",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_read` INTEGER NOT NULL, `is_notified` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `entry` TEXT NOT NULL, `value` INTEGER NOT NULL, `modifier` REAL NOT NULL, `comment` TEXT NOT NULL, `color` TEXT NOT NULL, `grade_symbol` TEXT NOT NULL, `description` TEXT NOT NULL, `weight` TEXT NOT NULL, `weightValue` REAL NOT NULL, `date` INTEGER NOT NULL, `teacher` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "is_read",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entry",
+            "columnName": "entry",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "value",
+            "columnName": "value",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "modifier",
+            "columnName": "modifier",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "comment",
+            "columnName": "comment",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "gradeSymbol",
+            "columnName": "grade_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weight",
+            "columnName": "weight",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weightValue",
+            "columnName": "weightValue",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesSummary",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `position` INTEGER NOT NULL, `subject` TEXT NOT NULL, `predicted_grade` TEXT NOT NULL, `final_grade` TEXT NOT NULL, `proposed_points` TEXT NOT NULL, `final_points` TEXT NOT NULL, `points_sum` TEXT NOT NULL, `average` REAL NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "position",
+            "columnName": "position",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "predictedGrade",
+            "columnName": "predicted_grade",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "finalGrade",
+            "columnName": "final_grade",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "proposedPoints",
+            "columnName": "proposed_points",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "finalPoints",
+            "columnName": "final_points",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "pointsSum",
+            "columnName": "points_sum",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "average",
+            "columnName": "average",
+            "affinity": "REAL",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesStatistics",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `grade` INTEGER NOT NULL, `amount` INTEGER NOT NULL, `is_semester` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "grade",
+            "columnName": "grade",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "amount",
+            "columnName": "amount",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semester",
+            "columnName": "is_semester",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesPointsStatistics",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `others` REAL NOT NULL, `student` REAL NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "others",
+            "columnName": "others",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "student",
+            "columnName": "student",
+            "affinity": "REAL",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Messages",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_notified` INTEGER NOT NULL, `content` TEXT, `student_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `message_id` INTEGER NOT NULL, `sender_name` TEXT NOT NULL, `sender_id` INTEGER NOT NULL, `recipient_name` TEXT NOT NULL, `subject` TEXT NOT NULL, `date` INTEGER NOT NULL, `folder_id` INTEGER NOT NULL, `unread` INTEGER NOT NULL, `unread_by` INTEGER NOT NULL, `read_by` INTEGER NOT NULL, `removed` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "messageId",
+            "columnName": "message_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "sender",
+            "columnName": "sender_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderId",
+            "columnName": "sender_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "recipient",
+            "columnName": "recipient_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "folderId",
+            "columnName": "folder_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unread",
+            "columnName": "unread",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unreadBy",
+            "columnName": "unread_by",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "readBy",
+            "columnName": "read_by",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "removed",
+            "columnName": "removed",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Notes",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_read` INTEGER NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `teacher` TEXT NOT NULL, `category` TEXT NOT NULL, `content` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "is_read",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "category",
+            "columnName": "category",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Homework",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `entry_date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `content` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entryDate",
+            "columnName": "entry_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Subjects",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `name` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "LuckyNumbers",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `lucky_number` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "luckyNumber",
+            "columnName": "lucky_number",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "CompletedLesson",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `number` INTEGER NOT NULL, `subject` TEXT NOT NULL, `topic` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL, `substitution` TEXT NOT NULL, `absence` TEXT NOT NULL, `resources` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "topic",
+            "columnName": "topic",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "substitution",
+            "columnName": "substitution",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "resources",
+            "columnName": "resources",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "ReportingUnits",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `short` TEXT NOT NULL, `sender_id` INTEGER NOT NULL, `sender_name` TEXT NOT NULL, `roles` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "shortName",
+            "columnName": "short",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderId",
+            "columnName": "sender_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderName",
+            "columnName": "sender_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roles",
+            "columnName": "roles",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Recipients",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `real_id` TEXT NOT NULL, `name` TEXT NOT NULL, `real_name` TEXT NOT NULL, `login_id` INTEGER NOT NULL, `unit_id` INTEGER NOT NULL, `role` INTEGER NOT NULL, `hash` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realName",
+            "columnName": "real_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginId",
+            "columnName": "login_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unitId",
+            "columnName": "unit_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "role",
+            "columnName": "role",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "hash",
+            "columnName": "hash",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "MobileDevices",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `device_id` INTEGER NOT NULL, `name` TEXT NOT NULL, `date` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "deviceId",
+            "columnName": "device_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Teachers",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `class_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `name` TEXT NOT NULL, `short_name` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "shortName",
+            "columnName": "short_name",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '8bcb3c86f1ddbdf7e20cfa8050525b95')"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/app/schemas/io.github.wulkanowy.data.db.AppDatabase/18.json b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/18.json
new file mode 100644
index 000000000..4f7497fe0
--- /dev/null
+++ b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/18.json
@@ -0,0 +1,1592 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 18,
+    "identityHash": "73b1dcfe0cf84170ba102b2818dd0191",
+    "entities": [
+      {
+        "tableName": "Students",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `endpoint` TEXT NOT NULL, `loginType` TEXT NOT NULL, `email` TEXT NOT NULL, `password` TEXT NOT NULL, `symbol` TEXT NOT NULL, `student_id` INTEGER NOT NULL, `student_name` TEXT NOT NULL, `school_id` TEXT NOT NULL, `school_name` TEXT NOT NULL, `class_name` TEXT NOT NULL, `class_id` INTEGER NOT NULL, `is_current` INTEGER NOT NULL, `registration_date` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "endpoint",
+            "columnName": "endpoint",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginType",
+            "columnName": "loginType",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "email",
+            "columnName": "email",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "password",
+            "columnName": "password",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "symbol",
+            "columnName": "symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentName",
+            "columnName": "student_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolSymbol",
+            "columnName": "school_id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolName",
+            "columnName": "school_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "className",
+            "columnName": "class_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isCurrent",
+            "columnName": "is_current",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "registrationDate",
+            "columnName": "registration_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_Students_email_symbol_student_id_school_id_class_id",
+            "unique": true,
+            "columnNames": [
+              "email",
+              "symbol",
+              "student_id",
+              "school_id",
+              "class_id"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_Students_email_symbol_student_id_school_id_class_id` ON `${TABLE_NAME}` (`email`, `symbol`, `student_id`, `school_id`, `class_id`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Semesters",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `diary_name` TEXT NOT NULL, `school_year` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `semester_name` INTEGER NOT NULL, `is_current` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `class_id` INTEGER NOT NULL, `unit_id` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryName",
+            "columnName": "diary_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolYear",
+            "columnName": "school_year",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterName",
+            "columnName": "semester_name",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isCurrent",
+            "columnName": "is_current",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unitId",
+            "columnName": "unit_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_Semesters_student_id_diary_id_semester_id",
+            "unique": true,
+            "columnNames": [
+              "student_id",
+              "diary_id",
+              "semester_id"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_Semesters_student_id_diary_id_semester_id` ON `${TABLE_NAME}` (`student_id`, `diary_id`, `semester_id`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Exams",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `entry_date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `group` TEXT NOT NULL, `type` TEXT NOT NULL, `description` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entryDate",
+            "columnName": "entry_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "group",
+            "columnName": "group",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Timetable",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `number` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `subjectOld` TEXT NOT NULL, `group` TEXT NOT NULL, `room` TEXT NOT NULL, `roomOld` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacherOld` TEXT NOT NULL, `info` TEXT NOT NULL, `changes` INTEGER NOT NULL, `canceled` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subjectOld",
+            "columnName": "subjectOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "group",
+            "columnName": "group",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "room",
+            "columnName": "room",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roomOld",
+            "columnName": "roomOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherOld",
+            "columnName": "teacherOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "info",
+            "columnName": "info",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "changes",
+            "columnName": "changes",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "canceled",
+            "columnName": "canceled",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Attendance",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `number` INTEGER NOT NULL, `subject` TEXT NOT NULL, `name` TEXT NOT NULL, `presence` INTEGER NOT NULL, `absence` INTEGER NOT NULL, `exemption` INTEGER NOT NULL, `lateness` INTEGER NOT NULL, `excused` INTEGER NOT NULL, `deleted` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "presence",
+            "columnName": "presence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "exemption",
+            "columnName": "exemption",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lateness",
+            "columnName": "lateness",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "excused",
+            "columnName": "excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "deleted",
+            "columnName": "deleted",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "AttendanceSummary",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `subject_id` INTEGER NOT NULL, `month` INTEGER NOT NULL, `presence` INTEGER NOT NULL, `absence` INTEGER NOT NULL, `absence_excused` INTEGER NOT NULL, `absence_for_school_reasons` INTEGER NOT NULL, `lateness` INTEGER NOT NULL, `lateness_excused` INTEGER NOT NULL, `exemption` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subjectId",
+            "columnName": "subject_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "month",
+            "columnName": "month",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "presence",
+            "columnName": "presence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absenceExcused",
+            "columnName": "absence_excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absenceForSchoolReasons",
+            "columnName": "absence_for_school_reasons",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lateness",
+            "columnName": "lateness",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "latenessExcused",
+            "columnName": "lateness_excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "exemption",
+            "columnName": "exemption",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Grades",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_read` INTEGER NOT NULL, `is_notified` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `entry` TEXT NOT NULL, `value` INTEGER NOT NULL, `modifier` REAL NOT NULL, `comment` TEXT NOT NULL, `color` TEXT NOT NULL, `grade_symbol` TEXT NOT NULL, `description` TEXT NOT NULL, `weight` TEXT NOT NULL, `weightValue` REAL NOT NULL, `date` INTEGER NOT NULL, `teacher` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "is_read",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entry",
+            "columnName": "entry",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "value",
+            "columnName": "value",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "modifier",
+            "columnName": "modifier",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "comment",
+            "columnName": "comment",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "gradeSymbol",
+            "columnName": "grade_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weight",
+            "columnName": "weight",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weightValue",
+            "columnName": "weightValue",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesSummary",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `position` INTEGER NOT NULL, `subject` TEXT NOT NULL, `predicted_grade` TEXT NOT NULL, `final_grade` TEXT NOT NULL, `proposed_points` TEXT NOT NULL, `final_points` TEXT NOT NULL, `points_sum` TEXT NOT NULL, `average` REAL NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "position",
+            "columnName": "position",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "predictedGrade",
+            "columnName": "predicted_grade",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "finalGrade",
+            "columnName": "final_grade",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "proposedPoints",
+            "columnName": "proposed_points",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "finalPoints",
+            "columnName": "final_points",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "pointsSum",
+            "columnName": "points_sum",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "average",
+            "columnName": "average",
+            "affinity": "REAL",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesStatistics",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `grade` INTEGER NOT NULL, `amount` INTEGER NOT NULL, `is_semester` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "grade",
+            "columnName": "grade",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "amount",
+            "columnName": "amount",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semester",
+            "columnName": "is_semester",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesPointsStatistics",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `others` REAL NOT NULL, `student` REAL NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "others",
+            "columnName": "others",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "student",
+            "columnName": "student",
+            "affinity": "REAL",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Messages",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_notified` INTEGER NOT NULL, `content` TEXT, `student_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `message_id` INTEGER NOT NULL, `sender_name` TEXT NOT NULL, `sender_id` INTEGER NOT NULL, `recipient_name` TEXT NOT NULL, `subject` TEXT NOT NULL, `date` INTEGER NOT NULL, `folder_id` INTEGER NOT NULL, `unread` INTEGER NOT NULL, `unread_by` INTEGER NOT NULL, `read_by` INTEGER NOT NULL, `removed` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "messageId",
+            "columnName": "message_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "sender",
+            "columnName": "sender_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderId",
+            "columnName": "sender_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "recipient",
+            "columnName": "recipient_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "folderId",
+            "columnName": "folder_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unread",
+            "columnName": "unread",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unreadBy",
+            "columnName": "unread_by",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "readBy",
+            "columnName": "read_by",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "removed",
+            "columnName": "removed",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Notes",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_read` INTEGER NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `teacher` TEXT NOT NULL, `category` TEXT NOT NULL, `content` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "is_read",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "category",
+            "columnName": "category",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Homework",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `entry_date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `content` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entryDate",
+            "columnName": "entry_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Subjects",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `name` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "LuckyNumbers",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `lucky_number` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "luckyNumber",
+            "columnName": "lucky_number",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "CompletedLesson",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `number` INTEGER NOT NULL, `subject` TEXT NOT NULL, `topic` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL, `substitution` TEXT NOT NULL, `absence` TEXT NOT NULL, `resources` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "topic",
+            "columnName": "topic",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "substitution",
+            "columnName": "substitution",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "resources",
+            "columnName": "resources",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "ReportingUnits",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `short` TEXT NOT NULL, `sender_id` INTEGER NOT NULL, `sender_name` TEXT NOT NULL, `roles` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "shortName",
+            "columnName": "short",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderId",
+            "columnName": "sender_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderName",
+            "columnName": "sender_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roles",
+            "columnName": "roles",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Recipients",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `real_id` TEXT NOT NULL, `name` TEXT NOT NULL, `real_name` TEXT NOT NULL, `login_id` INTEGER NOT NULL, `unit_id` INTEGER NOT NULL, `role` INTEGER NOT NULL, `hash` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realName",
+            "columnName": "real_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginId",
+            "columnName": "login_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unitId",
+            "columnName": "unit_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "role",
+            "columnName": "role",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "hash",
+            "columnName": "hash",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "MobileDevices",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `device_id` INTEGER NOT NULL, `name` TEXT NOT NULL, `date` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "deviceId",
+            "columnName": "device_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Teachers",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `class_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `name` TEXT NOT NULL, `short_name` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "shortName",
+            "columnName": "short_name",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "School",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `class_id` INTEGER NOT NULL, `name` TEXT NOT NULL, `address` TEXT NOT NULL, `contact` TEXT NOT NULL, `headmaster` TEXT NOT NULL, `pedagogue` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "address",
+            "columnName": "address",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "contact",
+            "columnName": "contact",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "headmaster",
+            "columnName": "headmaster",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "pedagogue",
+            "columnName": "pedagogue",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '73b1dcfe0cf84170ba102b2818dd0191')"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/app/schemas/io.github.wulkanowy.data.db.AppDatabase/19.json b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/19.json
new file mode 100644
index 000000000..1e4593bb3
--- /dev/null
+++ b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/19.json
@@ -0,0 +1,1628 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 19,
+    "identityHash": "294f40cebf8314f9776208827240e65f",
+    "entities": [
+      {
+        "tableName": "Students",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `scrapper_base_url` TEXT NOT NULL, `mobile_base_url` TEXT NOT NULL, `login_type` TEXT NOT NULL, `login_mode` TEXT NOT NULL, `certificate_key` TEXT NOT NULL, `private_key` TEXT NOT NULL, `is_parent` INTEGER NOT NULL, `email` TEXT NOT NULL, `password` TEXT NOT NULL, `symbol` TEXT NOT NULL, `student_id` INTEGER NOT NULL, `user_login_id` INTEGER NOT NULL, `student_name` TEXT NOT NULL, `school_id` TEXT NOT NULL, `school_name` TEXT NOT NULL, `class_name` TEXT NOT NULL, `class_id` INTEGER NOT NULL, `is_current` INTEGER NOT NULL, `registration_date` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "scrapperBaseUrl",
+            "columnName": "scrapper_base_url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "mobileBaseUrl",
+            "columnName": "mobile_base_url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginType",
+            "columnName": "login_type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginMode",
+            "columnName": "login_mode",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "certificateKey",
+            "columnName": "certificate_key",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privateKey",
+            "columnName": "private_key",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isParent",
+            "columnName": "is_parent",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "email",
+            "columnName": "email",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "password",
+            "columnName": "password",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "symbol",
+            "columnName": "symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "userLoginId",
+            "columnName": "user_login_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentName",
+            "columnName": "student_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolSymbol",
+            "columnName": "school_id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolName",
+            "columnName": "school_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "className",
+            "columnName": "class_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isCurrent",
+            "columnName": "is_current",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "registrationDate",
+            "columnName": "registration_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_Students_email_symbol_student_id_school_id_class_id",
+            "unique": true,
+            "columnNames": [
+              "email",
+              "symbol",
+              "student_id",
+              "school_id",
+              "class_id"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_Students_email_symbol_student_id_school_id_class_id` ON `${TABLE_NAME}` (`email`, `symbol`, `student_id`, `school_id`, `class_id`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Semesters",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `diary_name` TEXT NOT NULL, `school_year` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `semester_name` INTEGER NOT NULL, `is_current` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `class_id` INTEGER NOT NULL, `unit_id` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryName",
+            "columnName": "diary_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "schoolYear",
+            "columnName": "school_year",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterName",
+            "columnName": "semester_name",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isCurrent",
+            "columnName": "is_current",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unitId",
+            "columnName": "unit_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_Semesters_student_id_diary_id_semester_id",
+            "unique": true,
+            "columnNames": [
+              "student_id",
+              "diary_id",
+              "semester_id"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_Semesters_student_id_diary_id_semester_id` ON `${TABLE_NAME}` (`student_id`, `diary_id`, `semester_id`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Exams",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `entry_date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `group` TEXT NOT NULL, `type` TEXT NOT NULL, `description` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entryDate",
+            "columnName": "entry_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "group",
+            "columnName": "group",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Timetable",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `number` INTEGER NOT NULL, `start` INTEGER NOT NULL, `end` INTEGER NOT NULL, `date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `subjectOld` TEXT NOT NULL, `group` TEXT NOT NULL, `room` TEXT NOT NULL, `roomOld` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacherOld` TEXT NOT NULL, `info` TEXT NOT NULL, `changes` INTEGER NOT NULL, `canceled` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "start",
+            "columnName": "start",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "end",
+            "columnName": "end",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subjectOld",
+            "columnName": "subjectOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "group",
+            "columnName": "group",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "room",
+            "columnName": "room",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roomOld",
+            "columnName": "roomOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherOld",
+            "columnName": "teacherOld",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "info",
+            "columnName": "info",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "changes",
+            "columnName": "changes",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "canceled",
+            "columnName": "canceled",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Attendance",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `number` INTEGER NOT NULL, `subject` TEXT NOT NULL, `name` TEXT NOT NULL, `presence` INTEGER NOT NULL, `absence` INTEGER NOT NULL, `exemption` INTEGER NOT NULL, `lateness` INTEGER NOT NULL, `excused` INTEGER NOT NULL, `deleted` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "presence",
+            "columnName": "presence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "exemption",
+            "columnName": "exemption",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lateness",
+            "columnName": "lateness",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "excused",
+            "columnName": "excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "deleted",
+            "columnName": "deleted",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "AttendanceSummary",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `subject_id` INTEGER NOT NULL, `month` INTEGER NOT NULL, `presence` INTEGER NOT NULL, `absence` INTEGER NOT NULL, `absence_excused` INTEGER NOT NULL, `absence_for_school_reasons` INTEGER NOT NULL, `lateness` INTEGER NOT NULL, `lateness_excused` INTEGER NOT NULL, `exemption` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subjectId",
+            "columnName": "subject_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "month",
+            "columnName": "month",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "presence",
+            "columnName": "presence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absenceExcused",
+            "columnName": "absence_excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absenceForSchoolReasons",
+            "columnName": "absence_for_school_reasons",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lateness",
+            "columnName": "lateness",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "latenessExcused",
+            "columnName": "lateness_excused",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "exemption",
+            "columnName": "exemption",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Grades",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_read` INTEGER NOT NULL, `is_notified` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `entry` TEXT NOT NULL, `value` REAL NOT NULL, `modifier` REAL NOT NULL, `comment` TEXT NOT NULL, `color` TEXT NOT NULL, `grade_symbol` TEXT NOT NULL, `description` TEXT NOT NULL, `weight` TEXT NOT NULL, `weightValue` REAL NOT NULL, `date` INTEGER NOT NULL, `teacher` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "is_read",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entry",
+            "columnName": "entry",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "value",
+            "columnName": "value",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "modifier",
+            "columnName": "modifier",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "comment",
+            "columnName": "comment",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "gradeSymbol",
+            "columnName": "grade_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weight",
+            "columnName": "weight",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "weightValue",
+            "columnName": "weightValue",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesSummary",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `position` INTEGER NOT NULL, `subject` TEXT NOT NULL, `predicted_grade` TEXT NOT NULL, `final_grade` TEXT NOT NULL, `proposed_points` TEXT NOT NULL, `final_points` TEXT NOT NULL, `points_sum` TEXT NOT NULL, `average` REAL NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "position",
+            "columnName": "position",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "predictedGrade",
+            "columnName": "predicted_grade",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "finalGrade",
+            "columnName": "final_grade",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "proposedPoints",
+            "columnName": "proposed_points",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "finalPoints",
+            "columnName": "final_points",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "pointsSum",
+            "columnName": "points_sum",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "average",
+            "columnName": "average",
+            "affinity": "REAL",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesStatistics",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `grade` INTEGER NOT NULL, `amount` INTEGER NOT NULL, `is_semester` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "grade",
+            "columnName": "grade",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "amount",
+            "columnName": "amount",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semester",
+            "columnName": "is_semester",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "GradesPointsStatistics",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `semester_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `others` REAL NOT NULL, `student` REAL NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "others",
+            "columnName": "others",
+            "affinity": "REAL",
+            "notNull": true
+          },
+          {
+            "fieldPath": "student",
+            "columnName": "student",
+            "affinity": "REAL",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Messages",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `message_id` INTEGER NOT NULL, `sender_name` TEXT NOT NULL, `sender_id` INTEGER NOT NULL, `recipient_name` TEXT NOT NULL, `subject` TEXT NOT NULL, `content` TEXT NOT NULL, `date` INTEGER NOT NULL, `folder_id` INTEGER NOT NULL, `unread` INTEGER NOT NULL, `unread_by` INTEGER NOT NULL, `read_by` INTEGER NOT NULL, `removed` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "messageId",
+            "columnName": "message_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "sender",
+            "columnName": "sender_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderId",
+            "columnName": "sender_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "recipient",
+            "columnName": "recipient_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "folderId",
+            "columnName": "folder_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unread",
+            "columnName": "unread",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unreadBy",
+            "columnName": "unread_by",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "readBy",
+            "columnName": "read_by",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "removed",
+            "columnName": "removed",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Notes",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_read` INTEGER NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `teacher` TEXT NOT NULL, `category` TEXT NOT NULL, `content` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "is_read",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "category",
+            "columnName": "category",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Homework",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `semester_id` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `entry_date` INTEGER NOT NULL, `subject` TEXT NOT NULL, `content` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "semesterId",
+            "columnName": "semester_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "entryDate",
+            "columnName": "entry_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Subjects",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `name` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "LuckyNumbers",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `is_notified` INTEGER NOT NULL, `student_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `lucky_number` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isNotified",
+            "columnName": "is_notified",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "luckyNumber",
+            "columnName": "lucky_number",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "CompletedLesson",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `diary_id` INTEGER NOT NULL, `date` INTEGER NOT NULL, `number` INTEGER NOT NULL, `subject` TEXT NOT NULL, `topic` TEXT NOT NULL, `teacher` TEXT NOT NULL, `teacher_symbol` TEXT NOT NULL, `substitution` TEXT NOT NULL, `absence` TEXT NOT NULL, `resources` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "diaryId",
+            "columnName": "diary_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "number",
+            "columnName": "number",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "topic",
+            "columnName": "topic",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacher",
+            "columnName": "teacher",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "teacherSymbol",
+            "columnName": "teacher_symbol",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "substitution",
+            "columnName": "substitution",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "absence",
+            "columnName": "absence",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "resources",
+            "columnName": "resources",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "ReportingUnits",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `real_id` INTEGER NOT NULL, `short` TEXT NOT NULL, `sender_id` INTEGER NOT NULL, `sender_name` TEXT NOT NULL, `roles` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "shortName",
+            "columnName": "short",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderId",
+            "columnName": "sender_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "senderName",
+            "columnName": "sender_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "roles",
+            "columnName": "roles",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Recipients",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `real_id` TEXT NOT NULL, `name` TEXT NOT NULL, `real_name` TEXT NOT NULL, `login_id` INTEGER NOT NULL, `unit_id` INTEGER NOT NULL, `role` INTEGER NOT NULL, `hash` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realId",
+            "columnName": "real_id",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "realName",
+            "columnName": "real_name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "loginId",
+            "columnName": "login_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "unitId",
+            "columnName": "unit_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "role",
+            "columnName": "role",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "hash",
+            "columnName": "hash",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "MobileDevices",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `device_id` INTEGER NOT NULL, `name` TEXT NOT NULL, `date` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "deviceId",
+            "columnName": "device_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "date",
+            "columnName": "date",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "Teachers",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `class_id` INTEGER NOT NULL, `subject` TEXT NOT NULL, `name` TEXT NOT NULL, `short_name` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subject",
+            "columnName": "subject",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "shortName",
+            "columnName": "short_name",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "School",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `student_id` INTEGER NOT NULL, `class_id` INTEGER NOT NULL, `name` TEXT NOT NULL, `address` TEXT NOT NULL, `contact` TEXT NOT NULL, `headmaster` TEXT NOT NULL, `pedagogue` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "studentId",
+            "columnName": "student_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "classId",
+            "columnName": "class_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "address",
+            "columnName": "address",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "contact",
+            "columnName": "contact",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "headmaster",
+            "columnName": "headmaster",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "pedagogue",
+            "columnName": "pedagogue",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '294f40cebf8314f9776208827240e65f')"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/app/sonarqube.gradle b/app/sonarqube.gradle
index 52fd2dd8b..3dad10344 100644
--- a/app/sonarqube.gradle
+++ b/app/sonarqube.gradle
@@ -29,5 +29,6 @@ sonarqube {
         property "sonar.java.coveragePlugin", "jacoco"
         property "sonar.android.lint.report", "build/reports/lint-results.xml"
         property "sonar.jacoco.reportPaths", fileTree(dir: project.projectDir, includes: ['**/*.exec', '**/*.ec'])
+        property "sonar.coverage.jacoco.xmlReportPaths", "build/reports/jacocoTestReport/jacocoTestReport.xml"
     }
 }
diff --git a/app/src/androidTest/java/io/github/wulkanowy/data/db/migrations/AbstractMigrationTest.kt b/app/src/androidTest/java/io/github/wulkanowy/data/db/migrations/AbstractMigrationTest.kt
index 507105f6d..611161e58 100644
--- a/app/src/androidTest/java/io/github/wulkanowy/data/db/migrations/AbstractMigrationTest.kt
+++ b/app/src/androidTest/java/io/github/wulkanowy/data/db/migrations/AbstractMigrationTest.kt
@@ -1,11 +1,13 @@
 package io.github.wulkanowy.data.db.migrations
 
+import androidx.preference.PreferenceManager
 import androidx.room.Room
 import androidx.room.testing.MigrationTestHelper
 import androidx.sqlite.db.framework.FrameworkSQLiteOpenHelperFactory
 import androidx.test.core.app.ApplicationProvider
 import androidx.test.platform.app.InstrumentationRegistry
 import io.github.wulkanowy.data.db.AppDatabase
+import io.github.wulkanowy.data.db.SharedPrefProvider
 import org.junit.Rule
 
 abstract class AbstractMigrationTest {
@@ -22,7 +24,9 @@ abstract class AbstractMigrationTest {
     fun getMigratedRoomDatabase(): AppDatabase {
         val database = Room.databaseBuilder(ApplicationProvider.getApplicationContext(),
             AppDatabase::class.java, dbName)
-            .addMigrations(Migration12(), Migration13())
+            .addMigrations(*AppDatabase.getMigrations(SharedPrefProvider(PreferenceManager
+                .getDefaultSharedPreferences(ApplicationProvider.getApplicationContext())))
+            )
             .build()
         // close the database and release any stream resources when the test finishes
         helper.closeWhenFinished(database)
diff --git a/app/src/androidTest/java/io/github/wulkanowy/data/db/migrations/Migration13Test.kt b/app/src/androidTest/java/io/github/wulkanowy/data/db/migrations/Migration13Test.kt
index eb9d02a59..8311f94b5 100644
--- a/app/src/androidTest/java/io/github/wulkanowy/data/db/migrations/Migration13Test.kt
+++ b/app/src/androidTest/java/io/github/wulkanowy/data/db/migrations/Migration13Test.kt
@@ -3,10 +3,14 @@ package io.github.wulkanowy.data.db.migrations
 import android.content.ContentValues
 import android.database.sqlite.SQLiteDatabase
 import androidx.sqlite.db.SupportSQLiteDatabase
+import io.github.wulkanowy.data.db.Converters
+import io.github.wulkanowy.data.db.entities.Semester
 import org.junit.Assert.assertEquals
-import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
 import org.junit.Test
+import org.threeten.bp.LocalDate.now
 import org.threeten.bp.LocalDate.of
+import kotlin.test.assertFalse
 import kotlin.test.assertTrue
 
 class Migration13Test : AbstractMigrationTest() {
@@ -97,11 +101,9 @@ class Migration13Test : AbstractMigrationTest() {
             close()
         }
 
-        helper.runMigrationsAndValidate(dbName, 13, true, Migration13())
+        val db = helper.runMigrationsAndValidate(dbName, 13, true, Migration13())
 
-        val db = getMigratedRoomDatabase()
-
-        val semesters1 = db.semesterDao.loadAll(1, 5).blockingGet()
+        val semesters1 = getSemesters(db, "SELECT * FROM Semesters WHERE student_id = 1 AND class_id = 5")
         assertTrue { semesters1.single { it.isCurrent }.isCurrent }
         semesters1[0].run {
             assertFalse(isCurrent)
@@ -119,7 +121,7 @@ class Migration13Test : AbstractMigrationTest() {
             assertEquals(2, diaryId)
         }
 
-        db.semesterDao.loadAll(2, 5).blockingGet().let {
+        getSemesters(db, "SELECT * FROM Semesters WHERE student_id = 2 AND class_id = 5").let {
             assertTrue { it.single { it.isCurrent }.isCurrent }
             assertEquals(1970, it[0].schoolYear)
             assertEquals(of(1970, 1, 1), it[0].end)
@@ -130,7 +132,7 @@ class Migration13Test : AbstractMigrationTest() {
             assertTrue(it[3].isCurrent)
         }
 
-        db.semesterDao.loadAll(2, 5).blockingGet().let {
+        getSemesters(db, "SELECT * FROM Semesters WHERE student_id = 2 AND class_id = 5").let {
             assertTrue { it.single { it.isCurrent }.isCurrent }
             assertFalse(it[0].isCurrent)
             assertFalse(it[1].isCurrent)
@@ -139,6 +141,30 @@ class Migration13Test : AbstractMigrationTest() {
         }
     }
 
+    private fun getSemesters(db: SupportSQLiteDatabase, query: String): List<Semester> {
+        val semesters = mutableListOf<Semester>()
+
+        val cursor = db.query(query)
+        if (cursor.moveToFirst()) {
+            do {
+                semesters.add(Semester(
+                    studentId = cursor.getInt(1),
+                    diaryId = cursor.getInt(2),
+                    diaryName = cursor.getString(3),
+                    semesterId = cursor.getInt(4),
+                    semesterName = cursor.getInt(5),
+                    isCurrent = cursor.getInt(6) == 1,
+                    classId = cursor.getInt(7),
+                    unitId = cursor.getInt(8),
+                    schoolYear = cursor.getInt(9),
+                    start = Converters().timestampToDate(cursor.getLong(10))!!,
+                    end = Converters().timestampToDate(cursor.getLong(11))!!
+                ))
+            } while (cursor.moveToNext())
+        }
+        return semesters.toList()
+    }
+
     private fun createStudent(db: SupportSQLiteDatabase, studentId: Int, schoolName: String = "", classId: Int = -1, schoolId: Int = 123) {
         db.insert("Students", SQLiteDatabase.CONFLICT_FAIL, ContentValues().apply {
             put("endpoint", "https://fakelog.cf")
diff --git a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/grade/GradeRepositoryTest.kt b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/grade/GradeRepositoryTest.kt
index 17e788fc0..711e29118 100644
--- a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/grade/GradeRepositoryTest.kt
+++ b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/grade/GradeRepositoryTest.kt
@@ -6,15 +6,18 @@ import androidx.test.core.app.ApplicationProvider.getApplicationContext
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.filters.SdkSuppress
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
-import io.github.wulkanowy.api.Api
+import io.github.wulkanowy.data.SdkHelper
 import io.github.wulkanowy.data.db.AppDatabase
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.repositories.TestInternetObservingStrategy
+import io.github.wulkanowy.sdk.Sdk
 import io.mockk.MockKAnnotations
 import io.mockk.every
 import io.mockk.impl.annotations.MockK
 import io.mockk.impl.annotations.SpyK
+import io.mockk.just
+import io.mockk.runs
 import io.reactivex.Single
 import org.junit.After
 import org.junit.Before
@@ -22,16 +25,16 @@ import org.junit.Test
 import org.junit.runner.RunWith
 import org.threeten.bp.LocalDate.of
 import org.threeten.bp.LocalDateTime
+import kotlin.test.assertEquals
 import kotlin.test.assertFalse
 import kotlin.test.assertTrue
-import io.github.wulkanowy.api.grades.Grade as GradeApi
 
 @SdkSuppress(minSdkVersion = P)
 @RunWith(AndroidJUnit4::class)
 class GradeRepositoryTest {
 
-    @SpyK
-    private var mockApi = Api()
+    @MockK
+    private lateinit var mockSdk: Sdk
 
     private val settings = InternetObservingSettings.builder()
         .strategy(TestInternetObservingStrategy())
@@ -54,13 +57,14 @@ class GradeRepositoryTest {
         MockKAnnotations.init(this)
         testDb = Room.inMemoryDatabaseBuilder(getApplicationContext(), AppDatabase::class.java).build()
         gradeLocal = GradeLocal(testDb.gradeDao)
-        gradeRemote = GradeRemote(mockApi)
+        gradeRemote = GradeRemote(mockSdk)
 
-        every { mockApi.diaryId } returns 1
         every { studentMock.registrationDate } returns LocalDateTime.of(2019, 2, 27, 12, 0)
         every { semesterMock.studentId } returns 1
-        every { semesterMock.semesterId } returns 1
         every { semesterMock.diaryId } returns 1
+        every { semesterMock.schoolYear } returns 2019
+        every { semesterMock.semesterId } returns 1
+        every { mockSdk.switchDiary(any(), any()) } returns mockSdk
     }
 
     @After
@@ -70,7 +74,7 @@ class GradeRepositoryTest {
 
     @Test
     fun markOlderThanRegisterDateAsRead() {
-        every { mockApi.getGrades(1) } returns Single.just(listOf(
+        every { mockSdk.getGrades(1) } returns Single.just(listOf(
             createGradeApi(5, 4.0, of(2019, 2, 25), "Ocena pojawiła się"),
             createGradeApi(5, 4.0, of(2019, 2, 26), "przed zalogowanie w aplikacji"),
             createGradeApi(5, 4.0, of(2019, 2, 27), "Ocena z dnia logowania"),
@@ -94,7 +98,7 @@ class GradeRepositoryTest {
             createGradeLocal(3, 5.0, of(2019, 2, 27), "Trzecia")
         ))
 
-        every { mockApi.getGrades(1) } returns Single.just(listOf(
+        every { mockSdk.getGrades(1) } returns Single.just(listOf(
             createGradeApi(5, 2.0, of(2019, 2, 25), "Ocena ma datę, jest inna, ale nie zostanie powiadomiona"),
             createGradeApi(4, 3.0, of(2019, 2, 26), "starszą niż ostatnia lokalnie"),
             createGradeApi(3, 4.0, of(2019, 2, 27), "Ta jest z tego samego dnia co ostatnia lokalnie"),
@@ -109,4 +113,73 @@ class GradeRepositoryTest {
         assertTrue { grades[2].isRead }
         assertTrue { grades[3].isRead }
     }
+
+    @Test
+    fun subtractLocaleDuplicateGrades() {
+        gradeLocal.saveGrades(listOf(
+            createGradeLocal(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
+            createGradeLocal(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
+            createGradeLocal(3, 5.0, of(2019, 2, 26), "Jakaś inna ocena")
+        ))
+
+        every { mockSdk.getGrades(1) } returns Single.just(listOf(
+            createGradeApi(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
+            createGradeApi(3, 5.0, of(2019, 2, 26), "Jakaś inna ocena")
+        ))
+
+        val grades = GradeRepository(settings, gradeLocal, gradeRemote)
+            .getGrades(studentMock, semesterMock, true).blockingGet()
+
+        assertEquals(2, grades.size)
+    }
+
+    @Test
+    fun subtractRemoteDuplicateGrades() {
+        gradeLocal.saveGrades(listOf(
+            createGradeLocal(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
+            createGradeLocal(3, 5.0, of(2019, 2, 26), "Jakaś inna ocena")
+        ))
+
+        every { mockSdk.getGrades(1) } returns Single.just(listOf(
+            createGradeApi(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
+            createGradeApi(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
+            createGradeApi(3, 5.0, of(2019, 2, 26), "Jakaś inna ocena")
+        ))
+
+        val grades = GradeRepository(settings, gradeLocal, gradeRemote)
+            .getGrades(studentMock, semesterMock, true).blockingGet()
+
+        assertEquals(3, grades.size)
+    }
+
+    @Test
+    fun emptyLocal() {
+        gradeLocal.saveGrades(listOf())
+
+        every { mockSdk.getGrades(1) } returns Single.just(listOf(
+            createGradeApi(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
+            createGradeApi(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
+            createGradeApi(3, 5.0, of(2019, 2, 26), "Jakaś inna ocena")
+        ))
+
+        val grades = GradeRepository(settings, gradeLocal, gradeRemote)
+            .getGrades(studentMock, semesterMock, true).blockingGet()
+
+        assertEquals(3, grades.size)
+    }
+
+    @Test
+    fun emptyRemote() {
+        gradeLocal.saveGrades(listOf(
+            createGradeLocal(5, 3.0, of(2019, 2, 25), "Taka sama ocena"),
+            createGradeLocal(3, 5.0, of(2019, 2, 26), "Jakaś inna ocena")
+        ))
+
+        every { mockSdk.getGrades(1) } returns Single.just(listOf())
+
+        val grades = GradeRepository(settings, gradeLocal, gradeRemote)
+            .getGrades(studentMock, semesterMock, true).blockingGet()
+
+        assertEquals(0, grades.size)
+    }
 }
diff --git a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/grade/TestGradeEntityCreator.kt b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/grade/TestGradeEntityCreator.kt
index e0fd05a82..9146934bf 100644
--- a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/grade/TestGradeEntityCreator.kt
+++ b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/grade/TestGradeEntityCreator.kt
@@ -1,8 +1,7 @@
 package io.github.wulkanowy.data.repositories.grade
 
-import io.github.wulkanowy.api.toDate
 import org.threeten.bp.LocalDate
-import io.github.wulkanowy.api.grades.Grade as GradeRemote
+import io.github.wulkanowy.sdk.pojo.Grade as GradeRemote
 import io.github.wulkanowy.data.db.entities.Grade as GradeLocal
 
 fun createGradeLocal(value: Int, weight: Double, date: LocalDate, desc: String, semesterId: Int = 1): GradeLocal {
@@ -18,17 +17,25 @@ fun createGradeLocal(value: Int, weight: Double, date: LocalDate, desc: String,
         description = desc,
         entry = "",
         gradeSymbol = "",
-        value = value,
+        value = value.toDouble(),
         weight = "",
         weightValue = weight
     )
 }
 
 fun createGradeApi(value: Int, weight: Double, date: LocalDate, desc: String): GradeRemote {
-    return GradeRemote().apply {
-        this.value = value
-        this.weightValue = weight
-        this.date = date.toDate()
-        this.description = desc
-    }
+    return GradeRemote(
+        subject = "",
+        color = "",
+        comment = "",
+        date = date,
+        description = desc,
+        entry = "",
+        modifier = .0,
+        symbol = "",
+        teacher = "",
+        value = value.toDouble(),
+        weight = weight.toString(),
+        weightValue = weight
+    )
 }
diff --git a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsLocalTest.kt b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsLocalTest.kt
index 0057a26e5..f8aa58158 100644
--- a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsLocalTest.kt
+++ b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsLocalTest.kt
@@ -4,6 +4,7 @@ import androidx.room.Room
 import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import io.github.wulkanowy.data.db.AppDatabase
+import io.github.wulkanowy.data.db.entities.GradePointsStatistics
 import io.github.wulkanowy.data.db.entities.GradeStatistics
 import io.github.wulkanowy.data.db.entities.Semester
 import org.junit.After
@@ -24,7 +25,7 @@ class GradeStatisticsLocalTest {
     fun createDb() {
         testDb = Room.inMemoryDatabaseBuilder(ApplicationProvider.getApplicationContext(), AppDatabase::class.java)
             .build()
-        gradeStatisticsLocal = GradeStatisticsLocal(testDb.gradeStatistics)
+        gradeStatisticsLocal = GradeStatisticsLocal(testDb.gradeStatistics, testDb.gradePointsStatistics)
     }
 
     @After
@@ -63,7 +64,52 @@ class GradeStatisticsLocalTest {
         assertEquals(stats[0].subject, "Wszystkie")
     }
 
+    @Test
+    fun saveAndRead_points() {
+        gradeStatisticsLocal.saveGradesPointsStatistics(listOf(
+            getGradePointsStatistics("Matematyka", 2, 1),
+            getGradePointsStatistics("Chemia", 2, 1),
+            getGradePointsStatistics("Fizyka", 1, 2)
+        ))
+
+        val stats = gradeStatisticsLocal.getGradesPointsStatistics(
+            Semester(2, 2, "", 2019, 1, 2, true, LocalDate.now(), LocalDate.now(), 1, 1),
+            "Matematyka"
+        ).blockingGet()
+        with(stats) {
+            assertEquals(subject, "Matematyka")
+            assertEquals(others, 5.0)
+            assertEquals(student, 5.0)
+        }
+    }
+
+    @Test
+    fun saveAndRead_subjectEmpty() {
+        gradeStatisticsLocal.saveGradesPointsStatistics(listOf())
+
+        val stats = gradeStatisticsLocal.getGradesPointsStatistics(
+            Semester(2, 2, "", 2019, 1, 2, true, LocalDate.now(), LocalDate.now(), 1, 1),
+            "Matematyka"
+        ).blockingGet()
+        assertEquals(null, stats)
+    }
+
+    @Test
+    fun saveAndRead_allEmpty() {
+        gradeStatisticsLocal.saveGradesPointsStatistics(listOf())
+
+        val stats = gradeStatisticsLocal.getGradesPointsStatistics(
+            Semester(2, 2, "", 2019, 1, 2, true, LocalDate.now(), LocalDate.now(), 1, 1),
+            "Wszystkie"
+        ).blockingGet()
+        assertEquals(null, stats)
+    }
+
     private fun getGradeStatistics(subject: String, studentId: Int, semesterId: Int): GradeStatistics {
         return GradeStatistics(studentId, semesterId, subject, 5, 5, false)
     }
+
+    private fun getGradePointsStatistics(subject: String, studentId: Int, semesterId: Int): GradePointsStatistics {
+        return GradePointsStatistics(studentId, semesterId, subject, 5.0, 5.0)
+    }
 }
diff --git a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/recipient/RecipientLocalTest.kt b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/recipient/RecipientLocalTest.kt
index 6edaccdb4..a394927bd 100644
--- a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/recipient/RecipientLocalTest.kt
+++ b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/recipient/RecipientLocalTest.kt
@@ -42,7 +42,7 @@ class RecipientLocalTest {
         ))
 
         val recipients = recipientLocal.getRecipients(
-            Student("fakelog.cf", "AUTO", "", "", "", 1, "", "", "", "", 1, true, LocalDateTime.now()),
+            Student("fakelog.cf", "AUTO", "", "", "", "", false, "", "", "", 1, 0, "", "", "", "", 1, true, LocalDateTime.now()),
             2,
             ReportingUnit(1, 4, "", 0, "", emptyList())
         ).blockingGet()
diff --git a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/student/StudentLocalTest.kt b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/student/StudentLocalTest.kt
index b27446faf..6ae404b2b 100644
--- a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/student/StudentLocalTest.kt
+++ b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/student/StudentLocalTest.kt
@@ -5,7 +5,7 @@ import androidx.room.Room
 import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import io.github.wulkanowy.data.db.AppDatabase
-import io.github.wulkanowy.data.db.SharedPrefHelper
+import io.github.wulkanowy.data.db.SharedPrefProvider
 import io.github.wulkanowy.data.db.entities.Student
 import org.junit.After
 import org.junit.Before
@@ -21,14 +21,14 @@ class StudentLocalTest {
 
     private lateinit var testDb: AppDatabase
 
-    private lateinit var sharedHelper: SharedPrefHelper
+    private lateinit var sharedProvider: SharedPrefProvider
 
     @Before
     fun createDb() {
         val context = ApplicationProvider.getApplicationContext<Context>()
         testDb = Room.inMemoryDatabaseBuilder(context, AppDatabase::class.java)
             .build()
-        sharedHelper = SharedPrefHelper(context.getSharedPreferences("TEST", Context.MODE_PRIVATE))
+        sharedProvider = SharedPrefProvider(context.getSharedPreferences("TEST", Context.MODE_PRIVATE))
         studentLocal = StudentLocal(testDb.studentDao, context)
     }
 
@@ -39,7 +39,7 @@ class StudentLocalTest {
 
     @Test
     fun saveAndReadTest() {
-        studentLocal.saveStudent(Student(email = "test", password = "test123", schoolSymbol = "23", endpoint = "fakelog.cf", loginType = "AUTO", isCurrent = true, studentName = "", schoolName = "", studentId = 0, classId = 1, symbol = "", registrationDate = now(), className = ""))
+        studentLocal.saveStudents(listOf(Student(email = "test", password = "test123", schoolSymbol = "23", scrapperBaseUrl = "fakelog.cf", loginType = "AUTO", isCurrent = true, studentName = "", schoolName = "", studentId = 0, classId = 1, symbol = "", registrationDate = now(), className = "", loginMode = "API", certificateKey = "", privateKey = "", mobileBaseUrl = "", userLoginId = 0, isParent = false)))
             .blockingGet()
 
         val student = studentLocal.getCurrentStudent(true).blockingGet()
diff --git a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TestTimetableEntityCreator.kt b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TestTimetableEntityCreator.kt
index 438e95f48..e2ce2255c 100644
--- a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TestTimetableEntityCreator.kt
+++ b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TestTimetableEntityCreator.kt
@@ -1,13 +1,11 @@
 package io.github.wulkanowy.data.repositories.timetable
 
-import io.github.wulkanowy.api.toDate
-import io.github.wulkanowy.utils.toDate
 import org.threeten.bp.LocalDateTime
 import org.threeten.bp.LocalDateTime.now
-import io.github.wulkanowy.api.timetable.Timetable as TimetableRemote
+import io.github.wulkanowy.sdk.pojo.Timetable as TimetableRemote
 import io.github.wulkanowy.data.db.entities.Timetable as TimetableLocal
 
-fun createTimetableLocal(number: Int, start: LocalDateTime, room: String = "", subject: String = ""): TimetableLocal {
+fun createTimetableLocal(start: LocalDateTime, number: Int, room: String = "", subject: String = "", teacher: String = "", changes: Boolean = false): TimetableLocal {
     return TimetableLocal(
         studentId = 1,
         diaryId = 2,
@@ -20,26 +18,30 @@ fun createTimetableLocal(number: Int, start: LocalDateTime, room: String = "", s
         group = "",
         room = room,
         roomOld = "",
-        teacher = "",
+        teacher = teacher,
         teacherOld = "",
         info = "",
-        changes = false,
+        changes = changes,
         canceled = false
     )
 }
 
-fun createTimetableRemote(number: Int, start: LocalDateTime, room: String, subject: String = ""): TimetableRemote {
+fun createTimetableRemote(start: LocalDateTime, number: Int = 1, room: String = "", subject: String = "", teacher: String = "", changes: Boolean = false): TimetableRemote {
     return TimetableRemote(
         number = number,
-        start = start.toDate(),
-        end = start.plusMinutes(45).toDate(),
-        date = start.toLocalDate().toDate(),
+        start = start,
+        end = start.plusMinutes(45),
+        date = start.toLocalDate(),
         subject = subject,
         group = "",
         room = room,
-        teacher = "",
+        teacher = teacher,
         info = "",
-        changes = false,
-        canceled = false
+        changes = changes,
+        canceled = false,
+        roomOld = "",
+        subjectOld = "",
+        teacherOld = "",
+        studentPlan = true
     )
 }
diff --git a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TimetableLocalTest.kt b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TimetableLocalTest.kt
index fe25e4e96..6406d7435 100644
--- a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TimetableLocalTest.kt
+++ b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TimetableLocalTest.kt
@@ -35,9 +35,9 @@ class TimetableLocalTest {
     @Test
     fun saveAndReadTest() {
         timetableDb.saveTimetable(listOf(
-            createTimetableLocal(1, of(2018, 9, 10, 0, 0, 0)),
-            createTimetableLocal(1, of(2018, 9, 14, 0, 0, 0)),
-            createTimetableLocal(1, of(2018, 9, 17, 0, 0, 0))
+            createTimetableLocal(of(2018, 9, 10, 0, 0, 0), 1),
+            createTimetableLocal(of(2018, 9, 14, 0, 0, 0), 1),
+            createTimetableLocal(of(2018, 9, 17, 0, 0, 0), 1)
         ))
 
         val exams = timetableDb.getTimetable(
diff --git a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TimetableRepositoryTest.kt b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TimetableRepositoryTest.kt
index 1c0802637..565425d43 100644
--- a/app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TimetableRepositoryTest.kt
+++ b/app/src/androidTest/java/io/github/wulkanowy/data/repositories/timetable/TimetableRepositoryTest.kt
@@ -6,14 +6,13 @@ import androidx.test.core.app.ApplicationProvider.getApplicationContext
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.filters.SdkSuppress
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.AppDatabase
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.repositories.TestInternetObservingStrategy
+import io.github.wulkanowy.sdk.Sdk
 import io.mockk.MockKAnnotations
 import io.mockk.every
 import io.mockk.impl.annotations.MockK
-import io.mockk.impl.annotations.SpyK
 import io.reactivex.Single
 import org.junit.After
 import org.junit.Before
@@ -27,8 +26,8 @@ import kotlin.test.assertEquals
 @RunWith(AndroidJUnit4::class)
 class TimetableRepositoryTest {
 
-    @SpyK
-    private var mockApi = Api()
+    @MockK
+    private lateinit var mockSdk: Sdk
 
     private val settings = InternetObservingSettings.builder()
         .strategy(TestInternetObservingStrategy())
@@ -48,10 +47,13 @@ class TimetableRepositoryTest {
         MockKAnnotations.init(this)
         testDb = Room.inMemoryDatabaseBuilder(getApplicationContext(), AppDatabase::class.java).build()
         timetableLocal = TimetableLocal(testDb.timetableDao)
-        timetableRemote = TimetableRemote(mockApi)
+        timetableRemote = TimetableRemote(mockSdk)
 
         every { semesterMock.studentId } returns 1
         every { semesterMock.diaryId } returns 2
+        every { semesterMock.schoolYear } returns 2019
+        every { semesterMock.semesterId } returns 1
+        every { mockSdk.switchDiary(any(), any()) } returns mockSdk
     }
 
     @After
@@ -60,26 +62,86 @@ class TimetableRepositoryTest {
     }
 
     @Test
-    fun copyDetailsToCompletedFromPrevious() {
+    fun copyRoomToCompletedFromPrevious() {
         timetableLocal.saveTimetable(listOf(
-            createTimetableLocal(1, of(2019, 3, 5, 8, 0), "123", "Przyroda"),
-            createTimetableLocal(1, of(2019, 3, 5, 8, 50), "321", "Religia"),
-            createTimetableLocal(1, of(2019, 3, 5, 9, 40), "213", "W-F")
+            createTimetableLocal(of(2019, 3, 5, 8, 0), 1, "123", "Przyroda"),
+            createTimetableLocal(of(2019, 3, 5, 8, 50), 2, "321", "Religia"),
+            createTimetableLocal(of(2019, 3, 5, 9, 40), 3, "213", "W-F"),
+            createTimetableLocal(of(2019, 3, 5, 10, 30),3, "213", "W-F", "Jan Kowalski")
         ))
 
-        every { mockApi.getTimetable(any(), any()) } returns Single.just(listOf(
-            createTimetableRemote(1, of(2019, 3, 5, 8, 0), "", "Przyroda"),
-            createTimetableRemote(1, of(2019, 3, 5, 8, 50), "", "Religia"),
-            createTimetableRemote(1, of(2019, 3, 5, 9, 40), "", "W-F")
+        every { mockSdk.getTimetable(any(), any()) } returns Single.just(listOf(
+            createTimetableRemote(of(2019, 3, 5, 8, 0), 1, "", "Przyroda"),
+            createTimetableRemote(of(2019, 3, 5, 8, 50), 2, "", "Religia"),
+            createTimetableRemote(of(2019, 3, 5, 9, 40), 3, "", "W-F"),
+            createTimetableRemote(of(2019, 3, 5, 10, 30), 4, "", "W-F")
         ))
 
         val lessons = TimetableRepository(settings, timetableLocal, timetableRemote)
             .getTimetable(semesterMock, LocalDate.of(2019, 3, 5), LocalDate.of(2019, 3, 5), true)
             .blockingGet()
 
-        assertEquals(3, lessons.size)
+        assertEquals(4, lessons.size)
         assertEquals("123", lessons[0].room)
         assertEquals("321", lessons[1].room)
         assertEquals("213", lessons[2].room)
     }
+
+    @Test
+    fun copyTeacherToCompletedFromPrevious() {
+        timetableLocal.saveTimetable(listOf(
+            createTimetableLocal(of(2019, 12, 23, 8, 0), 1, "123", "Matematyka", "Paweł Poniedziałkowski", false),
+            createTimetableLocal(of(2019, 12, 23, 8, 50), 2, "124", "Matematyka", "Paweł Poniedziałkowski", false),
+            createTimetableLocal(of(2019, 12, 23, 9, 40), 3, "125", "Język polski", "Joanna Wtorkowska", true),
+            createTimetableLocal(of(2019, 12, 23, 10, 40), 4, "126", "Język polski", "Joanna Wtorkowska", true),
+
+            createTimetableLocal(of(2019, 12, 24, 8, 0), 1, "123", "Język polski", "Joanna Wtorkowska", false),
+            createTimetableLocal(of(2019, 12, 24, 8, 50), 2, "124", "Język polski", "Joanna Wtorkowska", false),
+            createTimetableLocal(of(2019, 12, 24, 9, 40), 3, "125", "Język polski", "Joanna Środowska", true),
+            createTimetableLocal(of(2019, 12, 24, 10, 40), 4, "126", "Język polski", "Joanna Środowska", true),
+
+            createTimetableLocal(of(2019, 12, 25, 8, 0), 1, "123", "Matematyka", "", false),
+            createTimetableLocal(of(2019, 12, 25, 8, 50), 2, "124", "Matematyka", "", false),
+            createTimetableLocal(of(2019, 12, 25, 9, 40), 3, "125", "Matematyka", "", true),
+            createTimetableLocal(of(2019, 12, 25, 10, 40), 4, "126", "Matematyka", "", true)
+        ))
+
+        every { mockSdk.getTimetable(any(), any()) } returns Single.just(listOf(
+            createTimetableRemote(of(2019, 12, 23, 8, 0), 1, "123", "Matematyka", "Paweł Poniedziałkowski", false),
+            createTimetableRemote(of(2019, 12, 23, 8, 50), 2, "124", "Matematyka", "Jakub Wtorkowski", true),
+            createTimetableRemote(of(2019, 12, 23, 9, 40), 3, "125", "Język polski", "Joanna Poniedziałkowska", false),
+            createTimetableRemote(of(2019, 12, 23, 10, 40), 4, "126", "Język polski", "Joanna Wtorkowska", true),
+
+            createTimetableRemote(of(2019, 12, 24, 8, 0), 1, "123", "Język polski", "", false),
+            createTimetableRemote(of(2019, 12, 24, 8, 50), 2, "124", "Język polski", "", true),
+            createTimetableRemote(of(2019, 12, 24, 9, 40), 3, "125", "Język polski", "", false),
+            createTimetableRemote(of(2019, 12, 24, 10, 40), 4, "126", "Język polski", "", true),
+
+            createTimetableRemote(of(2019, 12, 25, 8, 0), 1, "123", "Matematyka", "Paweł Środowski", false),
+            createTimetableRemote(of(2019, 12, 25, 8, 50), 2, "124", "Matematyka", "Paweł Czwartkowski", true),
+            createTimetableRemote(of(2019, 12, 25, 9, 40), 3, "125", "Matematyka", "Paweł Środowski", false),
+            createTimetableRemote(of(2019, 12, 25, 10, 40), 4, "126", "Matematyka", "Paweł Czwartkowski", true)
+        ))
+
+        val lessons = TimetableRepository(settings, timetableLocal, timetableRemote)
+            .getTimetable(semesterMock, LocalDate.of(2019, 12, 23), LocalDate.of(2019, 12, 25), true)
+            .blockingGet()
+
+        assertEquals(12, lessons.size)
+
+        assertEquals("Paweł Poniedziałkowski", lessons[0].teacher)
+        assertEquals("Jakub Wtorkowski", lessons[1].teacher)
+        assertEquals("Joanna Poniedziałkowska", lessons[2].teacher)
+        assertEquals("Joanna Wtorkowska", lessons[3].teacher)
+
+        assertEquals("Joanna Wtorkowska", lessons[4].teacher)
+        assertEquals("", lessons[5].teacher)
+        assertEquals("", lessons[6].teacher)
+        assertEquals("", lessons[7].teacher)
+
+        assertEquals("Paweł Środowski", lessons[8].teacher)
+        assertEquals("Paweł Czwartkowski", lessons[9].teacher)
+        assertEquals("Paweł Środowski", lessons[10].teacher)
+        assertEquals("Paweł Czwartkowski", lessons[11].teacher)
+    }
 }
diff --git a/app/src/debug/res/drawable/ic_launcher_foreground.xml b/app/src/debug/res/drawable/ic_launcher_foreground.xml
deleted file mode 100644
index 6be799094..000000000
--- a/app/src/debug/res/drawable/ic_launcher_foreground.xml
+++ /dev/null
@@ -1,58 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="108dp"
-        android:height="108dp"
-        android:viewportWidth="1926.9231"
-        android:viewportHeight="1926.9231">
-    <group android:translateX="462.46155"
-            android:translateY="462.46155">
-      <path
-          android:pathData="M2000,1440.1V2002H1240.1L238.1,1000v0l-120,-120c0.2,-0.2 -0.7,-1.6 -0.6,-1.8 1.6,-3.1 3.4,-6 5,-9.1 0.4,-0.8 0.6,-1.6 0.6,-2.5 9.2,-15.1 20.2,-28.9 31.4,-42.6 0.1,-0.2 0.3,-0.3 0.4,-0.5 5.1,-6.3 10.3,-12.6 15.3,-18.9 1,-1.2 1.9,-2.4 2.9,-3.7 0.2,-0.2 0.3,-0.4 0.5,-0.6 7.6,-9.7 14.8,-19.7 21.2,-30.2 1,-1.7 2,-3.4 2.9,-5.1 0.1,-0.2 0.2,-0.3 0.3,-0.5 6.2,-11.4 11.3,-23.3 17.7,-34.6 4.5,-8 9.3,-15.9 13.8,-23.9 0.1,-0.2 0.2,-0.3 0.3,-0.5 0.8,-1.5 1.6,-3 2.4,-4.4 0.2,-0.3 0.3,-0.6 0.5,-0.9 2,-3.7 3.8,-7.4 5.6,-11.2 6.2,-13.4 10.2,-27.7 14,-41.9 0,-0.2 0.1,-0.3 0.1,-0.5 0.3,-1 0.5,-2 0.8,-2.9 4,-15.3 7.3,-31.4 13.5,-45.9 1.4,-3.3 3,-6.5 4.6,-9.6 0.1,-0.2 0.2,-0.3 0.3,-0.5 5,-9.7 10.6,-19.1 13.5,-29.7 2.6,-9.2 3.5,-19 3.6,-28.8 0,-0.2 0,-0.3 0,-0.5 0.1,-7.2 -0.1,-14.4 -0.4,-21.3 0.9,-5.6 1.9,-11.3 3,-16.9 0.2,-0.9 0.3,-1.7 0.5,-2.6 1.2,-5.9 2.5,-11.7 4.2,-17.4 0,-0.1 0.1,-0.3 0.1,-0.4 0,-0.2 0.1,-0.3 0.1,-0.5 0.2,-2.1 -0.8,-3.7 -2.4,-4.5l7.7,-7.6c1.2,0.9 2.7,1.3 4.3,0.9 12.8,-3.9 24.9,-9.9 36.3,-16.8 2.8,-1.7 5.6,-3.4 8.3,-5.2 0.2,-0.1 0.3,-0.2 0.5,-0.3 7.7,-4.9 15.2,-10.2 22.1,-16 3.1,-2.7 5.9,-5.6 8.3,-8.9 0.1,-0.2 0.2,-0.3 0.4,-0.5 2.3,-3.4 4.2,-7.2 5.3,-11.4 2.4,-9.2 1.9,-19 1.9,-28.4 0,-0.2 0,-0.4 0,-0.6l5.7,-5.6 -0.3,0.1 4.1,1.3 45.3,45 9.6,9.6 14.3,14.3 100.8,100.8 17.2,17.2 16.3,16.3 30.3,-30.3 -192.9,-191.5c0.5,-0.5 1.1,-1.6 1.4,-2.3 0.3,-0.6 0.5,-1.2 0.4,-1.9 0,-0.8 -0.2,-1.6 -0.6,-2.3 -0.1,-0.3 -0.3,-0.7 -0.4,-1 -0.2,-0.4 -0.5,-0.7 -0.9,-1.1l27.8,-27.8 191.1,-191.1c0.7,0.4 1.5,0.6 2.5,0.7 4.1,0 8.2,0.1 11.9,1.9 0.5,0.3 1.3,0.7 2.1,1.1 1.7,2.3 3.5,4.5 5.7,6.2 2.7,2.1 8.2,3 9.4,0.3z"
-          android:fillColor="#AD2A2A"/>
-      <path
-          android:pathData="m616.3,796.7c0.4,1.2 0.5,2.4 0.5,3.7l-5.8,73.3c-0.4,5.2 -5,9.3 -10.6,9.3h-187.2c-4,0 -7.7,-2.3 -9.5,-5.6l-30.9,-57.4c-0.2,-0.3 -0.3,-0.6 -0.4,-0.9l-29.1,-70.5c-1.1,-2.5 -0.9,-5.4 0.3,-7.8l48.3,-94.5c1.2,-2.3 1.4,-5 0.5,-7.4l-23.6,-65.4c-0.8,-2.3 -0.7,-4.9 0.3,-7.1l39.4,-83.9c4,-8.4 17.1,-7.7 19.9,1.1l12.3,38.2 37.5,100.4c1,2.8 3.4,5 6.4,6l80,27.3c3.1,1.1 5.5,3.4 6.5,6.3z"
-          android:fillColor="#FFFFFF"/>
-      <path
-          android:pathData="m386.7,253.5c0,-22.9 14.5,-42.6 35.3,-51.8 -1.5,-2.5 -2.4,-5.2 -2.4,-8.1 0,-11.1 12.8,-20.1 28.5,-20.1 0.4,0 0.7,0 1.1,0 6.5,-10.8 18.9,-18.1 33.1,-18.1 1,0 2,0 3,0.1 1.3,0.1 2.6,-0.5 3.3,-1.5 10.5,-16 37.1,-27.4 68.2,-27.4 11.5,0 22.4,1.6 32.1,4.3 2.3,-3.8 7.4,-6.4 13.3,-6.4 6.7,0 12.4,3.4 14.1,8.1 8.2,-9.5 22.1,-15.7 37.9,-15.7 25.2,0 45.6,15.9 45.6,35.5 0,2.4 -0.3,4.7 -0.9,7 -0.4,1.6 0.5,3.2 2.2,3.8 16.1,5.9 27,17.1 27,29.9 0,14.6 -14.1,27.1 -34,32 -1.6,0.4 -2.6,1.8 -2.6,3.3 0,0.1 0,0.2 0,0.3 0,11.3 -11.2,20.6 -25.6,21.6 0.1,0.5 0.1,1 0.1,1.6 0,21.7 -41.3,39.2 -92.2,39.2 -11,0 -21.5,-0.8 -31.2,-2.3 0,0.2 0,0.3 0,0.5 0,9 -11.6,16.3 -25.8,16.3 -0.8,0 -1.5,0 -2.2,-0.1 1,2.2 1.5,4.5 1.5,6.9 0,14 -17.7,25.3 -39.6,25.3 -2.4,0 -4.7,-0.1 -7,-0.4 -1.8,-0.2 -3.5,0.9 -3.9,2.6 -1.9,7 -8,12.1 -15.3,12.1 -8.8,0 -15.8,-7.5 -15.8,-16.7 0,-4.3 1.5,-8.2 4,-11.1 0.9,-1 1.2,-2.4 0.6,-3.6 -1.4,-2.6 -2,-5.3 -2,-8.2v0c0,-1.6 -1.3,-2.9 -2.9,-3.3 -27.1,-6 -47.5,-28.6 -47.5,-55.6z"
-          android:fillColor="#FFFFFF"/>
-      <path
-          android:pathData="m870.4,883h-124.4c-3.6,0 -6.9,-1.8 -8.9,-4.6l-83.7,-117.7c-0.5,-0.8 -1,-1.6 -1.3,-2.5l-41.5,-121.2c-0.8,-2.4 -2.7,-4.5 -5.1,-5.7l-101.6,-51.3c-2.8,-1.4 -4.8,-4 -5.4,-6.9l-15,-74.4c-0.2,-1.2 -0.7,-2.4 -1.5,-3.5l-34.5,-50.7c-1.9,-2.8 -2.2,-6.2 -0.8,-9.2l21,-44.9c1.6,-3.4 5.1,-5.7 9.1,-5.9l39,-2.3c2.3,-0.1 4.4,-0.9 6.1,-2.3l28.7,-22.3c5.4,-4.2 13.6,-2.4 16.5,3.5l98.9,201.2c0.4,0.9 0.7,1.8 0.9,2.7l12.2,80.9c0.3,1.9 1.1,3.6 2.4,5l197,215.6c5.8,6.4 0.9,16.5 -8.1,16.5z"
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-          android:pathData="m335.8,838.9c0.8,2.6 0.4,5.4 -1,7.7l-19.3,31.3c-1.9,3.1 -5.4,5.1 -9.2,5.1h-180.6c-8.4,0 -13.5,-8.8 -9,-15.4l116.3,-171.3c0.7,-1 1.1,-2.1 1.4,-3.2l53.3,-227.6c0.6,-2.7 2.4,-5 5,-6.4l72.2,-39.6c2.6,-1.4 4.4,-3.7 5,-6.5l9.7,-42.3c2,-8.8 14.6,-10.7 19.6,-3l3.5,5.6c1.5,2.4 1.9,5.4 0.9,8.1l-65.8,190.2c-0.5,1.5 -0.7,3.1 -0.4,4.7l16.4,91c0.3,1.8 0.1,3.7 -0.7,5.4l-39.1,87.8c-0.9,2.1 -1.1,4.4 -0.4,6.5z"
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-          android:strokeLineJoin="round"
-          android:strokeWidth="4"
-          android:fillColor="#3f3f3f"
-          android:strokeColor="#00000000"
-          android:fillType="nonZero"
-          android:fillAlpha="1"
-          android:strokeLineCap="square"/>
-      <path
-          android:pathData="m728.71,710.91l0,19.89l-88.7,0l0,59.3l77.04,0L717.05,810l-77.04,0l0,65.39l89.84,0l0,19.9L616.56,895.29L616.56,791.16l-52.35,-52.35 -0.77,-0.18c5.41,6.64 9.65,14.32 12.69,23.09 3.72,10.39 5.62,21.92 5.7,34.6L581.84,809.87c-0.08,12.67 -1.98,24.25 -5.7,34.72 -3.63,10.39 -8.95,19.35 -15.97,26.87 -6.93,7.43 -15.46,13.26 -25.6,17.49 -7.54,3.1 -15.86,5.07 -24.97,5.89 -3.04,0.27 -6.16,0.42 -9.37,0.45L457.53,895.29l0,-6.55l-0.37,6.82 53.8,53.45l415.85,0c0.24,0 0.47,-0.02 0.69,-0.05L1132.91,948.97L953.5,769.55l-58.39,-58.39 -0.28,0.06 -58.03,184.06l-20.4,0l-44.66,-141.34zM783.29,711.07 L826.41,857.52 850.08,777.86zM509.6,711.29c1.52,0.15 3.01,0.33 4.49,0.54 -1.47,-0.21 -2.97,-0.39 -4.49,-0.54zM481.35,730.04l0,146.11l18.88,0c9.97,-0.08 18.59,-1.81 25.85,-5.19 7.27,-3.46 13.26,-8.15 17.99,-14.07 4.82,-5.91 8.36,-12.88 10.64,-20.91 2.37,-8.03 3.59,-16.73 3.68,-26.11l0,-13.81c-0.08,-9.38 -1.31,-18.04 -3.68,-25.98 -2.37,-8.03 -5.91,-14.95 -10.64,-20.78 -4.73,-5.91 -10.73,-10.56 -17.99,-13.94 -7.27,-3.38 -15.88,-5.15 -25.85,-5.32zM560.17,734.86c0.65,0.69 1.26,1.4 1.88,2.11 -0.61,-0.72 -1.23,-1.42 -1.88,-2.11z"
-          android:strokeAlpha="1"
-          android:strokeLineJoin="miter"
-          android:strokeWidth="1.94642854"
-          android:fillColor="#000000"
-          android:strokeColor="#00000000"
-          android:fillAlpha="0.18431373"
-          android:strokeLineCap="butt"/>
-      <path
-          android:pathData="m457.53,895.28l0,-184.51l42.7,0q19.26,0.25 34.34,6.59 15.21,6.21 25.6,17.49 10.52,11.15 15.97,26.86 5.58,15.59 5.7,34.59l0,13.56q-0.13,19.01 -5.7,34.72 -5.45,15.59 -15.97,26.86 -10.39,11.15 -25.6,17.49 -15.08,6.21 -34.34,6.34zM481.35,730.04l0,146.11l18.88,0q14.95,-0.13 25.85,-5.2 10.9,-5.2 17.99,-14.07 7.22,-8.87 10.64,-20.91 3.55,-12.04 3.67,-26.1l0,-13.81q-0.13,-14.07 -3.67,-25.98 -3.55,-12.04 -10.64,-20.78 -7.1,-8.87 -17.99,-13.94 -10.9,-5.07 -25.85,-5.32z"
-          android:fillColor="#ffffff"
-          android:strokeColor="#00000000"
-          android:fillAlpha="1"/>
-      <path
-          android:pathData="M717.05,810L640.01,810l0,65.39l89.84,0l0,19.9l-113.29,0l0,-184.51l112.15,0l0,20.02L640.01,730.8l0,59.31l77.05,0z"
-          android:fillColor="#ffffff"
-          android:strokeColor="#00000000"
-          android:fillAlpha="1"/>
-      <path
-          android:pathData="m826.41,857.52 l43.59,-146.74l24.96,0l-58.16,184.51L816.4,895.28l-58.29,-184.51l25.09,0z"
-          android:fillColor="#ffffff"
-          android:strokeColor="#00000000"
-          android:fillAlpha="1"/>
-    </group>
-</vector>
diff --git a/app/src/debug/res/drawable/ic_launcher_foreground_dev.xml b/app/src/debug/res/drawable/ic_launcher_foreground_dev.xml
new file mode 100644
index 000000000..799ea0374
--- /dev/null
+++ b/app/src/debug/res/drawable/ic_launcher_foreground_dev.xml
@@ -0,0 +1,34 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="1926"
+    android:viewportHeight="1926">
+    <path
+        android:fillColor="#ad2a2a"
+        android:pathData="M2465,1904v561h-759L704,1463l-120,-120 -1,-1 5,-9 1,-3c9,-15 20,-29 31,-43l16,-19 3,-4 21,-30 3,-6c7,-11 12,-23 18,-35l14,-24 3,-4v-1a234,234 0,0 0,20 -53v-1l1,-3c4,-15 7,-31 13,-46l5,-9v-1c5,-10 11,-19 14, -30 2,-9 3,-19 3,-28v-1,-21l3,-17v-3l4,-17h1v-1c0,-2 -1,-4 -3,-4l8,-8 4,1c13,-4 25,-10 37,-17l8,-5 22,-16 9,-9v-1l5, -11c3,-9 2,-19 2,-29l6,-6 4,2 45,45 10,9 14,14 101,101 17,17 16,17 31,-31 -193,-191 1,-2 1,-2 -1,-3v-1l-1,-1 27,-27 192,-192 2,1a27,27 0,0 1,14 3l6,6c2,2 8,3 9,1l1310,1310z" />
+    <path
+        android:fillColor="#fff"
+        android:pathData="M1082,1260v4l-6,73c0,5 -5,9 -10,9H879c-4,0 -8,-2 -10,-5l-31,-58 -29,-71v-8l48,-94c2,-3 2,-5 1, -8l-24,-65c-1,-2 0,-5 1,-7l39,-84c4,-8 17,-8 20,1l12,38 38,101c1,2 3,5 6,6l80,27c3,1 6,3 7,6l45,135zM852,717c0,-23 15,-43 35,-52l-2,-8c0,-11 13,-20 29,-20h1a38,38 0,0 1,36 -18l3,-2c11,-16 37,-27 68,-27 12,0 23,2 32,4 3,-3 8,-6 14,-6s12,3 14,8c8,-9 22,-16 38,-16 25,0 45,16 45,36l-1,7 3,4c16,6 27,17 27,30 0,14 -15,27 -34,32 -2,0 -3,1 -3,3 0,11 -11,21 -26,22v1c0,22 -41,40 -92,40 -11,0 -21,-1 -31,-3v1c0,9 -12,16 -26,16h-2l2,7c0,14 -18,25 -40,25h-7l-4, 2c-2,7 -8,12 -15,12 -9,0 -16,-7 -16,-16 0,-5 1,-8 4,-11l1,-4c-2,-3 -2,-5 -2,-8 0,-2 -2,-3 -3,-3 -27,-6 -48,-29 -48,-56z" />
+    <path
+        android:fillColor="#fff"
+        android:pathData="M1336,1346h-125c-3,0 -6,-1 -8,-4l-84,-118 -1,-2 -42,-122 -5,-5 -102,-52 -5,-6 -15,-75 -2,-3 -34,-51c-2,-3 -2,-6 -1,-9l21,-45c2,-4 5,-6 9,-6l39,-2c3,0 5,-1 6,-3l29,-22c5,-4 14,-2 17,4l98,201 1,2 13,81 2,5 197,216c6,6 1,16 -8,16zM801,1302c1,3 1,6 -1,8l-19,31c-2,3 -5,5 -9,5H591c-8,0 -13,-8 -9,-15l116,-171 2,-3 53, -228c1,-3 3,-5 5,-6l72,-40c3,-1 5,-4 5,-7l10,-42c2,-9 15,-11 20,-3l3,6c2,2 2,5 1,8l-66,190v5l16,91v5l-40,88v6l22,72z" />
+    <path
+        android:fillColor="#3f3f3f"
+        android:pathData="M886.7,1119.5h1580.5c0.6,0 0,292 0,292H886.7a19.4,19.4 0,0 1,-19.5 -19.5v-253c0,-10.8 8.7,-19.5 19.5,-19.5z"
+        android:strokeWidth="4"
+        android:strokeAlpha=".5"
+        android:strokeColor="#000"
+        android:strokeLineCap="square"
+        android:strokeLineJoin="round" />
+    <path
+        android:fillAlpha=".2"
+        android:fillColor="#000"
+        android:pathData="M1191.2,1173.4v19.9h-88.7v59.3h77v19.9h-77v65.4h89.8v19.9L1079,1357.8v-104.2l-52.3,-52.3 -0.8, -0.2a75.1,75.1 0,0 1,12.7 23,104 104,0 0,1 5.7,34.7v13.5c0,12.7 -2,24.3 -5.7,34.8a72.8,72.8 0,0 1,-41.6 44.4,85.5 85.5,0 0,1 -34.3,6.3L920,1357.8v-6.6l-0.4,6.8 53.8,53.5h622L1416,1232l-58.4,-58.4h-0.3l-58,184.1h -20.4l-44.7,-141.3zM1245.8,1173.5l43,146.5 23.7,-79.7zM972.1,1173.8zM943.8,1192.5v146.1h18.9a62,62 0,0 0,25.8 -5.2,50.3 50.3,0 0,0 18,-14c4.9,-6 8.4,-13 10.7,-21 2.3,-8 3.6,-16.7 3.7,-26v-13.9c-0.1,-9.4 -1.4,-18 -3.7,-26 -2.4,-8 -6,-15 -10.7,-20.7a49.3,49.3 0,0 0,-18 -14,63.4 63.4,0 0,0 -25.8,-5.3zM1022.6,1197.3l2,2.1 -2,-2z"
+        android:strokeWidth="1.9"
+        android:strokeColor="#000" />
+    <path
+        android:fillColor="#fff"
+        android:pathData="M920,1357.7v-184.5h42.7q19.3,0.3 34.3,6.6 15.2,6.2 25.6,17.5 10.6,11.2 16,26.9 5.6,15.6 5.7, 34.6v13.5q-0.1,19 -5.7,34.7 -5.4,15.6 -16,26.9 -10.4,11.2 -25.6,17.5 -15,6.2 -34.3,6.3zM943.8,1192.5v146.1h18.9q15, -0.1 25.8,-5.2 11,-5.2 18,-14 7.3,-9 10.7,-21 3.5,-12 3.6,-26v-13.9q0,-14 -3.6,-26t-10.7,-20.7q-7,-9 -18,-14 -10.9,-5 -25.8,-5.3zM1179.5,1272.5h-77v65.4h89.8v19.9L1079,1357.8v-184.6h112.2v20h-88.7v59.4h77zM1288.9, 1320l43.6,-146.8h25l-58.2,184.6h-20.4l-58.3,-184.6h25z"
+        android:strokeWidth="1"
+        android:strokeColor="#000" />
+</vector>
diff --git a/app/src/debug/res/mipmap-anydpi-v26/ic_launcher.xml b/app/src/debug/res/mipmap-anydpi-v26/ic_launcher.xml
index 7353dbd1f..7dbec2cb9 100644
--- a/app/src/debug/res/mipmap-anydpi-v26/ic_launcher.xml
+++ b/app/src/debug/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@color/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+    <background android:drawable="@color/colorPrimary" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground_dev" />
 </adaptive-icon>
\ No newline at end of file
diff --git a/app/src/debug/res/mipmap-anydpi-v26/ic_launcher_round.xml b/app/src/debug/res/mipmap-anydpi-v26/ic_launcher_round.xml
index 7353dbd1f..7dbec2cb9 100644
--- a/app/src/debug/res/mipmap-anydpi-v26/ic_launcher_round.xml
+++ b/app/src/debug/res/mipmap-anydpi-v26/ic_launcher_round.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@color/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+    <background android:drawable="@color/colorPrimary" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground_dev" />
 </adaptive-icon>
\ No newline at end of file
diff --git a/app/src/debug/res/values-pl/strings.xml b/app/src/debug/res/values-pl/strings.xml
deleted file mode 100644
index c90641ddb..000000000
--- a/app/src/debug/res/values-pl/strings.xml
+++ /dev/null
@@ -1,3 +0,0 @@
-<resources>
-    <string name="app_name">Wulkanowy DEV</string>
-</resources>
diff --git a/app/src/debug/res/values/ic_launcher_background.xml b/app/src/debug/res/values/ic_launcher_background.xml
deleted file mode 100644
index 9646c0b4e..000000000
--- a/app/src/debug/res/values/ic_launcher_background.xml
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <color name="ic_launcher_background">#D32F2F</color>
-</resources>
\ No newline at end of file
diff --git a/app/src/fdroid/java/io/github/wulkanowy/utils/CrashlyticsUtils.kt b/app/src/fdroid/java/io/github/wulkanowy/utils/CrashlyticsUtils.kt
new file mode 100644
index 000000000..be4c0ebeb
--- /dev/null
+++ b/app/src/fdroid/java/io/github/wulkanowy/utils/CrashlyticsUtils.kt
@@ -0,0 +1,17 @@
+@file:Suppress("UNUSED_PARAMETER")
+
+package io.github.wulkanowy.utils
+
+import android.content.Context
+import timber.log.Timber
+
+fun initCrashlytics(context: Context, appInfo: AppInfo) {
+    // do nothing
+}
+
+class CrashlyticsTree : Timber.Tree() {
+
+    override fun log(priority: Int, tag: String?, message: String, t: Throwable?) {
+        // do nothing
+    }
+}
diff --git a/app/src/fdroid/java/io/github/wulkanowy/utils/FirebaseAnalyticsHelper.kt b/app/src/fdroid/java/io/github/wulkanowy/utils/FirebaseAnalyticsHelper.kt
new file mode 100644
index 000000000..0b1274f15
--- /dev/null
+++ b/app/src/fdroid/java/io/github/wulkanowy/utils/FirebaseAnalyticsHelper.kt
@@ -0,0 +1,13 @@
+package io.github.wulkanowy.utils
+
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class FirebaseAnalyticsHelper @Inject constructor() {
+
+    @Suppress("UNUSED_PARAMETER")
+    fun logEvent(name: String, vararg params: Pair<String, Any?>) {
+        // do nothing
+    }
+}
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 0c6edab46..c644c8633 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -4,8 +4,6 @@
     package="io.github.wulkanowy"
     android:installLocation="internalOnly">
 
-    <uses-sdk tools:overrideLibrary="com.readystatesoftware.chuck" />
-
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
@@ -34,6 +32,7 @@
             android:name=".ui.modules.login.LoginActivity"
             android:configChanges="orientation|screenSize"
             android:label="@string/login_title"
+            android:theme="@style/WulkanowyTheme.NoActionBar"
             android:windowSoftInputMode="adjustResize" />
         <activity
             android:name=".ui.modules.main.MainActivity"
@@ -44,14 +43,33 @@
             android:name=".ui.modules.message.send.SendMessageActivity"
             android:configChanges="orientation|screenSize"
             android:label="@string/send_message_title"
+            android:windowSoftInputMode="adjustResize"
             android:theme="@style/WulkanowyTheme.NoActionBar" />
+        <activity
+            android:name=".ui.modules.timetablewidget.TimetableWidgetConfigureActivity"
+            android:excludeFromRecents="true"
+            android:noHistory="true"
+            android:theme="@style/WulkanowyTheme.WidgetAccountSwitcher">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".ui.modules.luckynumberwidget.LuckyNumberWidgetConfigureActivity"
+            android:excludeFromRecents="true"
+            android:noHistory="true"
+            android:theme="@style/WulkanowyTheme.WidgetAccountSwitcher">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
+            </intent-filter>
+        </activity>
 
         <service
             android:name=".services.widgets.TimetableWidgetService"
             android:permission="android.permission.BIND_REMOTEVIEWS" />
 
         <receiver
-            android:name=".ui.widgets.timetable.TimetableWidgetProvider"
+            android:name=".ui.modules.timetablewidget.TimetableWidgetProvider"
             android:exported="true"
             android:label="@string/timetable_title">
             <intent-filter>
@@ -61,6 +79,16 @@
                 android:name="android.appwidget.provider"
                 android:resource="@xml/provider_widget_timetable" />
         </receiver>
+        <receiver
+            android:name=".ui.modules.luckynumberwidget.LuckyNumberWidgetProvider"
+            android:label="@string/lucky_number_title">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/provider_widget_lucky_number" />
+        </receiver>
 
         <provider
             android:name="androidx.work.impl.WorkManagerInitializer"
diff --git a/app/src/main/java/io/github/wulkanowy/WulkanowyApp.kt b/app/src/main/java/io/github/wulkanowy/WulkanowyApp.kt
index e427647f6..90b3581c8 100644
--- a/app/src/main/java/io/github/wulkanowy/WulkanowyApp.kt
+++ b/app/src/main/java/io/github/wulkanowy/WulkanowyApp.kt
@@ -1,39 +1,41 @@
 package io.github.wulkanowy
 
 import android.content.Context
-import androidx.appcompat.app.AppCompatDelegate
+import android.util.Log.INFO
+import android.util.Log.VERBOSE
 import androidx.multidex.MultiDex
 import androidx.work.Configuration
-import androidx.work.WorkManager
-import com.crashlytics.android.Crashlytics
-import com.crashlytics.android.core.CrashlyticsCore
 import com.jakewharton.threetenabp.AndroidThreeTen
+import com.yariksoffice.lingver.Lingver
 import dagger.android.AndroidInjector
 import dagger.android.support.DaggerApplication
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.utils.Log
-import io.fabric.sdk.android.Fabric
-import io.github.wulkanowy.BuildConfig.DEBUG
-import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.di.DaggerAppComponent
 import io.github.wulkanowy.services.sync.SyncWorkerFactory
+import io.github.wulkanowy.ui.base.ThemeManager
+import io.github.wulkanowy.utils.ActivityLifecycleLogger
+import io.github.wulkanowy.utils.AppInfo
 import io.github.wulkanowy.utils.CrashlyticsTree
 import io.github.wulkanowy.utils.DebugLogTree
+import io.github.wulkanowy.utils.initCrashlytics
 import io.reactivex.exceptions.UndeliverableException
 import io.reactivex.plugins.RxJavaPlugins
 import timber.log.Timber
 import java.io.IOException
-import java.lang.Exception
 import javax.inject.Inject
 
-class WulkanowyApp : DaggerApplication() {
-
-    @Inject
-    lateinit var prefRepository: PreferencesRepository
+class WulkanowyApp : DaggerApplication(), Configuration.Provider {
 
     @Inject
     lateinit var workerFactory: SyncWorkerFactory
 
+    @Inject
+    lateinit var themeManager: ThemeManager
+
+    @Inject
+    lateinit var appInfo: AppInfo
+
     override fun attachBaseContext(base: Context?) {
         super.attachBaseContext(base)
         MultiDex.install(this)
@@ -42,32 +44,38 @@ class WulkanowyApp : DaggerApplication() {
     override fun onCreate() {
         super.onCreate()
         AndroidThreeTen.init(this)
-        initializeFabric()
-        if (DEBUG) enableDebugLog()
-        AppCompatDelegate.setDefaultNightMode(prefRepository.currentTheme)
-        WorkManager.initialize(this, Configuration.Builder().setWorkerFactory(workerFactory).build())
         RxJavaPlugins.setErrorHandler(::onError)
+        Lingver.init(this)
+        themeManager.applyDefaultTheme()
+
+        initLogging()
+        initCrashlytics(this, appInfo)
     }
 
-    private fun enableDebugLog() {
-        Timber.plant(DebugLogTree())
-        FlexibleAdapter.enableLogs(Log.Level.DEBUG)
+    private fun initLogging() {
+        if (appInfo.isDebug) {
+            Timber.plant(DebugLogTree())
+            FlexibleAdapter.enableLogs(Log.Level.DEBUG)
+        } else {
+            Timber.plant(CrashlyticsTree())
+        }
+        registerActivityLifecycleCallbacks(ActivityLifecycleLogger())
     }
 
-    private fun initializeFabric() {
-        Fabric.with(Fabric.Builder(this).kits(
-            Crashlytics.Builder().core(CrashlyticsCore.Builder().disabled(!BuildConfig.CRASHLYTICS_ENABLED).build()).build()
-        ).debuggable(BuildConfig.DEBUG).build())
-        Timber.plant(CrashlyticsTree())
-    }
-
-    private fun onError(t: Throwable) {
-        if (t is UndeliverableException && t.cause is IOException || t.cause is InterruptedException) {
-            Timber.e(t.cause, "An undeliverable error occurred")
-        } else throw t
+    private fun onError(error: Throwable) {
+        //RxJava's too deep stack traces may cause SOE on older android devices
+        val cause = error.cause
+        if (error is UndeliverableException && cause is IOException || cause is InterruptedException || cause is StackOverflowError) {
+            Timber.e(cause, "An undeliverable error occurred")
+        } else throw error
     }
 
     override fun applicationInjector(): AndroidInjector<out DaggerApplication> {
-        return DaggerAppComponent.builder().create(this)
+        return DaggerAppComponent.factory().create(this)
     }
+
+    override fun getWorkManagerConfiguration() = Configuration.Builder()
+        .setWorkerFactory(workerFactory)
+        .setMinimumLoggingLevel(if (appInfo.isDebug) VERBOSE else INFO)
+        .build()
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/ApiHelper.kt b/app/src/main/java/io/github/wulkanowy/data/ApiHelper.kt
deleted file mode 100644
index b6eee316b..000000000
--- a/app/src/main/java/io/github/wulkanowy/data/ApiHelper.kt
+++ /dev/null
@@ -1,35 +0,0 @@
-package io.github.wulkanowy.data
-
-import io.github.wulkanowy.api.Api
-import io.github.wulkanowy.data.db.entities.Student
-import java.net.URL
-import javax.inject.Inject
-
-class ApiHelper @Inject constructor(private val api: Api) {
-
-    fun initApi(student: Student) {
-        api.apply {
-            email = student.email
-            password = student.password
-            symbol = student.symbol
-            schoolSymbol = student.schoolSymbol
-            studentId = student.studentId
-            classId = student.classId
-            host = URL(student.endpoint).run { host + ":$port".removeSuffix(":-1") }
-            ssl = student.endpoint.startsWith("https")
-            loginType = Api.LoginType.valueOf(student.loginType)
-            useNewStudent = true
-        }
-    }
-
-    fun initApi(email: String, password: String, symbol: String, endpoint: String) {
-        api.apply {
-            this.email = email
-            this.password = password
-            this.symbol = symbol
-            host = URL(endpoint).run { host + ":$port".removeSuffix(":-1") }
-            ssl = endpoint.startsWith("https")
-            useNewStudent = true
-        }
-    }
-}
diff --git a/app/src/main/java/io/github/wulkanowy/data/RepositoryModule.kt b/app/src/main/java/io/github/wulkanowy/data/RepositoryModule.kt
index c832368a5..1bc4eb616 100644
--- a/app/src/main/java/io/github/wulkanowy/data/RepositoryModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/RepositoryModule.kt
@@ -11,12 +11,10 @@ import com.readystatesoftware.chuck.api.ChuckInterceptor
 import com.readystatesoftware.chuck.api.RetentionManager
 import dagger.Module
 import dagger.Provides
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.AppDatabase
+import io.github.wulkanowy.data.db.SharedPrefProvider
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
-import okhttp3.logging.HttpLoggingInterceptor
-import okhttp3.logging.HttpLoggingInterceptor.Level.BASIC
-import okhttp3.logging.HttpLoggingInterceptor.Level.NONE
+import io.github.wulkanowy.sdk.Sdk
 import timber.log.Timber
 import javax.inject.Singleton
 
@@ -33,15 +31,14 @@ internal class RepositoryModule {
 
     @Singleton
     @Provides
-    fun provideApi(chuckCollector: ChuckCollector, context: Context): Api {
-        return Api().apply {
-            logLevel = NONE
+    fun provideSdk(chuckCollector: ChuckCollector, context: Context): Sdk {
+        return Sdk().apply {
             androidVersion = android.os.Build.VERSION.RELEASE
             buildTag = android.os.Build.MODEL
-            setInterceptor(HttpLoggingInterceptor(HttpLoggingInterceptor.Logger { Timber.d(it) }).setLevel(BASIC))
+            setSimpleHttpLogger { Timber.d(it) }
 
             // for debug only
-            setInterceptor(ChuckInterceptor(context, chuckCollector).maxContentLength(250000L), true, 0)
+            addInterceptor(ChuckInterceptor(context, chuckCollector).maxContentLength(250000L), true)
         }
     }
 
@@ -55,7 +52,7 @@ internal class RepositoryModule {
 
     @Singleton
     @Provides
-    fun provideDatabase(context: Context) = AppDatabase.newInstance(context)
+    fun provideDatabase(context: Context, sharedPrefProvider: SharedPrefProvider) = AppDatabase.newInstance(context, sharedPrefProvider)
 
     @Singleton
     @Provides
@@ -85,6 +82,10 @@ internal class RepositoryModule {
     @Provides
     fun provideGradeStatisticsDao(database: AppDatabase) = database.gradeStatistics
 
+    @Singleton
+    @Provides
+    fun provideGradePointsStatisticsDao(database: AppDatabase) = database.gradePointsStatistics
+
     @Singleton
     @Provides
     fun provideMessagesDao(database: AppDatabase) = database.messagesDao
@@ -132,4 +133,16 @@ internal class RepositoryModule {
     @Singleton
     @Provides
     fun provideRecipientDao(database: AppDatabase) = database.recipientDao
+
+    @Singleton
+    @Provides
+    fun provideMobileDevicesDao(database: AppDatabase) = database.mobileDeviceDao
+
+    @Singleton
+    @Provides
+    fun provideTeacherDao(database: AppDatabase) = database.teacherDao
+
+    @Singleton
+    @Provides
+    fun provideSchoolInfoDao(database: AppDatabase) = database.schoolDao
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/SdkHelper.kt b/app/src/main/java/io/github/wulkanowy/data/SdkHelper.kt
new file mode 100644
index 000000000..901712594
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/SdkHelper.kt
@@ -0,0 +1,30 @@
+package io.github.wulkanowy.data
+
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.sdk.Sdk
+import javax.inject.Inject
+
+class SdkHelper @Inject constructor(private val sdk: Sdk) {
+
+    fun init(student: Student) {
+        sdk.apply {
+            email = student.email
+            password = student.password
+            symbol = student.symbol
+            schoolSymbol = student.schoolSymbol
+            studentId = student.studentId
+            classId = student.classId
+
+            if (Sdk.Mode.valueOf(student.loginMode) != Sdk.Mode.API) {
+                scrapperBaseUrl = student.scrapperBaseUrl
+                loginType = Sdk.ScrapperLoginType.valueOf(student.loginType)
+            }
+            loginId = student.userLoginId
+
+            mode = Sdk.Mode.valueOf(student.loginMode)
+            mobileBaseUrl = student.mobileBaseUrl
+            certKey = student.certificateKey
+            privateKey = student.privateKey
+        }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/AppDatabase.kt b/app/src/main/java/io/github/wulkanowy/data/db/AppDatabase.kt
index d867583e4..9ee1b263d 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/AppDatabase.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/AppDatabase.kt
@@ -6,44 +6,59 @@ import androidx.room.Room
 import androidx.room.RoomDatabase
 import androidx.room.RoomDatabase.JournalMode.TRUNCATE
 import androidx.room.TypeConverters
+import androidx.room.migration.Migration
 import io.github.wulkanowy.data.db.dao.AttendanceDao
 import io.github.wulkanowy.data.db.dao.AttendanceSummaryDao
 import io.github.wulkanowy.data.db.dao.CompletedLessonsDao
 import io.github.wulkanowy.data.db.dao.ExamDao
 import io.github.wulkanowy.data.db.dao.GradeDao
+import io.github.wulkanowy.data.db.dao.GradePointsStatisticsDao
 import io.github.wulkanowy.data.db.dao.GradeStatisticsDao
 import io.github.wulkanowy.data.db.dao.GradeSummaryDao
 import io.github.wulkanowy.data.db.dao.HomeworkDao
 import io.github.wulkanowy.data.db.dao.LuckyNumberDao
 import io.github.wulkanowy.data.db.dao.MessagesDao
+import io.github.wulkanowy.data.db.dao.MobileDeviceDao
 import io.github.wulkanowy.data.db.dao.NoteDao
 import io.github.wulkanowy.data.db.dao.RecipientDao
 import io.github.wulkanowy.data.db.dao.ReportingUnitDao
+import io.github.wulkanowy.data.db.dao.SchoolDao
 import io.github.wulkanowy.data.db.dao.SemesterDao
 import io.github.wulkanowy.data.db.dao.StudentDao
 import io.github.wulkanowy.data.db.dao.SubjectDao
+import io.github.wulkanowy.data.db.dao.TeacherDao
 import io.github.wulkanowy.data.db.dao.TimetableDao
 import io.github.wulkanowy.data.db.entities.Attendance
 import io.github.wulkanowy.data.db.entities.AttendanceSummary
 import io.github.wulkanowy.data.db.entities.CompletedLesson
 import io.github.wulkanowy.data.db.entities.Exam
 import io.github.wulkanowy.data.db.entities.Grade
+import io.github.wulkanowy.data.db.entities.GradePointsStatistics
 import io.github.wulkanowy.data.db.entities.GradeStatistics
 import io.github.wulkanowy.data.db.entities.GradeSummary
 import io.github.wulkanowy.data.db.entities.Homework
 import io.github.wulkanowy.data.db.entities.LuckyNumber
 import io.github.wulkanowy.data.db.entities.Message
+import io.github.wulkanowy.data.db.entities.MobileDevice
 import io.github.wulkanowy.data.db.entities.Note
 import io.github.wulkanowy.data.db.entities.Recipient
 import io.github.wulkanowy.data.db.entities.ReportingUnit
+import io.github.wulkanowy.data.db.entities.School
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.db.entities.Subject
+import io.github.wulkanowy.data.db.entities.Teacher
 import io.github.wulkanowy.data.db.entities.Timetable
 import io.github.wulkanowy.data.db.migrations.Migration10
 import io.github.wulkanowy.data.db.migrations.Migration11
 import io.github.wulkanowy.data.db.migrations.Migration12
 import io.github.wulkanowy.data.db.migrations.Migration13
+import io.github.wulkanowy.data.db.migrations.Migration14
+import io.github.wulkanowy.data.db.migrations.Migration15
+import io.github.wulkanowy.data.db.migrations.Migration16
+import io.github.wulkanowy.data.db.migrations.Migration17
+import io.github.wulkanowy.data.db.migrations.Migration18
+import io.github.wulkanowy.data.db.migrations.Migration19
 import io.github.wulkanowy.data.db.migrations.Migration2
 import io.github.wulkanowy.data.db.migrations.Migration3
 import io.github.wulkanowy.data.db.migrations.Migration4
@@ -66,6 +81,7 @@ import javax.inject.Singleton
         Grade::class,
         GradeSummary::class,
         GradeStatistics::class,
+        GradePointsStatistics::class,
         Message::class,
         Note::class,
         Homework::class,
@@ -73,7 +89,10 @@ import javax.inject.Singleton
         LuckyNumber::class,
         CompletedLesson::class,
         ReportingUnit::class,
-        Recipient::class
+        Recipient::class,
+        MobileDevice::class,
+        Teacher::class,
+        School::class
     ],
     version = AppDatabase.VERSION_SCHEMA,
     exportSchema = true
@@ -82,27 +101,37 @@ import javax.inject.Singleton
 abstract class AppDatabase : RoomDatabase() {
 
     companion object {
-        const val VERSION_SCHEMA = 13
+        const val VERSION_SCHEMA = 19
 
-        fun newInstance(context: Context): AppDatabase {
+        fun getMigrations(sharedPrefProvider: SharedPrefProvider): Array<Migration> {
+            return arrayOf(
+                Migration2(),
+                Migration3(),
+                Migration4(),
+                Migration5(),
+                Migration6(),
+                Migration7(),
+                Migration8(),
+                Migration9(),
+                Migration10(),
+                Migration11(),
+                Migration12(),
+                Migration13(),
+                Migration14(),
+                Migration15(),
+                Migration16(),
+                Migration17(),
+                Migration18(),
+                Migration19(sharedPrefProvider)
+            )
+        }
+
+        fun newInstance(context: Context, sharedPrefProvider: SharedPrefProvider): AppDatabase {
             return Room.databaseBuilder(context, AppDatabase::class.java, "wulkanowy_database")
                 .setJournalMode(TRUNCATE)
                 .fallbackToDestructiveMigrationFrom(VERSION_SCHEMA + 1)
                 .fallbackToDestructiveMigrationOnDowngrade()
-                .addMigrations(
-                    Migration2(),
-                    Migration3(),
-                    Migration4(),
-                    Migration5(),
-                    Migration6(),
-                    Migration7(),
-                    Migration8(),
-                    Migration9(),
-                    Migration10(),
-                    Migration11(),
-                    Migration12(),
-                    Migration13()
-                )
+                .addMigrations(*getMigrations(sharedPrefProvider))
                 .build()
         }
     }
@@ -125,6 +154,8 @@ abstract class AppDatabase : RoomDatabase() {
 
     abstract val gradeStatistics: GradeStatisticsDao
 
+    abstract val gradePointsStatistics: GradePointsStatisticsDao
+
     abstract val messagesDao: MessagesDao
 
     abstract val noteDao: NoteDao
@@ -140,4 +171,10 @@ abstract class AppDatabase : RoomDatabase() {
     abstract val reportingUnitDao: ReportingUnitDao
 
     abstract val recipientDao: RecipientDao
+
+    abstract val mobileDeviceDao: MobileDeviceDao
+
+    abstract val teacherDao: TeacherDao
+
+    abstract val schoolDao: SchoolDao
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/SharedPrefHelper.kt b/app/src/main/java/io/github/wulkanowy/data/db/SharedPrefHelper.kt
deleted file mode 100644
index b3b6f5e3e..000000000
--- a/app/src/main/java/io/github/wulkanowy/data/db/SharedPrefHelper.kt
+++ /dev/null
@@ -1,25 +0,0 @@
-package io.github.wulkanowy.data.db
-
-import android.annotation.SuppressLint
-import android.content.SharedPreferences
-import javax.inject.Inject
-import javax.inject.Singleton
-
-@Singleton
-class SharedPrefHelper @Inject constructor(private val sharedPref: SharedPreferences) {
-
-    @SuppressLint("ApplySharedPref")
-    fun putLong(key: String, value: Long, sync: Boolean = false) {
-        sharedPref.edit().putLong(key, value).apply {
-            if (sync) commit() else apply()
-        }
-    }
-
-    fun getLong(key: String, defaultValue: Long): Long {
-        return sharedPref.getLong(key, defaultValue)
-    }
-
-    fun delete(key: String) {
-        sharedPref.edit().remove(key).apply()
-    }
-}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/SharedPrefProvider.kt b/app/src/main/java/io/github/wulkanowy/data/db/SharedPrefProvider.kt
new file mode 100644
index 000000000..4a4aaf74f
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/SharedPrefProvider.kt
@@ -0,0 +1,30 @@
+package io.github.wulkanowy.data.db
+
+import android.content.SharedPreferences
+import androidx.core.content.edit
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class SharedPrefProvider @Inject constructor(private val sharedPref: SharedPreferences) {
+
+    companion object {
+        const val APP_VERSION_CODE_KEY = "app_version_code"
+    }
+
+    fun putLong(key: String, value: Long, sync: Boolean = false) {
+        sharedPref.edit(sync) { putLong(key, value) }
+    }
+
+    fun getLong(key: String, defaultValue: Long) = sharedPref.getLong(key, defaultValue)
+
+    fun getString(key: String, defaultValue: String): String = sharedPref.getString(key, defaultValue) ?: defaultValue
+
+    fun putString(key: String, value: String, sync: Boolean = false) {
+        sharedPref.edit(sync) { putString(key, value) }
+    }
+
+    fun delete(key: String) {
+        sharedPref.edit().remove(key).apply()
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/AttendanceDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/AttendanceDao.kt
index d3c4f146f..3eb57473d 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/AttendanceDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/AttendanceDao.kt
@@ -1,8 +1,6 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
 import io.github.wulkanowy.data.db.entities.Attendance
 import io.reactivex.Maybe
@@ -11,13 +9,7 @@ import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface AttendanceDao {
-
-    @Insert
-    fun insertAll(exams: List<Attendance>): List<Long>
-
-    @Delete
-    fun deleteAll(exams: List<Attendance>)
+interface AttendanceDao : BaseDao<Attendance> {
 
     @Query("SELECT * FROM Attendance WHERE diary_id = :diaryId AND student_id = :studentId AND date >= :from AND date <= :end")
     fun loadAll(diaryId: Int, studentId: Int, from: LocalDate, end: LocalDate): Maybe<List<Attendance>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/AttendanceSummaryDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/AttendanceSummaryDao.kt
index a7413de56..fd58533f1 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/AttendanceSummaryDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/AttendanceSummaryDao.kt
@@ -1,20 +1,12 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
 import io.github.wulkanowy.data.db.entities.AttendanceSummary
 import io.reactivex.Maybe
 
 @Dao
-interface AttendanceSummaryDao {
-
-    @Insert
-    fun insertAll(exams: List<AttendanceSummary>): List<Long>
-
-    @Delete
-    fun deleteAll(exams: List<AttendanceSummary>)
+interface AttendanceSummaryDao : BaseDao<AttendanceSummary> {
 
     @Query("SELECT * FROM AttendanceSummary WHERE diary_id = :diaryId AND student_id = :studentId AND subject_id = :subjectId")
     fun loadAll(diaryId: Int, studentId: Int, subjectId: Int): Maybe<List<AttendanceSummary>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/BaseDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/BaseDao.kt
new file mode 100644
index 000000000..32dbadb86
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/BaseDao.kt
@@ -0,0 +1,17 @@
+package io.github.wulkanowy.data.db.dao
+
+import androidx.room.Delete
+import androidx.room.Insert
+import androidx.room.Update
+
+interface BaseDao<T> {
+
+    @Insert
+    fun insertAll(items: List<T>): List<Long>
+
+    @Update
+    fun updateAll(items: List<T>)
+
+    @Delete
+    fun deleteAll(items: List<T>)
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/CompletedLessonsDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/CompletedLessonsDao.kt
index 6816ceaaf..e13e569b6 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/CompletedLessonsDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/CompletedLessonsDao.kt
@@ -1,8 +1,6 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
 import io.github.wulkanowy.data.db.entities.CompletedLesson
 import io.reactivex.Maybe
@@ -11,13 +9,7 @@ import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface CompletedLessonsDao {
-
-    @Insert
-    fun insertAll(exams: List<CompletedLesson>)
-
-    @Delete
-    fun deleteAll(exams: List<CompletedLesson>)
+interface CompletedLessonsDao : BaseDao<CompletedLesson> {
 
     @Query("SELECT * FROM CompletedLesson WHERE diary_id = :diaryId AND student_id = :studentId AND date >= :from AND date <= :end")
     fun loadAll(diaryId: Int, studentId: Int, from: LocalDate, end: LocalDate): Maybe<List<CompletedLesson>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/ExamDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/ExamDao.kt
index 06cd56135..ca6b32dfc 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/ExamDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/ExamDao.kt
@@ -1,8 +1,6 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
 import io.github.wulkanowy.data.db.entities.Exam
 import io.reactivex.Maybe
@@ -11,13 +9,7 @@ import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface ExamDao {
-
-    @Insert
-    fun insertAll(exams: List<Exam>): List<Long>
-
-    @Delete
-    fun deleteAll(exams: List<Exam>)
+interface ExamDao : BaseDao<Exam> {
 
     @Query("SELECT * FROM Exams WHERE diary_id = :diaryId AND student_id = :studentId AND date >= :from AND date <= :end")
     fun loadAll(diaryId: Int, studentId: Int, from: LocalDate, end: LocalDate): Maybe<List<Exam>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/GradeDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/GradeDao.kt
index 0bd210b02..c74d1937f 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/GradeDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/GradeDao.kt
@@ -1,26 +1,14 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
-import androidx.room.Update
 import io.github.wulkanowy.data.db.entities.Grade
 import io.reactivex.Maybe
 import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface GradeDao {
-
-    @Insert
-    fun insertAll(grades: List<Grade>)
-
-    @Update
-    fun updateAll(grade: List<Grade>)
-
-    @Delete
-    fun deleteAll(grades: List<Grade>)
+interface GradeDao : BaseDao<Grade> {
 
     @Query("SELECT * FROM Grades WHERE semester_id = :semesterId AND student_id = :studentId")
     fun loadAll(semesterId: Int, studentId: Int): Maybe<List<Grade>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/GradePointsStatisticsDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/GradePointsStatisticsDao.kt
new file mode 100644
index 000000000..376092865
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/GradePointsStatisticsDao.kt
@@ -0,0 +1,18 @@
+package io.github.wulkanowy.data.db.dao
+
+import androidx.room.Dao
+import androidx.room.Query
+import io.github.wulkanowy.data.db.entities.GradePointsStatistics
+import io.reactivex.Maybe
+import javax.inject.Singleton
+
+@Singleton
+@Dao
+interface GradePointsStatisticsDao : BaseDao<GradePointsStatistics> {
+
+    @Query("SELECT * FROM GradesPointsStatistics WHERE student_id = :studentId AND semester_id = :semesterId AND subject = :subjectName")
+    fun loadSubject(semesterId: Int, studentId: Int, subjectName: String): Maybe<GradePointsStatistics>
+
+    @Query("SELECT * FROM GradesPointsStatistics WHERE student_id = :studentId AND semester_id = :semesterId")
+    fun loadAll(semesterId: Int, studentId: Int): Maybe<List<GradePointsStatistics>>
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/GradeStatisticsDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/GradeStatisticsDao.kt
index 338c369fa..6faa35d0b 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/GradeStatisticsDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/GradeStatisticsDao.kt
@@ -1,8 +1,6 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
 import io.github.wulkanowy.data.db.entities.GradeStatistics
 import io.reactivex.Maybe
@@ -10,13 +8,7 @@ import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface GradeStatisticsDao {
-
-    @Insert
-    fun insertAll(gradesStatistics: List<GradeStatistics>)
-
-    @Delete
-    fun deleteAll(gradesStatistics: List<GradeStatistics>)
+interface GradeStatisticsDao : BaseDao<GradeStatistics> {
 
     @Query("SELECT * FROM GradesStatistics WHERE student_id = :studentId AND semester_id = :semesterId AND subject = :subjectName AND is_semester = :isSemester")
     fun loadSubject(semesterId: Int, studentId: Int, subjectName: String, isSemester: Boolean): Maybe<List<GradeStatistics>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/GradeSummaryDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/GradeSummaryDao.kt
index 3f2e87bd0..1165ef07f 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/GradeSummaryDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/GradeSummaryDao.kt
@@ -1,8 +1,6 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
 import io.github.wulkanowy.data.db.entities.GradeSummary
 import io.reactivex.Maybe
@@ -10,13 +8,7 @@ import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface GradeSummaryDao {
-
-    @Insert
-    fun insertAll(gradesSummary: List<GradeSummary>)
-
-    @Delete
-    fun deleteAll(gradesSummary: List<GradeSummary>)
+interface GradeSummaryDao : BaseDao<GradeSummary> {
 
     @Query("SELECT * FROM GradesSummary WHERE student_id = :studentId AND semester_id = :semesterId")
     fun loadAll(semesterId: Int, studentId: Int): Maybe<List<GradeSummary>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/HomeworkDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/HomeworkDao.kt
index 253bdb11f..1947a0dfe 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/HomeworkDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/HomeworkDao.kt
@@ -1,8 +1,6 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
 import io.github.wulkanowy.data.db.entities.Homework
 import io.reactivex.Maybe
@@ -11,13 +9,7 @@ import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface HomeworkDao {
-
-    @Insert
-    fun insertAll(homework: List<Homework>)
-
-    @Delete
-    fun deleteAll(homework: List<Homework>)
+interface HomeworkDao : BaseDao<Homework> {
 
     @Query("SELECT * FROM Homework WHERE semester_id = :semesterId AND student_id = :studentId AND date >= :from AND date <= :end")
     fun loadAll(semesterId: Int, studentId: Int, from: LocalDate, end: LocalDate): Maybe<List<Homework>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/LuckyNumberDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/LuckyNumberDao.kt
index afd7905c0..f16c28d9e 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/LuckyNumberDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/LuckyNumberDao.kt
@@ -1,10 +1,7 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
-import androidx.room.Update
 import io.github.wulkanowy.data.db.entities.LuckyNumber
 import io.reactivex.Maybe
 import org.threeten.bp.LocalDate
@@ -12,18 +9,8 @@ import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface LuckyNumberDao {
-
-    @Insert
-    fun insert(luckyNumber: LuckyNumber)
-
-    @Update
-    fun update(luckyNumber: LuckyNumber)
-
-    @Delete
-    fun delete(luckyNumber: LuckyNumber)
+interface LuckyNumberDao : BaseDao<LuckyNumber> {
 
     @Query("SELECT * FROM LuckyNumbers WHERE student_id = :studentId AND date = :date")
     fun load(studentId: Int, date: LocalDate): Maybe<LuckyNumber>
-
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/MessagesDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/MessagesDao.kt
index 3ef5d6905..6d14ad016 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/MessagesDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/MessagesDao.kt
@@ -1,30 +1,18 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
-import androidx.room.Update
 import io.github.wulkanowy.data.db.entities.Message
 import io.reactivex.Maybe
 
 @Dao
-interface MessagesDao {
-
-    @Insert
-    fun insertAll(messages: List<Message>)
-
-    @Delete
-    fun deleteAll(messages: List<Message>)
-
-    @Update
-    fun updateAll(messages: List<Message>)
+interface MessagesDao : BaseDao<Message> {
 
     @Query("SELECT * FROM Messages WHERE student_id = :studentId AND folder_id = :folder AND removed = 0 ORDER BY date DESC")
     fun loadAll(studentId: Int, folder: Int): Maybe<List<Message>>
 
-    @Query("SELECT * FROM Messages WHERE student_id = :studentId AND real_id = :id")
-    fun load(studentId: Int, id: Int): Maybe<Message>
+    @Query("SELECT * FROM Messages WHERE id = :id")
+    fun load(id: Long): Maybe<Message>
 
     @Query("SELECT * FROM Messages WHERE student_id = :studentId AND removed = 1 ORDER BY date DESC")
     fun loadDeleted(studentId: Int): Maybe<List<Message>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/MobileDeviceDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/MobileDeviceDao.kt
new file mode 100644
index 000000000..b05b2d9cc
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/MobileDeviceDao.kt
@@ -0,0 +1,13 @@
+package io.github.wulkanowy.data.db.dao
+
+import androidx.room.Dao
+import androidx.room.Query
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.reactivex.Maybe
+
+@Dao
+interface MobileDeviceDao : BaseDao<MobileDevice> {
+
+    @Query("SELECT * FROM MobileDevices WHERE student_id = :studentId ORDER BY date DESC")
+    fun loadAll(studentId: Int): Maybe<List<MobileDevice>>
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/NoteDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/NoteDao.kt
index 867e06a25..ea2fc6eb2 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/NoteDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/NoteDao.kt
@@ -1,28 +1,15 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
-import androidx.room.Update
 import io.github.wulkanowy.data.db.entities.Note
 import io.reactivex.Maybe
 import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface NoteDao {
-
-    @Insert
-    fun insertAll(notes: List<Note>)
-
-    @Update
-    fun updateAll(notes: List<Note>)
-
-    @Delete
-    fun deleteAll(notes: List<Note>)
+interface NoteDao : BaseDao<Note> {
 
     @Query("SELECT * FROM Notes WHERE student_id = :studentId")
     fun loadAll(studentId: Int): Maybe<List<Note>>
-
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/RecipientDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/RecipientDao.kt
index 7c5fd6ca6..afb941b1a 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/RecipientDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/RecipientDao.kt
@@ -1,8 +1,6 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
 import io.github.wulkanowy.data.db.entities.Recipient
 import io.reactivex.Maybe
@@ -10,13 +8,7 @@ import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface RecipientDao {
-
-    @Insert
-    fun insertAll(messages: List<Recipient>)
-
-    @Delete
-    fun deleteAll(messages: List<Recipient>)
+interface RecipientDao : BaseDao<Recipient> {
 
     @Query("SELECT * FROM Recipients WHERE student_id = :studentId AND role = :role AND unit_id = :unitId")
     fun load(studentId: Int, role: Int, unitId: Int): Maybe<List<Recipient>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/ReportingUnitDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/ReportingUnitDao.kt
index 1898390a9..6ddfd4941 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/ReportingUnitDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/ReportingUnitDao.kt
@@ -1,8 +1,6 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
 import io.github.wulkanowy.data.db.entities.ReportingUnit
 import io.reactivex.Maybe
@@ -10,13 +8,7 @@ import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface ReportingUnitDao {
-
-    @Insert
-    fun insertAll(reportingUnits: List<ReportingUnit>)
-
-    @Delete
-    fun deleteAll(reportingUnits: List<ReportingUnit>)
+interface ReportingUnitDao : BaseDao<ReportingUnit> {
 
     @Query("SELECT * FROM ReportingUnits WHERE student_id = :studentId")
     fun load(studentId: Int): Maybe<List<ReportingUnit>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/SchoolDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/SchoolDao.kt
new file mode 100644
index 000000000..e9bd67557
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/SchoolDao.kt
@@ -0,0 +1,15 @@
+package io.github.wulkanowy.data.db.dao
+
+import androidx.room.Dao
+import androidx.room.Query
+import io.github.wulkanowy.data.db.entities.School
+import io.reactivex.Maybe
+import javax.inject.Singleton
+
+@Singleton
+@Dao
+interface SchoolDao : BaseDao<School> {
+
+    @Query("SELECT * FROM School WHERE student_id = :studentId AND class_id = :classId")
+    fun load(studentId: Int, classId: Int): Maybe<School>
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/SemesterDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/SemesterDao.kt
index 01841fb67..654b80f38 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/SemesterDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/SemesterDao.kt
@@ -1,8 +1,6 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
 import io.github.wulkanowy.data.db.entities.Semester
 import io.reactivex.Maybe
@@ -10,13 +8,7 @@ import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface SemesterDao {
-
-    @Insert
-    fun insertAll(semester: List<Semester>)
-
-    @Delete
-    fun deleteAll(semester: List<Semester>)
+interface SemesterDao : BaseDao<Semester> {
 
     @Query("SELECT * FROM Semesters WHERE student_id = :studentId AND class_id = :classId")
     fun loadAll(studentId: Int, classId: Int): Maybe<List<Semester>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/StudentDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/StudentDao.kt
index 8110bb696..57bf25fb8 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/StudentDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/StudentDao.kt
@@ -14,7 +14,7 @@ import javax.inject.Singleton
 interface StudentDao {
 
     @Insert(onConflict = ABORT)
-    fun insert(student: Student): Long
+    fun insertAll(student: List<Student>): List<Long>
 
     @Delete
     fun delete(student: Student)
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/SubjectDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/SubjectDao.kt
index 725a371ab..525a7129a 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/SubjectDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/SubjectDao.kt
@@ -1,20 +1,12 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
 import io.github.wulkanowy.data.db.entities.Subject
 import io.reactivex.Maybe
 
 @Dao
-interface SubjectDao {
-
-    @Insert
-    fun insertAll(subjects: List<Subject>): List<Long>
-
-    @Delete
-    fun deleteAll(subjects: List<Subject>)
+interface SubjectDao : BaseDao<Subject> {
 
     @Query("SELECT * FROM Subjects WHERE diary_id = :diaryId AND student_id = :studentId")
     fun loadAll(diaryId: Int, studentId: Int): Maybe<List<Subject>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/TeacherDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/TeacherDao.kt
new file mode 100644
index 000000000..5ea237a84
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/TeacherDao.kt
@@ -0,0 +1,15 @@
+package io.github.wulkanowy.data.db.dao
+
+import androidx.room.Dao
+import androidx.room.Query
+import io.github.wulkanowy.data.db.entities.Teacher
+import io.reactivex.Maybe
+import javax.inject.Singleton
+
+@Singleton
+@Dao
+interface TeacherDao : BaseDao<Teacher> {
+
+    @Query("SELECT * FROM Teachers WHERE student_id = :studentId AND class_id = :classId")
+    fun loadAll(studentId: Int, classId: Int): Maybe<List<Teacher>>
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/dao/TimetableDao.kt b/app/src/main/java/io/github/wulkanowy/data/db/dao/TimetableDao.kt
index abe213618..6b62cc82a 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/TimetableDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/TimetableDao.kt
@@ -1,8 +1,6 @@
 package io.github.wulkanowy.data.db.dao
 
 import androidx.room.Dao
-import androidx.room.Delete
-import androidx.room.Insert
 import androidx.room.Query
 import io.github.wulkanowy.data.db.entities.Timetable
 import io.reactivex.Maybe
@@ -11,13 +9,7 @@ import javax.inject.Singleton
 
 @Singleton
 @Dao
-interface TimetableDao {
-
-    @Insert
-    fun insertAll(exams: List<Timetable>): List<Long>
-
-    @Delete
-    fun deleteAll(exams: List<Timetable>)
+interface TimetableDao : BaseDao<Timetable> {
 
     @Query("SELECT * FROM Timetable WHERE diary_id = :diaryId AND student_id = :studentId AND date >= :from AND date <= :end")
     fun loadAll(diaryId: Int, studentId: Int, from: LocalDate, end: LocalDate): Maybe<List<Timetable>>
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/entities/Grade.kt b/app/src/main/java/io/github/wulkanowy/data/db/entities/Grade.kt
index 1221a7aab..3f69c61b1 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/entities/Grade.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/entities/Grade.kt
@@ -19,7 +19,7 @@ data class Grade(
 
     val entry: String,
 
-    val value: Int,
+    val value: Double,
 
     val modifier: Double,
 
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/entities/GradePointsStatistics.kt b/app/src/main/java/io/github/wulkanowy/data/db/entities/GradePointsStatistics.kt
new file mode 100644
index 000000000..407f18bd6
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/entities/GradePointsStatistics.kt
@@ -0,0 +1,24 @@
+package io.github.wulkanowy.data.db.entities
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "GradesPointsStatistics")
+data class GradePointsStatistics(
+
+    @ColumnInfo(name = "student_id")
+    val studentId: Int,
+
+    @ColumnInfo(name = "semester_id")
+    val semesterId: Int,
+
+    val subject: String,
+
+    val others: Double,
+
+    val student: Double
+) {
+    @PrimaryKey(autoGenerate = true)
+    var id: Long = 0
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/entities/GradeSummary.kt b/app/src/main/java/io/github/wulkanowy/data/db/entities/GradeSummary.kt
index e6ac4926d..6e29112b2 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/entities/GradeSummary.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/entities/GradeSummary.kt
@@ -13,11 +13,26 @@ data class GradeSummary(
     @ColumnInfo(name = "student_id")
     val studentId: Int,
 
+    val position: Int,
+
     val subject: String,
 
+    @ColumnInfo(name = "predicted_grade")
     val predictedGrade: String,
 
-    val finalGrade: String
+    @ColumnInfo(name = "final_grade")
+    val finalGrade: String,
+
+    @ColumnInfo(name = "proposed_points")
+    val proposedPoints: String,
+
+    @ColumnInfo(name = "final_points")
+    val finalPoints: String,
+
+    @ColumnInfo(name = "points_sum")
+    val pointsSum: String,
+
+    val average: Double
 ) {
     @PrimaryKey(autoGenerate = true)
     var id: Long = 0
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/entities/Message.kt b/app/src/main/java/io/github/wulkanowy/data/db/entities/Message.kt
index 48b4fd022..93e254c3b 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/entities/Message.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/entities/Message.kt
@@ -29,6 +29,8 @@ data class Message(
 
     val subject: String,
 
+    var content: String,
+
     val date: LocalDateTime,
 
     @ColumnInfo(name = "folder_id")
@@ -50,6 +52,4 @@ data class Message(
 
     @ColumnInfo(name = "is_notified")
     var isNotified: Boolean = true
-
-    var content: String? = null
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/entities/MobileDevice.kt b/app/src/main/java/io/github/wulkanowy/data/db/entities/MobileDevice.kt
new file mode 100644
index 000000000..f67ed599f
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/entities/MobileDevice.kt
@@ -0,0 +1,25 @@
+package io.github.wulkanowy.data.db.entities
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import org.threeten.bp.LocalDateTime
+import java.io.Serializable
+
+@Entity(tableName = "MobileDevices")
+data class MobileDevice(
+
+    @ColumnInfo(name = "student_id")
+    val studentId: Int,
+
+    @ColumnInfo(name = "device_id")
+    val deviceId: Int,
+
+    val name: String,
+
+    val date: LocalDateTime
+) : Serializable {
+
+    @PrimaryKey(autoGenerate = true)
+    var id: Long = 0
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/entities/School.kt b/app/src/main/java/io/github/wulkanowy/data/db/entities/School.kt
new file mode 100644
index 000000000..20fae4508
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/entities/School.kt
@@ -0,0 +1,30 @@
+package io.github.wulkanowy.data.db.entities
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import java.io.Serializable
+
+@Entity(tableName = "School")
+data class School(
+
+    @ColumnInfo(name = "student_id")
+    val studentId: Int,
+
+    @ColumnInfo(name = "class_id")
+    val classId: Int,
+
+    val name: String,
+
+    val address: String,
+
+    val contact: String,
+
+    val headmaster: String,
+
+    val pedagogue: String
+) : Serializable {
+
+    @PrimaryKey(autoGenerate = true)
+    var id: Long = 0
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/entities/Student.kt b/app/src/main/java/io/github/wulkanowy/data/db/entities/Student.kt
index 13c5ee084..fe0283f87 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/entities/Student.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/entities/Student.kt
@@ -10,10 +10,27 @@ import java.io.Serializable
 @Entity(tableName = "Students", indices = [Index(value = ["email", "symbol", "student_id", "school_id", "class_id"], unique = true)])
 data class Student(
 
-    val endpoint: String,
+    @ColumnInfo(name = "scrapper_base_url")
+    val scrapperBaseUrl: String,
 
+    @ColumnInfo(name = "mobile_base_url")
+    val mobileBaseUrl: String,
+
+    @ColumnInfo(name = "login_type")
     val loginType: String,
 
+    @ColumnInfo(name = "login_mode")
+    val loginMode: String,
+
+    @ColumnInfo(name = "certificate_key")
+    val certificateKey: String,
+
+    @ColumnInfo(name = "private_key")
+    val privateKey: String,
+
+    @ColumnInfo(name = "is_parent")
+    val isParent: Boolean,
+
     val email: String,
 
     var password: String,
@@ -23,6 +40,9 @@ data class Student(
     @ColumnInfo(name = "student_id")
     val studentId: Int,
 
+    @ColumnInfo(name = "user_login_id")
+    val userLoginId: Int,
+
     @ColumnInfo(name = "student_name")
     val studentName: String,
 
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/entities/Teacher.kt b/app/src/main/java/io/github/wulkanowy/data/db/entities/Teacher.kt
new file mode 100644
index 000000000..52c96f8a3
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/entities/Teacher.kt
@@ -0,0 +1,27 @@
+package io.github.wulkanowy.data.db.entities
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import java.io.Serializable
+
+@Entity(tableName = "Teachers")
+data class Teacher(
+
+    @ColumnInfo(name = "student_id")
+    val studentId: Int,
+
+    @ColumnInfo(name = "class_id")
+    val classId: Int,
+
+    val subject: String,
+
+    val name: String,
+
+    @ColumnInfo(name = "short_name")
+    val shortName: String
+) : Serializable {
+
+    @PrimaryKey(autoGenerate = true)
+    var id: Long = 0
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration11.kt b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration11.kt
index cb437c0ee..6d129bca0 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration11.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration11.kt
@@ -8,7 +8,7 @@ class Migration11 : Migration(10, 11) {
     override fun migrate(database: SupportSQLiteDatabase) {
         database.execSQL("""
             CREATE TABLE IF NOT EXISTS Grades_temp (
-                id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                id INTEGER PRIMARY KEY NOT NULL,
                 is_read INTEGER NOT NULL,
                 is_notified INTEGER NOT NULL,
                 semester_id INTEGER NOT NULL,
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration14.kt b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration14.kt
new file mode 100644
index 000000000..4dac0d306
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration14.kt
@@ -0,0 +1,26 @@
+package io.github.wulkanowy.data.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration14 : Migration(13, 14) {
+
+    override fun migrate(database: SupportSQLiteDatabase) {
+        database.execSQL("DROP TABLE IF EXISTS GradesSummary")
+        database.execSQL("""
+            CREATE TABLE IF NOT EXISTS GradesSummary (
+                id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                semester_id INTEGER NOT NULL,
+                student_id INTEGER NOT NULL,
+                position INTEGER NOT NULL,
+                subject TEXT NOT NULL,
+                predicted_grade TEXT NOT NULL,
+                final_grade TEXT NOT NULL,
+                proposed_points TEXT NOT NULL,
+                final_points TEXT NOT NULL,
+                points_sum TEXT NOT NULL,
+                average REAL NOT NULL
+            )
+        """)
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration15.kt b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration15.kt
new file mode 100644
index 000000000..5be49a95b
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration15.kt
@@ -0,0 +1,19 @@
+package io.github.wulkanowy.data.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration15 : Migration(14, 15) {
+
+    override fun migrate(database: SupportSQLiteDatabase) {
+        database.execSQL("""
+            CREATE TABLE IF NOT EXISTS MobileDevices (
+                id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                student_id INTEGER NOT NULL,
+                device_id INTEGER NOT NULL,
+                name TEXT NOT NULL,
+                date INTEGER NOT NULL
+            )
+        """)
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration16.kt b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration16.kt
new file mode 100644
index 000000000..7f40c0f8d
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration16.kt
@@ -0,0 +1,20 @@
+package io.github.wulkanowy.data.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration16 : Migration(15, 16) {
+
+    override fun migrate(database: SupportSQLiteDatabase) {
+        database.execSQL("""
+            CREATE TABLE IF NOT EXISTS Teachers (
+                id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                student_id INTEGER NOT NULL,
+                class_id INTEGER NOT NULL,
+                subject TEXT NOT NULL,
+                name TEXT NOT NULL,
+                short_name TEXT NOT NULL
+            )
+        """)
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration17.kt b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration17.kt
new file mode 100644
index 000000000..e2a2574db
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration17.kt
@@ -0,0 +1,29 @@
+package io.github.wulkanowy.data.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration17 : Migration(16, 17) {
+
+    override fun migrate(database: SupportSQLiteDatabase) {
+        createGradesPointsStatisticsTable(database)
+        truncateSemestersTable(database)
+    }
+
+    private fun createGradesPointsStatisticsTable(database: SupportSQLiteDatabase) {
+        database.execSQL("""
+            CREATE TABLE IF NOT EXISTS GradesPointsStatistics(
+                id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                student_id INTEGER NOT NULL,
+                semester_id INTEGER NOT NULL,
+                subject TEXT NOT NULL,
+                others REAL NOT NULL,
+                student REAL NOT NULL
+            )
+        """)
+    }
+
+    private fun truncateSemestersTable(database: SupportSQLiteDatabase) {
+        database.execSQL("DELETE FROM Semesters")
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration18.kt b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration18.kt
new file mode 100644
index 000000000..6c5e56c6a
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration18.kt
@@ -0,0 +1,22 @@
+package io.github.wulkanowy.data.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration18 : Migration(17, 18) {
+
+    override fun migrate(database: SupportSQLiteDatabase) {
+        database.execSQL("""
+            CREATE TABLE IF NOT EXISTS School (
+                id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                student_id INTEGER NOT NULL,
+                class_id INTEGER NOT NULL,
+                name TEXT NOT NULL,
+                address TEXT NOT NULL,
+                contact TEXT NOT NULL,
+                headmaster TEXT NOT NULL,
+                pedagogue TEXT NOT NULL
+            )
+        """)
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration19.kt b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration19.kt
new file mode 100644
index 000000000..d38f1245a
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration19.kt
@@ -0,0 +1,119 @@
+package io.github.wulkanowy.data.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+import io.github.wulkanowy.data.db.SharedPrefProvider
+
+class Migration19(private val sharedPrefProvider: SharedPrefProvider) : Migration(18, 19) {
+
+    override fun migrate(database: SupportSQLiteDatabase) {
+        migrateMessages(database)
+        migrateGrades(database)
+        migrateStudents(database)
+        migrateSharedPreferences()
+    }
+
+    private fun migrateMessages(database: SupportSQLiteDatabase) {
+        database.execSQL("DROP TABLE Messages")
+        database.execSQL("""
+            CREATE TABLE IF NOT EXISTS Messages (
+                id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                is_notified INTEGER NOT NULL,
+                student_id INTEGER NOT NULL,
+                real_id INTEGER NOT NULL,
+                message_id INTEGER NOT NULL,
+                sender_name TEXT NOT NULL,
+                sender_id INTEGER NOT NULL,
+                recipient_name TEXT NOT NULL,
+                subject TEXT NOT NULL,
+                content TEXT NOT NULL,
+                date INTEGER NOT NULL,
+                folder_id INTEGER NOT NULL,
+                unread INTEGER NOT NULL,
+                unread_by INTEGER NOT NULL,
+                read_by INTEGER NOT NULL,
+                removed INTEGER NOT NULL
+            )
+        """)
+    }
+
+    private fun migrateGrades(database: SupportSQLiteDatabase) {
+        database.execSQL("DROP TABLE Grades")
+        database.execSQL("""
+            CREATE TABLE IF NOT EXISTS Grades (
+                id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                is_read INTEGER NOT NULL,
+                is_notified INTEGER NOT NULL,
+                semester_id INTEGER NOT NULL,
+                student_id INTEGER NOT NULL,
+                subject TEXT NOT NULL,
+                entry TEXT NOT NULL,
+                value REAL NOT NULL,
+                modifier REAL NOT NULL,
+                comment TEXT NOT NULL,
+                color TEXT NOT NULL,
+                grade_symbol TEXT NOT NULL,
+                description TEXT NOT NULL,
+                weight TEXT NOT NULL,
+                weightValue REAL NOT NULL,
+                date INTEGER NOT NULL,
+                teacher TEXT NOT NULL
+            )
+        """)
+    }
+
+    private fun migrateStudents(database: SupportSQLiteDatabase) {
+        database.execSQL("""
+            CREATE TABLE IF NOT EXISTS Students_tmp (
+                id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                scrapper_base_url TEXT NOT NULL,
+                mobile_base_url TEXT NOT NULL,
+                is_parent INTEGER NOT NULL,
+                login_type TEXT NOT NULL,
+                login_mode TEXT NOT NULL,
+                certificate_key TEXT NOT NULL,
+                private_key TEXT NOT NULL,
+                email TEXT NOT NULL,
+                password TEXT NOT NULL,
+                symbol TEXT NOT NULL,
+                student_id INTEGER NOT NULL,
+                user_login_id INTEGER NOT NULL,
+                student_name TEXT NOT NULL,
+                school_id TEXT NOT NULL,
+                school_name TEXT NOT NULL,
+                class_name TEXT NOT NULL,
+                class_id INTEGER NOT NULL,
+                is_current INTEGER NOT NULL,
+                registration_date INTEGER NOT NULL
+            )
+        """)
+
+        database.execSQL("ALTER TABLE Students ADD COLUMN scrapperBaseUrl TEXT NOT NULL DEFAULT \"\";")
+        database.execSQL("ALTER TABLE Students ADD COLUMN apiBaseUrl TEXT NOT NULL DEFAULT \"\";")
+        database.execSQL("ALTER TABLE Students ADD COLUMN is_parent INT NOT NULL DEFAULT 0;")
+        database.execSQL("ALTER TABLE Students ADD COLUMN loginMode TEXT NOT NULL DEFAULT \"\";")
+        database.execSQL("ALTER TABLE Students ADD COLUMN certificateKey TEXT NOT NULL DEFAULT \"\";")
+        database.execSQL("ALTER TABLE Students ADD COLUMN privateKey TEXT NOT NULL DEFAULT \"\";")
+        database.execSQL("ALTER TABLE Students ADD COLUMN user_login_id INTEGER NOT NULL DEFAULT 0;")
+
+        database.execSQL("""
+            INSERT INTO Students_tmp(
+            id, scrapper_base_url, mobile_base_url, is_parent, login_type, login_mode, certificate_key, private_key, email, password, symbol, student_id, user_login_id, student_name, school_id, school_name, school_id, school_name, class_name, class_id, is_current, registration_date)
+            SELECT
+            id, endpoint, apiBaseUrl, is_parent, loginType, "SCRAPPER", certificateKey, privateKey, email, password, symbol, student_id, user_login_id, student_name, school_id, school_name, school_id, school_name, class_name, class_id, is_current, registration_date
+            FROM Students
+        """)
+        database.execSQL("DROP TABLE Students")
+        database.execSQL("ALTER TABLE Students_tmp RENAME TO Students")
+        database.execSQL("CREATE UNIQUE INDEX index_Students_email_symbol_student_id_school_id_class_id ON Students (email, symbol, student_id, school_id, class_id)")
+    }
+
+    private fun migrateSharedPreferences() {
+        if (sharedPrefProvider.getString("grade_modifier_plus", "0.0") == "0.0") {
+            sharedPrefProvider.putString("grade_modifier_plus", "0.33")
+        }
+        if (sharedPrefProvider.getString("grade_modifier_minus", "0.0") == "0.0") {
+            sharedPrefProvider.putString("grade_modifier_minus", "0.33")
+        }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/pojos/MobileDeviceToken.kt b/app/src/main/java/io/github/wulkanowy/data/pojos/MobileDeviceToken.kt
new file mode 100644
index 000000000..401018211
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/pojos/MobileDeviceToken.kt
@@ -0,0 +1,12 @@
+package io.github.wulkanowy.data.pojos
+
+data class MobileDeviceToken(
+
+    val token: String,
+
+    val symbol: String,
+
+    val pin: String,
+
+    val qr: String
+)
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRemote.kt
index b3544c3f5..cd7702c10 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRemote.kt
@@ -1,25 +1,24 @@
 package io.github.wulkanowy.data.repositories.attendance
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.Attendance
 import io.github.wulkanowy.data.db.entities.Semester
-import io.github.wulkanowy.utils.toLocalDate
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import org.threeten.bp.LocalDate
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class AttendanceRemote @Inject constructor(private val api: Api) {
+class AttendanceRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getAttendance(semester: Semester, startDate: LocalDate, endDate: LocalDate): Single<List<Attendance>> {
-        return Single.just(api.apply { diaryId = semester.diaryId })
-            .flatMap { it.getAttendance(startDate, endDate) }.map { attendance ->
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getAttendance(startDate, endDate, semester.semesterId)
+            .map { attendance ->
                 attendance.map {
                     Attendance(
                         studentId = semester.studentId,
                         diaryId = semester.diaryId,
-                        date = it.date.toLocalDate(),
+                        date = it.date,
                         number = it.number,
                         subject = it.subject,
                         name = it.name,
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRepository.kt
index f6eb07dae..85102b3c5 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRepository.kt
@@ -6,6 +6,7 @@ import io.github.wulkanowy.data.db.entities.Attendance
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.utils.friday
 import io.github.wulkanowy.utils.monday
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Single
 import org.threeten.bp.LocalDate
 import java.net.UnknownHostException
@@ -31,8 +32,8 @@ class AttendanceRepository @Inject constructor(
                         local.getAttendance(semester, dates.first, dates.second)
                             .toSingle(emptyList())
                             .doOnSuccess { oldAttendance ->
-                                local.deleteAttendance(oldAttendance - newAttendance)
-                                local.saveAttendance(newAttendance - oldAttendance)
+                                local.deleteAttendance(oldAttendance.uniqueSubtract(newAttendance))
+                                local.saveAttendance(newAttendance.uniqueSubtract(oldAttendance))
                             }
                     }.flatMap {
                         local.getAttendance(semester, dates.first, dates.second)
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/attendancesummary/AttendanceSummaryRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/attendancesummary/AttendanceSummaryRemote.kt
index d38dd3a4b..c167427f7 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/attendancesummary/AttendanceSummaryRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/attendancesummary/AttendanceSummaryRemote.kt
@@ -1,18 +1,18 @@
 package io.github.wulkanowy.data.repositories.attendancesummary
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.AttendanceSummary
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class AttendanceSummaryRemote @Inject constructor(private val api: Api) {
+class AttendanceSummaryRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getAttendanceSummary(semester: Semester, subjectId: Int): Single<List<AttendanceSummary>> {
-        return Single.just(api.apply { diaryId = semester.diaryId })
-            .flatMap { api.getAttendanceSummary(subjectId) }.map { attendance ->
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getAttendanceSummary(subjectId)
+            .map { attendance ->
                 attendance.map {
                     AttendanceSummary(
                         studentId = semester.studentId,
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/attendancesummary/AttendanceSummaryRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/attendancesummary/AttendanceSummaryRepository.kt
index 90d39aab2..c65870508 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/attendancesummary/AttendanceSummaryRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/attendancesummary/AttendanceSummaryRepository.kt
@@ -4,6 +4,7 @@ import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
 import io.github.wulkanowy.data.db.entities.AttendanceSummary
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Single
 import java.net.UnknownHostException
 import javax.inject.Inject
@@ -25,8 +26,8 @@ class AttendanceSummaryRepository @Inject constructor(
                 }.flatMap { new ->
                     local.getAttendanceSummary(semester, subjectId).toSingle(emptyList())
                         .doOnSuccess { old ->
-                            local.deleteAttendanceSummary(old - new)
-                            local.saveAttendanceSummary(new - old)
+                            local.deleteAttendanceSummary(old.uniqueSubtract(new))
+                            local.saveAttendanceSummary(new.uniqueSubtract(old))
                         }
                 }.flatMap { local.getAttendanceSummary(semester, subjectId).toSingle(emptyList()) })
     }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/completedlessons/CompletedLessonsRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/completedlessons/CompletedLessonsRemote.kt
index 58dd5a9d1..ca680f209 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/completedlessons/CompletedLessonsRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/completedlessons/CompletedLessonsRemote.kt
@@ -1,27 +1,25 @@
 package io.github.wulkanowy.data.repositories.completedlessons
 
-import io.github.wulkanowy.api.Api
-import io.github.wulkanowy.api.toLocalDate
 import io.github.wulkanowy.data.db.entities.CompletedLesson
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import org.threeten.bp.LocalDate
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class CompletedLessonsRemote @Inject constructor(private val api: Api) {
+class CompletedLessonsRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getCompletedLessons(semester: Semester, startDate: LocalDate, endDate: LocalDate): Single<List<CompletedLesson>> {
-        return Single.just(api.apply { diaryId = semester.diaryId })
-            .flatMap { it.getCompletedLessons(startDate, endDate) }
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getCompletedLessons(startDate, endDate)
             .map { lessons ->
                 lessons.map {
                     it.absence
                     CompletedLesson(
                         studentId = semester.studentId,
                         diaryId = semester.diaryId,
-                        date = it.date.toLocalDate(),
+                        date = it.date,
                         number = it.number,
                         subject = it.subject,
                         topic = it.topic,
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/completedlessons/CompletedLessonsRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/completedlessons/CompletedLessonsRepository.kt
index 5b5941076..c22fabc39 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/completedlessons/CompletedLessonsRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/completedlessons/CompletedLessonsRepository.kt
@@ -6,6 +6,7 @@ import io.github.wulkanowy.data.db.entities.CompletedLesson
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.utils.friday
 import io.github.wulkanowy.utils.monday
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Single
 import org.threeten.bp.LocalDate
 import java.net.UnknownHostException
@@ -31,8 +32,8 @@ class CompletedLessonsRepository @Inject constructor(
                             local.getCompletedLessons(semester, dates.first, dates.second)
                                 .toSingle(emptyList())
                                 .doOnSuccess { old ->
-                                    local.deleteCompleteLessons(old - new)
-                                    local.saveCompletedLessons(new - old)
+                                    local.deleteCompleteLessons(old.uniqueSubtract(new))
+                                    local.saveCompletedLessons(new.uniqueSubtract(old))
                                 }
                         }.flatMap {
                             local.getCompletedLessons(semester, dates.first, dates.second)
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/exam/ExamRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/exam/ExamRemote.kt
index f6d653a61..ea7ec9441 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/exam/ExamRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/exam/ExamRemote.kt
@@ -1,26 +1,25 @@
 package io.github.wulkanowy.data.repositories.exam
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.Exam
 import io.github.wulkanowy.data.db.entities.Semester
-import io.github.wulkanowy.utils.toLocalDate
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import org.threeten.bp.LocalDate
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class ExamRemote @Inject constructor(private val api: Api) {
+class ExamRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getExams(semester: Semester, startDate: LocalDate, endDate: LocalDate): Single<List<Exam>> {
-        return Single.just(api.apply { diaryId = semester.diaryId })
-            .flatMap { it.getExams(startDate, endDate) }.map { exams ->
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getExams(startDate, endDate, semester.semesterId)
+            .map { exams ->
                 exams.map {
                     Exam(
                         studentId = semester.studentId,
                         diaryId = semester.diaryId,
-                        date = it.date.toLocalDate(),
-                        entryDate = it.entryDate.toLocalDate(),
+                        date = it.date,
+                        entryDate = it.entryDate,
                         subject = it.subject,
                         group = it.group,
                         type = it.type,
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/exam/ExamRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/exam/ExamRepository.kt
index a0cb5ba11..be60eaecd 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/exam/ExamRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/exam/ExamRepository.kt
@@ -6,6 +6,7 @@ import io.github.wulkanowy.data.db.entities.Exam
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.utils.friday
 import io.github.wulkanowy.utils.monday
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Single
 import org.threeten.bp.LocalDate
 import java.net.UnknownHostException
@@ -27,12 +28,12 @@ class ExamRepository @Inject constructor(
                         .flatMap {
                             if (it) remote.getExams(semester, dates.first, dates.second)
                             else Single.error(UnknownHostException())
-                        }.flatMap { newExams ->
+                        }.flatMap { new ->
                             local.getExams(semester, dates.first, dates.second)
                                 .toSingle(emptyList())
-                                .doOnSuccess { oldExams ->
-                                    local.deleteExams(oldExams - newExams)
-                                    local.saveExams(newExams - oldExams)
+                                .doOnSuccess { old ->
+                                    local.deleteExams(old.uniqueSubtract(new))
+                                    local.saveExams(new.uniqueSubtract(old))
                                 }
                         }.flatMap {
                             local.getExams(semester, dates.first, dates.second)
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/grade/GradeRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/grade/GradeRemote.kt
index 570ab7a77..d07ac6d1c 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/grade/GradeRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/grade/GradeRemote.kt
@@ -1,35 +1,33 @@
 package io.github.wulkanowy.data.repositories.grade
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.Grade
 import io.github.wulkanowy.data.db.entities.Semester
-import io.github.wulkanowy.utils.toLocalDate
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class GradeRemote @Inject constructor(private val api: Api) {
+class GradeRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getGrades(semester: Semester): Single<List<Grade>> {
-        return Single.just(api.apply { diaryId = semester.diaryId })
-            .flatMap { it.getGrades(semester.semesterId) }
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getGrades(semester.semesterId)
             .map { grades ->
                 grades.map {
                     Grade(
-                        semesterId = semester.semesterId,
                         studentId = semester.studentId,
+                        semesterId = semester.semesterId,
                         subject = it.subject,
                         entry = it.entry,
                         value = it.value,
                         modifier = it.modifier,
                         comment = it.comment,
                         color = it.color,
-                        gradeSymbol = it.symbol.orEmpty(),
-                        description = it.description.orEmpty(),
+                        gradeSymbol = it.symbol,
+                        description = it.description,
                         weight = it.weight,
                         weightValue = it.weightValue,
-                        date = it.date.toLocalDate(),
+                        date = it.date,
                         teacher = it.teacher
                     )
                 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/grade/GradeRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/grade/GradeRepository.kt
index 3dd456bff..7f8e92a2e 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/grade/GradeRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/grade/GradeRepository.kt
@@ -5,6 +5,7 @@ import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.Inter
 import io.github.wulkanowy.data.db.entities.Grade
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Completable
 import io.reactivex.Single
 import java.net.UnknownHostException
@@ -24,13 +25,12 @@ class GradeRepository @Inject constructor(
                 .flatMap {
                     if (it) remote.getGrades(semester)
                     else Single.error(UnknownHostException())
-                }.flatMap { newGrades ->
+                }.flatMap { new ->
                     local.getGrades(semester).toSingle(emptyList())
-                        .doOnSuccess { oldGrades ->
-                            val notifyBreakDate = oldGrades.maxBy { it.date }?.date
-                                ?: student.registrationDate.toLocalDate()
-                            local.deleteGrades(oldGrades - newGrades)
-                            local.saveGrades((newGrades - oldGrades)
+                        .doOnSuccess { old ->
+                            val notifyBreakDate = old.maxBy { it.date }?.date ?: student.registrationDate.toLocalDate()
+                            local.deleteGrades(old.uniqueSubtract(new))
+                            local.saveGrades(new.uniqueSubtract(old)
                                 .onEach {
                                     if (it.date >= notifyBreakDate) it.apply {
                                         isRead = false
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryRemote.kt
index d395decf8..2681fe058 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryRemote.kt
@@ -1,26 +1,30 @@
 package io.github.wulkanowy.data.repositories.gradessummary
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.GradeSummary
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class GradeSummaryRemote @Inject constructor(private val api: Api) {
+class GradeSummaryRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getGradeSummary(semester: Semester): Single<List<GradeSummary>> {
-        return Single.just(api.apply { diaryId = semester.diaryId })
-            .flatMap { it.getGradesSummary(semester.semesterId) }
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getGradesSummary(semester.semesterId)
             .map { gradesSummary ->
                 gradesSummary.map {
                     GradeSummary(
                         semesterId = semester.semesterId,
                         studentId = semester.studentId,
+                        position = 0,
                         subject = it.name,
                         predictedGrade = it.predicted,
-                        finalGrade = it.final
+                        finalGrade = it.final,
+                        pointsSum = it.pointsSum,
+                        proposedPoints = it.proposedPoints,
+                        finalPoints = it.finalPoints,
+                        average = it.average
                     )
                 }
             }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryRepository.kt
index b19e07f00..660a032c2 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryRepository.kt
@@ -4,6 +4,7 @@ import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
 import io.github.wulkanowy.data.db.entities.GradeSummary
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Single
 import java.net.UnknownHostException
 import javax.inject.Inject
@@ -22,11 +23,11 @@ class GradeSummaryRepository @Inject constructor(
                 .flatMap {
                     if (it) remote.getGradeSummary(semester)
                     else Single.error(UnknownHostException())
-                }.flatMap { newGradesSummary ->
+                }.flatMap { new ->
                     local.getGradesSummary(semester).toSingle(emptyList())
-                        .doOnSuccess { oldGradesSummary ->
-                            local.deleteGradesSummary(oldGradesSummary - newGradesSummary)
-                            local.saveGradesSummary(newGradesSummary - oldGradesSummary)
+                        .doOnSuccess { old ->
+                            local.deleteGradesSummary(old.uniqueSubtract(new))
+                            local.saveGradesSummary(new.uniqueSubtract(old))
                         }
                 }.flatMap { local.getGradesSummary(semester).toSingle(emptyList()) })
     }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsLocal.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsLocal.kt
index 581ac2f81..d636b91ac 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsLocal.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsLocal.kt
@@ -1,6 +1,8 @@
 package io.github.wulkanowy.data.repositories.gradestatistics
 
+import io.github.wulkanowy.data.db.dao.GradePointsStatisticsDao
 import io.github.wulkanowy.data.db.dao.GradeStatisticsDao
+import io.github.wulkanowy.data.db.entities.GradePointsStatistics
 import io.github.wulkanowy.data.db.entities.GradeStatistics
 import io.github.wulkanowy.data.db.entities.Semester
 import io.reactivex.Maybe
@@ -8,27 +10,57 @@ import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class GradeStatisticsLocal @Inject constructor(private val gradeStatisticsDb: GradeStatisticsDao) {
+class GradeStatisticsLocal @Inject constructor(
+    private val gradeStatisticsDb: GradeStatisticsDao,
+    private val gradePointsStatisticsDb: GradePointsStatisticsDao
+) {
 
     fun getGradesStatistics(semester: Semester, isSemester: Boolean): Maybe<List<GradeStatistics>> {
-        return gradeStatisticsDb.loadAll(semester.semesterId, semester.studentId, isSemester)
-            .filter { !it.isEmpty() }
+        return gradeStatisticsDb.loadAll(semester.semesterId, semester.studentId, isSemester).filter { it.isNotEmpty() }
+    }
+
+    fun getGradesPointsStatistics(semester: Semester): Maybe<List<GradePointsStatistics>> {
+        return gradePointsStatisticsDb.loadAll(semester.semesterId, semester.studentId).filter { it.isNotEmpty() }
     }
 
     fun getGradesStatistics(semester: Semester, isSemester: Boolean, subjectName: String): Maybe<List<GradeStatistics>> {
-        return (if ("Wszystkie" == subjectName) gradeStatisticsDb.loadAll(semester.semesterId, semester.studentId, isSemester).map { list ->
-            list.groupBy { it.grade }.map {
-                GradeStatistics(semester.studentId, semester.semesterId, subjectName, it.key, it.value.fold(0) { acc, e -> acc + e.amount }, false)
+        return when (subjectName) {
+            "Wszystkie" -> gradeStatisticsDb.loadAll(semester.semesterId, semester.studentId, isSemester).map { list ->
+                list.groupBy { it.grade }.map {
+                    GradeStatistics(semester.studentId, semester.semesterId, subjectName, it.key,
+                        it.value.fold(0) { acc, e -> acc + e.amount }, false)
+                }
             }
+            else -> gradeStatisticsDb.loadSubject(semester.semesterId, semester.studentId, subjectName, isSemester)
+        }.filter { it.isNotEmpty() }
+    }
+
+    fun getGradesPointsStatistics(semester: Semester, subjectName: String): Maybe<GradePointsStatistics> {
+        return when (subjectName) {
+            "Wszystkie" -> gradePointsStatisticsDb.loadAll(semester.semesterId, semester.studentId).flatMap { list ->
+                if (list.isEmpty()) return@flatMap Maybe.empty<GradePointsStatistics>()
+                Maybe.just(GradePointsStatistics(semester.studentId, semester.semesterId, subjectName,
+                    list.fold(.0) { acc, e -> acc + e.others },
+                    list.fold(.0) { acc, e -> acc + e.student })
+                )
+            }
+            else -> gradePointsStatisticsDb.loadSubject(semester.semesterId, semester.studentId, subjectName)
         }
-        else gradeStatisticsDb.loadSubject(semester.semesterId, semester.studentId, subjectName, isSemester)).filter { !it.isEmpty() }
     }
 
     fun saveGradesStatistics(gradesStatistics: List<GradeStatistics>) {
         gradeStatisticsDb.insertAll(gradesStatistics)
     }
 
+    fun saveGradesPointsStatistics(gradePointsStatistics: List<GradePointsStatistics>) {
+        gradePointsStatisticsDb.insertAll(gradePointsStatistics)
+    }
+
     fun deleteGradesStatistics(gradesStatistics: List<GradeStatistics>) {
         gradeStatisticsDb.deleteAll(gradesStatistics)
     }
+
+    fun deleteGradesPointsStatistics(gradesPointsStatistics: List<GradePointsStatistics>) {
+        gradePointsStatisticsDb.deleteAll(gradesPointsStatistics)
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsRemote.kt
index fa3b951f6..f10f30369 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsRemote.kt
@@ -1,27 +1,44 @@
 package io.github.wulkanowy.data.repositories.gradestatistics
 
-import io.github.wulkanowy.api.Api
+import io.github.wulkanowy.data.db.entities.GradePointsStatistics
 import io.github.wulkanowy.data.db.entities.GradeStatistics
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class GradeStatisticsRemote @Inject constructor(private val api: Api) {
+class GradeStatisticsRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getGradeStatistics(semester: Semester, isSemester: Boolean): Single<List<GradeStatistics>> {
-        return Single.just(api.apply { diaryId = semester.diaryId })
-            .flatMap { it.getGradesStatistics(semester.semesterId, isSemester) }
-            .map { gradeStatistics ->
-                gradeStatistics.map {
-                    GradeStatistics(
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).let {
+            if (isSemester) it.getGradesAnnualStatistics(semester.semesterId)
+            else it.getGradesPartialStatistics(semester.semesterId)
+        }.map { gradeStatistics ->
+            gradeStatistics.map {
+                GradeStatistics(
+                    semesterId = semester.semesterId,
+                    studentId = semester.studentId,
+                    subject = it.subject,
+                    grade = it.gradeValue,
+                    amount = it.amount,
+                    semester = isSemester
+                )
+            }
+        }
+    }
+
+    fun getGradePointsStatistics(semester: Semester): Single<List<GradePointsStatistics>> {
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getGradesPointsStatistics(semester.semesterId)
+            .map { gradePointsStatistics ->
+                gradePointsStatistics.map {
+                    GradePointsStatistics(
                         semesterId = semester.semesterId,
                         studentId = semester.studentId,
                         subject = it.subject,
-                        grade = it.gradeValue,
-                        amount = it.amount ?: 0,
-                        semester = isSemester
+                        others = it.others,
+                        student = it.student
                     )
                 }
             }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsRepository.kt
index 870bd1e93..9335d1d21 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsRepository.kt
@@ -2,8 +2,11 @@ package io.github.wulkanowy.data.repositories.gradestatistics
 
 import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
+import io.github.wulkanowy.data.db.entities.GradePointsStatistics
 import io.github.wulkanowy.data.db.entities.GradeStatistics
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.utils.uniqueSubtract
+import io.reactivex.Maybe
 import io.reactivex.Single
 import java.net.UnknownHostException
 import javax.inject.Inject
@@ -22,12 +25,27 @@ class GradeStatisticsRepository @Inject constructor(
                 .flatMap {
                     if (it) remote.getGradeStatistics(semester, isSemester)
                     else Single.error(UnknownHostException())
-                }.flatMap { newGradesStats ->
+                }.flatMap { new ->
                     local.getGradesStatistics(semester, isSemester).toSingle(emptyList())
-                        .doOnSuccess { oldGradesStats ->
-                            local.deleteGradesStatistics(oldGradesStats - newGradesStats)
-                            local.saveGradesStatistics(newGradesStats - oldGradesStats)
+                        .doOnSuccess { old ->
+                            local.deleteGradesStatistics(old.uniqueSubtract(new))
+                            local.saveGradesStatistics(new.uniqueSubtract(old))
                         }
                 }.flatMap { local.getGradesStatistics(semester, isSemester, subjectName).toSingle(emptyList()) })
     }
+
+    fun getGradesPointsStatistics(semester: Semester, subjectName: String, forceRefresh: Boolean): Maybe<GradePointsStatistics> {
+        return local.getGradesPointsStatistics(semester, subjectName).filter { !forceRefresh }
+            .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
+                .flatMapMaybe {
+                    if (it) remote.getGradePointsStatistics(semester).toMaybe()
+                    else Maybe.error(UnknownHostException())
+                }.flatMap { new ->
+                    local.getGradesPointsStatistics(semester).defaultIfEmpty(emptyList())
+                        .doOnSuccess { old ->
+                            local.deleteGradesPointsStatistics(old.uniqueSubtract(new))
+                            local.saveGradesPointsStatistics(new.uniqueSubtract(old))
+                        }
+                }.flatMap { local.getGradesPointsStatistics(semester, subjectName) })
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/homework/HomeworkRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/homework/HomeworkRemote.kt
index 681b66469..189499dbe 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/homework/HomeworkRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/homework/HomeworkRemote.kt
@@ -1,27 +1,25 @@
 package io.github.wulkanowy.data.repositories.homework
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.Homework
 import io.github.wulkanowy.data.db.entities.Semester
-import io.github.wulkanowy.utils.toLocalDate
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import org.threeten.bp.LocalDate
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class HomeworkRemote @Inject constructor(private val api: Api) {
+class HomeworkRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getHomework(semester: Semester, startDate: LocalDate, endDate: LocalDate): Single<List<Homework>> {
-        return Single.just(api.apply { diaryId = semester.diaryId })
-            .flatMap { it.getHomework(startDate, endDate) }
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getHomework(startDate, endDate)
             .map { homework ->
                 homework.map {
                     Homework(
                         semesterId = semester.semesterId,
                         studentId = semester.studentId,
-                        date = it.date.toLocalDate(),
-                        entryDate = it.entryDate.toLocalDate(),
+                        date = it.date,
+                        entryDate = it.entryDate,
                         subject = it.subject,
                         content = it.content,
                         teacher = it.teacher,
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/homework/HomeworkRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/homework/HomeworkRepository.kt
index 0447c86fe..3f924944d 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/homework/HomeworkRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/homework/HomeworkRepository.kt
@@ -6,6 +6,7 @@ import io.github.wulkanowy.data.db.entities.Homework
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.utils.friday
 import io.github.wulkanowy.utils.monday
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Single
 import org.threeten.bp.LocalDate
 import java.net.UnknownHostException
@@ -26,11 +27,11 @@ class HomeworkRepository @Inject constructor(
                     .flatMap {
                         if (it) remote.getHomework(semester, monday, friday)
                         else Single.error(UnknownHostException())
-                    }.flatMap { newGrades ->
+                    }.flatMap { new ->
                         local.getHomework(semester, monday, friday).toSingle(emptyList())
-                            .doOnSuccess { oldGrades ->
-                                local.deleteHomework(oldGrades - newGrades)
-                                local.saveHomework(newGrades - oldGrades)
+                            .doOnSuccess { old ->
+                                local.deleteHomework(old.uniqueSubtract(new))
+                                local.saveHomework(new.uniqueSubtract(old))
                             }
                     }.flatMap { local.getHomework(semester, monday, friday).toSingle(emptyList()) })
         }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/luckynumber/LuckyNumberLocal.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/luckynumber/LuckyNumberLocal.kt
index 115c89652..b461ca22a 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/luckynumber/LuckyNumberLocal.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/luckynumber/LuckyNumberLocal.kt
@@ -12,15 +12,15 @@ import javax.inject.Singleton
 class LuckyNumberLocal @Inject constructor(private val luckyNumberDb: LuckyNumberDao) {
 
     fun saveLuckyNumber(luckyNumber: LuckyNumber) {
-        luckyNumberDb.insert(luckyNumber)
+        luckyNumberDb.insertAll(listOf(luckyNumber))
     }
 
     fun updateLuckyNumber(luckyNumber: LuckyNumber) {
-        luckyNumberDb.update(luckyNumber)
+        luckyNumberDb.updateAll(listOf(luckyNumber))
     }
 
     fun deleteLuckyNumber(luckyNumber: LuckyNumber) {
-        luckyNumberDb.delete(luckyNumber)
+        luckyNumberDb.deleteAll(listOf(luckyNumber))
     }
 
     fun getLuckyNumber(semester: Semester, date: LocalDate): Maybe<LuckyNumber> {
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/luckynumber/LuckyNumberRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/luckynumber/LuckyNumberRemote.kt
index 1b0f12b3e..75454143f 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/luckynumber/LuckyNumberRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/luckynumber/LuckyNumberRemote.kt
@@ -1,20 +1,18 @@
 package io.github.wulkanowy.data.repositories.luckynumber
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.LuckyNumber
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Maybe
-import io.reactivex.Single
 import org.threeten.bp.LocalDate
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class LuckyNumberRemote @Inject constructor(private val api: Api) {
+class LuckyNumberRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getLuckyNumber(semester: Semester): Maybe<LuckyNumber> {
-        return Single.just(api.apply { diaryId = semester.diaryId })
-            .flatMapMaybe { it.getLuckyNumber() }
+        return sdk.getLuckyNumber()
             .map {
                 LuckyNumber(
                     studentId = semester.studentId,
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageLocal.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageLocal.kt
index 411cca395..ce08d13ec 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageLocal.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageLocal.kt
@@ -23,8 +23,8 @@ class MessageLocal @Inject constructor(private val messagesDb: MessagesDao) {
         messagesDb.deleteAll(messages)
     }
 
-    fun getMessage(student: Student, id: Int): Maybe<Message> {
-        return messagesDb.load(student.id.toInt(), id)
+    fun getMessage(id: Long): Maybe<Message> {
+        return messagesDb.load(id)
     }
 
     fun getMessages(student: Student, folder: MessageFolder): Maybe<List<Message>> {
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRemote.kt
index d50c40f37..d27eb904d 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRemote.kt
@@ -1,24 +1,23 @@
 package io.github.wulkanowy.data.repositories.message
 
-import io.github.wulkanowy.api.Api
-import io.github.wulkanowy.api.messages.Folder
-import io.github.wulkanowy.api.messages.SentMessage
 import io.github.wulkanowy.data.db.entities.Message
 import io.github.wulkanowy.data.db.entities.Recipient
+import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
-import io.github.wulkanowy.utils.toLocalDateTime
+import io.github.wulkanowy.sdk.Sdk
+import io.github.wulkanowy.sdk.pojo.Folder
+import io.github.wulkanowy.sdk.pojo.SentMessage
 import io.reactivex.Single
 import org.threeten.bp.LocalDateTime.now
 import javax.inject.Inject
 import javax.inject.Singleton
-import io.github.wulkanowy.api.messages.Message as ApiMessage
-import io.github.wulkanowy.api.messages.Recipient as ApiRecipient
+import io.github.wulkanowy.sdk.pojo.Recipient as SdkRecipient
 
 @Singleton
-class MessageRemote @Inject constructor(private val api: Api) {
+class MessageRemote @Inject constructor(private val sdk: Sdk) {
 
-    fun getMessages(student: Student, folder: MessageFolder): Single<List<Message>> {
-        return api.getMessages(Folder.valueOf(folder.name)).map { messages ->
+    fun getMessages(student: Student, semester: Semester, folder: MessageFolder): Single<List<Message>> {
+        return sdk.getMessages(Folder.valueOf(folder.name), semester.start.atStartOfDay(), semester.end.atStartOfDay()).map { messages ->
             messages.map {
                 Message(
                     studentId = student.id.toInt(),
@@ -28,7 +27,8 @@ class MessageRemote @Inject constructor(private val api: Api) {
                     senderId = it.senderId ?: 0,
                     recipient = it.recipient.orEmpty(),
                     subject = it.subject.trim(),
-                    date = it.date?.toLocalDateTime() ?: now(),
+                    date = it.date ?: now(),
+                    content = it.content.orEmpty(),
                     folderId = it.folderId,
                     unread = it.unread ?: false,
                     unreadBy = it.unreadBy ?: 0,
@@ -40,23 +40,28 @@ class MessageRemote @Inject constructor(private val api: Api) {
     }
 
     fun getMessagesContent(message: Message, markAsRead: Boolean = false): Single<String> {
-        return api.getMessageContent(message.messageId, message.folderId, markAsRead, message.realId)
+        return sdk.getMessageContent(message.messageId, message.folderId, markAsRead, message.realId)
     }
 
     fun sendMessage(subject: String, content: String, recipients: List<Recipient>): Single<SentMessage> {
-        return api.sendMessage(
+        return sdk.sendMessage(
             subject = subject,
             content = content,
             recipients = recipients.map {
-                ApiRecipient(
+                SdkRecipient(
                     id = it.realId,
                     name = it.realName,
                     loginId = it.loginId,
                     reportingUnitId = it.unitId,
                     role = it.role,
-                    hash = it.hash
+                    hash = it.hash,
+                    shortName = it.name
                 )
             }
         )
     }
+
+    fun deleteMessage(message: Message): Single<Boolean> {
+        return sdk.deleteMessages(listOf(Pair(message.realId, message.folderId)))
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRepository.kt
index 3b4f9582f..0dfdd72fe 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRepository.kt
@@ -2,13 +2,16 @@ package io.github.wulkanowy.data.repositories.message
 
 import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
-import io.github.wulkanowy.api.messages.SentMessage
-import io.github.wulkanowy.data.ApiHelper
+import io.github.wulkanowy.data.SdkHelper
 import io.github.wulkanowy.data.db.entities.Message
 import io.github.wulkanowy.data.db.entities.Recipient
+import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.repositories.message.MessageFolder.RECEIVED
+import io.github.wulkanowy.sdk.pojo.SentMessage
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Completable
+import io.reactivex.Maybe
 import io.reactivex.Single
 import java.net.UnknownHostException
 import javax.inject.Inject
@@ -19,22 +22,22 @@ class MessageRepository @Inject constructor(
     private val settings: InternetObservingSettings,
     private val local: MessageLocal,
     private val remote: MessageRemote,
-    private val apiHelper: ApiHelper
+    private val sdkHelper: SdkHelper
 ) {
 
-    fun getMessages(student: Student, folder: MessageFolder, forceRefresh: Boolean = false, notify: Boolean = false): Single<List<Message>> {
-        return Single.just(apiHelper.initApi(student))
+    fun getMessages(student: Student, semester: Semester, folder: MessageFolder, forceRefresh: Boolean = false, notify: Boolean = false): Single<List<Message>> {
+        return Single.just(sdkHelper.init(student))
             .flatMap { _ ->
                 local.getMessages(student, folder).filter { !forceRefresh }
                     .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
                         .flatMap {
-                            if (it) remote.getMessages(student, folder)
+                            if (it) remote.getMessages(student, semester, folder)
                             else Single.error(UnknownHostException())
                         }.flatMap { new ->
                             local.getMessages(student, folder).toSingle(emptyList())
                                 .doOnSuccess { old ->
-                                    local.deleteMessages(old - new)
-                                    local.saveMessages((new - old)
+                                    local.deleteMessages(old.uniqueSubtract(new))
+                                    local.saveMessages(new.uniqueSubtract(old)
                                         .onEach {
                                             it.isNotified = !notify
                                         })
@@ -44,25 +47,25 @@ class MessageRepository @Inject constructor(
             }
     }
 
-    fun getMessage(student: Student, messageId: Int, markAsRead: Boolean = false): Single<Message> {
-        return Single.just(apiHelper.initApi(student))
+    fun getMessage(student: Student, messageDbId: Long, markAsRead: Boolean = false): Single<Message> {
+        return Single.just(sdkHelper.init(student))
             .flatMap { _ ->
-                local.getMessage(student, messageId)
-                    .filter { !it.content.isNullOrEmpty() }
+                local.getMessage(messageDbId)
+                    .filter { it.content.isNotEmpty() }
                     .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
                         .flatMap {
-                            if (it) local.getMessage(student, messageId).toSingle()
+                            if (it) local.getMessage(messageDbId).toSingle()
                             else Single.error(UnknownHostException())
                         }
                         .flatMap { dbMessage ->
                             remote.getMessagesContent(dbMessage, markAsRead).doOnSuccess {
                                 local.updateMessages(listOf(dbMessage.copy(unread = false).apply {
                                     id = dbMessage.id
-                                    content = it
+                                    content = content.ifBlank { it }
                                 }))
                             }
                         }.flatMap {
-                            local.getMessage(student, messageId).toSingle()
+                            local.getMessage(messageDbId).toSingle()
                         }
                     )
             }
@@ -89,4 +92,20 @@ class MessageRepository @Inject constructor(
                 else Single.error(UnknownHostException())
             }
     }
+
+    fun deleteMessage(message: Message): Maybe<Boolean> {
+        return ReactiveNetwork.checkInternetConnectivity(settings)
+            .flatMap {
+                if (it) remote.deleteMessage(message)
+                else Single.error(UnknownHostException())
+            }
+            .filter { it }
+            .doOnSuccess {
+                if (!message.removed) local.updateMessages(listOf(message.copy(removed = true).apply {
+                    id = message.id
+                    content = message.content
+                }))
+                else local.deleteMessages(listOf(message))
+            }
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceLocal.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceLocal.kt
new file mode 100644
index 000000000..473ffa7fe
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceLocal.kt
@@ -0,0 +1,24 @@
+package io.github.wulkanowy.data.repositories.mobiledevice
+
+import io.github.wulkanowy.data.db.dao.MobileDeviceDao
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.db.entities.Semester
+import io.reactivex.Maybe
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class MobileDeviceLocal @Inject constructor(private val mobileDb: MobileDeviceDao) {
+
+    fun saveDevices(devices: List<MobileDevice>) {
+        mobileDb.insertAll(devices)
+    }
+
+    fun deleteDevices(devices: List<MobileDevice>) {
+        mobileDb.deleteAll(devices)
+    }
+
+    fun getDevices(semester: Semester): Maybe<List<MobileDevice>> {
+        return mobileDb.loadAll(semester.studentId).filter { it.isNotEmpty() }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRemote.kt
new file mode 100644
index 000000000..c43c3f21e
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRemote.kt
@@ -0,0 +1,43 @@
+package io.github.wulkanowy.data.repositories.mobiledevice
+
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.pojos.MobileDeviceToken
+import io.github.wulkanowy.sdk.Sdk
+import io.reactivex.Single
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class MobileDeviceRemote @Inject constructor(private val sdk: Sdk) {
+
+    fun getDevices(semester: Semester): Single<List<MobileDevice>> {
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getRegisteredDevices()
+            .map { devices ->
+                devices.map {
+                    MobileDevice(
+                        studentId = semester.studentId,
+                        date = it.date,
+                        deviceId = it.id,
+                        name = it.name
+                    )
+                }
+            }
+    }
+
+    fun unregisterDevice(semester: Semester, device: MobileDevice): Single<Boolean> {
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).unregisterDevice(device.deviceId)
+    }
+
+    fun getToken(semester: Semester): Single<MobileDeviceToken> {
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getToken()
+            .map {
+                MobileDeviceToken(
+                    token = it.token,
+                    symbol = it.symbol,
+                    pin = it.pin,
+                    qr = it.qrCodeImage
+                )
+            }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRepository.kt
new file mode 100644
index 000000000..ac450ff46
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRepository.kt
@@ -0,0 +1,52 @@
+package io.github.wulkanowy.data.repositories.mobiledevice
+
+import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
+import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.pojos.MobileDeviceToken
+import io.github.wulkanowy.utils.uniqueSubtract
+import io.reactivex.Single
+import java.net.UnknownHostException
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class MobileDeviceRepository @Inject constructor(
+    private val settings: InternetObservingSettings,
+    private val local: MobileDeviceLocal,
+    private val remote: MobileDeviceRemote
+) {
+
+    fun getDevices(semester: Semester, forceRefresh: Boolean = false): Single<List<MobileDevice>> {
+        return local.getDevices(semester).filter { !forceRefresh }
+            .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
+                .flatMap {
+                    if (it) remote.getDevices(semester)
+                    else Single.error(UnknownHostException())
+                }.flatMap { new ->
+                    local.getDevices(semester).toSingle(emptyList())
+                        .doOnSuccess { old ->
+                            local.deleteDevices(old uniqueSubtract new)
+                            local.saveDevices(new uniqueSubtract old)
+                        }
+                }
+            ).flatMap { local.getDevices(semester).toSingle(emptyList()) }
+    }
+
+    fun unregisterDevice(semester: Semester, device: MobileDevice): Single<Boolean> {
+        return ReactiveNetwork.checkInternetConnectivity(settings)
+            .flatMap {
+                if (it) remote.unregisterDevice(semester, device)
+                else Single.error(UnknownHostException())
+            }
+    }
+
+    fun getToken(semester: Semester): Single<MobileDeviceToken> {
+        return ReactiveNetwork.checkInternetConnectivity(settings)
+            .flatMap {
+                if (it) remote.getToken(semester)
+                else Single.error(UnknownHostException())
+            }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/note/NoteRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/note/NoteRemote.kt
index aebc6230e..503575b69 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/note/NoteRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/note/NoteRemote.kt
@@ -1,24 +1,22 @@
 package io.github.wulkanowy.data.repositories.note
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.Note
 import io.github.wulkanowy.data.db.entities.Semester
-import io.github.wulkanowy.utils.toLocalDate
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class NoteRemote @Inject constructor(private val api: Api) {
+class NoteRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getNotes(semester: Semester): Single<List<Note>> {
-        return Single.just(api.apply { diaryId = semester.diaryId })
-            .flatMap { it.getNotes() }
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getNotes(semester.semesterId)
             .map { notes ->
                 notes.map {
                     Note(
                         studentId = semester.studentId,
-                        date = it.date.toLocalDate(),
+                        date = it.date,
                         teacher = it.teacher,
                         category = it.category,
                         content = it.content
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/note/NoteRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/note/NoteRepository.kt
index d74bc7eaf..52cb2d0f5 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/note/NoteRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/note/NoteRepository.kt
@@ -5,6 +5,7 @@ import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.Inter
 import io.github.wulkanowy.data.db.entities.Note
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Completable
 import io.reactivex.Single
 import java.net.UnknownHostException
@@ -27,8 +28,8 @@ class NoteRepository @Inject constructor(
                 }.flatMap { new ->
                     local.getNotes(student).toSingle(emptyList())
                         .doOnSuccess { old ->
-                            local.deleteNotes(old - new)
-                            local.saveNotes((new - old)
+                            local.deleteNotes(old.uniqueSubtract(new))
+                            local.saveNotes(new.uniqueSubtract(old)
                                 .onEach {
                                     if (it.date >= student.registrationDate.toLocalDate()) it.apply {
                                         isRead = false
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/preferences/PreferencesRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/preferences/PreferencesRepository.kt
index d51fc4957..07a3654ac 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/preferences/PreferencesRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/preferences/PreferencesRepository.kt
@@ -12,47 +12,64 @@ class PreferencesRepository @Inject constructor(
     val context: Context
 ) {
     val startMenuIndex: Int
-        get() = sharedPref.getString(context.getString(R.string.pref_key_start_menu), "0")?.toIntOrNull() ?: 0
+        get() = getString(R.string.pref_key_start_menu, R.string.pref_default_startup).toInt()
 
     val isShowPresent: Boolean
-        get() = sharedPref.getBoolean(context.getString(R.string.pref_key_attendance_present), true)
+        get() = getBoolean(R.string.pref_key_attendance_present, R.bool.pref_default_attendance_present)
+
+    val gradeAverageMode: String
+        get() = getString(R.string.pref_key_grade_average_mode, R.string.pref_default_grade_average_mode)
+
+    val gradeAverageForceCalc: Boolean
+        get() = getBoolean(R.string.pref_key_grade_average_force_calc, R.bool.pref_default_grade_average_force_calc)
 
     val isGradeExpandable: Boolean
-        get() = !sharedPref.getBoolean(context.getString(R.string.pref_key_expand_grade), false)
+        get() = !getBoolean(R.string.pref_key_expand_grade, R.bool.pref_default_expand_grade)
 
-    val currentThemeKey: String = context.getString(R.string.pref_key_theme)
-    val currentTheme: Int
-        get() = sharedPref.getString(currentThemeKey, "1")?.toIntOrNull() ?: 1
+    val appThemeKey = context.getString(R.string.pref_key_app_theme)
+    val appTheme: String
+        get() = getString(appThemeKey, R.string.pref_default_app_theme)
 
     val gradeColorTheme: String
-        get() = sharedPref.getString(context.getString(R.string.pref_key_grade_color_scheme), "vulcan") ?: "vulcan"
+        get() = getString(R.string.pref_key_grade_color_scheme, R.string.pref_default_grade_color_scheme)
 
-    val serviceEnableKey: String = context.getString(R.string.pref_key_services_enable)
+    val appLanguageKey = context.getString(R.string.pref_key_app_language)
+    val appLanguage
+        get() = getString(appLanguageKey, R.string.pref_default_app_language)
+
+    val serviceEnableKey = context.getString(R.string.pref_key_services_enable)
     val isServiceEnabled: Boolean
-        get() = sharedPref.getBoolean(serviceEnableKey, true)
+        get() = getBoolean(serviceEnableKey, R.bool.pref_default_services_enable)
 
-    val servicesIntervalKey: String = context.getString(R.string.pref_key_services_interval)
+    val servicesIntervalKey = context.getString(R.string.pref_key_services_interval)
     val servicesInterval: Long
-        get() = sharedPref.getString(servicesIntervalKey, "60")?.toLongOrNull() ?: 60
+        get() = getString(servicesIntervalKey, R.string.pref_default_services_interval).toLong()
 
-    val servicesOnlyWifiKey: String = context.getString(R.string.pref_key_services_wifi_only)
+    val servicesOnlyWifiKey = context.getString(R.string.pref_key_services_wifi_only)
     val isServicesOnlyWifi: Boolean
-        get() = sharedPref.getBoolean(servicesOnlyWifiKey, true)
+        get() = getBoolean(servicesOnlyWifiKey, R.bool.pref_default_services_wifi_only)
 
     val isNotificationsEnable: Boolean
-        get() = sharedPref.getBoolean(context.getString(R.string.pref_key_notifications_enable), true)
+        get() = getBoolean(R.string.pref_key_notifications_enable, R.bool.pref_default_notifications_enable)
 
-    val isDebugNotificationEnableKey: String = context.getString(R.string.pref_key_notification_debug)
+    val isDebugNotificationEnableKey = context.getString(R.string.pref_key_notification_debug)
     val isDebugNotificationEnable: Boolean
-        get() = sharedPref.getBoolean(isDebugNotificationEnableKey, false)
+        get() = getBoolean(isDebugNotificationEnableKey, R.bool.pref_default_notification_debug)
 
     val gradePlusModifier: Double
-        get() = sharedPref.getString(context.getString(R.string.pref_key_grade_modifier_plus), "0.0")?.toDouble() ?: 0.0
+        get() = getString(R.string.pref_key_grade_modifier_plus, R.string.pref_default_grade_modifier_plus).toDouble()
 
     val gradeMinusModifier: Double
-        get() = sharedPref.getString(context.getString(R.string.pref_key_grade_modifier_minus), "0.0")?.toDouble()
-            ?: 0.0
+        get() = getString(R.string.pref_key_grade_modifier_minus, R.string.pref_default_grade_modifier_minus).toDouble()
 
     val fillMessageContent: Boolean
-        get() = sharedPref.getBoolean(context.getString(R.string.pref_key_fill_message_content), true)
+        get() = getBoolean(R.string.pref_key_fill_message_content, R.bool.pref_default_fill_message_content)
+
+    private fun getString(id: Int, default: Int) = getString(context.getString(id), default)
+
+    private fun getString(id: String, default: Int) = sharedPref.getString(id, context.getString(default)) ?: context.getString(default)
+
+    private fun getBoolean(id: Int, default: Int) = getBoolean(context.getString(id), default)
+
+    private fun getBoolean(id: String, default: Int) = sharedPref.getBoolean(id, context.resources.getBoolean(default))
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/recipient/RecipientLocal.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/recipient/RecipientLocal.kt
index 6b8328ec2..9b1d4ac2f 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/recipient/RecipientLocal.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/recipient/RecipientLocal.kt
@@ -15,7 +15,7 @@ class RecipientLocal @Inject constructor(private val recipientDb: RecipientDao)
         return recipientDb.load(student.studentId, role, unit.realId).filter { !it.isEmpty() }
     }
 
-    fun saveRecipients(recipients: List<Recipient>) {
+    fun saveRecipients(recipients: List<Recipient>): List<Long> {
         return recipientDb.insertAll(recipients)
     }
 
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/recipient/RecipientRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/recipient/RecipientRemote.kt
index b726edda9..f070ea765 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/recipient/RecipientRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/recipient/RecipientRemote.kt
@@ -1,34 +1,34 @@
 package io.github.wulkanowy.data.repositories.recipient
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.Message
 import io.github.wulkanowy.data.db.entities.Recipient
 import io.github.wulkanowy.data.db.entities.ReportingUnit
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import javax.inject.Inject
 import javax.inject.Singleton
-import io.github.wulkanowy.api.messages.Recipient as ApiRecipient
+import io.github.wulkanowy.sdk.pojo.Recipient as SdkRecipient
 
 @Singleton
-class RecipientRemote @Inject constructor(private val api: Api) {
+class RecipientRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getRecipients(role: Int, unit: ReportingUnit): Single<List<Recipient>> {
-        return api.getRecipients(unit.realId, role)
+        return sdk.getRecipients(unit.realId, role)
             .map { recipients ->
                 recipients.map { it.toRecipient() }
             }
     }
 
     fun getMessageRecipients(message: Message): Single<List<Recipient>> {
-        return api.getMessageRecipients(message.messageId, message.senderId)
+        return sdk.getMessageRecipients(message.messageId, message.senderId)
             .map { recipients ->
                 recipients.map { it.toRecipient() }
             }
     }
 
-    private fun ApiRecipient.toRecipient(): Recipient {
+    private fun SdkRecipient.toRecipient(): Recipient {
         return Recipient(
-            studentId = api.studentId,
+            studentId = sdk.studentId,
             realId = id,
             realName = name,
             name = shortName,
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/recipient/RecipientRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/recipient/RecipientRepository.kt
index 0b02721f1..d29369b94 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/recipient/RecipientRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/recipient/RecipientRepository.kt
@@ -2,11 +2,12 @@ package io.github.wulkanowy.data.repositories.recipient
 
 import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
-import io.github.wulkanowy.data.ApiHelper
+import io.github.wulkanowy.data.SdkHelper
 import io.github.wulkanowy.data.db.entities.Message
 import io.github.wulkanowy.data.db.entities.Recipient
 import io.github.wulkanowy.data.db.entities.ReportingUnit
 import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Single
 import java.net.UnknownHostException
 import javax.inject.Inject
@@ -17,11 +18,11 @@ class RecipientRepository @Inject constructor(
     private val settings: InternetObservingSettings,
     private val local: RecipientLocal,
     private val remote: RecipientRemote,
-    private val apiHelper: ApiHelper
+    private val sdkHelper: SdkHelper
 ) {
 
     fun getRecipients(student: Student, role: Int, unit: ReportingUnit, forceRefresh: Boolean = false): Single<List<Recipient>> {
-        return Single.just(apiHelper.initApi(student))
+        return Single.just(sdkHelper.init(student))
             .flatMap { _ ->
                 local.getRecipients(student, role, unit).filter { !forceRefresh }
                     .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
@@ -31,8 +32,8 @@ class RecipientRepository @Inject constructor(
                         }.flatMap { new ->
                             local.getRecipients(student, role, unit).toSingle(emptyList())
                                 .doOnSuccess { old ->
-                                    local.deleteRecipients(old - new)
-                                    local.saveRecipients(new - old)
+                                    local.deleteRecipients(old.uniqueSubtract(new))
+                                    local.saveRecipients(new.uniqueSubtract(old))
                                 }
                         }.flatMap {
                             local.getRecipients(student, role, unit).toSingle(emptyList())
@@ -42,7 +43,7 @@ class RecipientRepository @Inject constructor(
     }
 
     fun getMessageRecipients(student: Student, message: Message): Single<List<Recipient>> {
-        return Single.just(apiHelper.initApi(student))
+        return Single.just(sdkHelper.init(student))
             .flatMap { ReactiveNetwork.checkInternetConnectivity(settings) }
             .flatMap {
                 if (it) remote.getMessageRecipients(message)
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/reportingunit/ReportingUnitLocal.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/reportingunit/ReportingUnitLocal.kt
index b4281cbfd..6f9eec3fc 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/reportingunit/ReportingUnitLocal.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/reportingunit/ReportingUnitLocal.kt
@@ -18,7 +18,7 @@ class ReportingUnitLocal @Inject constructor(private val reportingUnitDb: Report
         return reportingUnitDb.loadOne(student.studentId, unitId)
     }
 
-    fun saveReportingUnits(reportingUnits: List<ReportingUnit>) {
+    fun saveReportingUnits(reportingUnits: List<ReportingUnit>): List<Long> {
         return reportingUnitDb.insertAll(reportingUnits)
     }
 
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/reportingunit/ReportingUnitRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/reportingunit/ReportingUnitRemote.kt
index feb4b0134..5dbabc545 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/reportingunit/ReportingUnitRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/reportingunit/ReportingUnitRemote.kt
@@ -1,19 +1,19 @@
 package io.github.wulkanowy.data.repositories.reportingunit
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.ReportingUnit
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class ReportingUnitRemote @Inject constructor(private val api: Api) {
+class ReportingUnitRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getReportingUnits(): Single<List<ReportingUnit>> {
-        return api.getReportingUnits().map {
+        return sdk.getReportingUnits().map {
             it.map { unit ->
                 ReportingUnit(
-                    studentId = api.studentId,
+                    studentId = sdk.studentId,
                     realId = unit.id,
                     roles = unit.roles,
                     senderId = unit.senderId,
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/reportingunit/ReportingUnitRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/reportingunit/ReportingUnitRepository.kt
index 9184b4bb1..4c8370e68 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/reportingunit/ReportingUnitRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/reportingunit/ReportingUnitRepository.kt
@@ -2,9 +2,10 @@ package io.github.wulkanowy.data.repositories.reportingunit
 
 import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
-import io.github.wulkanowy.data.ApiHelper
+import io.github.wulkanowy.data.SdkHelper
 import io.github.wulkanowy.data.db.entities.ReportingUnit
 import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Maybe
 import io.reactivex.Single
 import java.net.UnknownHostException
@@ -16,11 +17,11 @@ class ReportingUnitRepository @Inject constructor(
     private val settings: InternetObservingSettings,
     private val local: ReportingUnitLocal,
     private val remote: ReportingUnitRemote,
-    private val apiHelper: ApiHelper
+    private val sdkHelper: SdkHelper
 ) {
 
     fun getReportingUnits(student: Student, forceRefresh: Boolean = false): Single<List<ReportingUnit>> {
-        return Single.just(apiHelper.initApi(student))
+        return Single.just(sdkHelper.init(student))
             .flatMap { _ ->
                 local.getReportingUnits(student).filter { !forceRefresh }
                     .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
@@ -30,8 +31,8 @@ class ReportingUnitRepository @Inject constructor(
                         }.flatMap { new ->
                             local.getReportingUnits(student).toSingle(emptyList())
                                 .doOnSuccess { old ->
-                                    local.deleteReportingUnits(old - new)
-                                    local.saveReportingUnits(new - old)
+                                    local.deleteReportingUnits(old.uniqueSubtract(new))
+                                    local.saveReportingUnits(new.uniqueSubtract(old))
                                 }
                         }.flatMap { local.getReportingUnits(student).toSingle(emptyList()) }
                     )
@@ -39,7 +40,7 @@ class ReportingUnitRepository @Inject constructor(
     }
 
     fun getReportingUnit(student: Student, unitId: Int): Maybe<ReportingUnit> {
-        return Maybe.just(apiHelper.initApi(student))
+        return Maybe.just(sdkHelper.init(student))
             .flatMap { _ ->
                 local.getReportingUnit(student, unitId)
                     .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/school/SchoolLocal.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/school/SchoolLocal.kt
new file mode 100644
index 000000000..d87272875
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/school/SchoolLocal.kt
@@ -0,0 +1,22 @@
+package io.github.wulkanowy.data.repositories.school
+
+import io.github.wulkanowy.data.db.dao.SchoolDao
+import io.github.wulkanowy.data.db.entities.School
+import io.github.wulkanowy.data.db.entities.Semester
+import io.reactivex.Maybe
+import javax.inject.Inject
+
+class SchoolLocal @Inject constructor(private val schoolDb: SchoolDao) {
+
+    fun saveSchool(school: School) {
+        schoolDb.insertAll(listOf(school))
+    }
+
+    fun deleteSchool(school: School) {
+        schoolDb.deleteAll(listOf(school))
+    }
+
+    fun getSchool(semester: Semester): Maybe<School> {
+        return schoolDb.load(semester.studentId, semester.classId)
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/school/SchoolRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/school/SchoolRemote.kt
new file mode 100644
index 000000000..4d5c92a9e
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/school/SchoolRemote.kt
@@ -0,0 +1,25 @@
+package io.github.wulkanowy.data.repositories.school
+
+import io.github.wulkanowy.data.db.entities.School
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.sdk.Sdk
+import io.reactivex.Single
+import javax.inject.Inject
+
+class SchoolRemote @Inject constructor(private val sdk: Sdk) {
+
+    fun getSchoolInfo(semester: Semester): Single<School> {
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getSchool()
+            .map {
+                School(
+                    studentId = semester.studentId,
+                    classId = semester.classId,
+                    name = it.name,
+                    address = it.address,
+                    contact = it.contact,
+                    headmaster = it.headmaster,
+                    pedagogue = it.pedagogue
+                )
+            }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/school/SchoolRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/school/SchoolRepository.kt
new file mode 100644
index 000000000..a352324d2
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/school/SchoolRepository.kt
@@ -0,0 +1,41 @@
+package io.github.wulkanowy.data.repositories.school
+
+import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
+import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
+import io.github.wulkanowy.data.db.entities.School
+import io.github.wulkanowy.data.db.entities.Semester
+import io.reactivex.Maybe
+import io.reactivex.Single
+import java.net.UnknownHostException
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class SchoolRepository @Inject constructor(
+    private val settings: InternetObservingSettings,
+    private val local: SchoolLocal,
+    private val remote: SchoolRemote
+) {
+
+    fun getSchoolInfo(semester: Semester, forceRefresh: Boolean = false): Maybe<School> {
+        return local.getSchool(semester).filter { !forceRefresh }
+            .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
+                .flatMap {
+                    if (it) remote.getSchoolInfo(semester)
+                    else Single.error(UnknownHostException())
+                }.flatMapMaybe { new ->
+                    local.getSchool(semester)
+                        .doOnSuccess { old ->
+                            if (new != old) {
+                                local.deleteSchool(old)
+                                local.saveSchool(new)
+                            }
+                        }
+                        .doOnComplete {
+                            local.saveSchool(new)
+                        }
+                }.flatMap({ local.getSchool(semester) }, { Maybe.error(it) },
+                    { local.getSchool(semester) })
+            )
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/semester/SemesterRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/semester/SemesterRemote.kt
index c199c16c0..55d13a765 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/semester/SemesterRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/semester/SemesterRemote.kt
@@ -1,35 +1,32 @@
 package io.github.wulkanowy.data.repositories.semester
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class SemesterRemote @Inject constructor(private val api: Api) {
+class SemesterRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getSemesters(student: Student): Single<List<Semester>> {
-        return api.getSemesters().map { semesters ->
-            semesters.map { semester ->
+        return sdk.getSemesters().map { semesters ->
+            semesters.map {
                 Semester(
                     studentId = student.studentId,
-                    diaryId = semester.diaryId,
-                    diaryName = semester.diaryName,
-                    schoolYear = semester.schoolYear,
-                    semesterId = semester.semesterId,
-                    semesterName = semester.semesterNumber,
-                    isCurrent = semester.current,
-                    start = semester.start,
-                    end = semester.end,
-                    classId = semester.classId,
-                    unitId = semester.unitId
+                    diaryId = it.diaryId,
+                    diaryName = it.diaryName,
+                    schoolYear = it.schoolYear,
+                    semesterId = it.semesterId,
+                    semesterName = it.semesterNumber,
+                    isCurrent = it.current,
+                    start = it.start,
+                    end = it.end,
+                    classId = it.classId,
+                    unitId = it.unitId
                 )
             }
-
         }
     }
 }
-
-
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/semester/SemesterRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/semester/SemesterRepository.kt
index 9735f0290..95fddc1b3 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/semester/SemesterRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/semester/SemesterRepository.kt
@@ -2,9 +2,10 @@ package io.github.wulkanowy.data.repositories.semester
 
 import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
-import io.github.wulkanowy.data.ApiHelper
+import io.github.wulkanowy.data.SdkHelper
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Maybe
 import io.reactivex.Single
 import timber.log.Timber
@@ -17,11 +18,11 @@ class SemesterRepository @Inject constructor(
     private val remote: SemesterRemote,
     private val local: SemesterLocal,
     private val settings: InternetObservingSettings,
-    private val apiHelper: ApiHelper
+    private val sdkHelper: SdkHelper
 ) {
 
     fun getSemesters(student: Student, forceRefresh: Boolean = false): Single<List<Semester>> {
-        return Maybe.just(apiHelper.initApi(student))
+        return Maybe.just(sdkHelper.init(student))
             .flatMap { local.getSemesters(student).filter { !forceRefresh } }
             .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
                 .flatMap {
@@ -31,8 +32,8 @@ class SemesterRepository @Inject constructor(
                     if (currentSemesters.size == 1) {
                         local.getSemesters(student).toSingle(emptyList())
                             .doOnSuccess { old ->
-                                local.deleteSemesters(old - new)
-                                local.saveSemesters(new - old)
+                                local.deleteSemesters(old.uniqueSubtract(new))
+                                local.saveSemesters(new.uniqueSubtract(old))
                             }
                     } else {
                         Timber.i("Current semesters list:\n${currentSemesters.joinToString(separator = "\n")}")
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/student/StudentLocal.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/student/StudentLocal.kt
index 7bbd283fb..a3576ca22 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/student/StudentLocal.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/student/StudentLocal.kt
@@ -3,6 +3,7 @@ package io.github.wulkanowy.data.repositories.student
 import android.content.Context
 import io.github.wulkanowy.data.db.dao.StudentDao
 import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.sdk.Sdk
 import io.github.wulkanowy.utils.security.decrypt
 import io.github.wulkanowy.utils.security.encrypt
 import io.reactivex.Completable
@@ -17,18 +18,27 @@ class StudentLocal @Inject constructor(
     private val context: Context
 ) {
 
-    fun saveStudent(student: Student): Single<Long> {
-        return Single.fromCallable { studentDb.insert(student.copy(password = encrypt(student.password, context))) }
+    fun saveStudents(students: List<Student>): Single<List<Long>> {
+        return Single.fromCallable {
+            studentDb.insertAll(students.map {
+                if (Sdk.Mode.valueOf(it.loginMode) != Sdk.Mode.API) it.copy(password = encrypt(it.password, context))
+                else it
+            })
+        }
     }
 
     fun getStudents(decryptPass: Boolean): Maybe<List<Student>> {
         return studentDb.loadAll()
             .map { list -> list.map { it.apply { if (decryptPass) password = decrypt(password) } } }
-            .filter { !it.isEmpty() }
+            .filter { it.isNotEmpty() }
     }
 
     fun getCurrentStudent(decryptPass: Boolean): Maybe<Student> {
-        return studentDb.loadCurrent().map { it.apply { if (decryptPass) password = decrypt(password) } }
+        return studentDb.loadCurrent().map {
+            it.apply {
+                if (decryptPass && Sdk.Mode.valueOf(loginMode) != Sdk.Mode.API) password = decrypt(password)
+            }
+        }
     }
 
     fun setCurrentStudent(student: Student): Completable {
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/student/StudentRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/student/StudentRemote.kt
index 251d38344..944313082 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/student/StudentRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/student/StudentRemote.kt
@@ -1,34 +1,51 @@
 package io.github.wulkanowy.data.repositories.student
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import org.threeten.bp.LocalDateTime.now
 import javax.inject.Inject
 import javax.inject.Singleton
+import io.github.wulkanowy.sdk.pojo.Student as SdkStudent
 
 @Singleton
-class StudentRemote @Inject constructor(private val api: Api) {
+class StudentRemote @Inject constructor(private val sdk: Sdk) {
 
-    fun getStudents(email: String, password: String, endpoint: String): Single<List<Student>> {
-        return api.getStudents().map { students ->
-            students.map { student ->
-                Student(
-                    email = email,
-                    password = password,
-                    symbol = student.symbol,
-                    studentId = student.studentId,
-                    studentName = student.studentName,
-                    schoolSymbol = student.schoolSymbol,
-                    schoolName = student.schoolName,
-                    className = student.className,
-                    classId = student.classId,
-                    endpoint = endpoint,
-                    loginType = student.loginType.name,
-                    isCurrent = false,
-                    registrationDate = now()
-                )
-            }
+    private fun mapStudents(students: List<SdkStudent>, email: String, password: String): List<Student> {
+        return students.map { student ->
+            Student(
+                email = email,
+                password = password,
+                isParent = student.isParent,
+                symbol = student.symbol,
+                studentId = student.studentId,
+                userLoginId = student.userLoginId,
+                studentName = student.studentName,
+                schoolSymbol = student.schoolSymbol,
+                schoolName = student.schoolName,
+                className = student.className,
+                classId = student.classId,
+                scrapperBaseUrl = student.scrapperBaseUrl,
+                loginType = student.loginType.name,
+                isCurrent = false,
+                registrationDate = now(),
+                mobileBaseUrl = student.mobileBaseUrl,
+                privateKey = student.privateKey,
+                certificateKey = student.certificateKey,
+                loginMode = student.loginMode.name
+            )
         }
     }
+
+    fun getStudentsMobileApi(token: String, pin: String, symbol: String): Single<List<Student>> {
+        return sdk.getStudentsFromMobileApi(token, pin, symbol).map { mapStudents(it, "", "") }
+    }
+
+    fun getStudentsScrapper(email: String, password: String, scrapperBaseUrl: String, symbol: String): Single<List<Student>> {
+        return sdk.getStudentsFromScrapper(email, password, scrapperBaseUrl, symbol).map { mapStudents(it, email, password) }
+    }
+
+    fun getStudentsHybrid(email: String, password: String, scrapperBaseUrl: String, symbol: String): Single<List<Student>> {
+        return sdk.getStudentsHybrid(email, password, scrapperBaseUrl, symbol).map { mapStudents(it, email, password) }
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/student/StudentRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/student/StudentRepository.kt
index b4b7c8289..e06e654a9 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/student/StudentRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/student/StudentRepository.kt
@@ -2,7 +2,6 @@ package io.github.wulkanowy.data.repositories.student
 
 import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
-import io.github.wulkanowy.data.ApiHelper
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.exceptions.NoCurrentStudentException
 import io.reactivex.Completable
@@ -16,19 +15,32 @@ import javax.inject.Singleton
 class StudentRepository @Inject constructor(
     private val local: StudentLocal,
     private val remote: StudentRemote,
-    private val settings: InternetObservingSettings,
-    private val apiHelper: ApiHelper
+    private val settings: InternetObservingSettings
 ) {
 
     fun isStudentSaved(): Single<Boolean> = local.getStudents(false).isEmpty.map { !it }
 
-    fun getStudents(email: String, password: String, endpoint: String, symbol: String = ""): Single<List<Student>> {
-        return ReactiveNetwork.checkInternetConnectivity(settings)
-            .flatMap {
-                apiHelper.initApi(email, password, symbol, endpoint)
-                if (it) remote.getStudents(email, password, endpoint)
-                else Single.error(UnknownHostException("No internet connection"))
-            }
+    fun isCurrentStudentSet(): Single<Boolean> = local.getCurrentStudent(false).isEmpty.map { !it }
+
+    fun getStudentsApi(pin: String, symbol: String, token: String): Single<List<Student>> {
+        return ReactiveNetwork.checkInternetConnectivity(settings).flatMap {
+            if (it) remote.getStudentsMobileApi(token, pin, symbol)
+            else Single.error(UnknownHostException("No internet connection"))
+        }
+    }
+
+    fun getStudentsScrapper(email: String, password: String, endpoint: String, symbol: String = ""): Single<List<Student>> {
+        return ReactiveNetwork.checkInternetConnectivity(settings).flatMap {
+            if (it) remote.getStudentsScrapper(email, password, endpoint, symbol)
+            else Single.error(UnknownHostException("No internet connection"))
+        }
+    }
+
+    fun getStudentsHybrid(email: String, password: String, endpoint: String, symbol: String): Single<List<Student>> {
+        return ReactiveNetwork.checkInternetConnectivity(settings).flatMap {
+            if (it) remote.getStudentsHybrid(email, password, endpoint, symbol)
+            else Single.error(UnknownHostException("No internet connection"))
+        }
     }
 
     fun getSavedStudents(decryptPass: Boolean = true): Single<List<Student>> {
@@ -41,8 +53,8 @@ class StudentRepository @Inject constructor(
             .toSingle()
     }
 
-    fun saveStudent(student: Student): Single<Long> {
-        return local.saveStudent(student)
+    fun saveStudents(students: List<Student>): Single<List<Long>> {
+        return local.saveStudents(students)
     }
 
     fun switchStudent(student: Student): Completable {
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/subject/SubjectRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/subject/SubjectRemote.kt
index 88fbb196b..32dbb2f2e 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/subject/SubjectRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/subject/SubjectRemote.kt
@@ -1,25 +1,24 @@
 package io.github.wulkanowy.data.repositories.subject
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Subject
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class SubjectRemote @Inject constructor(private val api: Api) {
+class SubjectRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getSubjects(semester: Semester): Single<List<Subject>> {
-        return Single.just(api.apply { diaryId = semester.diaryId })
-            .flatMap { api.getSubjects() }
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getSubjects()
             .map { subjects ->
                 subjects.map {
                     Subject(
                         studentId = semester.studentId,
                         diaryId = semester.diaryId,
                         name = it.name,
-                        realId = it.value
+                        realId = it.id
                     )
                 }
             }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/subject/SubjectRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/subject/SubjectRepository.kt
index 6167251b9..0c5f386b6 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/subject/SubjectRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/subject/SubjectRepository.kt
@@ -4,6 +4,7 @@ import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Subject
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Single
 import java.net.UnknownHostException
 import javax.inject.Inject
@@ -26,8 +27,8 @@ class SubjectRepository @Inject constructor(
                     local.getSubjects(semester)
                         .toSingle(emptyList())
                         .doOnSuccess { old ->
-                            local.deleteSubjects(old - new)
-                            local.saveSubjects(new - old)
+                            local.deleteSubjects(old.uniqueSubtract(new))
+                            local.saveSubjects(new.uniqueSubtract(old))
                         }
                 }.flatMap {
                     local.getSubjects(semester).toSingle(emptyList())
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/teacher/TeacherLocal.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/teacher/TeacherLocal.kt
new file mode 100644
index 000000000..dd2be5e58
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/teacher/TeacherLocal.kt
@@ -0,0 +1,22 @@
+package io.github.wulkanowy.data.repositories.teacher
+
+import io.github.wulkanowy.data.db.dao.TeacherDao
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.db.entities.Teacher
+import io.reactivex.Maybe
+import javax.inject.Inject
+
+class TeacherLocal @Inject constructor(private val teacherDb: TeacherDao) {
+
+    fun saveTeachers(teachers: List<Teacher>) {
+        teacherDb.insertAll(teachers)
+    }
+
+    fun deleteTeachers(teachers: List<Teacher>) {
+        teacherDb.deleteAll(teachers)
+    }
+
+    fun getTeachers(semester: Semester): Maybe<List<Teacher>> {
+        return teacherDb.loadAll(semester.studentId, semester.classId).filter { it.isNotEmpty() }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/teacher/TeacherRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/teacher/TeacherRemote.kt
new file mode 100644
index 000000000..d4401bfb2
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/teacher/TeacherRemote.kt
@@ -0,0 +1,27 @@
+package io.github.wulkanowy.data.repositories.teacher
+
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.db.entities.Teacher
+import io.github.wulkanowy.sdk.Sdk
+import io.reactivex.Single
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class TeacherRemote @Inject constructor(private val sdk: Sdk) {
+
+    fun getTeachers(semester: Semester): Single<List<Teacher>> {
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getTeachers(semester.semesterId)
+            .map { teachers ->
+                teachers.map {
+                    Teacher(
+                        studentId = semester.studentId,
+                        name = it.name,
+                        subject = it.subject,
+                        shortName = it.short,
+                        classId = semester.classId
+                    )
+                }
+            }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/teacher/TeacherRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/teacher/TeacherRepository.kt
new file mode 100644
index 000000000..19e7a32b8
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/teacher/TeacherRepository.kt
@@ -0,0 +1,34 @@
+package io.github.wulkanowy.data.repositories.teacher
+
+import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
+import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.db.entities.Teacher
+import io.github.wulkanowy.utils.uniqueSubtract
+import io.reactivex.Single
+import java.net.UnknownHostException
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class TeacherRepository @Inject constructor(
+    private val settings: InternetObservingSettings,
+    private val local: TeacherLocal,
+    private val remote: TeacherRemote
+) {
+
+    fun getTeachers(semester: Semester, forceRefresh: Boolean = false): Single<List<Teacher>> {
+        return local.getTeachers(semester).filter { !forceRefresh }
+            .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
+                .flatMap {
+                    if (it) remote.getTeachers(semester)
+                    else Single.error(UnknownHostException())
+                }.flatMap { new ->
+                    local.getTeachers(semester).toSingle(emptyList())
+                        .doOnSuccess { old ->
+                            local.deleteTeachers(old.uniqueSubtract(new))
+                            local.saveTeachers(new.uniqueSubtract(old))
+                        }
+                }.flatMap { local.getTeachers(semester).toSingle(emptyList()) })
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/timetable/TimetableRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/timetable/TimetableRemote.kt
index 77742e7b3..6036bd405 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/timetable/TimetableRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/timetable/TimetableRemote.kt
@@ -1,30 +1,27 @@
 package io.github.wulkanowy.data.repositories.timetable
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Timetable
-import io.github.wulkanowy.utils.toLocalDate
-import io.github.wulkanowy.utils.toLocalDateTime
+import io.github.wulkanowy.sdk.Sdk
 import io.reactivex.Single
 import org.threeten.bp.LocalDate
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class TimetableRemote @Inject constructor(private val api: Api) {
+class TimetableRemote @Inject constructor(private val sdk: Sdk) {
 
     fun getTimetable(semester: Semester, startDate: LocalDate, endDate: LocalDate): Single<List<Timetable>> {
-        return Single.just(api.apply { diaryId = semester.diaryId })
-            .flatMap { it.getTimetable(startDate, endDate) }
+        return sdk.switchDiary(semester.diaryId, semester.schoolYear).getTimetable(startDate, endDate)
             .map { lessons ->
                 lessons.map {
                     Timetable(
                         studentId = semester.studentId,
                         diaryId = semester.diaryId,
                         number = it.number,
-                        start = it.start.toLocalDateTime(),
-                        end = it.end.toLocalDateTime(),
-                        date = it.date.toLocalDate(),
+                        start = it.start,
+                        end = it.end,
+                        date = it.date,
                         subject = it.subject,
                         subjectOld = it.subjectOld,
                         group = it.group,
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/timetable/TimetableRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/timetable/TimetableRepository.kt
index 460d55fd7..20e183c25 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/timetable/TimetableRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/timetable/TimetableRepository.kt
@@ -6,6 +6,7 @@ import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Timetable
 import io.github.wulkanowy.utils.friday
 import io.github.wulkanowy.utils.monday
+import io.github.wulkanowy.utils.uniqueSubtract
 import io.reactivex.Single
 import org.threeten.bp.LocalDate
 import java.net.UnknownHostException
@@ -25,17 +26,17 @@ class TimetableRepository @Inject constructor(
                 .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings).flatMap {
                     if (it) remote.getTimetable(semester, monday, friday)
                     else Single.error(UnknownHostException())
-                }.flatMap { newTimetable ->
+                }.flatMap { new ->
                     local.getTimetable(semester, monday, friday)
                         .toSingle(emptyList())
-                        .doOnSuccess { oldTimetable ->
-                            local.deleteTimetable(oldTimetable - newTimetable)
-                            local.saveTimetable((newTimetable - oldTimetable).map { item ->
-                                item.apply {
-                                    oldTimetable.singleOrNull { this.start == it.start }?.let {
-                                        return@map copy(
-                                            room = if (room.isEmpty()) it.room else room,
-                                            teacher = if (teacher.isEmpty()) it.teacher else teacher
+                        .doOnSuccess { old ->
+                            local.deleteTimetable(old.uniqueSubtract(new))
+                            local.saveTimetable(new.uniqueSubtract(old).map { item ->
+                                item.also { new ->
+                                    old.singleOrNull { new.start == it.start }?.let { old ->
+                                        return@map new.copy(
+                                            room = if (new.room.isEmpty()) old.room else new.room,
+                                            teacher = if (new.teacher.isEmpty() && !new.changes && !old.changes) old.teacher else new.teacher
                                         )
                                     }
                                 }
diff --git a/app/src/main/java/io/github/wulkanowy/di/AppComponent.kt b/app/src/main/java/io/github/wulkanowy/di/AppComponent.kt
index 9e8b24ab8..c0329f7d7 100644
--- a/app/src/main/java/io/github/wulkanowy/di/AppComponent.kt
+++ b/app/src/main/java/io/github/wulkanowy/di/AppComponent.kt
@@ -14,9 +14,9 @@ import javax.inject.Singleton
     AppModule::class,
     RepositoryModule::class,
     ServicesModule::class,
-    BuilderModule::class])
+    BindingModule::class])
 interface AppComponent : AndroidInjector<WulkanowyApp> {
 
-    @Component.Builder
-    abstract class Builder : AndroidInjector.Builder<WulkanowyApp>()
+    @Component.Factory
+    interface Factory : AndroidInjector.Factory<WulkanowyApp>
 }
diff --git a/app/src/main/java/io/github/wulkanowy/di/AppModule.kt b/app/src/main/java/io/github/wulkanowy/di/AppModule.kt
index eb3b18f99..4f5683850 100644
--- a/app/src/main/java/io/github/wulkanowy/di/AppModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/di/AppModule.kt
@@ -2,16 +2,14 @@ package io.github.wulkanowy.di
 
 import android.appwidget.AppWidgetManager
 import android.content.Context
-import com.google.firebase.analytics.FirebaseAnalytics
+import com.yariksoffice.lingver.Lingver
 import dagger.Module
 import dagger.Provides
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import io.github.wulkanowy.BuildConfig.DEBUG
 import io.github.wulkanowy.WulkanowyApp
-import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.AppInfo
 import io.github.wulkanowy.utils.SchedulersProvider
-import javax.inject.Named
 import javax.inject.Singleton
 
 @Module
@@ -30,14 +28,13 @@ internal class AppModule {
 
     @Singleton
     @Provides
-    fun provideFirebaseAnalyticsHelper(context: Context) = FirebaseAnalyticsHelper(FirebaseAnalytics.getInstance(context))
+    fun provideAppWidgetManager(context: Context): AppWidgetManager = AppWidgetManager.getInstance(context)
 
     @Singleton
     @Provides
-    fun provideAppWidgetManager(context: Context) = AppWidgetManager.getInstance(context)
+    fun provideAppInfo() = AppInfo()
 
     @Singleton
-    @Named("isDebug")
     @Provides
-    fun provideIsDebug() = DEBUG
+    fun provideLingver() = Lingver.getInstance()
 }
diff --git a/app/src/main/java/io/github/wulkanowy/di/BuilderModule.kt b/app/src/main/java/io/github/wulkanowy/di/BindingModule.kt
similarity index 59%
rename from app/src/main/java/io/github/wulkanowy/di/BuilderModule.kt
rename to app/src/main/java/io/github/wulkanowy/di/BindingModule.kt
index 7f4776304..98061e609 100644
--- a/app/src/main/java/io/github/wulkanowy/di/BuilderModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/di/BindingModule.kt
@@ -5,14 +5,18 @@ import dagger.android.ContributesAndroidInjector
 import io.github.wulkanowy.di.scopes.PerActivity
 import io.github.wulkanowy.ui.modules.login.LoginActivity
 import io.github.wulkanowy.ui.modules.login.LoginModule
+import io.github.wulkanowy.ui.modules.luckynumberwidget.LuckyNumberWidgetConfigureActivity
+import io.github.wulkanowy.ui.modules.luckynumberwidget.LuckyNumberWidgetProvider
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainModule
 import io.github.wulkanowy.ui.modules.message.send.SendMessageActivity
 import io.github.wulkanowy.ui.modules.splash.SplashActivity
-import io.github.wulkanowy.ui.widgets.timetable.TimetableWidgetProvider
+import io.github.wulkanowy.ui.modules.timetablewidget.TimetableWidgetConfigureActivity
+import io.github.wulkanowy.ui.modules.timetablewidget.TimetableWidgetProvider
 
+@Suppress("unused")
 @Module
-internal abstract class BuilderModule {
+internal abstract class BindingModule {
 
     @PerActivity
     @ContributesAndroidInjector
@@ -29,6 +33,15 @@ internal abstract class BuilderModule {
     @ContributesAndroidInjector
     abstract fun bindMessageSendActivity(): SendMessageActivity
 
+    @ContributesAndroidInjector
+    abstract fun bindTimetableWidgetAccountActivity(): TimetableWidgetConfigureActivity
+
     @ContributesAndroidInjector
     abstract fun bindTimetableWidgetProvider(): TimetableWidgetProvider
+
+    @ContributesAndroidInjector
+    abstract fun bindLuckyNumberWidgetAccountActivity(): LuckyNumberWidgetConfigureActivity
+
+    @ContributesAndroidInjector
+    abstract fun bindLuckyNumberWidgetProvider(): LuckyNumberWidgetProvider
 }
diff --git a/app/src/main/java/io/github/wulkanowy/services/ServicesModule.kt b/app/src/main/java/io/github/wulkanowy/services/ServicesModule.kt
index 84409a845..78bdbd8c0 100644
--- a/app/src/main/java/io/github/wulkanowy/services/ServicesModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/services/ServicesModule.kt
@@ -1,8 +1,6 @@
 package io.github.wulkanowy.services
 
-import android.app.NotificationManager
 import android.content.Context
-import android.content.Context.NOTIFICATION_SERVICE
 import androidx.core.app.NotificationManagerCompat
 import androidx.work.WorkManager
 import com.squareup.inject.assisted.dagger2.AssistedModule
@@ -23,31 +21,26 @@ import io.github.wulkanowy.services.sync.works.LuckyNumberWork
 import io.github.wulkanowy.services.sync.works.MessageWork
 import io.github.wulkanowy.services.sync.works.NoteWork
 import io.github.wulkanowy.services.sync.works.RecipientWork
+import io.github.wulkanowy.services.sync.works.TeacherWork
 import io.github.wulkanowy.services.sync.works.TimetableWork
 import io.github.wulkanowy.services.sync.works.Work
 import io.github.wulkanowy.services.widgets.TimetableWidgetService
 import javax.inject.Singleton
 
+@Suppress("unused")
 @AssistedModule
-@Module(includes = [AssistedInject_ServicesModule::class])
+@Module(includes = [AssistedInject_ServicesModule::class, ServicesModule.Static::class])
 abstract class ServicesModule {
 
     @Module
-    companion object {
+    object Static {
 
-        @JvmStatic
         @Provides
-        fun provideWorkManager() = WorkManager.getInstance()
+        fun provideWorkManager(context: Context) = WorkManager.getInstance(context)
 
-        @JvmStatic
         @Singleton
         @Provides
-        fun provideNotificationManagerCompat(context: Context) = NotificationManagerCompat.from(context)
-
-        @JvmStatic
-        @Singleton
-        @Provides
-        fun provideNotificationManager(context: Context) = context.getSystemService(NOTIFICATION_SERVICE) as NotificationManager
+        fun provideNotificationManager(context: Context) = NotificationManagerCompat.from(context)
     }
 
     @ContributesAndroidInjector
@@ -81,6 +74,10 @@ abstract class ServicesModule {
     @IntoSet
     abstract fun provideTimetableWork(work: TimetableWork): Work
 
+    @Binds
+    @IntoSet
+    abstract fun provideTeacherWork(work: TeacherWork): Work
+
     @Binds
     @IntoSet
     abstract fun provideLuckyNumberWork(work: LuckyNumberWork): Work
diff --git a/app/src/main/java/io/github/wulkanowy/services/sync/SyncManager.kt b/app/src/main/java/io/github/wulkanowy/services/sync/SyncManager.kt
index c1820afb9..6b0469773 100644
--- a/app/src/main/java/io/github/wulkanowy/services/sync/SyncManager.kt
+++ b/app/src/main/java/io/github/wulkanowy/services/sync/SyncManager.kt
@@ -6,44 +6,56 @@ import androidx.work.BackoffPolicy.EXPONENTIAL
 import androidx.work.Constraints
 import androidx.work.ExistingPeriodicWorkPolicy.KEEP
 import androidx.work.ExistingPeriodicWorkPolicy.REPLACE
-import androidx.work.NetworkType.METERED
+import androidx.work.NetworkType.CONNECTED
 import androidx.work.NetworkType.UNMETERED
-import androidx.work.PeriodicWorkRequest
+import androidx.work.PeriodicWorkRequestBuilder
 import androidx.work.WorkManager
+import io.github.wulkanowy.data.db.SharedPrefProvider
+import io.github.wulkanowy.data.db.SharedPrefProvider.Companion.APP_VERSION_CODE_KEY
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.services.sync.channels.DebugChannel
 import io.github.wulkanowy.services.sync.channels.NewEntriesChannel
+import io.github.wulkanowy.utils.AppInfo
 import io.github.wulkanowy.utils.isHolidays
 import org.threeten.bp.LocalDate.now
 import timber.log.Timber
 import java.util.concurrent.TimeUnit.MINUTES
 import javax.inject.Inject
-import javax.inject.Named
 import javax.inject.Singleton
 
 @Singleton
 class SyncManager @Inject constructor(
     private val workManager: WorkManager,
     private val preferencesRepository: PreferencesRepository,
+    sharedPrefProvider: SharedPrefProvider,
     newEntriesChannel: NewEntriesChannel,
     debugChannel: DebugChannel,
-    @Named("isDebug") isDebug: Boolean
+    appInfo: AppInfo
 ) {
 
     init {
-        if (SDK_INT >= O) newEntriesChannel.create()
-        if (SDK_INT >= O && isDebug) debugChannel.create()
         if (now().isHolidays) stopSyncWorker()
+
+        if (SDK_INT > O) {
+            newEntriesChannel.create()
+            if (appInfo.isDebug) debugChannel.create()
+        }
+
+        if (sharedPrefProvider.getLong(APP_VERSION_CODE_KEY, -1L) != appInfo.versionCode.toLong()) {
+            startSyncWorker(true)
+            sharedPrefProvider.putLong(APP_VERSION_CODE_KEY, appInfo.versionCode.toLong(), true)
+        }
         Timber.i("SyncManager was initialized")
     }
 
     fun startSyncWorker(restart: Boolean = false) {
         if (preferencesRepository.isServiceEnabled && !now().isHolidays) {
             workManager.enqueueUniquePeriodicWork(SyncWorker::class.java.simpleName, if (restart) REPLACE else KEEP,
-                PeriodicWorkRequest.Builder(SyncWorker::class.java, preferencesRepository.servicesInterval, MINUTES, 10, MINUTES)
+                PeriodicWorkRequestBuilder<SyncWorker>(preferencesRepository.servicesInterval, MINUTES)
+                    .setInitialDelay(10, MINUTES)
                     .setBackoffCriteria(EXPONENTIAL, 30, MINUTES)
                     .setConstraints(Constraints.Builder()
-                        .setRequiredNetworkType(if (preferencesRepository.isServicesOnlyWifi) METERED else UNMETERED)
+                        .setRequiredNetworkType(if (preferencesRepository.isServicesOnlyWifi) UNMETERED else CONNECTED)
                         .build())
                     .build())
         }
diff --git a/app/src/main/java/io/github/wulkanowy/services/sync/SyncWorker.kt b/app/src/main/java/io/github/wulkanowy/services/sync/SyncWorker.kt
index 134fb0344..68702d9a9 100644
--- a/app/src/main/java/io/github/wulkanowy/services/sync/SyncWorker.kt
+++ b/app/src/main/java/io/github/wulkanowy/services/sync/SyncWorker.kt
@@ -11,10 +11,10 @@ import androidx.work.WorkerParameters
 import com.squareup.inject.assisted.Assisted
 import com.squareup.inject.assisted.AssistedInject
 import io.github.wulkanowy.R
-import io.github.wulkanowy.api.interceptor.FeatureDisabledException
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.sdk.exception.FeatureDisabledException
 import io.github.wulkanowy.services.sync.channels.DebugChannel
 import io.github.wulkanowy.services.sync.works.Work
 import io.github.wulkanowy.utils.getCompatColor
@@ -35,7 +35,7 @@ class SyncWorker @AssistedInject constructor(
 
     override fun createWork(): Single<Result> {
         Timber.i("SyncWorker is starting")
-        return studentRepository.isStudentSaved()
+        return studentRepository.isCurrentStudentSet()
             .filter { true }
             .flatMap { studentRepository.getCurrentStudent().toMaybe() }
             .flatMapCompletable { student ->
@@ -64,7 +64,7 @@ class SyncWorker @AssistedInject constructor(
     private fun notify(result: Result) {
         notificationManager.notify(Random.nextInt(Int.MAX_VALUE), NotificationCompat.Builder(applicationContext, DebugChannel.CHANNEL_ID)
             .setContentTitle("Debug notification")
-            .setSmallIcon(R.drawable.ic_more_settings_24dp)
+            .setSmallIcon(R.drawable.ic_more_settings)
             .setAutoCancel(true)
             .setColor(applicationContext.getCompatColor(R.color.colorPrimary))
             .setStyle(BigTextStyle().bigText("${SyncWorker::class.java.simpleName} result: $result"))
@@ -78,4 +78,3 @@ class SyncWorker @AssistedInject constructor(
         fun create(appContext: Context, workerParameters: WorkerParameters): ListenableWorker
     }
 }
-
diff --git a/app/src/main/java/io/github/wulkanowy/services/sync/channels/DebugChannel.kt b/app/src/main/java/io/github/wulkanowy/services/sync/channels/DebugChannel.kt
index 02fff5690..166d3efc4 100644
--- a/app/src/main/java/io/github/wulkanowy/services/sync/channels/DebugChannel.kt
+++ b/app/src/main/java/io/github/wulkanowy/services/sync/channels/DebugChannel.kt
@@ -3,15 +3,15 @@ package io.github.wulkanowy.services.sync.channels
 import android.annotation.TargetApi
 import android.app.Notification.VISIBILITY_PUBLIC
 import android.app.NotificationChannel
-import android.app.NotificationManager
 import android.app.NotificationManager.IMPORTANCE_DEFAULT
 import android.content.Context
+import androidx.core.app.NotificationManagerCompat
 import io.github.wulkanowy.R
 import javax.inject.Inject
 
 @TargetApi(26)
 class DebugChannel @Inject constructor(
-    private val notificationManager: NotificationManager,
+    private val notificationManager: NotificationManagerCompat,
     private val context: Context
 ) {
 
@@ -21,8 +21,9 @@ class DebugChannel @Inject constructor(
 
     fun create() {
         notificationManager.createNotificationChannel(
-            NotificationChannel(CHANNEL_ID, context.getString(R.string.channel_debug), IMPORTANCE_DEFAULT).apply {
-                lockscreenVisibility = VISIBILITY_PUBLIC
-            })
+            NotificationChannel(CHANNEL_ID, context.getString(R.string.channel_debug), IMPORTANCE_DEFAULT)
+                .apply {
+                    lockscreenVisibility = VISIBILITY_PUBLIC
+                })
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/services/sync/channels/NewEntriesChannel.kt b/app/src/main/java/io/github/wulkanowy/services/sync/channels/NewEntriesChannel.kt
index 8e24a2a67..71624510b 100644
--- a/app/src/main/java/io/github/wulkanowy/services/sync/channels/NewEntriesChannel.kt
+++ b/app/src/main/java/io/github/wulkanowy/services/sync/channels/NewEntriesChannel.kt
@@ -3,15 +3,15 @@ package io.github.wulkanowy.services.sync.channels
 import android.annotation.TargetApi
 import android.app.Notification.VISIBILITY_PUBLIC
 import android.app.NotificationChannel
-import android.app.NotificationManager
 import android.app.NotificationManager.IMPORTANCE_HIGH
 import android.content.Context
+import androidx.core.app.NotificationManagerCompat
 import io.github.wulkanowy.R
 import javax.inject.Inject
 
 @TargetApi(26)
 class NewEntriesChannel @Inject constructor(
-    private val notificationManager: NotificationManager,
+    private val notificationManager: NotificationManagerCompat,
     private val context: Context
 ) {
 
@@ -21,10 +21,11 @@ class NewEntriesChannel @Inject constructor(
 
     fun create() {
         notificationManager.createNotificationChannel(
-            NotificationChannel(CHANNEL_ID, context.getString(R.string.channel_new_entries), IMPORTANCE_HIGH).apply {
-                enableLights(true)
-                enableVibration(true)
-                lockscreenVisibility = VISIBILITY_PUBLIC
-            })
+            NotificationChannel(CHANNEL_ID, context.getString(R.string.channel_new_entries), IMPORTANCE_HIGH)
+                .apply {
+                    enableLights(true)
+                    enableVibration(true)
+                    lockscreenVisibility = VISIBILITY_PUBLIC
+                })
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/services/sync/works/GradeWork.kt b/app/src/main/java/io/github/wulkanowy/services/sync/works/GradeWork.kt
index 66316934a..cd863568b 100644
--- a/app/src/main/java/io/github/wulkanowy/services/sync/works/GradeWork.kt
+++ b/app/src/main/java/io/github/wulkanowy/services/sync/works/GradeWork.kt
@@ -15,7 +15,7 @@ import io.github.wulkanowy.data.repositories.grade.GradeRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.services.sync.channels.NewEntriesChannel
 import io.github.wulkanowy.ui.modules.main.MainActivity
-import io.github.wulkanowy.ui.modules.main.MainActivity.Companion.EXTRA_START_MENU_INDEX
+import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.utils.getCompatColor
 import io.reactivex.Completable
 import javax.inject.Inject
@@ -41,14 +41,14 @@ class GradeWork @Inject constructor(
         notificationManager.notify(Random.nextInt(Int.MAX_VALUE), NotificationCompat.Builder(context, NewEntriesChannel.CHANNEL_ID)
             .setContentTitle(context.resources.getQuantityString(R.plurals.grade_new_items, grades.size, grades.size))
             .setContentText(context.resources.getQuantityString(R.plurals.grade_notify_new_items, grades.size, grades.size))
-            .setSmallIcon(R.drawable.ic_stat_notify_grade)
+            .setSmallIcon(R.drawable.ic_stat_grade)
             .setAutoCancel(true)
             .setPriority(PRIORITY_HIGH)
             .setDefaults(DEFAULT_ALL)
             .setColor(context.getCompatColor(R.color.colorPrimary))
             .setContentIntent(
-                PendingIntent.getActivity(context, 0,
-                    MainActivity.getStartIntent(context).putExtra(EXTRA_START_MENU_INDEX, 0), FLAG_UPDATE_CURRENT))
+                PendingIntent.getActivity(context, MainView.Section.GRADE.id,
+                    MainActivity.getStartIntent(context, MainView.Section.GRADE, true), FLAG_UPDATE_CURRENT))
             .setStyle(NotificationCompat.InboxStyle().run {
                 setSummaryText(context.resources.getQuantityString(R.plurals.grade_number_item, grades.size, grades.size))
                 grades.forEach { addLine("${it.subject}: ${it.entry}") }
diff --git a/app/src/main/java/io/github/wulkanowy/services/sync/works/LuckyNumberWork.kt b/app/src/main/java/io/github/wulkanowy/services/sync/works/LuckyNumberWork.kt
index ca7aaac60..1e366d58c 100644
--- a/app/src/main/java/io/github/wulkanowy/services/sync/works/LuckyNumberWork.kt
+++ b/app/src/main/java/io/github/wulkanowy/services/sync/works/LuckyNumberWork.kt
@@ -15,7 +15,7 @@ import io.github.wulkanowy.data.repositories.luckynumber.LuckyNumberRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.services.sync.channels.NewEntriesChannel
 import io.github.wulkanowy.ui.modules.main.MainActivity
-import io.github.wulkanowy.ui.modules.main.MainActivity.Companion.EXTRA_START_MENU_INDEX
+import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.utils.getCompatColor
 import io.reactivex.Completable
 import javax.inject.Inject
@@ -41,15 +41,14 @@ class LuckyNumberWork @Inject constructor(
         notificationManager.notify(Random.nextInt(Int.MAX_VALUE), NotificationCompat.Builder(context, NewEntriesChannel.CHANNEL_ID)
             .setContentTitle(context.getString(R.string.lucky_number_notify_new_item_title))
             .setContentText(context.getString(R.string.lucky_number_notify_new_item, luckyNumber.luckyNumber))
-            .setSmallIcon(R.drawable.ic_stat_notify_lucky_number)
+            .setSmallIcon(R.drawable.ic_stat_luckynumber)
             .setAutoCancel(true)
             .setDefaults(DEFAULT_ALL)
             .setPriority(PRIORITY_HIGH)
             .setColor(context.getCompatColor(R.color.colorPrimary))
             .setContentIntent(
-                PendingIntent.getActivity(context, 0,
-                    MainActivity.getStartIntent(context).putExtra(EXTRA_START_MENU_INDEX, 4), FLAG_UPDATE_CURRENT)
-            )
+                PendingIntent.getActivity(context, MainView.Section.MESSAGE.id,
+                    MainActivity.getStartIntent(context, MainView.Section.LUCKY_NUMBER, true), FLAG_UPDATE_CURRENT))
             .build())
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/services/sync/works/MessageWork.kt b/app/src/main/java/io/github/wulkanowy/services/sync/works/MessageWork.kt
index 7ab2c8d4b..d0890626f 100644
--- a/app/src/main/java/io/github/wulkanowy/services/sync/works/MessageWork.kt
+++ b/app/src/main/java/io/github/wulkanowy/services/sync/works/MessageWork.kt
@@ -16,7 +16,7 @@ import io.github.wulkanowy.data.repositories.message.MessageRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.services.sync.channels.NewEntriesChannel
 import io.github.wulkanowy.ui.modules.main.MainActivity
-import io.github.wulkanowy.ui.modules.main.MainActivity.Companion.EXTRA_START_MENU_INDEX
+import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.utils.getCompatColor
 import io.reactivex.Completable
 import javax.inject.Inject
@@ -30,7 +30,7 @@ class MessageWork @Inject constructor(
 ) : Work {
 
     override fun create(student: Student, semester: Semester): Completable {
-        return messageRepository.getMessages(student, RECEIVED, true, preferencesRepository.isNotificationsEnable)
+        return messageRepository.getMessages(student, semester, RECEIVED, true, preferencesRepository.isNotificationsEnable)
             .flatMap { messageRepository.getNotNotifiedMessages(student) }
             .flatMapCompletable {
                 if (it.isNotEmpty()) notify(it)
@@ -42,14 +42,14 @@ class MessageWork @Inject constructor(
         notificationManager.notify(Random.nextInt(Int.MAX_VALUE), NotificationCompat.Builder(context, NewEntriesChannel.CHANNEL_ID)
             .setContentTitle(context.resources.getQuantityString(R.plurals.message_new_items, messages.size, messages.size))
             .setContentText(context.resources.getQuantityString(R.plurals.message_notify_new_items, messages.size, messages.size))
-            .setSmallIcon(R.drawable.ic_stat_notify_message)
+            .setSmallIcon(R.drawable.ic_stat_message)
             .setAutoCancel(true)
             .setDefaults(DEFAULT_ALL)
             .setPriority(PRIORITY_HIGH)
             .setColor(context.getCompatColor(R.color.colorPrimary))
             .setContentIntent(
-                PendingIntent.getActivity(context, 0,
-                    MainActivity.getStartIntent(context).putExtra(EXTRA_START_MENU_INDEX, 4), FLAG_UPDATE_CURRENT)
+                PendingIntent.getActivity(context, MainView.Section.MESSAGE.id,
+                    MainActivity.getStartIntent(context, MainView.Section.MESSAGE, true), FLAG_UPDATE_CURRENT)
             )
             .setStyle(NotificationCompat.InboxStyle().run {
                 setSummaryText(context.resources.getQuantityString(R.plurals.message_number_item, messages.size, messages.size))
diff --git a/app/src/main/java/io/github/wulkanowy/services/sync/works/NoteWork.kt b/app/src/main/java/io/github/wulkanowy/services/sync/works/NoteWork.kt
index d0e8fe21c..235ef201e 100644
--- a/app/src/main/java/io/github/wulkanowy/services/sync/works/NoteWork.kt
+++ b/app/src/main/java/io/github/wulkanowy/services/sync/works/NoteWork.kt
@@ -15,7 +15,7 @@ import io.github.wulkanowy.data.repositories.note.NoteRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.services.sync.channels.NewEntriesChannel
 import io.github.wulkanowy.ui.modules.main.MainActivity
-import io.github.wulkanowy.ui.modules.main.MainActivity.Companion.EXTRA_START_MENU_INDEX
+import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.utils.getCompatColor
 import io.reactivex.Completable
 import javax.inject.Inject
@@ -41,15 +41,14 @@ class NoteWork @Inject constructor(
         notificationManager.notify(Random.nextInt(Int.MAX_VALUE), NotificationCompat.Builder(context, NewEntriesChannel.CHANNEL_ID)
             .setContentTitle(context.resources.getQuantityString(R.plurals.note_new_items, notes.size, notes.size))
             .setContentText(context.resources.getQuantityString(R.plurals.note_notify_new_items, notes.size, notes.size))
-            .setSmallIcon(R.drawable.ic_stat_notify_note)
+            .setSmallIcon(R.drawable.ic_stat_note)
             .setAutoCancel(true)
             .setDefaults(DEFAULT_ALL)
             .setPriority(PRIORITY_HIGH)
             .setColor(context.getCompatColor(R.color.colorPrimary))
             .setContentIntent(
-                PendingIntent.getActivity(context, 0,
-                    MainActivity.getStartIntent(context).putExtra(EXTRA_START_MENU_INDEX, 4), FLAG_UPDATE_CURRENT)
-            )
+                PendingIntent.getActivity(context, MainView.Section.NOTE.id,
+                    MainActivity.getStartIntent(context, MainView.Section.NOTE, true), FLAG_UPDATE_CURRENT))
             .setStyle(NotificationCompat.InboxStyle().run {
                 setSummaryText(context.resources.getQuantityString(R.plurals.note_number_item, notes.size, notes.size))
                 notes.forEach { addLine("${it.teacher}: ${it.category}") }
diff --git a/app/src/main/java/io/github/wulkanowy/services/sync/works/TeacherWork.kt b/app/src/main/java/io/github/wulkanowy/services/sync/works/TeacherWork.kt
new file mode 100644
index 000000000..18178d2d1
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/services/sync/works/TeacherWork.kt
@@ -0,0 +1,14 @@
+package io.github.wulkanowy.services.sync.works
+
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.data.repositories.teacher.TeacherRepository
+import io.reactivex.Completable
+import javax.inject.Inject
+
+class TeacherWork @Inject constructor(private val teacherRepository: TeacherRepository) : Work {
+
+    override fun create(student: Student, semester: Semester): Completable {
+        return teacherRepository.getTeachers(semester, true).ignoreElement()
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/services/widgets/TimetableWidgetService.kt b/app/src/main/java/io/github/wulkanowy/services/widgets/TimetableWidgetService.kt
index 0432ee146..7c7e67101 100644
--- a/app/src/main/java/io/github/wulkanowy/services/widgets/TimetableWidgetService.kt
+++ b/app/src/main/java/io/github/wulkanowy/services/widgets/TimetableWidgetService.kt
@@ -3,11 +3,11 @@ package io.github.wulkanowy.services.widgets
 import android.content.Intent
 import android.widget.RemoteViewsService
 import dagger.android.AndroidInjection
-import io.github.wulkanowy.data.db.SharedPrefHelper
+import io.github.wulkanowy.data.db.SharedPrefProvider
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.data.repositories.timetable.TimetableRepository
-import io.github.wulkanowy.ui.widgets.timetable.TimetableWidgetFactory
+import io.github.wulkanowy.ui.modules.timetablewidget.TimetableWidgetFactory
 import io.github.wulkanowy.utils.SchedulersProvider
 import javax.inject.Inject
 
@@ -23,7 +23,7 @@ class TimetableWidgetService : RemoteViewsService() {
     lateinit var semesterRepo: SemesterRepository
 
     @Inject
-    lateinit var sharedPref: SharedPrefHelper
+    lateinit var sharedPref: SharedPrefProvider
 
     @Inject
     lateinit var schedulers: SchedulersProvider
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/BaseActivity.kt b/app/src/main/java/io/github/wulkanowy/ui/base/BaseActivity.kt
index f227dc19a..ee74832fd 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/base/BaseActivity.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/BaseActivity.kt
@@ -1,34 +1,92 @@
 package io.github.wulkanowy.ui.base
 
+import android.app.ActivityManager
+import android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK
+import android.content.Intent.FLAG_ACTIVITY_NEW_TASK
+import android.os.Build.VERSION.SDK_INT
+import android.os.Build.VERSION_CODES.LOLLIPOP
 import android.os.Bundle
 import android.view.View
+import android.widget.Toast
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.app.AppCompatDelegate
 import com.google.android.material.snackbar.Snackbar
 import com.google.android.material.snackbar.Snackbar.LENGTH_LONG
-import dagger.android.support.DaggerAppCompatActivity
+import dagger.android.AndroidInjection
+import dagger.android.DispatchingAndroidInjector
+import dagger.android.HasAndroidInjector
 import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.modules.login.LoginActivity
+import io.github.wulkanowy.utils.FragmentLifecycleLogger
+import io.github.wulkanowy.utils.getThemeAttrColor
+import javax.inject.Inject
 
-abstract class BaseActivity : DaggerAppCompatActivity(), BaseView {
+abstract class BaseActivity<T : BasePresenter<out BaseView>> : AppCompatActivity(), BaseView,
+    HasAndroidInjector {
 
-    protected lateinit var messageContainer: View
+    @Inject
+    lateinit var androidInjector: DispatchingAndroidInjector<Any>
+
+    @Inject
+    lateinit var fragmentLifecycleLogger: FragmentLifecycleLogger
+
+    @Inject
+    lateinit var themeManager: ThemeManager
+
+    protected var messageContainer: View? = null
+
+    abstract var presenter: T
 
     public override fun onCreate(savedInstanceState: Bundle?) {
+        AndroidInjection.inject(this)
+        themeManager.applyActivityTheme(this)
         super.onCreate(savedInstanceState)
+        supportFragmentManager.registerFragmentLifecycleCallbacks(fragmentLifecycleLogger, true)
         AppCompatDelegate.setCompatVectorFromResourcesEnabled(true)
+
+        if (SDK_INT >= LOLLIPOP) {
+            @Suppress("DEPRECATION")
+            setTaskDescription(ActivityManager.TaskDescription(null, null, getThemeAttrColor(R.attr.colorSurface)))
+        }
     }
 
     override fun showError(text: String, error: Throwable) {
-        Snackbar.make(messageContainer, text, LENGTH_LONG).setAction(R.string.all_details) {
-            ErrorDialog.newInstance(error).show(supportFragmentManager, error.toString())
-        }.show()
+        if (messageContainer != null) {
+            Snackbar.make(messageContainer!!, text, LENGTH_LONG)
+                .setAction(R.string.all_details) { showErrorDetailsDialog(error) }
+                .show()
+        } else showMessage(text)
+    }
+
+    override fun showErrorDetailsDialog(error: Throwable) {
+        ErrorDialog.newInstance(error).show(supportFragmentManager, error.toString())
     }
 
     override fun showMessage(text: String) {
-        Snackbar.make(messageContainer, text, LENGTH_LONG).show()
+        if (messageContainer != null) Snackbar.make(messageContainer!!, text, LENGTH_LONG).show()
+        else Toast.makeText(this, text, Toast.LENGTH_LONG).show()
+    }
+
+    override fun showExpiredDialog() {
+        AlertDialog.Builder(this)
+            .setTitle(R.string.main_session_expired)
+            .setMessage(R.string.main_session_relogin)
+            .setPositiveButton(R.string.main_log_in) { _, _ -> presenter.onExpiredLoginSelected() }
+            .setNegativeButton(android.R.string.cancel) { _, _ -> }
+            .show()
+    }
+
+    override fun openClearLoginView() {
+        startActivity(LoginActivity.getStartIntent(this)
+            .apply { addFlags(FLAG_ACTIVITY_CLEAR_TASK or FLAG_ACTIVITY_NEW_TASK) })
     }
 
     override fun onDestroy() {
         super.onDestroy()
         invalidateOptionsMenu()
+        presenter.onDetachView()
     }
+
+    override fun androidInjector() = androidInjector
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/BaseDialogFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/base/BaseDialogFragment.kt
new file mode 100644
index 000000000..fdc463714
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/BaseDialogFragment.kt
@@ -0,0 +1,27 @@
+package io.github.wulkanowy.ui.base
+
+import android.widget.Toast
+import dagger.android.support.DaggerAppCompatDialogFragment
+
+abstract class BaseDialogFragment : DaggerAppCompatDialogFragment(), BaseView {
+
+    override fun showError(text: String, error: Throwable) {
+        showMessage(text)
+    }
+
+    override fun showMessage(text: String) {
+        Toast.makeText(context, text, Toast.LENGTH_LONG).show()
+    }
+
+    override fun showExpiredDialog() {
+        (activity as? BaseActivity<*>)?.showExpiredDialog()
+    }
+
+    override fun openClearLoginView() {
+        (activity as? BaseActivity<*>)?.openClearLoginView()
+    }
+
+    override fun showErrorDetailsDialog(error: Throwable) {
+        ErrorDialog.newInstance(error).show(childFragmentManager, error.toString())
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/BaseFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/base/BaseFragment.kt
index 6e863c511..2f5878d0d 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/base/BaseFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/BaseFragment.kt
@@ -2,6 +2,7 @@ package io.github.wulkanowy.ui.base
 
 import android.view.View
 import com.google.android.material.snackbar.Snackbar
+import com.google.android.material.snackbar.Snackbar.LENGTH_LONG
 import dagger.android.support.DaggerFragment
 import io.github.wulkanowy.R
 
@@ -10,16 +11,32 @@ abstract class BaseFragment : DaggerFragment(), BaseView {
     protected var messageContainer: View? = null
 
     override fun showError(text: String, error: Throwable) {
-        if (messageContainer == null) (activity as? BaseActivity)?.showError(text, error)
-        else messageContainer?.also {
-            Snackbar.make(it, text, Snackbar.LENGTH_LONG).setAction(R.string.all_details) {
-                ErrorDialog.newInstance(error).show(childFragmentManager, error.toString())
-            }.show()
+        if (messageContainer != null) {
+            Snackbar.make(messageContainer!!, text, LENGTH_LONG)
+                .setAction(R.string.all_details) { if (isAdded) showErrorDetailsDialog(error) }
+                .show()
+        } else {
+            (activity as? BaseActivity<*>)?.showError(text, error)
         }
     }
 
+    override fun showErrorDetailsDialog(error: Throwable) {
+        ErrorDialog.newInstance(error).show(childFragmentManager, error.toString())
+    }
+
     override fun showMessage(text: String) {
-        if (messageContainer == null) (activity as? BaseActivity)?.showMessage(text)
-        else messageContainer?.also { Snackbar.make(it, text, Snackbar.LENGTH_LONG).show() }
+        if (messageContainer != null) {
+            Snackbar.make(messageContainer!!, text, LENGTH_LONG).show()
+        } else {
+            (activity as? BaseActivity<*>)?.showMessage(text)
+        }
+    }
+
+    override fun showExpiredDialog() {
+        (activity as? BaseActivity<*>)?.showExpiredDialog()
+    }
+
+    override fun openClearLoginView() {
+        (activity as? BaseActivity<*>)?.openClearLoginView()
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/BaseFragmentPagerAdapter.kt b/app/src/main/java/io/github/wulkanowy/ui/base/BaseFragmentPagerAdapter.kt
index fcf7e9809..5f8bf4178 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/base/BaseFragmentPagerAdapter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/BaseFragmentPagerAdapter.kt
@@ -4,14 +4,15 @@ import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.FragmentPagerAdapter
 
-class BaseFragmentPagerAdapter(private val fragmentManager: FragmentManager) : FragmentPagerAdapter(fragmentManager) {
+class BaseFragmentPagerAdapter(private val fragmentManager: FragmentManager) :
+    FragmentPagerAdapter(fragmentManager, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT) {
 
     private val pages = mutableMapOf<Fragment, String?>()
 
     var containerId = 0
 
     fun getFragmentInstance(position: Int): Fragment? {
-        if (containerId == 0) throw IllegalArgumentException("Container id is 0")
+        require(containerId != 0) { "Container id is 0" }
         return fragmentManager.findFragmentByTag("android:switcher:$containerId:$position")
     }
 
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/BasePresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/base/BasePresenter.kt
index c5a31958d..9f0b4047c 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/base/BasePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/BasePresenter.kt
@@ -1,8 +1,16 @@
 package io.github.wulkanowy.ui.base
 
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.utils.SchedulersProvider
+import io.reactivex.Completable
 import io.reactivex.disposables.CompositeDisposable
+import timber.log.Timber
 
-open class BasePresenter<T : BaseView>(private val errorHandler: ErrorHandler) {
+open class BasePresenter<T : BaseView>(
+    protected val errorHandler: ErrorHandler,
+    protected val studentRepository: StudentRepository,
+    protected val schedulers: SchedulersProvider
+) {
 
     val disposable = CompositeDisposable()
 
@@ -10,7 +18,33 @@ open class BasePresenter<T : BaseView>(private val errorHandler: ErrorHandler) {
 
     open fun onAttachView(view: T) {
         this.view = view
-        errorHandler.showErrorMessage = { text, error -> view.showError(text, error) }
+        errorHandler.apply {
+            showErrorMessage = view::showError
+            onSessionExpired = view::showExpiredDialog
+            onNoCurrentStudent = view::openClearLoginView
+        }
+    }
+
+    fun onExpiredLoginSelected() {
+        Timber.i("Attempt to switch the student after the session expires")
+        disposable.add(studentRepository.getCurrentStudent(false)
+            .flatMapCompletable { studentRepository.logoutStudent(it) }
+            .andThen(studentRepository.getSavedStudents(false))
+            .flatMapCompletable {
+                if (it.isNotEmpty()) {
+                    Timber.i("Switching current student")
+                    studentRepository.switchStudent(it[0])
+                } else Completable.complete()
+            }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .subscribe({
+                Timber.i("Switch student result: Open login view")
+                view?.openClearLoginView()
+            }, {
+                Timber.i("Switch student result: An exception occurred")
+                errorHandler.dispatch(it)
+            }))
     }
 
     open fun onDetachView() {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/BaseView.kt b/app/src/main/java/io/github/wulkanowy/ui/base/BaseView.kt
index d2470fd17..0f4df92cd 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/base/BaseView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/BaseView.kt
@@ -5,4 +5,10 @@ interface BaseView {
     fun showError(text: String, error: Throwable)
 
     fun showMessage(text: String)
+
+    fun showExpiredDialog()
+
+    fun openClearLoginView()
+
+    fun showErrorDetailsDialog(error: Throwable)
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/ErrorDialog.kt b/app/src/main/java/io/github/wulkanowy/ui/base/ErrorDialog.kt
index db3918b90..3255ea683 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/base/ErrorDialog.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/ErrorDialog.kt
@@ -2,13 +2,13 @@ package io.github.wulkanowy.ui.base
 
 import android.content.ClipData
 import android.content.ClipboardManager
-import android.content.Context.CLIPBOARD_SERVICE
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.Toast
 import android.widget.Toast.LENGTH_LONG
+import androidx.core.content.getSystemService
 import androidx.fragment.app.DialogFragment
 import io.github.wulkanowy.R
 import kotlinx.android.synthetic.main.dialog_error.*
@@ -43,16 +43,17 @@ class ErrorDialog : DialogFragment() {
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
-        StringWriter().let { writer ->
-            error.printStackTrace(PrintWriter(writer))
 
-            errorDialogContent.text = writer.toString()
-            errorDialogCopy.setOnClickListener {
-                ClipData.newPlainText("wulkanowyError", writer.toString()).let { clip ->
-                    (activity?.getSystemService(CLIPBOARD_SERVICE) as? ClipboardManager)?.primaryClip = clip
-                }
-                Toast.makeText(context, R.string.all_copied, LENGTH_LONG).show()
-            }
+        val stringWriter = StringWriter().apply {
+            error.printStackTrace(PrintWriter(this))
+        }
+
+        errorDialogContent.text = stringWriter.toString()
+        errorDialogCopy.setOnClickListener {
+            val clip = ClipData.newPlainText("wulkanowy", stringWriter.toString())
+            activity?.getSystemService<ClipboardManager>()?.setPrimaryClip(clip)
+
+            Toast.makeText(context, R.string.all_copied, LENGTH_LONG).show()
         }
         errorDialogCancel.setOnClickListener { dismiss() }
     }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/ErrorHandler.kt b/app/src/main/java/io/github/wulkanowy/ui/base/ErrorHandler.kt
index 83cbf0ef0..ba10af6bf 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/base/ErrorHandler.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/ErrorHandler.kt
@@ -3,9 +3,13 @@ package io.github.wulkanowy.ui.base
 import android.content.res.Resources
 import com.readystatesoftware.chuck.api.ChuckCollector
 import io.github.wulkanowy.R
-import io.github.wulkanowy.api.interceptor.FeatureDisabledException
-import io.github.wulkanowy.api.interceptor.ServiceUnavailableException
-import io.github.wulkanowy.api.login.NotLoggedInException
+import io.github.wulkanowy.data.exceptions.NoCurrentStudentException
+import io.github.wulkanowy.sdk.exception.BadCredentialsException
+import io.github.wulkanowy.sdk.exception.FeatureDisabledException
+import io.github.wulkanowy.sdk.exception.FeatureNotAvailableException
+import io.github.wulkanowy.sdk.exception.NotLoggedInException
+import io.github.wulkanowy.sdk.exception.ServiceUnavailableException
+import io.github.wulkanowy.utils.security.ScramblerException
 import timber.log.Timber
 import java.net.SocketTimeoutException
 import java.net.UnknownHostException
@@ -15,6 +19,10 @@ open class ErrorHandler @Inject constructor(protected val resources: Resources,
 
     var showErrorMessage: (String, Throwable) -> Unit = { _, _ -> }
 
+    var onSessionExpired: () -> Unit = {}
+
+    var onNoCurrentStudent: () -> Unit = {}
+
     fun dispatch(error: Throwable) {
         chuckCollector.onError(error.javaClass.simpleName, error)
         Timber.e(error, "An exception occurred while the Wulkanowy was running")
@@ -22,17 +30,24 @@ open class ErrorHandler @Inject constructor(protected val resources: Resources,
     }
 
     protected open fun proceed(error: Throwable) {
-        showErrorMessage((when (error) {
-            is UnknownHostException -> resources.getString(R.string.error_no_internet)
-            is SocketTimeoutException -> resources.getString(R.string.error_timeout)
-            is NotLoggedInException -> resources.getString(R.string.error_login_failed)
-            is ServiceUnavailableException -> resources.getString(R.string.error_service_unavailable)
-            is FeatureDisabledException -> resources.getString(R.string.error_feature_disabled)
-            else -> resources.getString(R.string.error_unknown)
-        }), error)
+        resources.run {
+            when (error) {
+                is UnknownHostException -> showErrorMessage(getString(R.string.error_no_internet), error)
+                is SocketTimeoutException -> showErrorMessage(getString(R.string.error_timeout), error)
+                is NotLoggedInException -> showErrorMessage(getString(R.string.error_login_failed), error)
+                is ServiceUnavailableException -> showErrorMessage(getString(R.string.error_service_unavailable), error)
+                is FeatureDisabledException -> showErrorMessage(getString(R.string.error_feature_disabled), error)
+                is ScramblerException, is BadCredentialsException -> onSessionExpired()
+                is NoCurrentStudentException -> onNoCurrentStudent()
+                is FeatureNotAvailableException -> showErrorMessage(getString(R.string.error_feature_not_available), error)
+                else -> showErrorMessage(getString(R.string.error_unknown), error)
+            }
+        }
     }
 
     open fun clear() {
         showErrorMessage = { _, _ -> }
+        onSessionExpired = {}
+        onNoCurrentStudent = {}
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/ThemeManager.kt b/app/src/main/java/io/github/wulkanowy/ui/base/ThemeManager.kt
new file mode 100644
index 000000000..501348612
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/ThemeManager.kt
@@ -0,0 +1,40 @@
+package io.github.wulkanowy.ui.base
+
+import android.content.pm.PackageManager.GET_ACTIVITIES
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM
+import androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO
+import androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class ThemeManager @Inject constructor(private val preferencesRepository: PreferencesRepository) {
+
+    fun applyActivityTheme(activity: AppCompatActivity) {
+        if (isThemeApplicable(activity)) {
+            applyDefaultTheme()
+            if (preferencesRepository.appTheme == "black") activity.setTheme(R.style.WulkanowyTheme_Black)
+        }
+    }
+
+    fun applyDefaultTheme() {
+        AppCompatDelegate.setDefaultNightMode(
+            when (val theme = preferencesRepository.appTheme) {
+                "light" -> MODE_NIGHT_NO
+                "dark", "black" -> MODE_NIGHT_YES
+                "system" -> MODE_NIGHT_FOLLOW_SYSTEM
+                else -> throw IllegalArgumentException("Wrong theme: $theme")
+            }
+        )
+    }
+
+    private fun isThemeApplicable(activity: AppCompatActivity): Boolean {
+        return activity.packageManager.getPackageInfo(activity.packageName, GET_ACTIVITIES)
+            .activities.singleOrNull { it.name == activity::class.java.canonicalName }?.theme
+            .let { it == R.style.WulkanowyTheme_Black || it == R.style.WulkanowyTheme_NoActionBar }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionFragment.kt
deleted file mode 100644
index 110729d4f..000000000
--- a/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionFragment.kt
+++ /dev/null
@@ -1,21 +0,0 @@
-package io.github.wulkanowy.ui.base.session
-
-import android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK
-import android.content.Intent.FLAG_ACTIVITY_NEW_TASK
-import io.github.wulkanowy.ui.base.BaseFragment
-import io.github.wulkanowy.ui.modules.login.LoginActivity
-import io.github.wulkanowy.ui.modules.main.MainActivity
-
-open class BaseSessionFragment : BaseFragment(), BaseSessionView {
-
-    override fun showExpiredDialog() {
-        (activity as? MainActivity)?.showExpiredDialog()
-    }
-
-    override fun openLoginView() {
-        activity?.also {
-            startActivity(LoginActivity.getStartIntent(it)
-                .apply { addFlags(FLAG_ACTIVITY_CLEAR_TASK or FLAG_ACTIVITY_NEW_TASK) })
-        }
-    }
-}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionPresenter.kt
deleted file mode 100644
index 2c9f50ea9..000000000
--- a/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionPresenter.kt
+++ /dev/null
@@ -1,15 +0,0 @@
-package io.github.wulkanowy.ui.base.session
-
-import io.github.wulkanowy.ui.base.BasePresenter
-
-open class BaseSessionPresenter<T : BaseSessionView>(private val errorHandler: SessionErrorHandler) :
-    BasePresenter<T>(errorHandler) {
-
-    override fun onAttachView(view: T) {
-        super.onAttachView(view)
-        errorHandler.apply {
-            onDecryptionFail = { view.showExpiredDialog() }
-            onNoCurrentStudent = { view.openLoginView() }
-        }
-    }
-}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionView.kt b/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionView.kt
deleted file mode 100644
index 619c2863a..000000000
--- a/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionView.kt
+++ /dev/null
@@ -1,10 +0,0 @@
-package io.github.wulkanowy.ui.base.session
-
-import io.github.wulkanowy.ui.base.BaseView
-
-interface BaseSessionView : BaseView {
-
-    fun showExpiredDialog()
-
-    fun openLoginView()
-}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/base/session/SessionErrorHandler.kt b/app/src/main/java/io/github/wulkanowy/ui/base/session/SessionErrorHandler.kt
deleted file mode 100644
index 017eabbab..000000000
--- a/app/src/main/java/io/github/wulkanowy/ui/base/session/SessionErrorHandler.kt
+++ /dev/null
@@ -1,32 +0,0 @@
-package io.github.wulkanowy.ui.base.session
-
-import android.content.res.Resources
-import com.readystatesoftware.chuck.api.ChuckCollector
-import io.github.wulkanowy.data.exceptions.NoCurrentStudentException
-import io.github.wulkanowy.ui.base.ErrorHandler
-import io.github.wulkanowy.utils.security.ScramblerException
-import javax.inject.Inject
-
-open class SessionErrorHandler @Inject constructor(
-    resources: Resources,
-    chuckCollector: ChuckCollector
-) : ErrorHandler(resources, chuckCollector) {
-
-    var onDecryptionFail: () -> Unit = {}
-
-    var onNoCurrentStudent: () -> Unit = {}
-
-    override fun proceed(error: Throwable) {
-        when (error) {
-            is ScramblerException -> onDecryptionFail()
-            is NoCurrentStudentException -> onNoCurrentStudent()
-            else -> super.proceed(error)
-        }
-    }
-
-    override fun clear() {
-        super.clear()
-        onDecryptionFail = {}
-        onNoCurrentStudent = {}
-    }
-}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutFragment.kt
index 52caf731e..22276bdf9 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutFragment.kt
@@ -1,18 +1,29 @@
 package io.github.wulkanowy.ui.modules.about
 
 import android.content.Intent
+import android.content.Intent.ACTION_SENDTO
+import android.content.Intent.EXTRA_EMAIL
+import android.content.Intent.EXTRA_SUBJECT
+import android.content.Intent.EXTRA_TEXT
+import android.graphics.drawable.Drawable
 import android.net.Uri
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import com.mikepenz.aboutlibraries.LibsBuilder
-import com.mikepenz.aboutlibraries.LibsFragmentCompat
-import io.github.wulkanowy.BuildConfig
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.ui.base.BaseFragment
+import io.github.wulkanowy.ui.modules.about.license.LicenseFragment
+import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
-import io.github.wulkanowy.utils.withOnExtraListener
+import io.github.wulkanowy.utils.AppInfo
+import io.github.wulkanowy.utils.getCompatDrawable
+import io.github.wulkanowy.utils.openInternetBrowser
+import io.github.wulkanowy.utils.setOnItemClickListener
+import kotlinx.android.synthetic.main.fragment_about.*
 import javax.inject.Inject
 
 class AboutFragment : BaseFragment(), AboutView, MainView.TitledView {
@@ -21,72 +32,122 @@ class AboutFragment : BaseFragment(), AboutView, MainView.TitledView {
     lateinit var presenter: AboutPresenter
 
     @Inject
-    lateinit var fragmentCompat: LibsFragmentCompat
+    lateinit var aboutAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+
+    @Inject
+    lateinit var appInfo: AppInfo
+
+    override val versionRes: Triple<String, String, Drawable?>?
+        get() = context?.run {
+            Triple(getString(R.string.about_version), "${appInfo.versionName} (${appInfo.versionCode})", getCompatDrawable(R.drawable.ic_all_about))
+        }
+
+    override val feedbackRes: Triple<String, String, Drawable?>?
+        get() = context?.run {
+            Triple(getString(R.string.about_feedback), getString(R.string.about_feedback_summary), getCompatDrawable(R.drawable.ic_about_feedback))
+        }
+
+    override val faqRes: Triple<String, String, Drawable?>?
+        get() = context?.run {
+            Triple(getString(R.string.about_faq), getString(R.string.about_faq_summary), getCompatDrawable(R.drawable.ic_about_faq))
+        }
+
+    override val discordRes: Triple<String, String, Drawable?>?
+        get() = context?.run {
+            Triple(getString(R.string.about_discord), getString(R.string.about_discord_summary), getCompatDrawable(R.drawable.ic_about_discord))
+        }
+
+    override val homepageRes: Triple<String, String, Drawable?>?
+        get() = context?.run {
+            Triple(getString(R.string.about_homepage), getString(R.string.about_homepage_summary), getCompatDrawable(R.drawable.ic_about_homepage))
+        }
+
+    override val licensesRes: Triple<String, String, Drawable?>?
+        get() = context?.run {
+            Triple(getString(R.string.about_licenses), getString(R.string.about_licenses_summary), getCompatDrawable(R.drawable.ic_about_licenses))
+        }
+
+    override val privacyRes: Triple<String, String, Drawable?>?
+        get() = context?.run {
+            Triple(getString(R.string.about_privacy), getString(R.string.about_privacy_summary), getCompatDrawable(R.drawable.ic_about_privacy))
+        }
+
+    override val titleStringId get() = R.string.about_title
 
     companion object {
         fun newInstance() = AboutFragment()
     }
 
-    override val titleStringId: Int
-        get() = R.string.about_title
-
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
-        presenter.onAttachView(this)
-        return Bundle().apply {
-            putSerializable("data", LibsBuilder()
-                .withAboutAppName(getString(R.string.app_name))
-                .withAboutVersionShown(true)
-                .withAboutIconShown(true)
-                .withLicenseShown(true)
-                .withAboutSpecial1(getString(R.string.about_discord_invite))
-                .withAboutSpecial2(getString(R.string.about_homepage))
-                .withAboutSpecial3(getString(R.string.about_feedback))
-                .withFields(R.string::class.java.fields)
-                .withCheckCachedDetection(false)
-                .withExcludedLibraries("fastadapter", "AndroidIconics", "Jsoup", "Retrofit", "okio",
-                    "OkHttp", "Butterknife", "CircleImageView")
-                .withOnExtraListener { presenter.onExtraSelect(it) })
-        }.let {
-            fragmentCompat.onCreateView(inflater.context, inflater, container, savedInstanceState, it)
-        }
+        return inflater.inflate(R.layout.fragment_about, container, false)
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        fragmentCompat.onViewCreated(view, savedInstanceState)
+        presenter.onAttachView(this)
     }
 
-    override fun openDiscordInviteView() {
-        startActivity(Intent.parseUri("https://discord.gg/vccAQBr", 0))
-    }
+    override fun initView() {
+        aboutAdapter.setOnItemClickListener(presenter::onItemSelected)
 
-    override fun openHomepageWebView() {
-        startActivity(Intent.parseUri("https://wulkanowy.github.io/", 0))
-    }
-
-    override fun openEmailClientView() {
-        val intent = Intent(Intent.ACTION_SENDTO).apply {
-            data = Uri.parse("mailto:")
-            putExtra(Intent.EXTRA_EMAIL, Array(1) { "wulkanowyinc@gmail.com" })
-            putExtra(Intent.EXTRA_SUBJECT, "Zgłoszenie błędu")
-            putExtra(Intent.EXTRA_TEXT, "Tu umieść treść zgłoszenia\n\n" + "-".repeat(40) + "\n" + """
-                Build: ${BuildConfig.VERSION_CODE}
-                SDK: ${android.os.Build.VERSION.SDK_INT}
-                Device: ${android.os.Build.MANUFACTURER} ${android.os.Build.MODEL}
-            """.trimIndent())
+        with(aboutRecycler) {
+            layoutManager = SmoothScrollLinearLayoutManager(context)
+            adapter = aboutAdapter
         }
+    }
+
+    override fun updateData(header: AboutScrollableHeader, items: List<AboutItem>) {
+        with(aboutAdapter) {
+            removeAllScrollableHeaders()
+            addScrollableHeader(header)
+            updateDataSet(items)
+        }
+    }
+
+    override fun openDiscordInvite() {
+        context?.openInternetBrowser("https://discord.gg/vccAQBr", ::showMessage)
+    }
+
+    override fun openHomepage() {
+        context?.openInternetBrowser("https://wulkanowy.github.io/", ::showMessage)
+    }
+
+    override fun openEmailClient() {
+        val intent = Intent(ACTION_SENDTO)
+            .apply {
+                data = Uri.parse("mailto:")
+                putExtra(EXTRA_EMAIL, arrayOf("wulkanowyinc@gmail.com"))
+                putExtra(EXTRA_SUBJECT, "Zgłoszenie błędu")
+                putExtra(EXTRA_TEXT, "Tu umieść treść zgłoszenia\n\n${"-".repeat(40)}\n " +
+                    """
+                        Build: ${appInfo.versionCode}
+                        SDK: ${appInfo.systemVersion}
+                        Device: ${appInfo.systemManufacturer} ${appInfo.systemModel}
+                    """.trimIndent())
+            }
 
         context?.let {
             if (intent.resolveActivity(it.packageManager) != null) {
                 startActivity(Intent.createChooser(intent, getString(R.string.about_feedback)))
             } else {
-                startActivity(Intent.parseUri("https://github.com/wulkanowy/wulkanowy/issues", 0))
+                it.openInternetBrowser("https://github.com/wulkanowy/wulkanowy/issues", ::showMessage)
             }
         }
     }
 
+    override fun openFaqPage() {
+        context?.openInternetBrowser("https://wulkanowy.github.io/czesto-zadawane-pytania", ::showMessage)
+    }
+
+    override fun openLicenses() {
+        (activity as? MainActivity)?.pushView(LicenseFragment.newInstance())
+    }
+
+    override fun openPrivacyPolicy() {
+        context?.openInternetBrowser("https://wulkanowy.github.io/polityka-prywatnosci.html", ::showMessage)
+    }
+
     override fun onDestroyView() {
-        fragmentCompat.onDestroyView()
         presenter.onDetachView()
         super.onDestroyView()
     }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutItem.kt
new file mode 100644
index 000000000..29f1cd8c8
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutItem.kt
@@ -0,0 +1,56 @@
+package io.github.wulkanowy.ui.modules.about
+
+import android.graphics.drawable.Drawable
+import android.view.View
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import eu.davidea.flexibleadapter.items.IFlexible
+import eu.davidea.viewholders.FlexibleViewHolder
+import io.github.wulkanowy.R
+import kotlinx.android.extensions.LayoutContainer
+import kotlinx.android.synthetic.main.item_about.*
+
+class AboutItem(
+    val title: String,
+    private val summary: String,
+    private val image: Drawable?
+) : AbstractFlexibleItem<AboutItem.ViewHolder>() {
+
+    override fun getLayoutRes() = R.layout.item_about
+
+    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) = ViewHolder(view, adapter)
+
+    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>) {
+        with(holder) {
+            aboutItemImage.setImageDrawable(image)
+            aboutItemTitle.text = title
+            aboutItemSummary.text = summary
+        }
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as AboutItem
+
+        if (title != other.title) return false
+        if (summary != other.summary) return false
+        if (image != other.image) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = title.hashCode()
+        result = 31 * result + summary.hashCode()
+        result = 31 * result + (image?.hashCode() ?: 0)
+        return result
+    }
+
+    class ViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) : FlexibleViewHolder(view, adapter),
+        LayoutContainer {
+
+        override val containerView: View? get() = contentView
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutModule.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutModule.kt
deleted file mode 100644
index cc5ba7cf3..000000000
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutModule.kt
+++ /dev/null
@@ -1,14 +0,0 @@
-package io.github.wulkanowy.ui.modules.about
-
-import com.mikepenz.aboutlibraries.LibsFragmentCompat
-import dagger.Module
-import dagger.Provides
-import io.github.wulkanowy.di.scopes.PerFragment
-
-@Module
-class AboutModule {
-
-    @PerFragment
-    @Provides
-    fun provideLibsFragmentCompat() = LibsFragmentCompat()
-}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutPresenter.kt
index 116dbef35..8087c9556 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutPresenter.kt
@@ -1,44 +1,76 @@
 package io.github.wulkanowy.ui.modules.about
 
-import com.mikepenz.aboutlibraries.Libs
-import com.mikepenz.aboutlibraries.Libs.SpecialButton.SPECIAL1
-import com.mikepenz.aboutlibraries.Libs.SpecialButton.SPECIAL2
-import com.mikepenz.aboutlibraries.Libs.SpecialButton.SPECIAL3
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
 import timber.log.Timber
 import javax.inject.Inject
 
 class AboutPresenter @Inject constructor(
+    schedulers: SchedulersProvider,
     errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val analytics: FirebaseAnalyticsHelper
-) : BasePresenter<AboutView>(errorHandler) {
+) : BasePresenter<AboutView>(errorHandler, studentRepository, schedulers) {
 
     override fun onAttachView(view: AboutView) {
         super.onAttachView(view)
-        Timber.i("About view is attached")
+        view.initView()
+        Timber.i("About view was initialized")
+        loadData()
     }
 
-    fun onExtraSelect(type: Libs.SpecialButton?) {
+    fun onItemSelected(item: AbstractFlexibleItem<*>) {
+        if (item !is AboutItem) return
         view?.run {
-            when (type) {
-                SPECIAL1 -> {
-                    Timber.i("Opening discord invide page")
-                    analytics.logEvent("open_page", "name" to "discord")
-                    openDiscordInviteView()
-                }
-                SPECIAL2 -> {
-                    Timber.i("Opening home page")
-                    analytics.logEvent("open_page", "name" to "home")
-                    openHomepageWebView()
-                }
-                SPECIAL3 -> {
+            when (item.title) {
+                feedbackRes?.first -> {
                     Timber.i("Opening email client")
-                    analytics.logEvent("open_page", "name" to "email")
-                    openEmailClientView()
+                    openEmailClient()
+                    analytics.logEvent("about_open", "name" to "feedback")
+                }
+                faqRes?.first -> {
+                    Timber.i("Opening faq page")
+                    openFaqPage()
+                    analytics.logEvent("about_open", "name" to "faq")
+                }
+                discordRes?.first -> {
+                    Timber.i("Opening discord")
+                    openDiscordInvite()
+                    analytics.logEvent("about_open", "name" to "discord")
+                }
+                homepageRes?.first -> {
+                    Timber.i("Opening homepage")
+                    openHomepage()
+                    analytics.logEvent("about_open", "name" to "homepage")
+                }
+                licensesRes?.first -> {
+                    Timber.i("Opening licenses view")
+                    openLicenses()
+                    analytics.logEvent("about_open", "name" to "licenses")
+                }
+                privacyRes?.first -> {
+                    Timber.i("Opening privacy page ")
+                    openPrivacyPolicy()
+                    analytics.logEvent("about_open", "name" to "privacy")
                 }
             }
         }
     }
+
+    private fun loadData() {
+        view?.run {
+            updateData(AboutScrollableHeader(), listOfNotNull(
+                versionRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
+                feedbackRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
+                faqRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
+                discordRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
+                homepageRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
+                licensesRes?.let { (title, summary, image) -> AboutItem(title, summary, image) },
+                privacyRes?.let { (title, summary, image) -> AboutItem(title, summary, image) }))
+        }
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutScrollableHeader.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutScrollableHeader.kt
new file mode 100644
index 000000000..07bb41249
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutScrollableHeader.kt
@@ -0,0 +1,41 @@
+package io.github.wulkanowy.ui.modules.about
+
+import android.view.View
+import androidx.core.content.res.ResourcesCompat
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import eu.davidea.flexibleadapter.items.IFlexible
+import eu.davidea.viewholders.FlexibleViewHolder
+import io.github.wulkanowy.R
+import kotlinx.android.extensions.LayoutContainer
+import kotlinx.android.synthetic.main.scrollable_header_about.*
+
+class AboutScrollableHeader : AbstractFlexibleItem<AboutScrollableHeader.ViewHolder>() {
+
+    override fun getLayoutRes() = R.layout.scrollable_header_about
+
+    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) = ViewHolder(view, adapter)
+
+    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>) {
+        with(holder) {
+            val context = contentView.context
+            val drawable = ResourcesCompat.getDrawableForDensity(context.resources, context.applicationInfo.icon, 640, null)
+
+            aboutScrollableHeaderIcon.setImageDrawable(drawable)
+        }
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+        return true
+    }
+
+    override fun hashCode() = javaClass.hashCode()
+
+    class ViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) : FlexibleViewHolder(view, adapter),
+        LayoutContainer {
+
+        override val containerView: View? get() = contentView
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutView.kt
index 5b206ad82..34850bae4 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutView.kt
@@ -1,12 +1,37 @@
 package io.github.wulkanowy.ui.modules.about
 
+import android.graphics.drawable.Drawable
 import io.github.wulkanowy.ui.base.BaseView
 
 interface AboutView : BaseView {
 
-    fun openDiscordInviteView()
+    val versionRes: Triple<String, String, Drawable?>?
 
-    fun openEmailClientView()
+    val feedbackRes: Triple<String, String, Drawable?>?
 
-    fun openHomepageWebView()
+    val faqRes: Triple<String, String, Drawable?>?
+
+    val discordRes: Triple<String, String, Drawable?>?
+
+    val homepageRes: Triple<String, String, Drawable?>?
+
+    val licensesRes: Triple<String, String, Drawable?>?
+
+    val privacyRes: Triple<String, String, Drawable?>?
+
+    fun initView()
+
+    fun updateData(header: AboutScrollableHeader, items: List<AboutItem>)
+
+    fun openDiscordInvite()
+
+    fun openEmailClient()
+
+    fun openFaqPage()
+
+    fun openHomepage()
+
+    fun openLicenses()
+
+    fun openPrivacyPolicy()
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseFragment.kt
new file mode 100644
index 000000000..2681680b1
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseFragment.kt
@@ -0,0 +1,86 @@
+package io.github.wulkanowy.ui.modules.about.license
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.view.ViewGroup
+import androidx.appcompat.app.AlertDialog
+import androidx.core.text.parseAsHtml
+import com.mikepenz.aboutlibraries.Libs
+import com.mikepenz.aboutlibraries.entity.Library
+import dagger.Lazy
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.base.BaseFragment
+import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.utils.setOnItemClickListener
+import kotlinx.android.synthetic.main.fragment_license.*
+import javax.inject.Inject
+
+class LicenseFragment : BaseFragment(), LicenseView, MainView.TitledView {
+
+    @Inject
+    lateinit var presenter: LicensePresenter
+
+    @Inject
+    lateinit var licenseAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+
+    @Inject
+    lateinit var libs: Lazy<Libs>
+
+    override val titleStringId get() = R.string.license_title
+
+    override val appLibraries: ArrayList<Library>?
+        get() = context?.let {
+            libs.get().prepareLibraries(it, emptyArray(), emptyArray(), autoDetect = true, checkCachedDetection = true, sort = true)
+        }
+
+    companion object {
+        fun newInstance() = LicenseFragment()
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.fragment_license, container, false)
+    }
+
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        presenter.onAttachView(this)
+    }
+
+    override fun initView() {
+        with(licenseRecycler) {
+            layoutManager = SmoothScrollLinearLayoutManager(context)
+            adapter = licenseAdapter
+        }
+        licenseAdapter.setOnItemClickListener(presenter::onItemSelected)
+    }
+
+    override fun updateData(data: List<LicenseItem>) {
+        licenseAdapter.updateDataSet(data)
+    }
+
+    override fun openLicense(licenseHtml: String) {
+        context?.let {
+            AlertDialog.Builder(it).apply {
+                setTitle(R.string.license_dialog_title)
+                setMessage(licenseHtml.parseAsHtml())
+                setPositiveButton(android.R.string.ok) { _, _ -> }
+                show()
+            }
+        }
+    }
+
+    override fun showProgress(show: Boolean) {
+        licenseProgress.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun onDestroyView() {
+        presenter.onDetachView()
+        super.onDestroyView()
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseItem.kt
new file mode 100644
index 000000000..98c86e75a
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseItem.kt
@@ -0,0 +1,44 @@
+package io.github.wulkanowy.ui.modules.about.license
+
+import android.view.View
+import com.mikepenz.aboutlibraries.entity.Library
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import eu.davidea.flexibleadapter.items.IFlexible
+import eu.davidea.viewholders.FlexibleViewHolder
+import io.github.wulkanowy.R
+import kotlinx.android.extensions.LayoutContainer
+import kotlinx.android.synthetic.main.item_license.*
+
+class LicenseItem(val library: Library) : AbstractFlexibleItem<LicenseItem.ViewHolder>() {
+
+    override fun getLayoutRes() = R.layout.item_license
+
+    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) = ViewHolder(view, adapter)
+
+    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>) {
+        with(holder) {
+            licenseItemName.text = library.libraryName
+            licenseItemSummary.text = library.license?.licenseName
+        }
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as LicenseItem
+
+        if (library != other.library) return false
+
+        return true
+    }
+
+    override fun hashCode() = library.hashCode()
+
+    class ViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) : FlexibleViewHolder(view, adapter),
+        LayoutContainer {
+
+        override val containerView: View? get() = contentView
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseModule.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseModule.kt
new file mode 100644
index 000000000..0ffc3d90e
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseModule.kt
@@ -0,0 +1,15 @@
+package io.github.wulkanowy.ui.modules.about.license
+
+import android.content.Context
+import com.mikepenz.aboutlibraries.Libs
+import dagger.Module
+import dagger.Provides
+import io.github.wulkanowy.di.scopes.PerFragment
+
+@Module
+class LicenseModule {
+
+    @PerFragment
+    @Provides
+    fun provideLibs(context: Context) = Libs(context)
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicensePresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicensePresenter.kt
new file mode 100644
index 000000000..b5b8fcd13
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicensePresenter.kt
@@ -0,0 +1,40 @@
+package io.github.wulkanowy.ui.modules.about.license
+
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.SchedulersProvider
+import io.reactivex.Single
+import javax.inject.Inject
+
+class LicensePresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository
+) : BasePresenter<LicenseView>(errorHandler, studentRepository, schedulers) {
+
+    override fun onAttachView(view: LicenseView) {
+        super.onAttachView(view)
+        view.initView()
+        loadData()
+    }
+
+    fun onItemSelected(item: AbstractFlexibleItem<*>) {
+        if (item !is LicenseItem) return
+        view?.run { item.library.license?.licenseDescription?.let { openLicense(it) } }
+    }
+
+    private fun loadData() {
+        disposable.add(Single.fromCallable { view?.appLibraries }
+            .map {
+                val exclude = listOf("Android-Iconics", "CircleImageView", "FastAdapter", "Jsoup", "okio", "Retrofit")
+                it.filter { library -> !exclude.contains(library.libraryName) }
+            }
+            .map { it.map { library -> LicenseItem(library) } }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doOnEvent { _, _ -> view?.showProgress(false) }
+            .subscribe({ view?.run { updateData(it) } }, { errorHandler.dispatch(it) }))
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseView.kt
new file mode 100644
index 000000000..3939d3e80
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/about/license/LicenseView.kt
@@ -0,0 +1,17 @@
+package io.github.wulkanowy.ui.modules.about.license
+
+import com.mikepenz.aboutlibraries.entity.Library
+import io.github.wulkanowy.ui.base.BaseView
+
+interface LicenseView : BaseView {
+
+    val appLibraries: ArrayList<Library>?
+
+    fun initView()
+
+    fun updateData(data: List<LicenseItem>)
+
+    fun openLicense(licenseHtml: String)
+
+    fun showProgress(show: Boolean)
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountDialog.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountDialog.kt
index 32458f276..cfff31c98 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountDialog.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountDialog.kt
@@ -1,7 +1,5 @@
 package io.github.wulkanowy.ui.modules.account
 
-import android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK
-import android.content.Intent.FLAG_ACTIVITY_NEW_TASK
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -9,18 +7,17 @@ import android.view.ViewGroup
 import android.widget.Toast
 import android.widget.Toast.LENGTH_LONG
 import androidx.appcompat.app.AlertDialog
-import dagger.android.support.DaggerAppCompatDialogFragment
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.base.BaseDialogFragment
 import io.github.wulkanowy.ui.modules.login.LoginActivity
-import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.dialog_account.*
 import javax.inject.Inject
 
-class AccountDialog : DaggerAppCompatDialogFragment(), AccountView {
+class AccountDialog : BaseDialogFragment(), AccountView {
 
     @Inject
     lateinit var presenter: AccountPresenter
@@ -74,18 +71,11 @@ class AccountDialog : DaggerAppCompatDialogFragment(), AccountView {
     }
 
     override fun openLoginView() {
-        activity?.also {
+        activity?.let {
             startActivity(LoginActivity.getStartIntent(it))
         }
     }
 
-    override fun openClearLoginView() {
-        activity?.also {
-            startActivity(LoginActivity.getStartIntent(it)
-                .apply { addFlags(FLAG_ACTIVITY_CLEAR_TASK or FLAG_ACTIVITY_NEW_TASK) })
-        }
-    }
-
     override fun showConfirmDialog() {
         context?.let {
             AlertDialog.Builder(it)
@@ -97,11 +87,8 @@ class AccountDialog : DaggerAppCompatDialogFragment(), AccountView {
         }
     }
 
-    override fun recreateView() {
-        activity?.also {
-            startActivity(MainActivity.getStartIntent(it))
-            it.finish()
-        }
+    override fun recreateMainView() {
+        activity?.recreate()
     }
 
     override fun onDestroy() {
@@ -109,4 +96,3 @@ class AccountDialog : DaggerAppCompatDialogFragment(), AccountView {
         super.onDestroy()
     }
 }
-
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountItem.kt
index 972d10a26..d3a3ee6a3 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountItem.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountItem.kt
@@ -1,13 +1,16 @@
 package io.github.wulkanowy.ui.modules.account
 
 import android.annotation.SuppressLint
+import android.graphics.PorterDuff
 import android.view.View
+import androidx.core.graphics.ColorUtils
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import eu.davidea.flexibleadapter.items.IFlexible
 import eu.davidea.viewholders.FlexibleViewHolder
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.utils.getThemeAttrColor
 import kotlinx.android.extensions.LayoutContainer
 import kotlinx.android.synthetic.main.item_account.*
 
@@ -15,16 +18,19 @@ class AccountItem(val student: Student) : AbstractFlexibleItem<AccountItem.ViewH
 
     override fun getLayoutRes() = R.layout.item_account
 
-    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>): ViewHolder {
-        return ViewHolder(view, adapter)
-    }
+    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) = ViewHolder(view, adapter)
 
     @SuppressLint("SetTextI18n")
     override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
-        holder.apply {
+        val context = holder.contentView.context
+
+        val colorImage = if (student.isCurrent) context.getThemeAttrColor(R.attr.colorPrimary)
+        else ColorUtils.setAlphaComponent(context.getThemeAttrColor(R.attr.colorOnSurface), 153)
+
+        with(holder) {
             accountItemName.text = "${student.studentName} ${student.className}"
             accountItemSchool.text = student.schoolName
-            accountItemImage.setBackgroundResource(if (student.isCurrent) R.drawable.ic_account_circular_border else 0)
+            accountItemImage.setColorFilter(colorImage, PorterDuff.Mode.SRC_IN)
         }
     }
 
@@ -45,8 +51,9 @@ class AccountItem(val student: Student) : AbstractFlexibleItem<AccountItem.ViewH
         return result
     }
 
-    class ViewHolder(view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter), LayoutContainer {
-        override val containerView: View
-            get() = contentView
+    class ViewHolder(view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter),
+        LayoutContainer {
+
+        override val containerView: View? get() = contentView
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountPresenter.kt
index 0fc6cc45c..e9b4b81ee 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountPresenter.kt
@@ -11,16 +11,16 @@ import timber.log.Timber
 import javax.inject.Inject
 
 class AccountPresenter @Inject constructor(
-    private val errorHandler: ErrorHandler,
-    private val studentRepository: StudentRepository,
-    private val syncManager: SyncManager,
-    private val schedulers: SchedulersProvider
-) : BasePresenter<AccountView>(errorHandler) {
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
+    private val syncManager: SyncManager
+) : BasePresenter<AccountView>(errorHandler, studentRepository, schedulers) {
 
     override fun onAttachView(view: AccountView) {
         super.onAttachView(view)
-        Timber.i("Account dialog is attached")
         view.initView()
+        Timber.i("Account dialog view was initialized")
         loadData()
     }
 
@@ -54,7 +54,7 @@ class AccountPresenter @Inject constructor(
                         openClearLoginView()
                     } else {
                         Timber.i("Logout result: Switch to another student")
-                        recreateView()
+                        recreateMainView()
                     }
                 }
             }, {
@@ -73,9 +73,10 @@ class AccountPresenter @Inject constructor(
                 disposable.add(studentRepository.switchStudent(item.student)
                     .subscribeOn(schedulers.backgroundThread)
                     .observeOn(schedulers.mainThread)
+                    .doFinally { view?.dismissView() }
                     .subscribe({
                         Timber.i("Change a student result: Success")
-                        view?.recreateView()
+                        view?.recreateMainView()
                     }, {
                         Timber.i("Change a student result: An exception occurred")
                         errorHandler.dispatch(it)
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountView.kt
index ca74998a1..ede5023ba 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountView.kt
@@ -14,8 +14,6 @@ interface AccountView : BaseView {
 
     fun openLoginView()
 
-    fun openClearLoginView()
-
-    fun recreateView()
+    fun recreateMainView()
 }
 
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceFragment.kt
index f0cab7f11..bc7c1cacd 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceFragment.kt
@@ -6,22 +6,30 @@ import android.view.Menu
 import android.view.MenuInflater
 import android.view.MenuItem
 import android.view.View
+import android.view.View.GONE
+import android.view.View.INVISIBLE
+import android.view.View.VISIBLE
 import android.view.ViewGroup
+import com.wdullaer.materialdatetimepicker.date.DatePickerDialog
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.FlexibleItemDecoration
 import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Attendance
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.attendance.summary.AttendanceSummaryFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.utils.SchooldaysRangeLimiter
+import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_attendance.*
+import org.threeten.bp.LocalDate
 import javax.inject.Inject
 
-class AttendanceFragment : BaseSessionFragment(), AttendanceView, MainView.MainChildView, MainView.TitledView {
+class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildView,
+    MainView.TitledView {
 
     @Inject
     lateinit var presenter: AttendancePresenter
@@ -35,14 +43,11 @@ class AttendanceFragment : BaseSessionFragment(), AttendanceView, MainView.MainC
         fun newInstance() = AttendanceFragment()
     }
 
-    override val titleStringId: Int
-        get() = R.string.attendance_title
+    override val titleStringId get() = R.string.attendance_title
 
-    override val isViewEmpty: Boolean
-        get() = attendanceAdapter.isEmpty
+    override val isViewEmpty get() = attendanceAdapter.isEmpty
 
-    override val currentStackSize: Int?
-        get() = (activity as? MainActivity)?.currentStackSize
+    override val currentStackSize get() = (activity as? MainActivity)?.currentStackSize
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -60,29 +65,33 @@ class AttendanceFragment : BaseSessionFragment(), AttendanceView, MainView.MainC
     }
 
     override fun initView() {
-        attendanceAdapter.apply {
-            setOnItemClickListener { presenter.onAttendanceItemSelected(it) }
-        }
+        attendanceAdapter.setOnItemClickListener(presenter::onAttendanceItemSelected)
 
-        attendanceRecycler.run {
+        with(attendanceRecycler) {
             layoutManager = SmoothScrollLinearLayoutManager(context)
             adapter = attendanceAdapter
             addItemDecoration(FlexibleItemDecoration(context)
                 .withDefaultDivider()
-                .withDrawDividerOnLastItem(false)
-            )
+                .withDrawDividerOnLastItem(false))
         }
-        attendanceSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+
+        attendanceSwipe.setOnRefreshListener(presenter::onSwipeRefresh)
+        attendanceErrorRetry.setOnClickListener { presenter.onRetry() }
+        attendanceErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+
         attendancePreviousButton.setOnClickListener { presenter.onPreviousDay() }
+        attendanceNavDate.setOnClickListener { presenter.onPickDate() }
         attendanceNextButton.setOnClickListener { presenter.onNextDay() }
+
+        attendanceNavContainer.setElevationCompat(requireContext().dpToPx(8f))
     }
 
-    override fun onCreateOptionsMenu(menu: Menu?, inflater: MenuInflater?) {
-        inflater?.inflate(R.menu.action_menu_attendance, menu)
+    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
+        inflater.inflate(R.menu.action_menu_attendance, menu)
     }
 
-    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
-        return if (item?.itemId == R.id.attendanceMenuSummary) presenter.onSummarySwitchSelected()
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return if (item.itemId == R.id.attendanceMenuSummary) presenter.onSummarySwitchSelected()
         else false
     }
 
@@ -103,7 +112,7 @@ class AttendanceFragment : BaseSessionFragment(), AttendanceView, MainView.MainC
     }
 
     override fun onFragmentReselected() {
-        presenter.onViewReselected()
+        if (::presenter.isInitialized) presenter.onViewReselected()
     }
 
     override fun popView() {
@@ -111,11 +120,19 @@ class AttendanceFragment : BaseSessionFragment(), AttendanceView, MainView.MainC
     }
 
     override fun showEmpty(show: Boolean) {
-        attendanceEmpty.visibility = if (show) View.VISIBLE else View.GONE
+        attendanceEmpty.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun showErrorView(show: Boolean) {
+        attendanceError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        attendanceErrorMessage.text = message
     }
 
     override fun showProgress(show: Boolean) {
-        attendanceProgress.visibility = if (show) View.VISIBLE else View.GONE
+        attendanceProgress.visibility = if (show) VISIBLE else GONE
     }
 
     override fun enableSwipe(enable: Boolean) {
@@ -123,7 +140,7 @@ class AttendanceFragment : BaseSessionFragment(), AttendanceView, MainView.MainC
     }
 
     override fun showContent(show: Boolean) {
-        attendanceRecycler.visibility = if (show) View.VISIBLE else View.GONE
+        attendanceRecycler.visibility = if (show) VISIBLE else GONE
     }
 
     override fun hideRefresh() {
@@ -131,17 +148,32 @@ class AttendanceFragment : BaseSessionFragment(), AttendanceView, MainView.MainC
     }
 
     override fun showPreButton(show: Boolean) {
-        attendancePreviousButton.visibility = if (show) View.VISIBLE else View.INVISIBLE
+        attendancePreviousButton.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showNextButton(show: Boolean) {
-        attendanceNextButton.visibility = if (show) View.VISIBLE else View.INVISIBLE
+        attendanceNextButton.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showAttendanceDialog(lesson: Attendance) {
         (activity as? MainActivity)?.showDialogFragment(AttendanceDialog.newInstance(lesson))
     }
 
+    override fun showDatePickerDialog(currentDate: LocalDate) {
+        val dateSetListener = DatePickerDialog.OnDateSetListener { _, year, month, dayOfMonth ->
+            presenter.onDateSet(year, month + 1, dayOfMonth)
+        }
+        val datePickerDialog = DatePickerDialog.newInstance(dateSetListener,
+            currentDate.year, currentDate.monthValue - 1, currentDate.dayOfMonth)
+
+        with(datePickerDialog) {
+            setDateRangeLimiter(SchooldaysRangeLimiter())
+            version = DatePickerDialog.Version.VERSION_2
+            scrollOrientation = DatePickerDialog.ScrollOrientation.VERTICAL
+            show(this@AttendanceFragment.parentFragmentManager, null)
+        }
+    }
+
     override fun openSummaryView() {
         (activity as? MainActivity)?.pushView(AttendanceSummaryFragment.newInstance())
     }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendancePresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendancePresenter.kt
index ec471c16a..1490ee6e3 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendancePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendancePresenter.kt
@@ -1,15 +1,16 @@
 package io.github.wulkanowy.ui.modules.attendance
 
-import com.google.firebase.analytics.FirebaseAnalytics.Param.START_DATE
+import android.annotation.SuppressLint
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.repositories.attendance.AttendanceRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
+import io.github.wulkanowy.utils.getLastSchoolDayIfHoliday
 import io.github.wulkanowy.utils.isHolidays
 import io.github.wulkanowy.utils.nextSchoolDay
 import io.github.wulkanowy.utils.previousOrSameSchoolDay
@@ -23,23 +24,29 @@ import java.util.concurrent.TimeUnit.MILLISECONDS
 import javax.inject.Inject
 
 class AttendancePresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val attendanceRepository: AttendanceRepository,
-    private val studentRepository: StudentRepository,
     private val semesterRepository: SemesterRepository,
     private val prefRepository: PreferencesRepository,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<AttendanceView>(errorHandler) {
+) : BasePresenter<AttendanceView>(errorHandler, studentRepository, schedulers) {
+
+    private var baseDate: LocalDate = now().previousOrSameSchoolDay
 
     lateinit var currentDate: LocalDate
         private set
 
+    private lateinit var lastError: Throwable
+
     fun onAttachView(view: AttendanceView, date: Long?) {
         super.onAttachView(view)
-        Timber.i("Attendance view is attached")
         view.initView()
-        loadData(ofEpochDay(date ?: now().previousOrSameSchoolDay.toEpochDay()))
+        Timber.i("Attendance view was initialized")
+        errorHandler.showErrorMessage = ::showErrorViewOnError
+        loadData(ofEpochDay(date ?: baseDate.toEpochDay()))
+        if (currentDate.isHolidays) setBaseDateOnHolidays()
         reloadView()
     }
 
@@ -53,16 +60,37 @@ class AttendancePresenter @Inject constructor(
         reloadView()
     }
 
+    fun onPickDate() {
+        view?.showDatePickerDialog(currentDate)
+    }
+
+    fun onDateSet(year: Int, month: Int, day: Int) {
+        loadData(LocalDate.of(year, month, day))
+        reloadView()
+    }
+
     fun onSwipeRefresh() {
         Timber.i("Force refreshing the attendance")
         loadData(currentDate, true)
     }
 
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(currentDate, true)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
     fun onViewReselected() {
         Timber.i("Attendance view is reselected")
         view?.also { view ->
             if (view.currentStackSize == 1) {
-                now().previousOrSameSchoolDay.also {
+                baseDate.also {
                     if (currentDate != it) {
                         loadData(it)
                         reloadView()
@@ -84,6 +112,20 @@ class AttendancePresenter @Inject constructor(
         return true
     }
 
+    private fun setBaseDateOnHolidays() {
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .subscribe({
+                baseDate = baseDate.getLastSchoolDayIfHoliday(it.schoolYear)
+                currentDate = baseDate
+                reloadNavigation()
+            }) {
+                Timber.i("Loading semester result: An exception occurred")
+            })
+    }
+
     private fun loadData(date: LocalDate, forceRefresh: Boolean = false) {
         Timber.i("Loading attendance data started")
         currentDate = date
@@ -113,18 +155,29 @@ class AttendancePresenter @Inject constructor(
                     view?.apply {
                         updateData(it)
                         showEmpty(it.isEmpty())
+                        showErrorView(false)
                         showContent(it.isNotEmpty())
                     }
-                    analytics.logEvent("load_attendance", "items" to it.size, "force_refresh" to forceRefresh, START_DATE to currentDate.toFormattedString("yyyy-MM-dd"))
+                    analytics.logEvent("load_attendance", "items" to it.size, "force_refresh" to forceRefresh)
                 }) {
                     Timber.i("Loading attendance result: An exception occurred")
-                    view?.run { showEmpty(isViewEmpty) }
                     errorHandler.dispatch(it)
                 }
             )
         }
     }
 
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
+
     private fun reloadView() {
         Timber.i("Reload attendance view with the date ${currentDate.toFormattedString()}")
         view?.apply {
@@ -132,10 +185,18 @@ class AttendancePresenter @Inject constructor(
             enableSwipe(false)
             showContent(false)
             showEmpty(false)
+            showErrorView(false)
             clearData()
-            showNextButton(!currentDate.plusDays(1).isHolidays)
+            reloadNavigation()
+        }
+    }
+
+    @SuppressLint("DefaultLocale")
+    private fun reloadNavigation() {
+        view?.apply {
             showPreButton(!currentDate.minusDays(1).isHolidays)
-            updateNavigationDay(currentDate.toFormattedString("EEEE\ndd.MM.YYYY").capitalize())
+            showNextButton(!currentDate.plusDays(1).isHolidays)
+            updateNavigationDay(currentDate.toFormattedString("EEEE, dd.MM").capitalize())
         }
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceView.kt
index ef3b874b6..a6d0d4ba9 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceView.kt
@@ -1,9 +1,10 @@
 package io.github.wulkanowy.ui.modules.attendance
 
 import io.github.wulkanowy.data.db.entities.Attendance
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
+import org.threeten.bp.LocalDate
 
-interface AttendanceView : BaseSessionView {
+interface AttendanceView : BaseView {
 
     val isViewEmpty: Boolean
 
@@ -23,6 +24,10 @@ interface AttendanceView : BaseSessionView {
 
     fun showEmpty(show: Boolean)
 
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
     fun showProgress(show: Boolean)
 
     fun enableSwipe(enable: Boolean)
@@ -35,6 +40,8 @@ interface AttendanceView : BaseSessionView {
 
     fun showAttendanceDialog(lesson: Attendance)
 
+    fun showDatePickerDialog(currentDate: LocalDate)
+
     fun openSummaryView()
 
     fun popView()
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryFragment.kt
index b8d2c9528..fc3601847 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryFragment.kt
@@ -13,13 +13,14 @@ import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.setOnItemSelectedListener
 import kotlinx.android.synthetic.main.fragment_attendance_summary.*
 import javax.inject.Inject
 
-class AttendanceSummaryFragment : BaseSessionFragment(), AttendanceSummaryView, MainView.TitledView {
+class AttendanceSummaryFragment : BaseFragment(), AttendanceSummaryView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: AttendanceSummaryPresenter
@@ -35,11 +36,9 @@ class AttendanceSummaryFragment : BaseSessionFragment(), AttendanceSummaryView,
         fun newInstance() = AttendanceSummaryFragment()
     }
 
-    override val titleStringId: Int
-        get() = R.string.attendance_title
+    override val titleStringId get() = R.string.attendance_title
 
-    override val isViewEmpty
-        get() = attendanceSummaryAdapter.isEmpty
+    override val isViewEmpty get() = attendanceSummaryAdapter.isEmpty
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.fragment_attendance_summary, container, false)
@@ -52,25 +51,28 @@ class AttendanceSummaryFragment : BaseSessionFragment(), AttendanceSummaryView,
     }
 
     override fun initView() {
-        attendanceSummaryRecycler.run {
+        with(attendanceSummaryRecycler) {
             layoutManager = SmoothScrollLinearLayoutManager(context)
             adapter = attendanceSummaryAdapter
         }
-        attendanceSummarySwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
 
-        context?.let {
-            subjectsAdapter = ArrayAdapter(it, android.R.layout.simple_spinner_item, ArrayList<String>())
-            subjectsAdapter.setDropDownViewResource(R.layout.item_attendance_summary_subject)
-        }
+        attendanceSummarySwipe.setOnRefreshListener(presenter::onSwipeRefresh)
+        attendanceSummaryErrorRetry.setOnClickListener { presenter.onRetry() }
+        attendanceSummaryErrorDetails.setOnClickListener { presenter.onDetailsClick() }
 
-        attendanceSummarySubjects.run {
+        subjectsAdapter = ArrayAdapter(requireContext(), android.R.layout.simple_spinner_item, mutableListOf())
+        subjectsAdapter.setDropDownViewResource(R.layout.item_attendance_summary_subject)
+
+        with(attendanceSummarySubjects) {
             adapter = subjectsAdapter
-            setOnItemSelectedListener { presenter.onSubjectSelected((it as TextView).text.toString()) }
+            setOnItemSelectedListener<TextView> { presenter.onSubjectSelected(it?.text?.toString()) }
         }
+
+        attendanceSummarySubjectsContainer.setElevationCompat(requireContext().dpToPx(1f))
     }
 
     override fun updateSubjects(data: ArrayList<String>) {
-        subjectsAdapter.run {
+        with(subjectsAdapter) {
             clear()
             addAll(data)
             notifyDataSetChanged()
@@ -78,7 +80,7 @@ class AttendanceSummaryFragment : BaseSessionFragment(), AttendanceSummaryView,
     }
 
     override fun updateDataSet(data: List<AttendanceSummaryItem>, header: AttendanceSummaryScrollableHeader) {
-        attendanceSummaryAdapter.apply {
+        with(attendanceSummaryAdapter) {
             updateDataSet(data, true)
             removeAllScrollableHeaders()
             addScrollableHeader(header)
@@ -93,6 +95,14 @@ class AttendanceSummaryFragment : BaseSessionFragment(), AttendanceSummaryView,
         attendanceSummaryEmpty.visibility = if (show) VISIBLE else GONE
     }
 
+    override fun showErrorView(show: Boolean) {
+        attendanceSummaryError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        attendanceSummaryErrorMessage.text = message
+    }
+
     override fun showProgress(show: Boolean) {
         attendanceSummaryProgress.visibility = if (show) VISIBLE else GONE
     }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryPresenter.kt
index 8b17f7437..3ce85d815 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryPresenter.kt
@@ -6,8 +6,8 @@ import io.github.wulkanowy.data.repositories.attendancesummary.AttendanceSummary
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.data.repositories.subject.SubjectRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import io.github.wulkanowy.utils.calculatePercentage
@@ -19,24 +19,27 @@ import java.util.concurrent.TimeUnit.MILLISECONDS
 import javax.inject.Inject
 
 class AttendanceSummaryPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val attendanceSummaryRepository: AttendanceSummaryRepository,
     private val subjectRepository: SubjectRepository,
-    private val studentRepository: StudentRepository,
     private val semesterRepository: SemesterRepository,
-    private val schedulers: SchedulersProvider,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<AttendanceSummaryView>(errorHandler) {
+) : BasePresenter<AttendanceSummaryView>(errorHandler, studentRepository, schedulers) {
 
     private var subjects = emptyList<Subject>()
 
     var currentSubjectId = -1
         private set
 
+    private lateinit var lastError: Throwable
+
     fun onAttachView(view: AttendanceSummaryView, subjectId: Int?) {
         super.onAttachView(view)
-        Timber.i("Attendance summary view is attached with subject id ${subjectId ?: -1}")
         view.initView()
+        Timber.i("Attendance summary view was initialized with subject id ${subjectId ?: -1}")
+        errorHandler.showErrorMessage = ::showErrorViewOnError
         loadData(subjectId ?: -1)
         loadSubjects()
     }
@@ -46,12 +49,26 @@ class AttendanceSummaryPresenter @Inject constructor(
         loadData(currentSubjectId, true)
     }
 
-    fun onSubjectSelected(name: String) {
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(currentSubjectId, true)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
+    fun onSubjectSelected(name: String?) {
         Timber.i("Select attendance summary subject $name")
         view?.run {
             showContent(false)
             showProgress(true)
             enableSwipe(false)
+            showEmpty(false)
+            showErrorView(false)
             clearView()
         }
         (subjects.singleOrNull { it.name == name }?.realId ?: -1).let {
@@ -88,13 +105,23 @@ class AttendanceSummaryPresenter @Inject constructor(
                     analytics.logEvent("load_attendance_summary", "items" to it.first.size, "force_refresh" to forceRefresh, "item_id" to subjectId)
                 }) {
                     Timber.i("Loading attendance summary result: An exception occurred")
-                    view?.run { showEmpty(isViewEmpty) }
                     errorHandler.dispatch(it)
                 }
             )
         }
     }
 
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
+
     private fun loadSubjects() {
         Timber.i("Loading attendance summary subjects started")
         disposable.add(studentRepository.getCurrentStudent()
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryView.kt
index e4c36db7b..b86f6590d 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryView.kt
@@ -1,8 +1,8 @@
 package io.github.wulkanowy.ui.modules.attendance.summary
 
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
 
-interface AttendanceSummaryView : BaseSessionView {
+interface AttendanceSummaryView : BaseView {
 
     val isViewEmpty: Boolean
 
@@ -18,6 +18,10 @@ interface AttendanceSummaryView : BaseSessionView {
 
     fun showEmpty(show: Boolean)
 
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
     fun updateDataSet(data: List<AttendanceSummaryItem>, header: AttendanceSummaryScrollableHeader)
 
     fun updateSubjects(data: ArrayList<String>)
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamFragment.kt
index 97e97727f..b880f4650 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamFragment.kt
@@ -13,14 +13,15 @@ import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Exam
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_exam.*
 import javax.inject.Inject
 
-class ExamFragment : BaseSessionFragment(), ExamView, MainView.MainChildView, MainView.TitledView {
+class ExamFragment : BaseFragment(), ExamView, MainView.MainChildView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: ExamPresenter
@@ -34,11 +35,9 @@ class ExamFragment : BaseSessionFragment(), ExamView, MainView.MainChildView, Ma
         fun newInstance() = ExamFragment()
     }
 
-    override val titleStringId: Int
-        get() = R.string.exam_title
+    override val titleStringId get() = R.string.exam_title
 
-    override val isViewEmpty: Boolean
-        get() = examAdapter.isEmpty
+    override val isViewEmpty get() = examAdapter.isEmpty
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.fragment_exam, container, false)
@@ -51,20 +50,24 @@ class ExamFragment : BaseSessionFragment(), ExamView, MainView.MainChildView, Ma
     }
 
     override fun initView() {
-        examAdapter.run {
-            setOnItemClickListener { presenter.onExamItemSelected(it) }
-        }
-        examRecycler.run {
+        examAdapter.setOnItemClickListener(presenter::onExamItemSelected)
+
+        with(examRecycler) {
             layoutManager = SmoothScrollLinearLayoutManager(context)
             adapter = examAdapter
             addItemDecoration(FlexibleItemDecoration(context)
                 .withDefaultDivider(R.layout.item_exam)
-                .withDrawDividerOnLastItem(false)
-            )
+                .withDrawDividerOnLastItem(false))
         }
-        examSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+
+        examSwipe.setOnRefreshListener(presenter::onSwipeRefresh)
+        examErrorRetry.setOnClickListener { presenter.onRetry() }
+        examErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+
         examPreviousButton.setOnClickListener { presenter.onPreviousWeek() }
         examNextButton.setOnClickListener { presenter.onNextWeek() }
+
+        examNavContainer.setElevationCompat(requireContext().dpToPx(8f))
     }
 
     override fun hideRefresh() {
@@ -88,13 +91,21 @@ class ExamFragment : BaseSessionFragment(), ExamView, MainView.MainChildView, Ma
     }
 
     override fun onFragmentReselected() {
-        presenter.onViewReselected()
+        if (::presenter.isInitialized) presenter.onViewReselected()
     }
 
     override fun showEmpty(show: Boolean) {
         examEmpty.visibility = if (show) VISIBLE else GONE
     }
 
+    override fun showErrorView(show: Boolean) {
+        examError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        examErrorMessage.text = message
+    }
+
     override fun showProgress(show: Boolean) {
         examProgress.visibility = if (show) VISIBLE else GONE
     }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamPresenter.kt
index 4b6ef298b..35cf5b945 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamPresenter.kt
@@ -1,16 +1,16 @@
 package io.github.wulkanowy.ui.modules.exam
 
-import com.google.firebase.analytics.FirebaseAnalytics.Param.START_DATE
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.db.entities.Exam
 import io.github.wulkanowy.data.repositories.exam.ExamRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import io.github.wulkanowy.utils.friday
+import io.github.wulkanowy.utils.getLastSchoolDayIfHoliday
 import io.github.wulkanowy.utils.isHolidays
 import io.github.wulkanowy.utils.monday
 import io.github.wulkanowy.utils.nextOrSameSchoolDay
@@ -23,22 +23,28 @@ import java.util.concurrent.TimeUnit.MILLISECONDS
 import javax.inject.Inject
 
 class ExamPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val examRepository: ExamRepository,
-    private val studentRepository: StudentRepository,
     private val semesterRepository: SemesterRepository,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<ExamView>(errorHandler) {
+) : BasePresenter<ExamView>(errorHandler, studentRepository, schedulers) {
+
+    private var baseDate: LocalDate = now().nextOrSameSchoolDay
 
     lateinit var currentDate: LocalDate
         private set
 
+    private lateinit var lastError: Throwable
+
     fun onAttachView(view: ExamView, date: Long?) {
         super.onAttachView(view)
-        Timber.i("Exam view is attached")
         view.initView()
-        loadData(ofEpochDay(date ?: now().nextOrSameSchoolDay.toEpochDay()))
+        Timber.i("Exam view was initialized")
+        errorHandler.showErrorMessage = ::showErrorViewOnError
+        loadData(ofEpochDay(date ?: baseDate.toEpochDay()))
+        if (currentDate.isHolidays) setBaseDateOnHolidays()
         reloadView()
     }
 
@@ -57,6 +63,18 @@ class ExamPresenter @Inject constructor(
         loadData(currentDate, true)
     }
 
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(currentDate, true)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
     fun onExamItemSelected(item: AbstractFlexibleItem<*>?) {
         if (item is ExamItem) {
             Timber.i("Select exam item ${item.exam.id}")
@@ -66,7 +84,7 @@ class ExamPresenter @Inject constructor(
 
     fun onViewReselected() {
         Timber.i("Exam view is reselected")
-        now().nextOrSameSchoolDay.also {
+        baseDate.also {
             if (currentDate != it) {
                 loadData(it)
                 reloadView()
@@ -74,6 +92,20 @@ class ExamPresenter @Inject constructor(
         }
     }
 
+    private fun setBaseDateOnHolidays() {
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .subscribe({
+                baseDate = baseDate.getLastSchoolDayIfHoliday(it.schoolYear)
+                currentDate = baseDate
+                reloadNavigation()
+            }) {
+                Timber.i("Loading semester result: An exception occurred")
+            })
+    }
+
     private fun loadData(date: LocalDate, forceRefresh: Boolean = false) {
         Timber.i("Loading exam data started")
         currentDate = date
@@ -82,9 +114,8 @@ class ExamPresenter @Inject constructor(
             add(studentRepository.getCurrentStudent()
                 .delay(200, MILLISECONDS)
                 .flatMap { semesterRepository.getCurrentSemester(it) }
-                .flatMap {
-                    examRepository.getExams(it, currentDate.monday, currentDate.friday, forceRefresh)
-                }.map { it.groupBy { exam -> exam.date }.toSortedMap() }
+                .flatMap { examRepository.getExams(it, currentDate.monday, currentDate.friday, forceRefresh) }
+                .map { it.groupBy { exam -> exam.date }.toSortedMap() }
                 .map { createExamItems(it) }
                 .subscribeOn(schedulers.backgroundThread)
                 .observeOn(schedulers.mainThread)
@@ -100,17 +131,28 @@ class ExamPresenter @Inject constructor(
                     view?.apply {
                         updateData(it)
                         showEmpty(it.isEmpty())
+                        showErrorView(false)
                         showContent(it.isNotEmpty())
                     }
-                    analytics.logEvent("load_exam", "items" to it.size, "force_refresh" to forceRefresh, START_DATE to currentDate.toFormattedString("yyyy-MM-dd"))
+                    analytics.logEvent("load_exam", "items" to it.size, "force_refresh" to forceRefresh)
                 }) {
                     Timber.i("Loading exam result: An exception occurred")
-                    view?.run { showEmpty(isViewEmpty) }
                     errorHandler.dispatch(it)
                 })
         }
     }
 
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
+
     private fun createExamItems(items: Map<LocalDate, List<Exam>>): List<ExamItem> {
         return items.flatMap {
             ExamHeader(it.key).let { header ->
@@ -126,7 +168,14 @@ class ExamPresenter @Inject constructor(
             enableSwipe(false)
             showContent(false)
             showEmpty(false)
+            showErrorView(false)
             clearData()
+            reloadNavigation()
+        }
+    }
+
+    private fun reloadNavigation() {
+        view?.apply {
             showPreButton(!currentDate.minusDays(7).isHolidays)
             showNextButton(!currentDate.plusDays(7).isHolidays)
             updateNavigationWeek("${currentDate.monday.toFormattedString("dd.MM")} - " +
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamView.kt
index 2ced3f2d4..5f4a74306 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamView.kt
@@ -1,9 +1,9 @@
 package io.github.wulkanowy.ui.modules.exam
 
 import io.github.wulkanowy.data.db.entities.Exam
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
 
-interface ExamView : BaseSessionView {
+interface ExamView : BaseView {
 
     val isViewEmpty: Boolean
 
@@ -21,6 +21,10 @@ interface ExamView : BaseSessionView {
 
     fun showEmpty(show: Boolean)
 
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
     fun showProgress(show: Boolean)
 
     fun enableSwipe(enable: Boolean)
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeAverageProvider.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeAverageProvider.kt
new file mode 100644
index 000000000..88635c37b
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeAverageProvider.kt
@@ -0,0 +1,73 @@
+package io.github.wulkanowy.ui.modules.grade
+
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.data.repositories.grade.GradeRepository
+import io.github.wulkanowy.data.repositories.gradessummary.GradeSummaryRepository
+import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
+import io.github.wulkanowy.sdk.Sdk
+import io.github.wulkanowy.utils.calcAverage
+import io.github.wulkanowy.utils.changeModifier
+import io.reactivex.Maybe
+import io.reactivex.Single
+import javax.inject.Inject
+
+class GradeAverageProvider @Inject constructor(
+    private val preferencesRepository: PreferencesRepository,
+    private val gradeRepository: GradeRepository,
+    private val gradeSummaryRepository: GradeSummaryRepository
+) {
+
+    fun getGradeAverage(student: Student, semesters: List<Semester>, selectedSemesterId: Int, forceRefresh: Boolean): Single<Map<String, Double>> {
+        return when (preferencesRepository.gradeAverageMode) {
+            "all_year" -> getAllYearAverage(student, semesters, selectedSemesterId, forceRefresh)
+            "only_one_semester" -> getOnlyOneSemesterAverage(student, semesters, selectedSemesterId, forceRefresh)
+            else -> throw IllegalArgumentException("Incorrect grade average mode: ${preferencesRepository.gradeAverageMode} ")
+        }
+    }
+
+    private fun getAllYearAverage(student: Student, semesters: List<Semester>, semesterId: Int, forceRefresh: Boolean): Single<Map<String, Double>> {
+        val selectedSemester = semesters.single { it.semesterId == semesterId }
+        val firstSemester = semesters.single { it.diaryId == selectedSemester.diaryId && it.semesterName == 1 }
+        val plusModifier = preferencesRepository.gradePlusModifier
+        val minusModifier = preferencesRepository.gradeMinusModifier
+
+        return getAverageFromGradeSummary(selectedSemester, forceRefresh)
+            .switchIfEmpty(gradeRepository.getGrades(student, selectedSemester, forceRefresh)
+                .flatMap { firstGrades ->
+                    if (selectedSemester == firstSemester) Single.just(firstGrades)
+                    else {
+                        gradeRepository.getGrades(student, firstSemester)
+                            .map { secondGrades -> secondGrades + firstGrades }
+                    }
+                }.map { grades ->
+                    grades.map { if (student.loginMode == Sdk.Mode.SCRAPPER.name) it.changeModifier(plusModifier, minusModifier) else it }
+                        .groupBy { it.subject }
+                        .mapValues { it.value.calcAverage() }
+                })
+    }
+
+    private fun getOnlyOneSemesterAverage(student: Student, semesters: List<Semester>, semesterId: Int, forceRefresh: Boolean): Single<Map<String, Double>> {
+        val selectedSemester = semesters.single { it.semesterId == semesterId }
+        val plusModifier = preferencesRepository.gradePlusModifier
+        val minusModifier = preferencesRepository.gradeMinusModifier
+
+        return getAverageFromGradeSummary(selectedSemester, forceRefresh)
+            .switchIfEmpty(gradeRepository.getGrades(student, selectedSemester, forceRefresh)
+                .map { grades ->
+                    grades.map { if (student.loginMode == Sdk.Mode.SCRAPPER.name) it.changeModifier(plusModifier, minusModifier) else it }
+                        .groupBy { it.subject }
+                        .mapValues { it.value.calcAverage() }
+                })
+    }
+
+    private fun getAverageFromGradeSummary(selectedSemester: Semester, forceRefresh: Boolean): Maybe<Map<String, Double>> {
+        return gradeSummaryRepository.getGradesSummary(selectedSemester, forceRefresh)
+            .toMaybe()
+            .flatMap {
+                if (it.any { summary -> summary.average != .0 }) {
+                    Maybe.just(it.map { summary -> summary.subject to summary.average }.toMap())
+                } else Maybe.empty()
+            }.filter { !preferencesRepository.gradeAverageForceCalc }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeFragment.kt
index 20d3fad70..e8d970010 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeFragment.kt
@@ -11,17 +11,18 @@ import android.view.View.VISIBLE
 import android.view.ViewGroup
 import androidx.appcompat.app.AlertDialog
 import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.base.BaseFragmentPagerAdapter
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
 import io.github.wulkanowy.ui.modules.grade.details.GradeDetailsFragment
 import io.github.wulkanowy.ui.modules.grade.statistics.GradeStatisticsFragment
 import io.github.wulkanowy.ui.modules.grade.summary.GradeSummaryFragment
 import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.setOnSelectPageListener
 import kotlinx.android.synthetic.main.fragment_grade.*
 import javax.inject.Inject
 
-class GradeFragment : BaseSessionFragment(), GradeView, MainView.MainChildView, MainView.TitledView {
+class GradeFragment : BaseFragment(), GradeView, MainView.MainChildView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: GradePresenter
@@ -37,11 +38,9 @@ class GradeFragment : BaseSessionFragment(), GradeView, MainView.MainChildView,
         fun newInstance() = GradeFragment()
     }
 
-    override val titleStringId: Int
-        get() = R.string.grade_title
+    override val titleStringId get() = R.string.grade_title
 
-    override val currentPageIndex: Int
-        get() = gradeViewPager.currentItem
+    override val currentPageIndex get() = gradeViewPager.currentItem
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -57,14 +56,14 @@ class GradeFragment : BaseSessionFragment(), GradeView, MainView.MainChildView,
         presenter.onAttachView(this, savedInstanceState?.getInt(SAVED_SEMESTER_KEY))
     }
 
-    override fun onCreateOptionsMenu(menu: Menu?, inflater: MenuInflater?) {
-        inflater?.inflate(R.menu.action_menu_grade, menu)
-        semesterSwitchMenu = menu?.findItem(R.id.gradeMenuSemester)
+    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
+        inflater.inflate(R.menu.action_menu_grade, menu)
+        semesterSwitchMenu = menu.findItem(R.id.gradeMenuSemester)
         presenter.onCreateMenu()
     }
 
     override fun initView() {
-        pagerAdapter.apply {
+        with(pagerAdapter) {
             containerId = gradeViewPager.id
             addFragmentsWithTitle(mapOf(
                 GradeDetailsFragment.newInstance() to getString(R.string.all_details),
@@ -73,22 +72,28 @@ class GradeFragment : BaseSessionFragment(), GradeView, MainView.MainChildView,
             ))
         }
 
-        gradeViewPager.run {
+        with(gradeViewPager) {
             adapter = pagerAdapter
             offscreenPageLimit = 3
-            setOnSelectPageListener { presenter.onPageSelected(it) }
+            setOnSelectPageListener(presenter::onPageSelected)
         }
-        gradeTabLayout.setupWithViewPager(gradeViewPager)
-        gradeSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+
+        with(gradeTabLayout) {
+            setupWithViewPager(gradeViewPager)
+            setElevationCompat(context.dpToPx(4f))
+        }
+
+        gradeErrorRetry.setOnClickListener { presenter.onRetry() }
+        gradeErrorDetails.setOnClickListener { presenter.onDetailsClick() }
     }
 
-    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
-        return if (item?.itemId == R.id.gradeMenuSemester) presenter.onSemesterSwitch()
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return if (item.itemId == R.id.gradeMenuSemester) presenter.onSemesterSwitch()
         else false
     }
 
     override fun onFragmentReselected() {
-        presenter.onViewReselected()
+        if (::presenter.isInitialized) presenter.onViewReselected()
     }
 
     override fun showContent(show: Boolean) {
@@ -100,36 +105,32 @@ class GradeFragment : BaseSessionFragment(), GradeView, MainView.MainChildView,
         gradeProgress.visibility = if (show) VISIBLE else INVISIBLE
     }
 
-    override fun showEmpty(show: Boolean) {
-        gradeEmpty.visibility = if (show) VISIBLE else INVISIBLE
+    override fun showErrorView(show: Boolean) {
+        gradeError.visibility = if (show) VISIBLE else INVISIBLE
     }
 
-    override fun showRefresh(show: Boolean) {
-        gradeSwipe.isRefreshing = show
+    override fun setErrorDetails(message: String) {
+        gradeErrorMessage.text = message
     }
 
     override fun showSemesterSwitch(show: Boolean) {
         semesterSwitchMenu?.isVisible = show
     }
 
-    override fun enableSwipe(enable: Boolean) {
-        gradeSwipe.isEnabled = enable
-    }
-
     override fun showSemesterDialog(selectedIndex: Int) {
-        arrayOf(getString(R.string.grade_semester, 1),
-            getString(R.string.grade_semester, 2)).also { array ->
-            context?.let {
-                AlertDialog.Builder(it)
-                    .setSingleChoiceItems(array, selectedIndex) { dialog, which ->
-                        presenter.onSemesterSelected(which)
-                        dialog.dismiss()
-                    }
-                    .setTitle(R.string.grade_switch_semester)
-                    .setNegativeButton(android.R.string.cancel) { _, _ -> }
-                    .show()
+        val choices = arrayOf(
+            getString(R.string.grade_semester, 1),
+            getString(R.string.grade_semester, 2)
+        )
+
+        AlertDialog.Builder(requireContext())
+            .setSingleChoiceItems(choices, selectedIndex) { dialog, which ->
+                presenter.onSemesterSelected(which)
+                dialog.dismiss()
             }
-        }
+            .setTitle(R.string.grade_switch_semester)
+            .setNegativeButton(android.R.string.cancel) { _, _ -> }
+            .show()
     }
 
     fun onChildRefresh() {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeModule.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeModule.kt
index 46a923d9a..6e6ca2d63 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeModule.kt
@@ -10,13 +10,13 @@ import io.github.wulkanowy.ui.modules.grade.details.GradeDetailsFragment
 import io.github.wulkanowy.ui.modules.grade.statistics.GradeStatisticsFragment
 import io.github.wulkanowy.ui.modules.grade.summary.GradeSummaryFragment
 
-@Module
+@Suppress("unused")
+@Module(includes = [GradeModule.Static::class])
 abstract class GradeModule {
 
     @Module
-    companion object {
+    object Static {
 
-        @JvmStatic
         @PerFragment
         @Provides
         fun provideGradeAdapter(fragment: GradeFragment) = BaseFragmentPagerAdapter(fragment.childFragmentManager)
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradePresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradePresenter.kt
index 2357e0637..d8c202381 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradePresenter.kt
@@ -3,20 +3,20 @@ package io.github.wulkanowy.ui.modules.grade
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import timber.log.Timber
 import javax.inject.Inject
 
 class GradePresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
-    private val studentRepository: StudentRepository,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val semesterRepository: SemesterRepository,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<GradeView>(errorHandler) {
+) : BasePresenter<GradeView>(errorHandler, studentRepository, schedulers) {
 
     var selectedIndex = 0
         private set
@@ -25,14 +25,14 @@ class GradePresenter @Inject constructor(
 
     private val loadedSemesterId = mutableMapOf<Int, Int>()
 
+    private lateinit var lastError: Throwable
+
     fun onAttachView(view: GradeView, savedIndex: Int?) {
         super.onAttachView(view)
-        Timber.i("Grade view is attached")
         selectedIndex = savedIndex ?: 0
-        view.run {
-            initView()
-            enableSwipe(false)
-        }
+        view.initView()
+        Timber.i("Grade view was initialized with $selectedIndex index")
+        errorHandler.showErrorMessage = ::showErrorViewOnError
         loadData()
     }
 
@@ -71,7 +71,7 @@ class GradePresenter @Inject constructor(
         view?.apply {
             showContent(true)
             showProgress(false)
-            showEmpty(false)
+            showErrorView(false)
             loadedSemesterId[currentPageIndex] = semesterId
         }
     }
@@ -80,10 +80,18 @@ class GradePresenter @Inject constructor(
         if (semesters.isNotEmpty()) loadChild(index)
     }
 
-    fun onSwipeRefresh() {
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
         loadData()
     }
 
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
     private fun loadData() {
         Timber.i("Loading grade data started")
         disposable.add(studentRepository.getCurrentStudent()
@@ -96,25 +104,28 @@ class GradePresenter @Inject constructor(
             }
             .subscribeOn(schedulers.backgroundThread)
             .observeOn(schedulers.mainThread)
-            .doFinally { view?.showRefresh(false) }
+            .doFinally { view?.showProgress(false) }
             .subscribe({
                 view?.run {
                     Timber.i("Loading grade result: Attempt load index $currentPageIndex")
                     loadChild(currentPageIndex)
-                    enableSwipe(false)
+                    showErrorView(false)
                     showSemesterSwitch(true)
                 }
             }) {
                 Timber.i("Loading grade result: An exception occurred")
                 errorHandler.dispatch(it)
-                view?.run {
-                    showProgress(false)
-                    showEmpty(true)
-                    enableSwipe(true)
-                }
             })
     }
 
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        lastError = error
+        view?.run {
+            showErrorView(true)
+            setErrorDetails(message)
+        }
+    }
+
     private fun loadChild(index: Int, forceRefresh: Boolean = false) {
         semesters.first { it.semesterName == selectedIndex }.semesterId.also {
             if (forceRefresh || loadedSemesterId[index] != it) {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeView.kt
index 9fdd46b16..bbdbc32ea 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeView.kt
@@ -1,8 +1,8 @@
 package io.github.wulkanowy.ui.modules.grade
 
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
 
-interface GradeView : BaseSessionView {
+interface GradeView : BaseView {
 
     val currentPageIndex: Int
 
@@ -12,16 +12,14 @@ interface GradeView : BaseSessionView {
 
     fun showProgress(show: Boolean)
 
-    fun showEmpty(show: Boolean)
+    fun showErrorView(show: Boolean)
 
-    fun showRefresh(show: Boolean)
+    fun setErrorDetails(message: String)
 
     fun showSemesterSwitch(show: Boolean)
 
     fun showSemesterDialog(selectedIndex: Int)
 
-    fun enableSwipe(enable: Boolean)
-
     fun notifyChildLoadData(index: Int, semesterId: Int, forceRefresh: Boolean)
 
     fun notifyChildParentReselected(index: Int)
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsFragment.kt
index 205cde771..195ae11df 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsFragment.kt
@@ -17,7 +17,7 @@ import eu.davidea.flexibleadapter.items.IExpandable
 import eu.davidea.flexibleadapter.items.IFlexible
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Grade
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.grade.GradeFragment
 import io.github.wulkanowy.ui.modules.grade.GradeView
 import io.github.wulkanowy.ui.modules.main.MainActivity
@@ -25,7 +25,7 @@ import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_grade_details.*
 import javax.inject.Inject
 
-class GradeDetailsFragment : BaseSessionFragment(), GradeDetailsView, GradeView.GradeChildView {
+class GradeDetailsFragment : BaseFragment(), GradeDetailsView, GradeView.GradeChildView {
 
     @Inject
     lateinit var presenter: GradeDetailsPresenter
@@ -33,6 +33,8 @@ class GradeDetailsFragment : BaseSessionFragment(), GradeDetailsView, GradeView.
     @Inject
     lateinit var gradeDetailsAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
 
+    private var gradeDetailsMenu: Menu? = null
+
     companion object {
         fun newInstance() = GradeDetailsFragment()
     }
@@ -67,8 +69,10 @@ class GradeDetailsFragment : BaseSessionFragment(), GradeDetailsView, GradeView.
         presenter.onAttachView(this)
     }
 
-    override fun onCreateOptionsMenu(menu: Menu?, inflater: MenuInflater?) {
-        inflater?.inflate(R.menu.action_menu_grade_details, menu)
+    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
+        inflater.inflate(R.menu.action_menu_grade_details, menu)
+        gradeDetailsMenu = menu
+        presenter.updateMarkAsDoneButton()
     }
 
     override fun initView() {
@@ -86,10 +90,12 @@ class GradeDetailsFragment : BaseSessionFragment(), GradeDetailsView, GradeView.
             )
         }
         gradeDetailsSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+        gradeDetailsErrorRetry.setOnClickListener { presenter.onRetry() }
+        gradeDetailsErrorDetails.setOnClickListener { presenter.onDetailsClick() }
     }
 
-    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
-        return if (item?.itemId == R.id.gradeDetailsMenuRead) presenter.onMarkAsReadSelected()
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return if (item.itemId == R.id.gradeDetailsMenuRead) presenter.onMarkAsReadSelected()
         else false
     }
 
@@ -137,6 +143,14 @@ class GradeDetailsFragment : BaseSessionFragment(), GradeDetailsView, GradeView.
         gradeDetailsEmpty.visibility = if (show) VISIBLE else INVISIBLE
     }
 
+    override fun showErrorView(show: Boolean) {
+        gradeDetailsError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        gradeDetailsErrorMessage.text = message
+    }
+
     override fun showRefresh(show: Boolean) {
         gradeDetailsSwipe.isRefreshing = show
     }
@@ -165,6 +179,10 @@ class GradeDetailsFragment : BaseSessionFragment(), GradeDetailsView, GradeView.
         (parentFragment as? GradeFragment)?.onChildRefresh()
     }
 
+    override fun enableMarkAsDoneButton(enable: Boolean) {
+        gradeDetailsMenu?.findItem(R.id.gradeDetailsMenuRead)?.isEnabled = enable
+    }
+
     override fun onDestroyView() {
         super.onDestroyView()
         presenter.onDetachView()
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsHeader.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsHeader.kt
index e5f6e8249..9ed412808 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsHeader.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsHeader.kt
@@ -38,6 +38,7 @@ class GradeDetailsHeader(
             gradeHeaderAverage.text = average
             gradeHeaderNumber.text = number
             gradeHeaderNote.visibility = if (newGrades > 0) VISIBLE else GONE
+            if (newGrades > 0) gradeHeaderNote.text = newGrades.toString(10)
             gradeHeaderContainer.isEnabled = isExpandable
 
             isViewExpandable = isExpandable
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsPresenter.kt
index 1be0b36f9..647047c69 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsPresenter.kt
@@ -6,31 +6,36 @@ import io.github.wulkanowy.data.repositories.grade.GradeRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.ui.modules.grade.GradeAverageProvider
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
-import io.github.wulkanowy.utils.calcAverage
-import io.github.wulkanowy.utils.changeModifier
 import io.github.wulkanowy.utils.getBackgroundColor
 import timber.log.Timber
 import javax.inject.Inject
 
 class GradeDetailsPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val gradeRepository: GradeRepository,
-    private val studentRepository: StudentRepository,
     private val semesterRepository: SemesterRepository,
     private val preferencesRepository: PreferencesRepository,
+    private val averageProvider: GradeAverageProvider,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<GradeDetailsView>(errorHandler) {
+) : BasePresenter<GradeDetailsView>(errorHandler, studentRepository, schedulers) {
+
+    private var newGradesAmount: Int = 0
 
     private var currentSemesterId = 0
 
+    private lateinit var lastError: Throwable
+
     override fun onAttachView(view: GradeDetailsView) {
         super.onAttachView(view)
         view.initView()
+        errorHandler.showErrorMessage = ::showErrorViewOnError
     }
 
     fun onParentViewLoadData(semesterId: Int, forceRefresh: Boolean) {
@@ -52,6 +57,8 @@ class GradeDetailsPresenter @Inject constructor(
                             updateItem(header)
                         }
                     }
+                    newGradesAmount--
+                    updateMarkAsDoneButton()
                     updateGrade(item.grade)
                 }
             }
@@ -85,6 +92,18 @@ class GradeDetailsPresenter @Inject constructor(
         view?.notifyParentRefresh()
     }
 
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        view?.notifyParentRefresh()
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
     fun onParentViewReselected() {
         view?.run {
             if (!isViewEmpty) {
@@ -106,14 +125,23 @@ class GradeDetailsPresenter @Inject constructor(
         disposable.clear()
     }
 
+    fun updateMarkAsDoneButton() {
+        view?.enableMarkAsDoneButton(newGradesAmount > 0)
+    }
+
     private fun loadData(semesterId: Int, forceRefresh: Boolean) {
         Timber.i("Loading grade details data started")
         disposable.add(studentRepository.getCurrentStudent()
-            .flatMap { semesterRepository.getSemesters(it).map { semester -> semester to it } }
-            .flatMap { gradeRepository.getGrades(it.second, it.first.first { item -> item.semesterId == semesterId }, forceRefresh) }
-            .map { it.sortedByDescending { grade -> grade.date } }
-            .map { it.map { item -> item.changeModifier(preferencesRepository.gradePlusModifier, preferencesRepository.gradeMinusModifier) } }
-            .map { createGradeItems(it.groupBy { grade -> grade.subject }.toSortedMap()) }
+            .flatMap { semesterRepository.getSemesters(it).map { semester -> it to semester } }
+            .flatMap { (student, semesters) ->
+                averageProvider.getGradeAverage(student, semesters, semesterId, forceRefresh)
+                    .flatMap { averages ->
+                        gradeRepository.getGrades(student, semesters.first { it.semesterId == semesterId }, forceRefresh)
+                            .map { it.sortedByDescending { grade -> grade.date } }
+                            .map { it.groupBy { grade -> grade.subject }.toSortedMap() }
+                            .map { createGradeItems(it, averages) }
+                    }
+            }
             .subscribeOn(schedulers.backgroundThread)
             .observeOn(schedulers.mainThread)
             .doFinally {
@@ -126,45 +154,62 @@ class GradeDetailsPresenter @Inject constructor(
             }
             .subscribe({
                 Timber.i("Loading grade details result: Success")
+                newGradesAmount = it.sumBy { gradeDetailsHeader -> gradeDetailsHeader.newGrades }
+                updateMarkAsDoneButton()
                 view?.run {
                     showEmpty(it.isEmpty())
+                    showErrorView(false)
                     showContent(it.isNotEmpty())
                     updateData(it)
                 }
                 analytics.logEvent("load_grade_details", "items" to it.size, "force_refresh" to forceRefresh)
             }) {
                 Timber.i("Loading grade details result: An exception occurred")
-                view?.run { showEmpty(isViewEmpty) }
                 errorHandler.dispatch(it)
             })
     }
 
-    private fun createGradeItems(items: Map<String, List<Grade>>): List<GradeDetailsHeader> {
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
+
+    private fun createGradeItems(items: Map<String, List<Grade>>, averages: Map<String, Double>): List<GradeDetailsHeader> {
+        val isGradeExpandable = preferencesRepository.isGradeExpandable
+        val gradeColorTheme = preferencesRepository.gradeColorTheme
+
+        val noDescriptionString = view?.noDescriptionString.orEmpty()
+        val weightString = view?.weightString.orEmpty()
+
         return items.map {
-            it.value.calcAverage().let { average ->
-                GradeDetailsHeader(
-                    subject = it.key,
-                    average = formatAverage(average),
-                    number = view?.getGradeNumberString(it.value.size).orEmpty(),
-                    newGrades = it.value.filter { grade -> !grade.isRead }.size,
-                    isExpandable = preferencesRepository.isGradeExpandable
-                ).apply {
-                    subItems = it.value.map { item ->
-                        GradeDetailsItem(
-                            grade = item,
-                            valueBgColor = item.getBackgroundColor(preferencesRepository.gradeColorTheme),
-                            weightString = view?.weightString.orEmpty(),
-                            noDescriptionString = view?.noDescriptionString.orEmpty()
-                        )
-                    }
+            GradeDetailsHeader(
+                subject = it.key,
+                average = formatAverage(averages[it.key]),
+                number = view?.getGradeNumberString(it.value.size).orEmpty(),
+                newGrades = it.value.filter { grade -> !grade.isRead }.size,
+                isExpandable = isGradeExpandable
+            ).apply {
+                subItems = it.value.map { item ->
+                    GradeDetailsItem(
+                        grade = item,
+                        valueBgColor = item.getBackgroundColor(gradeColorTheme),
+                        weightString = weightString,
+                        noDescriptionString = noDescriptionString
+                    )
                 }
             }
         }
     }
 
-    private fun formatAverage(average: Double): String {
+    private fun formatAverage(average: Double?): String {
         return view?.run {
-            if (average == 0.0) emptyAverageString
+            if (average == null || average == .0) emptyAverageString
             else averageString.format(average)
         }.orEmpty()
     }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsView.kt
index 1fb98216b..dad4ac6eb 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsView.kt
@@ -4,9 +4,9 @@ import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import eu.davidea.flexibleadapter.items.IExpandable
 import eu.davidea.flexibleadapter.items.IFlexible
 import io.github.wulkanowy.data.db.entities.Grade
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
 
-interface GradeDetailsView : BaseSessionView {
+interface GradeDetailsView : BaseView {
 
     val isViewEmpty: Boolean
 
@@ -38,6 +38,10 @@ interface GradeDetailsView : BaseSessionView {
 
     fun showProgress(show: Boolean)
 
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
     fun enableSwipe(enable: Boolean)
 
     fun showRefresh(show: Boolean)
@@ -46,6 +50,8 @@ interface GradeDetailsView : BaseSessionView {
 
     fun notifyParentRefresh()
 
+    fun enableMarkAsDoneButton(enable: Boolean)
+
     fun getGradeNumberString(number: Int): String
 
     fun getHeaderOfItem(item: AbstractFlexibleItem<*>): IExpandable<*, out IFlexible<*>>?
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsFragment.kt
index f27a13c83..a65cab9c9 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsFragment.kt
@@ -1,5 +1,6 @@
 package io.github.wulkanowy.ui.modules.grade.statistics
 
+import android.graphics.Color
 import android.graphics.Color.WHITE
 import android.os.Bundle
 import android.view.LayoutInflater
@@ -10,21 +11,26 @@ import android.widget.TextView
 import androidx.core.content.ContextCompat
 import com.github.mikephil.charting.components.Legend
 import com.github.mikephil.charting.components.LegendEntry
+import com.github.mikephil.charting.data.BarData
+import com.github.mikephil.charting.data.BarDataSet
+import com.github.mikephil.charting.data.BarEntry
 import com.github.mikephil.charting.data.PieData
 import com.github.mikephil.charting.data.PieDataSet
 import com.github.mikephil.charting.data.PieEntry
 import com.github.mikephil.charting.formatter.ValueFormatter
 import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.GradePointsStatistics
 import io.github.wulkanowy.data.db.entities.GradeStatistics
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.grade.GradeFragment
 import io.github.wulkanowy.ui.modules.grade.GradeView
+import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.getThemeAttrColor
 import io.github.wulkanowy.utils.setOnItemSelectedListener
 import kotlinx.android.synthetic.main.fragment_grade_statistics.*
 import javax.inject.Inject
 
-class GradeStatisticsFragment : BaseSessionFragment(), GradeStatisticsView, GradeView.GradeChildView {
+class GradeStatisticsFragment : BaseFragment(), GradeStatisticsView, GradeView.GradeChildView {
 
     @Inject
     lateinit var presenter: GradeStatisticsPresenter
@@ -37,8 +43,16 @@ class GradeStatisticsFragment : BaseSessionFragment(), GradeStatisticsView, Grad
         fun newInstance() = GradeStatisticsFragment()
     }
 
-    override val isViewEmpty
-        get() = gradeStatisticsChart.isEmpty
+    override val isPieViewEmpty get() = gradeStatisticsChart.isEmpty
+
+    override val isBarViewEmpty get() = gradeStatisticsChartPoints.isEmpty
+
+    override val currentType
+        get() = when (gradeStatisticsTypeSwitch.checkedRadioButtonId) {
+            R.id.gradeStatisticsTypeSemester -> ViewType.SEMESTER
+            R.id.gradeStatisticsTypePartial -> ViewType.PARTIAL
+            else -> ViewType.POINTS
+        }
 
     private lateinit var gradeColors: List<Pair<Int, Int>>
 
@@ -60,6 +74,11 @@ class GradeStatisticsFragment : BaseSessionFragment(), GradeStatisticsView, Grad
         1 to R.color.grade_material_one
     )
 
+    private val gradePointsColors = listOf(
+        Color.parseColor("#37c69c"),
+        Color.parseColor("#d8b12a")
+    )
+
     private val gradeLabels = listOf(
         "6, 6-", "5, 5-, 5+", "4, 4-, 4+", "3, 3-, 3+", "2, 2-, 2+", "1, 1+"
     )
@@ -70,60 +89,69 @@ class GradeStatisticsFragment : BaseSessionFragment(), GradeStatisticsView, Grad
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
-        messageContainer = gradeStatisticsChart
-        presenter.onAttachView(this, savedInstanceState?.getBoolean(SAVED_CHART_TYPE))
+        messageContainer = gradeStatisticsSwipe
+        presenter.onAttachView(this, savedInstanceState?.getSerializable(SAVED_CHART_TYPE) as? ViewType)
     }
 
     override fun initView() {
-        gradeStatisticsChart.run {
+        with(gradeStatisticsChart) {
             description.isEnabled = false
             setHoleColor(context.getThemeAttrColor(android.R.attr.windowBackground))
             setCenterTextColor(context.getThemeAttrColor(android.R.attr.textColorPrimary))
             animateXY(1000, 1000)
             minAngleForSlices = 25f
-            legend.apply {
-                textColor = context.getThemeAttrColor(android.R.attr.textColorPrimary)
-            }
+            legend.textColor = context.getThemeAttrColor(android.R.attr.textColorPrimary)
         }
 
-        context?.let {
-            subjectsAdapter = ArrayAdapter(it, android.R.layout.simple_spinner_item, ArrayList<String>())
-            subjectsAdapter.setDropDownViewResource(R.layout.item_attendance_summary_subject)
+        with(gradeStatisticsChartPoints) {
+            description.isEnabled = false
+
+            animateXY(1000, 1000)
+            legend.textColor = context.getThemeAttrColor(android.R.attr.textColorPrimary)
         }
 
-        gradeStatisticsSubjects.run {
+        subjectsAdapter = ArrayAdapter(requireContext(), android.R.layout.simple_spinner_item, mutableListOf())
+        subjectsAdapter.setDropDownViewResource(R.layout.item_attendance_summary_subject)
+
+        with(gradeStatisticsSubjects) {
             adapter = subjectsAdapter
-            setOnItemSelectedListener { presenter.onSubjectSelected((it as TextView).text.toString()) }
+            setOnItemSelectedListener<TextView> { presenter.onSubjectSelected(it?.text?.toString()) }
         }
 
-        gradeStatisticsSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+        gradeStatisticsSubjectsContainer.setElevationCompat(requireContext().dpToPx(1f))
+
+        gradeStatisticsSwipe.setOnRefreshListener(presenter::onSwipeRefresh)
+        gradeStatisticsErrorRetry.setOnClickListener { presenter.onRetry() }
+        gradeStatisticsErrorDetails.setOnClickListener { presenter.onDetailsClick() }
     }
 
     override fun updateSubjects(data: ArrayList<String>) {
-        subjectsAdapter.run {
+        with(subjectsAdapter) {
             clear()
             addAll(data)
             notifyDataSetChanged()
         }
     }
 
-    override fun updateData(items: List<GradeStatistics>, theme: String) {
+    override fun updatePieData(items: List<GradeStatistics>, theme: String) {
         gradeColors = when (theme) {
             "vulcan" -> vulcanGradeColors
             else -> materialGradeColors
         }
 
-        gradeStatisticsChart.run {
-            data = PieData(PieDataSet(items.map {
-                PieEntry(it.amount.toFloat(), it.grade.toString())
-            }, "Legenda").apply {
-                valueTextSize = 12f
-                sliceSpace = 1f
-                valueTextColor = WHITE
-                setColors(items.map {
-                    gradeColors.single { color -> color.first == it.grade }.second
-                }.toIntArray(), context)
-            }).apply {
+        val dataset = PieDataSet(items.map {
+            PieEntry(it.amount.toFloat(), it.grade.toString())
+        }, "Legenda").apply {
+            valueTextSize = 12f
+            sliceSpace = 1f
+            valueTextColor = WHITE
+            setColors(items.map {
+                gradeColors.single { color -> color.first == it.grade }.second
+            }.toIntArray(), context)
+        }
+
+        with(gradeStatisticsChart) {
+            data = PieData(dataset).apply {
                 setTouchEnabled(false)
                 setValueFormatter(object : ValueFormatter() {
                     override fun getPieLabel(value: Float, pieEntry: PieEntry): String {
@@ -146,6 +174,47 @@ class GradeStatisticsFragment : BaseSessionFragment(), GradeStatisticsView, Grad
         }
     }
 
+    override fun updateBarData(item: GradePointsStatistics) {
+        val dataset = BarDataSet(listOf(
+            BarEntry(1f, item.others.toFloat()),
+            BarEntry(2f, item.student.toFloat())
+        ), "Legenda").apply {
+            valueTextSize = 12f
+            valueTextColor = requireContext().getThemeAttrColor(android.R.attr.textColorPrimary)
+            valueFormatter = object : ValueFormatter() {
+                override fun getBarLabel(barEntry: BarEntry) = "${barEntry.y}%"
+            }
+            colors = gradePointsColors
+        }
+
+        with(gradeStatisticsChartPoints) {
+            data = BarData(dataset).apply {
+                barWidth = 0.5f
+                setFitBars(true)
+            }
+            setTouchEnabled(false)
+            xAxis.setDrawLabels(false)
+            xAxis.setDrawGridLines(false)
+            requireContext().getThemeAttrColor(android.R.attr.textColorPrimary).let {
+                axisLeft.textColor = it
+                axisRight.textColor = it
+            }
+            legend.setCustom(listOf(
+                LegendEntry().apply {
+                    label = "Średnia klasy"
+                    formColor = gradePointsColors[0]
+                    form = Legend.LegendForm.SQUARE
+                },
+                LegendEntry().apply {
+                    label = "Uczeń"
+                    formColor = gradePointsColors[1]
+                    form = Legend.LegendForm.SQUARE
+                }
+            ))
+            invalidate()
+        }
+    }
+
     override fun showSubjects(show: Boolean) {
         gradeStatisticsSubjectsContainer.visibility = if (show) View.VISIBLE else View.INVISIBLE
         gradeStatisticsTypeSwitch.visibility = if (show) View.VISIBLE else View.INVISIBLE
@@ -153,16 +222,29 @@ class GradeStatisticsFragment : BaseSessionFragment(), GradeStatisticsView, Grad
 
     override fun clearView() {
         gradeStatisticsChart.clear()
+        gradeStatisticsChartPoints.clear()
     }
 
-    override fun showContent(show: Boolean) {
+    override fun showPieContent(show: Boolean) {
         gradeStatisticsChart.visibility = if (show) View.VISIBLE else View.GONE
     }
 
+    override fun showBarContent(show: Boolean) {
+        gradeStatisticsChartPoints.visibility = if (show) View.VISIBLE else View.GONE
+    }
+
     override fun showEmpty(show: Boolean) {
         gradeStatisticsEmpty.visibility = if (show) View.VISIBLE else View.INVISIBLE
     }
 
+    override fun showErrorView(show: Boolean) {
+        gradeStatisticsError.visibility = if (show) View.VISIBLE else View.GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        gradeStatisticsErrorMessage.text = message
+    }
+
     override fun showProgress(show: Boolean) {
         gradeStatisticsProgress.visibility = if (show) View.VISIBLE else View.GONE
     }
@@ -197,14 +279,12 @@ class GradeStatisticsFragment : BaseSessionFragment(), GradeStatisticsView, Grad
 
     override fun onResume() {
         super.onResume()
-        gradeStatisticsTypeSwitch.setOnCheckedChangeListener { _, checkedId ->
-            presenter.onTypeChange(checkedId == R.id.gradeStatisticsTypeSemester)
-        }
+        gradeStatisticsTypeSwitch.setOnCheckedChangeListener { _, _ -> presenter.onTypeChange() }
     }
 
     override fun onSaveInstanceState(outState: Bundle) {
         super.onSaveInstanceState(outState)
-        outState.putBoolean(GradeStatisticsFragment.SAVED_CHART_TYPE, presenter.currentIsSemester)
+        outState.putSerializable(SAVED_CHART_TYPE, presenter.currentType)
     }
 
     override fun onDestroyView() {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsPresenter.kt
index 5dd485cd5..bea70ea42 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsPresenter.kt
@@ -6,23 +6,23 @@ import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.data.repositories.subject.SubjectRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import timber.log.Timber
 import javax.inject.Inject
 
 class GradeStatisticsPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val gradeStatisticsRepository: GradeStatisticsRepository,
     private val subjectRepository: SubjectRepository,
-    private val studentRepository: StudentRepository,
     private val semesterRepository: SemesterRepository,
     private val preferencesRepository: PreferencesRepository,
-    private val schedulers: SchedulersProvider,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<GradeStatisticsView>(errorHandler) {
+) : BasePresenter<GradeStatisticsView>(errorHandler, studentRepository, schedulers) {
 
     private var subjects = emptyList<Subject>()
 
@@ -30,19 +30,22 @@ class GradeStatisticsPresenter @Inject constructor(
 
     private var currentSubjectName: String = "Wszystkie"
 
-    var currentIsSemester = false
+    private lateinit var lastError: Throwable
+
+    var currentType: ViewType = ViewType.PARTIAL
         private set
 
-    fun onAttachView(view: GradeStatisticsView, isSemester: Boolean?) {
+    fun onAttachView(view: GradeStatisticsView, type: ViewType?) {
         super.onAttachView(view)
-        currentIsSemester = isSemester ?: false
+        currentType = type ?: ViewType.PARTIAL
         view.initView()
+        errorHandler.showErrorMessage = ::showErrorViewOnError
     }
 
     fun onParentViewLoadData(semesterId: Int, forceRefresh: Boolean) {
         currentSemesterId = semesterId
         loadSubjects()
-        loadData(semesterId, currentSubjectName, currentIsSemester, forceRefresh)
+        loadDataByType(semesterId, currentSubjectName, currentType, forceRefresh)
     }
 
     fun onParentViewChangeSemester() {
@@ -50,7 +53,8 @@ class GradeStatisticsPresenter @Inject constructor(
             showProgress(true)
             enableSwipe(false)
             showRefresh(false)
-            showContent(false)
+            showBarContent(false)
+            showErrorView(false)
             showEmpty(false)
             clearView()
         }
@@ -62,31 +66,48 @@ class GradeStatisticsPresenter @Inject constructor(
         view?.notifyParentRefresh()
     }
 
-    fun onSubjectSelected(name: String) {
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        view?.notifyParentRefresh()
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
+    fun onSubjectSelected(name: String?) {
         Timber.i("Select grade stats subject $name")
         view?.run {
-            showContent(false)
+            showBarContent(false)
+            showPieContent(false)
             showProgress(true)
             enableSwipe(false)
             showEmpty(false)
+            showErrorView(false)
             clearView()
         }
-        (subjects.singleOrNull { it.name == name }?.name).let {
-            if (it != currentSubjectName) loadData(currentSemesterId, name, currentIsSemester)
+        (subjects.singleOrNull { it.name == name }?.name)?.let {
+            if (it != currentSubjectName) loadDataByType(currentSemesterId, it, currentType)
         }
     }
 
-    fun onTypeChange(isSemester: Boolean) {
-        Timber.i("Select grade stats semester: $isSemester")
+    fun onTypeChange() {
+        val type = view?.let { it.currentType } ?: ViewType.POINTS
+        Timber.i("Select grade stats semester: $type")
         disposable.clear()
         view?.run {
-            showContent(false)
+            showBarContent(false)
+            showPieContent(false)
             showProgress(true)
             enableSwipe(false)
             showEmpty(false)
+            showErrorView(false)
             clearView()
         }
-        loadData(currentSemesterId, currentSubjectName, isSemester)
+        loadDataByType(currentSemesterId, currentSubjectName, type)
     }
 
     private fun loadSubjects() {
@@ -111,10 +132,18 @@ class GradeStatisticsPresenter @Inject constructor(
         )
     }
 
+    private fun loadDataByType(semesterId: Int, subjectName: String, type: ViewType, forceRefresh: Boolean = false) {
+        currentSubjectName = subjectName
+        currentType = type
+        when (type) {
+            ViewType.SEMESTER -> loadData(semesterId, subjectName, true, forceRefresh)
+            ViewType.PARTIAL -> loadData(semesterId, subjectName, false, forceRefresh)
+            ViewType.POINTS -> loadPointsData(semesterId, subjectName, forceRefresh)
+        }
+    }
+
     private fun loadData(semesterId: Int, subjectName: String, isSemester: Boolean, forceRefresh: Boolean = false) {
         Timber.i("Loading grade stats data started")
-        currentSubjectName = subjectName
-        currentIsSemester = isSemester
         disposable.add(studentRepository.getCurrentStudent()
             .flatMap { semesterRepository.getSemesters(it) }
             .flatMap { gradeStatisticsRepository.getGradesStatistics(it.first { item -> item.semesterId == semesterId }, subjectName, isSemester, forceRefresh) }
@@ -134,14 +163,64 @@ class GradeStatisticsPresenter @Inject constructor(
                 Timber.i("Loading grade stats result: Success")
                 view?.run {
                     showEmpty(it.isEmpty())
-                    showContent(it.isNotEmpty())
-                    updateData(it, preferencesRepository.gradeColorTheme)
+                    showBarContent(false)
+                    showPieContent(it.isNotEmpty())
+                    showErrorView(false)
+                    updatePieData(it, preferencesRepository.gradeColorTheme)
                 }
                 analytics.logEvent("load_grade_statistics", "items" to it.size, "force_refresh" to forceRefresh)
             }) {
                 Timber.e("Loading grade stats result: An exception occurred")
-                view?.run { showEmpty(isViewEmpty) }
                 errorHandler.dispatch(it)
             })
     }
+
+    private fun loadPointsData(semesterId: Int, subjectName: String, forceRefresh: Boolean = false) {
+        Timber.i("Loading grade points stats data started")
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getSemesters(it) }
+            .flatMapMaybe { gradeStatisticsRepository.getGradesPointsStatistics(it.first { item -> item.semesterId == semesterId }, subjectName, forceRefresh) }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doFinally {
+                view?.run {
+                    showRefresh(false)
+                    showProgress(false)
+                    enableSwipe(true)
+                    notifyParentDataLoaded(semesterId)
+                }
+            }
+            .subscribe({
+                Timber.i("Loading grade points stats result: Success")
+                view?.run {
+                    showEmpty(false)
+                    showPieContent(false)
+                    showBarContent(true)
+                    showErrorView(false)
+                    updateBarData(it)
+                }
+                analytics.logEvent("load_grade_points_statistics", "force_refresh" to forceRefresh)
+            }, {
+                Timber.e("Loading grade points stats result: An exception occurred")
+                errorHandler.dispatch(it)
+            }, {
+                Timber.d("Loading grade points stats result: No point stats found")
+                view?.run {
+                    showBarContent(false)
+                    showEmpty(true)
+                }
+            })
+        )
+    }
+
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if ((isBarViewEmpty && currentType == ViewType.POINTS) || (isPieViewEmpty) && currentType != ViewType.POINTS) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsView.kt
index dbdde459e..003520fbd 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsView.kt
@@ -1,17 +1,24 @@
 package io.github.wulkanowy.ui.modules.grade.statistics
 
+import io.github.wulkanowy.data.db.entities.GradePointsStatistics
 import io.github.wulkanowy.data.db.entities.GradeStatistics
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
 
-interface GradeStatisticsView : BaseSessionView {
+interface GradeStatisticsView : BaseView {
 
-    val isViewEmpty: Boolean
+    val isPieViewEmpty: Boolean
+
+    val isBarViewEmpty: Boolean
+
+    val currentType: ViewType
 
     fun initView()
 
     fun updateSubjects(data: ArrayList<String>)
 
-    fun updateData(items: List<GradeStatistics>, theme: String)
+    fun updatePieData(items: List<GradeStatistics>, theme: String)
+
+    fun updateBarData(item: GradePointsStatistics)
 
     fun showSubjects(show: Boolean)
 
@@ -21,10 +28,16 @@ interface GradeStatisticsView : BaseSessionView {
 
     fun clearView()
 
-    fun showContent(show: Boolean)
+    fun showPieContent(show: Boolean)
+
+    fun showBarContent(show: Boolean)
 
     fun showEmpty(show: Boolean)
 
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
     fun showProgress(show: Boolean)
 
     fun enableSwipe(enable: Boolean)
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/ViewType.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/ViewType.kt
new file mode 100644
index 000000000..08c37d587
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/ViewType.kt
@@ -0,0 +1,7 @@
+package io.github.wulkanowy.ui.modules.grade.statistics
+
+enum class ViewType {
+    SEMESTER,
+    PARTIAL,
+    POINTS
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryFragment.kt
index f174f96c2..05fde5227 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryFragment.kt
@@ -11,13 +11,13 @@ import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.grade.GradeFragment
 import io.github.wulkanowy.ui.modules.grade.GradeView
 import kotlinx.android.synthetic.main.fragment_grade_summary.*
 import javax.inject.Inject
 
-class GradeSummaryFragment : BaseSessionFragment(), GradeSummaryView, GradeView.GradeChildView {
+class GradeSummaryFragment : BaseFragment(), GradeSummaryView, GradeView.GradeChildView {
 
     @Inject
     lateinit var presenter: GradeSummaryPresenter
@@ -56,6 +56,8 @@ class GradeSummaryFragment : BaseSessionFragment(), GradeSummaryView, GradeView.
             adapter = gradeSummaryAdapter
         }
         gradeSummarySwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+        gradeSummaryErrorRetry.setOnClickListener { presenter.onRetry() }
+        gradeSummaryErrorDetails.setOnClickListener { presenter.onDetailsClick() }
     }
 
     override fun updateData(data: List<GradeSummaryItem>, header: GradeSummaryScrollableHeader) {
@@ -82,6 +84,14 @@ class GradeSummaryFragment : BaseSessionFragment(), GradeSummaryView, GradeView.
         gradeSummaryEmpty.visibility = if (show) VISIBLE else INVISIBLE
     }
 
+    override fun showErrorView(show: Boolean) {
+        gradeSummaryError.visibility = if (show) VISIBLE else INVISIBLE
+    }
+
+    override fun setErrorDetails(message: String) {
+        gradeSummaryErrorMessage.text = message
+    }
+
     override fun showProgress(show: Boolean) {
         gradeSummaryProgress.visibility = if (show) VISIBLE else GONE
     }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryItem.kt
index 5737a832f..95c32d176 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryItem.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryItem.kt
@@ -1,19 +1,21 @@
 package io.github.wulkanowy.ui.modules.grade.summary
 
+import android.annotation.SuppressLint
 import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import eu.davidea.flexibleadapter.items.IFlexible
 import eu.davidea.viewholders.FlexibleViewHolder
 import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.GradeSummary
 import kotlinx.android.extensions.LayoutContainer
 import kotlinx.android.synthetic.main.item_grade_summary.*
 
 class GradeSummaryItem(
-    private val title: String,
-    private val average: String,
-    private val predictedGrade: String,
-    private val finalGrade: String
+    val summary: GradeSummary,
+    private val average: String
 ) : AbstractFlexibleItem<GradeSummaryItem.ViewHolder>() {
 
     override fun getLayoutRes() = R.layout.item_grade_summary
@@ -22,12 +24,16 @@ class GradeSummaryItem(
         return ViewHolder(view, adapter)
     }
 
+    @SuppressLint("SetTextI18n")
     override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
         holder.run {
-            gradeSummaryItemTitle.text = title
+            gradeSummaryItemTitle.text = summary.subject
+            gradeSummaryItemPoints.text = summary.pointsSum
             gradeSummaryItemAverage.text = average
-            gradeSummaryItemPredicted.text = predictedGrade
-            gradeSummaryItemFinal.text = finalGrade
+            gradeSummaryItemPredicted.text = "${summary.predictedGrade} ${summary.proposedPoints}".trim()
+            gradeSummaryItemFinal.text = "${summary.finalGrade} ${summary.finalPoints}".trim()
+
+            gradeSummaryItemPointsContainer.visibility = if (summary.pointsSum.isBlank()) GONE else VISIBLE
         }
     }
 
@@ -38,18 +44,16 @@ class GradeSummaryItem(
         other as GradeSummaryItem
 
         if (average != other.average) return false
-        if (title != other.title) return false
-        if (predictedGrade != other.predictedGrade) return false
-        if (finalGrade != other.finalGrade) return false
+        if (summary != other.summary) return false
+        if (summary.id != other.summary.id) return false
 
         return true
     }
 
     override fun hashCode(): Int {
-        var result = title.hashCode()
+        var result = summary.hashCode()
+        result = 31 * result + summary.id.hashCode()
         result = 31 * result + average.hashCode()
-        result = 31 * result + predictedGrade.hashCode()
-        result = 31 * result + finalGrade.hashCode()
         return result
     }
 
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryPresenter.kt
index 5dbf75134..1aaa9d097 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryPresenter.kt
@@ -1,60 +1,48 @@
 package io.github.wulkanowy.ui.modules.grade.summary
 
 import io.github.wulkanowy.data.db.entities.GradeSummary
-import io.github.wulkanowy.data.repositories.grade.GradeRepository
 import io.github.wulkanowy.data.repositories.gradessummary.GradeSummaryRepository
-import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.ui.modules.grade.GradeAverageProvider
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import io.github.wulkanowy.utils.calcAverage
-import io.github.wulkanowy.utils.changeModifier
 import timber.log.Timber
 import java.lang.String.format
 import java.util.Locale.FRANCE
 import javax.inject.Inject
 
 class GradeSummaryPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val gradeSummaryRepository: GradeSummaryRepository,
-    private val gradeRepository: GradeRepository,
-    private val studentRepository: StudentRepository,
     private val semesterRepository: SemesterRepository,
-    private val preferencesRepository: PreferencesRepository,
-    private val schedulers: SchedulersProvider,
+    private val averageProvider: GradeAverageProvider,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<GradeSummaryView>(errorHandler) {
+) : BasePresenter<GradeSummaryView>(errorHandler, studentRepository, schedulers) {
+
+    private lateinit var lastError: Throwable
 
     override fun onAttachView(view: GradeSummaryView) {
         super.onAttachView(view)
         view.initView()
+        errorHandler.showErrorMessage = ::showErrorViewOnError
     }
 
     fun onParentViewLoadData(semesterId: Int, forceRefresh: Boolean) {
         Timber.i("Loading grade summary data started")
         disposable.add(studentRepository.getCurrentStudent()
-            .flatMap { semesterRepository.getSemesters(it).map { semester -> semester to it } }
-            .map { pair -> pair.first.first { it.semesterId == semesterId } to pair.second }
-            .flatMap {
-                gradeSummaryRepository.getGradesSummary(it.first, forceRefresh)
+            .flatMap { semesterRepository.getSemesters(it).map { semesters -> it to semesters } }
+            .flatMap { (student, semesters) ->
+                gradeSummaryRepository.getGradesSummary(semesters.first { it.semesterId == semesterId }, forceRefresh)
+                    .map { it.sortedBy { subject -> subject.subject } }
                     .flatMap { gradesSummary ->
-                        gradeRepository.getGrades(it.second, it.first, forceRefresh)
-                            .map { grades ->
-                                grades.map { item -> item.changeModifier(preferencesRepository.gradePlusModifier, preferencesRepository.gradeMinusModifier) }
-                                    .groupBy { grade -> grade.subject }
-                                    .mapValues { entry -> entry.value.calcAverage() }
-                                    .filterValues { value -> value != 0.0 }
-                                    .let { averages ->
-                                        createGradeSummaryItems(gradesSummary, averages) to
-                                            GradeSummaryScrollableHeader(
-                                                formatAverage(gradesSummary.calcAverage()),
-                                                formatAverage(averages.values.average())
-                                            )
-                                    }
-                            }
+                        averageProvider.getGradeAverage(student, semesters, semesterId, forceRefresh)
+                            .map { averages -> createGradeSummaryItemsAndHeader(gradesSummary, averages) }
                     }
             }
             .subscribeOn(schedulers.backgroundThread)
@@ -66,26 +54,49 @@ class GradeSummaryPresenter @Inject constructor(
                     enableSwipe(true)
                     notifyParentDataLoaded(semesterId)
                 }
-            }.subscribe({
+            }.subscribe({ (gradeSummaryItems, gradeSummaryHeader) ->
                 Timber.i("Loading grade summary result: Success")
                 view?.run {
-                    showEmpty(it.first.isEmpty())
-                    showContent(it.first.isNotEmpty())
-                    updateData(it.first, it.second)
+                    showEmpty(gradeSummaryItems.isEmpty())
+                    showContent(gradeSummaryItems.isNotEmpty())
+                    showErrorView(false)
+                    updateData(gradeSummaryItems, gradeSummaryHeader)
                 }
-                analytics.logEvent("load_grade_summary", "items" to it.first.size, "force_refresh" to forceRefresh)
+                analytics.logEvent("load_grade_summary", "items" to gradeSummaryItems.size, "force_refresh" to forceRefresh)
             }) {
                 Timber.i("Loading grade summary result: An exception occurred")
-                view?.run { showEmpty(isViewEmpty) }
                 errorHandler.dispatch(it)
             })
     }
 
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
+
     fun onSwipeRefresh() {
         Timber.i("Force refreshing the grade summary")
         view?.notifyParentRefresh()
     }
 
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        view?.notifyParentRefresh()
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
     fun onParentViewReselected() {
         view?.run {
             if (!isViewEmpty) resetView()
@@ -104,16 +115,22 @@ class GradeSummaryPresenter @Inject constructor(
         disposable.clear()
     }
 
-    private fun createGradeSummaryItems(gradesSummary: List<GradeSummary>, averages: Map<String, Double>)
-        : List<GradeSummaryItem> {
-        return gradesSummary.filter { !checkEmpty(it, averages) }.map { it ->
-            GradeSummaryItem(
-                title = it.subject,
-                average = formatAverage(averages.getOrElse(it.subject) { 0.0 }, ""),
-                predictedGrade = it.predictedGrade,
-                finalGrade = it.finalGrade
-            )
-        }
+    private fun createGradeSummaryItemsAndHeader(gradesSummary: List<GradeSummary>, averages: Map<String, Double>)
+        : Pair<List<GradeSummaryItem>, GradeSummaryScrollableHeader> {
+        return averages.filterValues { value -> value != 0.0 }
+            .let { filteredAverages ->
+                gradesSummary.filter { !checkEmpty(it, filteredAverages) }
+                    .map {
+                        GradeSummaryItem(
+                            summary = it,
+                            average = formatAverage(filteredAverages.getOrElse(it.subject) { 0.0 }, "")
+                        )
+                    }.let {
+                        it to GradeSummaryScrollableHeader(
+                            formatAverage(gradesSummary.calcAverage()),
+                            formatAverage(filteredAverages.values.average()))
+                    }
+            }
     }
 
     private fun checkEmpty(gradeSummary: GradeSummary, averages: Map<String, Double>): Boolean {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryView.kt
index 5f7c7b168..cf3184873 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryView.kt
@@ -1,8 +1,8 @@
 package io.github.wulkanowy.ui.modules.grade.summary
 
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
 
-interface GradeSummaryView : BaseSessionView {
+interface GradeSummaryView : BaseView {
 
     val isViewEmpty: Boolean
 
@@ -26,6 +26,10 @@ interface GradeSummaryView : BaseSessionView {
 
     fun showContent(show: Boolean)
 
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
     fun showEmpty(show: Boolean)
 
     fun notifyParentDataLoaded(semesterId: Int)
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkFragment.kt
index 7325e3ecd..3f8f1359a 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkFragment.kt
@@ -3,6 +3,8 @@ package io.github.wulkanowy.ui.modules.homework
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
 import android.view.ViewGroup
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.FlexibleItemDecoration
@@ -10,14 +12,15 @@ import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Homework
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_homework.*
 import javax.inject.Inject
 
-class HomeworkFragment : BaseSessionFragment(), HomeworkView, MainView.TitledView {
+class HomeworkFragment : BaseFragment(), HomeworkView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: HomeworkPresenter
@@ -31,8 +34,9 @@ class HomeworkFragment : BaseSessionFragment(), HomeworkView, MainView.TitledVie
         fun newInstance() = HomeworkFragment()
     }
 
-    override val titleStringId: Int
-        get() = R.string.homework_title
+    override val titleStringId get() = R.string.homework_title
+
+    override val isViewEmpty get() = homeworkAdapter.isEmpty
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.fragment_homework, container, false)
@@ -41,25 +45,28 @@ class HomeworkFragment : BaseSessionFragment(), HomeworkView, MainView.TitledVie
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
         messageContainer = homeworkRecycler
-        presenter.onAttachView(this, savedInstanceState?.getLong(HomeworkFragment.SAVED_DATE_KEY))
+        presenter.onAttachView(this, savedInstanceState?.getLong(SAVED_DATE_KEY))
     }
 
     override fun initView() {
-        homeworkAdapter.run {
-            setOnItemClickListener { presenter.onHomeworkItemSelected(it) }
-        }
+        homeworkAdapter.setOnItemClickListener(presenter::onHomeworkItemSelected)
 
-        homeworkRecycler.run {
+        with(homeworkRecycler) {
             layoutManager = SmoothScrollLinearLayoutManager(context)
             adapter = homeworkAdapter
             addItemDecoration(FlexibleItemDecoration(context)
                 .withDefaultDivider()
-                .withDrawDividerOnLastItem(false)
-            )
+                .withDrawDividerOnLastItem(false))
         }
-        homeworkSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+
+        homeworkSwipe.setOnRefreshListener(presenter::onSwipeRefresh)
+        homeworkErrorRetry.setOnClickListener { presenter.onRetry() }
+        homeworkErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+
         homeworkPreviousButton.setOnClickListener { presenter.onPreviousDay() }
         homeworkNextButton.setOnClickListener { presenter.onNextDay() }
+
+        homeworkNavContainer.setElevationCompat(requireContext().dpToPx(8f))
     }
 
     override fun updateData(data: List<HomeworkItem>) {
@@ -74,18 +81,24 @@ class HomeworkFragment : BaseSessionFragment(), HomeworkView, MainView.TitledVie
         homeworkNavDate.text = date
     }
 
-    override fun isViewEmpty() = homeworkAdapter.isEmpty
-
     override fun hideRefresh() {
         homeworkSwipe.isRefreshing = false
     }
 
     override fun showEmpty(show: Boolean) {
-        homeworkEmpty.visibility = if (show) View.VISIBLE else View.GONE
+        homeworkEmpty.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun showErrorView(show: Boolean) {
+        homeworkError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        homeworkErrorMessage.text = message
     }
 
     override fun showProgress(show: Boolean) {
-        homeworkProgress.visibility = if (show) View.VISIBLE else View.GONE
+        homeworkProgress.visibility = if (show) VISIBLE else GONE
     }
 
     override fun enableSwipe(enable: Boolean) {
@@ -93,15 +106,15 @@ class HomeworkFragment : BaseSessionFragment(), HomeworkView, MainView.TitledVie
     }
 
     override fun showContent(show: Boolean) {
-        homeworkRecycler.visibility = if (show) View.VISIBLE else View.GONE
+        homeworkRecycler.visibility = if (show) VISIBLE else GONE
     }
 
     override fun showPreButton(show: Boolean) {
-        homeworkPreviousButton.visibility = if (show) View.VISIBLE else View.INVISIBLE
+        homeworkPreviousButton.visibility = if (show) VISIBLE else View.INVISIBLE
     }
 
     override fun showNextButton(show: Boolean) {
-        homeworkNextButton.visibility = if (show) View.VISIBLE else View.INVISIBLE
+        homeworkNextButton.visibility = if (show) VISIBLE else View.INVISIBLE
     }
 
     override fun showTimetableDialog(homework: Homework) {
@@ -110,7 +123,7 @@ class HomeworkFragment : BaseSessionFragment(), HomeworkView, MainView.TitledVie
 
     override fun onSaveInstanceState(outState: Bundle) {
         super.onSaveInstanceState(outState)
-        outState.putLong(HomeworkFragment.SAVED_DATE_KEY, presenter.currentDate.toEpochDay())
+        outState.putLong(SAVED_DATE_KEY, presenter.currentDate.toEpochDay())
     }
 
     override fun onDestroyView() {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkPresenter.kt
index 739d44947..7e1da314b 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkPresenter.kt
@@ -1,42 +1,49 @@
 package io.github.wulkanowy.ui.modules.homework
 
-import com.google.firebase.analytics.FirebaseAnalytics.Param.START_DATE
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.db.entities.Homework
 import io.github.wulkanowy.data.repositories.homework.HomeworkRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import io.github.wulkanowy.utils.friday
+import io.github.wulkanowy.utils.getLastSchoolDayIfHoliday
 import io.github.wulkanowy.utils.isHolidays
 import io.github.wulkanowy.utils.monday
 import io.github.wulkanowy.utils.nextOrSameSchoolDay
 import io.github.wulkanowy.utils.toFormattedString
 import org.threeten.bp.LocalDate
+import org.threeten.bp.LocalDate.ofEpochDay
 import timber.log.Timber
 import java.util.concurrent.TimeUnit
 import javax.inject.Inject
 
 class HomeworkPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val homeworkRepository: HomeworkRepository,
-    private val studentRepository: StudentRepository,
     private val semesterRepository: SemesterRepository,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<HomeworkView>(errorHandler) {
+) : BasePresenter<HomeworkView>(errorHandler, studentRepository, schedulers) {
+
+    private var baseDate: LocalDate = LocalDate.now().nextOrSameSchoolDay
 
     lateinit var currentDate: LocalDate
         private set
 
+    private lateinit var lastError: Throwable
+
     fun onAttachView(view: HomeworkView, date: Long?) {
         super.onAttachView(view)
-        Timber.i("Homework view is attached")
         view.initView()
-        loadData(LocalDate.ofEpochDay(date ?: LocalDate.now().nextOrSameSchoolDay.toEpochDay()))
+        Timber.i("Homework view was initialized")
+        errorHandler.showErrorMessage = ::showErrorViewOnError
+        loadData(ofEpochDay(date ?: baseDate.toEpochDay()))
+        if (currentDate.isHolidays) setBaseDateOnHolidays()
         reloadView()
     }
 
@@ -55,6 +62,18 @@ class HomeworkPresenter @Inject constructor(
         loadData(currentDate, true)
     }
 
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(currentDate, true)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
     fun onHomeworkItemSelected(item: AbstractFlexibleItem<*>?) {
         if (item is HomeworkItem) {
             Timber.i("Select homework item ${item.homework.id}")
@@ -62,6 +81,20 @@ class HomeworkPresenter @Inject constructor(
         }
     }
 
+    private fun setBaseDateOnHolidays() {
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .subscribe({
+                baseDate = baseDate.getLastSchoolDayIfHoliday(it.schoolYear)
+                currentDate = baseDate
+                reloadNavigation()
+            }) {
+                Timber.i("Loading semester result: An exception occurred")
+            })
+    }
+
     private fun loadData(date: LocalDate, forceRefresh: Boolean = false) {
         Timber.i("Loading homework data started")
         currentDate = date
@@ -87,17 +120,29 @@ class HomeworkPresenter @Inject constructor(
                     view?.apply {
                         updateData(it)
                         showEmpty(it.isEmpty())
+                        showErrorView(false)
                         showContent(it.isNotEmpty())
                     }
-                    analytics.logEvent("load_homework", "items" to it.size, "force_refresh" to forceRefresh, START_DATE to currentDate.toFormattedString("yyyy-MM-dd"))
+                    analytics.logEvent("load_homework", "items" to it.size, "force_refresh" to forceRefresh)
                 }) {
                     Timber.i("Loading homework result: An exception occurred")
-                    view?.run { showEmpty(isViewEmpty()) }
+
                     errorHandler.dispatch(it)
                 })
         }
     }
 
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
+
     private fun createHomeworkItem(items: Map<LocalDate, List<Homework>>): List<HomeworkItem> {
         return items.flatMap {
             HomeworkHeader(it.key).let { header ->
@@ -113,9 +158,16 @@ class HomeworkPresenter @Inject constructor(
             enableSwipe(false)
             showContent(false)
             showEmpty(false)
+            showErrorView(false)
             clearData()
-            showNextButton(!currentDate.plusDays(7).isHolidays)
+            reloadNavigation()
+        }
+    }
+
+    private fun reloadNavigation() {
+        view?.apply {
             showPreButton(!currentDate.minusDays(7).isHolidays)
+            showNextButton(!currentDate.plusDays(7).isHolidays)
             updateNavigationWeek("${currentDate.monday.toFormattedString("dd.MM")} - " +
                 currentDate.friday.toFormattedString("dd.MM"))
         }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkView.kt
index 546d0526f..1d241df46 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkView.kt
@@ -1,9 +1,11 @@
 package io.github.wulkanowy.ui.modules.homework
 
 import io.github.wulkanowy.data.db.entities.Homework
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
 
-interface HomeworkView : BaseSessionView {
+interface HomeworkView : BaseView {
+
+    val isViewEmpty: Boolean
 
     fun initView()
 
@@ -13,12 +15,14 @@ interface HomeworkView : BaseSessionView {
 
     fun updateNavigationWeek(date: String)
 
-    fun isViewEmpty(): Boolean
-
     fun hideRefresh()
 
     fun showEmpty(show: Boolean)
 
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
     fun showProgress(show: Boolean)
 
     fun enableSwipe(enable: Boolean)
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginActivity.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginActivity.kt
index da054bb52..455d1e8ec 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginActivity.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginActivity.kt
@@ -3,10 +3,12 @@ package io.github.wulkanowy.ui.modules.login
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import android.view.MenuItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.ui.base.BaseActivity
 import io.github.wulkanowy.ui.base.BaseFragmentPagerAdapter
+import io.github.wulkanowy.ui.modules.login.advanced.LoginAdvancedFragment
 import io.github.wulkanowy.ui.modules.login.form.LoginFormFragment
 import io.github.wulkanowy.ui.modules.login.studentselect.LoginStudentSelectFragment
 import io.github.wulkanowy.ui.modules.login.symbol.LoginSymbolFragment
@@ -14,52 +16,64 @@ import io.github.wulkanowy.utils.setOnSelectPageListener
 import kotlinx.android.synthetic.main.activity_login.*
 import javax.inject.Inject
 
-class LoginActivity : BaseActivity(), LoginView {
+class LoginActivity : BaseActivity<LoginPresenter>(), LoginView {
 
     @Inject
-    lateinit var presenter: LoginPresenter
+    override lateinit var presenter: LoginPresenter
 
     @Inject
     lateinit var loginAdapter: BaseFragmentPagerAdapter
 
     companion object {
+
         fun getStartIntent(context: Context) = Intent(context, LoginActivity::class.java)
     }
 
-    override val currentViewIndex: Int
-        get() = loginViewpager.currentItem
+    override val currentViewIndex get() = loginViewpager.currentItem
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_login)
+        setSupportActionBar(loginToolbar)
         messageContainer = loginContainer
 
         presenter.onAttachView(this)
     }
 
-    override fun initAdapter() {
-        loginAdapter.apply {
+    override fun initView() {
+        with(requireNotNull(supportActionBar)) {
+            setDisplayHomeAsUpEnabled(true)
+            setDisplayShowTitleEnabled(false)
+        }
+
+        with(loginAdapter) {
             containerId = loginViewpager.id
             addFragments(listOf(
                 LoginFormFragment.newInstance(),
                 LoginSymbolFragment.newInstance(),
-                LoginStudentSelectFragment.newInstance()
+                LoginStudentSelectFragment.newInstance(),
+                LoginAdvancedFragment.newInstance()
             ))
         }
 
-        loginViewpager.run {
+        with(loginViewpager) {
             offscreenPageLimit = 2
             adapter = loginAdapter
-            setOnSelectPageListener { presenter.onViewSelected(it) }
+            setOnSelectPageListener(presenter::onViewSelected)
         }
     }
 
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        if (item.itemId == android.R.id.home) onBackPressed()
+        return true
+    }
+
     override fun switchView(index: Int) {
         loginViewpager.setCurrentItem(index, false)
     }
 
     override fun showActionBar(show: Boolean) {
-        supportActionBar?.apply { if (show) show() else hide() }
+        supportActionBar?.run { if (show) show() else hide() }
     }
 
     override fun onBackPressed() {
@@ -82,8 +96,7 @@ class LoginActivity : BaseActivity(), LoginView {
         presenter.onSymbolViewAccountLogged(students)
     }
 
-    public override fun onDestroy() {
-        presenter.onDetachView()
-        super.onDestroy()
+    fun onAdvancedLoginClick() {
+        presenter.onAdvancedLoginClick()
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginErrorHandler.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginErrorHandler.kt
index a70ff2d65..75a0ba6a6 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginErrorHandler.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginErrorHandler.kt
@@ -4,7 +4,11 @@ import android.content.res.Resources
 import android.database.sqlite.SQLiteConstraintException
 import com.readystatesoftware.chuck.api.ChuckCollector
 import io.github.wulkanowy.R
-import io.github.wulkanowy.api.login.BadCredentialsException
+import io.github.wulkanowy.sdk.exception.BadCredentialsException
+import io.github.wulkanowy.sdk.mobile.exception.InvalidPinException
+import io.github.wulkanowy.sdk.mobile.exception.InvalidSymbolException
+import io.github.wulkanowy.sdk.mobile.exception.InvalidTokenException
+import io.github.wulkanowy.sdk.mobile.exception.TokenDeadException
 import io.github.wulkanowy.ui.base.ErrorHandler
 import javax.inject.Inject
 
@@ -15,12 +19,22 @@ class LoginErrorHandler @Inject constructor(
 
     var onBadCredentials: () -> Unit = {}
 
+    var onInvalidToken: (String) -> Unit = {}
+
+    var onInvalidPin: (String) -> Unit = {}
+
+    var onInvalidSymbol: (String) -> Unit = {}
+
     var onStudentDuplicate: (String) -> Unit = {}
 
     override fun proceed(error: Throwable) {
         when (error) {
             is BadCredentialsException -> onBadCredentials()
             is SQLiteConstraintException -> onStudentDuplicate(resources.getString(R.string.login_duplicate_student))
+            is TokenDeadException -> onInvalidToken(resources.getString(R.string.login_expired_token))
+            is InvalidTokenException -> onInvalidToken(resources.getString(R.string.login_invalid_token))
+            is InvalidPinException -> onInvalidPin(resources.getString(R.string.login_invalid_pin))
+            is InvalidSymbolException -> onInvalidSymbol(resources.getString(R.string.login_invalid_symbol))
             else -> super.proceed(error)
         }
     }
@@ -28,5 +42,6 @@ class LoginErrorHandler @Inject constructor(
     override fun clear() {
         super.clear()
         onBadCredentials = {}
+        onStudentDuplicate = {}
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginModule.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginModule.kt
index 7c3e7bace..28339a467 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginModule.kt
@@ -6,17 +6,18 @@ import dagger.android.ContributesAndroidInjector
 import io.github.wulkanowy.di.scopes.PerActivity
 import io.github.wulkanowy.di.scopes.PerFragment
 import io.github.wulkanowy.ui.base.BaseFragmentPagerAdapter
+import io.github.wulkanowy.ui.modules.login.advanced.LoginAdvancedFragment
 import io.github.wulkanowy.ui.modules.login.form.LoginFormFragment
 import io.github.wulkanowy.ui.modules.login.studentselect.LoginStudentSelectFragment
 import io.github.wulkanowy.ui.modules.login.symbol.LoginSymbolFragment
 
-@Module
+@Suppress("unused")
+@Module(includes = [LoginModule.Static::class])
 internal abstract class LoginModule {
 
     @Module
-    companion object {
+    object Static {
 
-        @JvmStatic
         @PerActivity
         @Provides
         fun provideLoginAdapter(activity: LoginActivity) = BaseFragmentPagerAdapter(activity.supportFragmentManager)
@@ -26,6 +27,10 @@ internal abstract class LoginModule {
     @ContributesAndroidInjector
     abstract fun bindLoginFormFragment(): LoginFormFragment
 
+    @PerFragment
+    @ContributesAndroidInjector
+    abstract fun bindLoginAdvancedFragment(): LoginAdvancedFragment
+
     @PerFragment
     @ContributesAndroidInjector
     abstract fun bindLoginSymbolFragment(): LoginSymbolFragment
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginPresenter.kt
index fb025beea..afa2d145d 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginPresenter.kt
@@ -1,20 +1,26 @@
 package io.github.wulkanowy.ui.modules.login
 
 import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.SchedulersProvider
 import timber.log.Timber
 import javax.inject.Inject
 
-class LoginPresenter @Inject constructor(errorHandler: ErrorHandler) : BasePresenter<LoginView>(errorHandler) {
+class LoginPresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository
+) : BasePresenter<LoginView>(errorHandler, studentRepository, schedulers) {
 
     override fun onAttachView(view: LoginView) {
         super.onAttachView(view)
-        view.run {
-            initAdapter()
+        with(view) {
+            initView()
             showActionBar(false)
         }
-        Timber.i("Login view is attached")
+        Timber.i("Login view was initialized")
     }
 
     fun onFormViewAccountLogged(students: List<Student>, loginData: Triple<String, String, String>) {
@@ -39,11 +45,15 @@ class LoginPresenter @Inject constructor(errorHandler: ErrorHandler) : BasePrese
         }
     }
 
+    fun onAdvancedLoginClick() {
+        view?.switchView(3)
+    }
+
     fun onViewSelected(index: Int) {
         view?.apply {
             when (index) {
-                0, 1 -> showActionBar(false)
-                2 -> showActionBar(true)
+                0 -> showActionBar(false)
+                1, 2 -> showActionBar(true)
             }
         }
     }
@@ -52,7 +62,7 @@ class LoginPresenter @Inject constructor(errorHandler: ErrorHandler) : BasePrese
         Timber.i("Back pressed in login view")
         view?.apply {
             when (currentViewIndex) {
-                1, 2 -> switchView(0)
+                1, 2, 3 -> switchView(0)
                 else -> default()
             }
         }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginView.kt
index 58d356bbd..9c98a1d8d 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginView.kt
@@ -7,7 +7,7 @@ interface LoginView : BaseView {
 
     val currentViewIndex: Int
 
-    fun initAdapter()
+    fun initView()
 
     fun switchView(index: Int)
 
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/advanced/LoginAdvancedFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/advanced/LoginAdvancedFragment.kt
new file mode 100644
index 000000000..353effa9b
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/advanced/LoginAdvancedFragment.kt
@@ -0,0 +1,259 @@
+package io.github.wulkanowy.ui.modules.login.advanced
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.view.inputmethod.EditorInfo
+import android.widget.ArrayAdapter
+import androidx.appcompat.widget.AppCompatEditText
+import androidx.core.widget.doOnTextChanged
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.sdk.Sdk
+import io.github.wulkanowy.ui.base.BaseFragment
+import io.github.wulkanowy.ui.modules.login.LoginActivity
+import io.github.wulkanowy.ui.modules.login.form.LoginSymbolAdapter
+import io.github.wulkanowy.utils.hideSoftInput
+import io.github.wulkanowy.utils.showSoftInput
+import kotlinx.android.synthetic.main.fragment_login_advanced.*
+import javax.inject.Inject
+
+class LoginAdvancedFragment : BaseFragment(), LoginAdvancedView {
+
+    @Inject
+    lateinit var presenter: LoginAdvancedPresenter
+
+    companion object {
+        fun newInstance() = LoginAdvancedFragment()
+    }
+
+    override val formLoginType: String
+        get() = when (loginTypeSwitch.checkedRadioButtonId) {
+            R.id.loginTypeApi -> "API"
+            R.id.loginTypeScrapper -> "SCRAPPER"
+            else -> "HYBRID"
+        }
+
+    override val formNameValue: String
+        get() = loginFormName.text.toString().trim()
+
+    override val formPassValue: String
+        get() = loginFormPass.text.toString().trim()
+
+    private lateinit var hostKeys: Array<String>
+
+    private lateinit var hostValues: Array<String>
+
+    override val formHostValue: String?
+        get() = hostValues.getOrNull(hostKeys.indexOf(loginFormHost.text.toString()))
+
+    override val formPinValue: String
+        get() = loginFormPin.text.toString().trim()
+
+    override val formSymbolValue: String
+        get() = loginFormSymbol.text.toString().trim()
+
+    override val formTokenValue: String
+        get() = loginFormToken.text.toString().trim()
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.fragment_login_advanced, container, false)
+    }
+
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        presenter.onAttachView(this)
+    }
+
+    override fun initView() {
+        hostKeys = resources.getStringArray(R.array.hosts_keys)
+        hostValues = resources.getStringArray(R.array.hosts_values)
+
+        loginFormName.doOnTextChanged { _, _, _, _ -> presenter.onNameTextChanged() }
+        loginFormPass.doOnTextChanged { _, _, _, _ -> presenter.onPassTextChanged() }
+        loginFormPin.doOnTextChanged { _, _, _, _ -> presenter.onPinTextChanged() }
+        loginFormSymbol.doOnTextChanged { _, _, _, _ -> presenter.onSymbolTextChanged() }
+        loginFormToken.doOnTextChanged { _, _, _, _ -> presenter.onTokenTextChanged() }
+        loginFormHost.setOnItemClickListener { _, _, _, _ -> presenter.onHostSelected() }
+        loginFormSignIn.setOnClickListener { presenter.onSignInClick() }
+
+        loginTypeSwitch.setOnCheckedChangeListener { _, checkedId ->
+            presenter.onLoginModeSelected(when (checkedId) {
+                R.id.loginTypeApi -> Sdk.Mode.API
+                R.id.loginTypeScrapper -> Sdk.Mode.SCRAPPER
+                else -> Sdk.Mode.HYBRID
+            })
+        }
+
+        loginFormPin.setOnEditorDoneSignIn()
+        loginFormPass.setOnEditorDoneSignIn()
+
+        loginFormSymbol.setAdapter(ArrayAdapter(requireContext(), android.R.layout.simple_list_item_1, resources.getStringArray(R.array.symbols_values)))
+
+        with(loginFormHost) {
+            setText(hostKeys.getOrElse(0) { "" })
+            setAdapter(LoginSymbolAdapter(context, R.layout.support_simple_spinner_dropdown_item, hostKeys))
+        }
+    }
+
+    private fun AppCompatEditText.setOnEditorDoneSignIn() {
+        setOnEditorActionListener { _, id, _ ->
+            if (id == EditorInfo.IME_ACTION_DONE || id == EditorInfo.IME_NULL) loginFormSignIn.callOnClick() else false
+        }
+    }
+
+    override fun setDefaultCredentials(name: String, pass: String, symbol: String, token: String, pin: String) {
+        loginFormName.setText(name)
+        loginFormPass.setText(pass)
+        loginFormToken.setText(token)
+        loginFormSymbol.setText(symbol)
+        loginFormPin.setText(pin)
+    }
+
+    override fun setErrorNameRequired() {
+        with(loginFormNameLayout) {
+            requestFocus()
+            error = getString(R.string.login_field_required)
+        }
+    }
+
+    override fun setErrorPassRequired(focus: Boolean) {
+        with(loginFormPassLayout) {
+            if (focus) requestFocus()
+            error = getString(R.string.login_field_required)
+        }
+    }
+
+    override fun setErrorPassInvalid(focus: Boolean) {
+        with(loginFormPassLayout) {
+            if (focus) requestFocus()
+            error = getString(R.string.login_invalid_password)
+        }
+    }
+
+    override fun setErrorPassIncorrect() {
+        with(loginFormPassLayout) {
+            requestFocus()
+            error = getString(R.string.login_incorrect_password)
+        }
+    }
+
+    override fun setErrorPinRequired() {
+        with(loginFormPinLayout) {
+            requestFocus()
+            error = getString(R.string.login_field_required)
+        }
+    }
+
+    override fun setErrorPinInvalid(message: String) {
+        with(loginFormPinLayout) {
+            requestFocus()
+            error = message
+        }
+    }
+
+    override fun setErrorSymbolRequired() {
+        with(loginFormSymbolLayout) {
+            requestFocus()
+            error = getString(R.string.login_field_required)
+        }
+    }
+
+    override fun setErrorSymbolInvalid(message: String) {
+        with(loginFormSymbolLayout) {
+            requestFocus()
+            error = message
+        }
+    }
+
+    override fun setErrorTokenRequired() {
+        with(loginFormTokenLayout) {
+            requestFocus()
+            error = getString(R.string.login_field_required)
+        }
+    }
+
+    override fun setErrorTokenInvalid(message: String) {
+        with(loginFormTokenLayout) {
+            requestFocus()
+            error = message
+        }
+    }
+
+    override fun clearNameError() {
+        loginFormNameLayout.error = null
+    }
+
+    override fun clearPassError() {
+        loginFormPassLayout.error = null
+    }
+
+    override fun clearPinKeyError() {
+        loginFormPinLayout.error = null
+    }
+
+    override fun clearSymbolError() {
+        loginFormSymbolLayout.error = null
+    }
+
+    override fun clearTokenError() {
+        loginFormTokenLayout.error = null
+    }
+
+    override fun showOnlyHybridModeInputs() {
+        loginFormNameLayout.visibility = View.VISIBLE
+        loginFormPassLayout.visibility = View.VISIBLE
+        loginFormHostLayout.visibility = View.VISIBLE
+        loginFormPinLayout.visibility = View.GONE
+        loginFormSymbolLayout.visibility = View.VISIBLE
+        loginFormTokenLayout.visibility = View.GONE
+    }
+
+    override fun showOnlyScrapperModeInputs() {
+        loginFormNameLayout.visibility = View.VISIBLE
+        loginFormPassLayout.visibility = View.VISIBLE
+        loginFormHostLayout.visibility = View.VISIBLE
+        loginFormPinLayout.visibility = View.GONE
+        loginFormSymbolLayout.visibility = View.VISIBLE
+        loginFormTokenLayout.visibility = View.GONE
+    }
+
+    override fun showOnlyMobileApiModeInputs() {
+        loginFormNameLayout.visibility = View.GONE
+        loginFormPassLayout.visibility = View.GONE
+        loginFormHostLayout.visibility = View.GONE
+        loginFormPinLayout.visibility = View.VISIBLE
+        loginFormSymbolLayout.visibility = View.VISIBLE
+        loginFormTokenLayout.visibility = View.VISIBLE
+    }
+
+    override fun showSoftKeyboard() {
+        activity?.showSoftInput()
+    }
+
+    override fun hideSoftKeyboard() {
+        activity?.hideSoftInput()
+    }
+
+    override fun showProgress(show: Boolean) {
+        loginFormProgress.visibility = if (show) View.VISIBLE else View.GONE
+    }
+
+    override fun showContent(show: Boolean) {
+        loginFormContainer.visibility = if (show) View.VISIBLE else View.GONE
+    }
+
+    override fun notifyParentAccountLogged(students: List<Student>) {
+        (activity as? LoginActivity)?.onFormFragmentAccountLogged(students, Triple(
+            loginFormName.text.toString(),
+            loginFormPass.text.toString(),
+            resources.getStringArray(R.array.hosts_values)[1]
+        ))
+    }
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        presenter.onDetachView()
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/advanced/LoginAdvancedPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/advanced/LoginAdvancedPresenter.kt
new file mode 100644
index 000000000..1e49e5d8b
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/advanced/LoginAdvancedPresenter.kt
@@ -0,0 +1,218 @@
+package io.github.wulkanowy.ui.modules.login.advanced
+
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.sdk.Sdk
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.modules.login.LoginErrorHandler
+import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
+import io.github.wulkanowy.utils.ifNullOrBlank
+import io.reactivex.Single
+import timber.log.Timber
+import javax.inject.Inject
+
+class LoginAdvancedPresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    studentRepository: StudentRepository,
+    private val loginErrorHandler: LoginErrorHandler,
+    private val analytics: FirebaseAnalyticsHelper
+) : BasePresenter<LoginAdvancedView>(loginErrorHandler, studentRepository, schedulers) {
+
+    override fun onAttachView(view: LoginAdvancedView) {
+        super.onAttachView(view)
+        view.run {
+            initView()
+            showOnlyScrapperModeInputs()
+            with(loginErrorHandler) {
+                onBadCredentials = ::onBadCredentials
+                onInvalidToken = ::onInvalidToken
+                onInvalidSymbol = ::onInvalidSymbol
+                onInvalidPin = ::onInvalidPin
+            }
+        }
+    }
+
+    private fun onBadCredentials() {
+        view?.run {
+            setErrorPassIncorrect()
+            showSoftKeyboard()
+            Timber.i("Entered wrong username or password")
+        }
+    }
+
+    private fun onInvalidToken(message: String) {
+        view?.run {
+            setErrorTokenInvalid(message)
+            showSoftKeyboard()
+            Timber.i("Entered invalid token")
+        }
+    }
+
+    private fun onInvalidSymbol(message: String) {
+        view?.run {
+            setErrorSymbolInvalid(message)
+            showSoftKeyboard()
+            Timber.i("Entered invalid symbol")
+        }
+    }
+
+    private fun onInvalidPin(message: String) {
+        view?.run {
+            setErrorPinInvalid(message)
+            showSoftKeyboard()
+            Timber.i("Entered invalid PIN")
+        }
+    }
+
+    fun onHostSelected() {
+        view?.apply {
+            clearPassError()
+            clearNameError()
+            if (formHostValue?.contains("fakelog") == true) {
+                setDefaultCredentials("jan@fakelog.cf", "jan123", "powiatwulkanowy", "FK100000", "999999")
+            }
+        }
+    }
+
+    fun onLoginModeSelected(type: Sdk.Mode) {
+        view?.run {
+            when (type) {
+                Sdk.Mode.API -> showOnlyMobileApiModeInputs()
+                Sdk.Mode.SCRAPPER -> showOnlyScrapperModeInputs()
+                Sdk.Mode.HYBRID -> showOnlyHybridModeInputs()
+            }
+        }
+    }
+
+    fun onPassTextChanged() {
+        view?.clearPassError()
+    }
+
+    fun onNameTextChanged() {
+        view?.clearNameError()
+    }
+
+    fun onPinTextChanged() {
+        view?.clearPinKeyError()
+    }
+
+    fun onSymbolTextChanged() {
+        view?.clearSymbolError()
+    }
+
+    fun onTokenTextChanged() {
+        view?.clearTokenError()
+    }
+
+    fun onSignInClick() {
+        if (!validateCredentials()) return
+
+        disposable.add(getStudentsAppropriatesToLoginType()
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doOnSubscribe {
+                view?.apply {
+                    hideSoftKeyboard()
+                    showProgress(true)
+                    showContent(false)
+                }
+                Timber.i("Login started")
+            }
+            .doFinally {
+                view?.apply {
+                    showProgress(false)
+                    showContent(true)
+                }
+            }
+            .subscribe({
+                Timber.i("Login result: Success")
+                analytics.logEvent("registration_form", "success" to true, "students" to it.size, "error" to "No error")
+                view?.notifyParentAccountLogged(it)
+            }, {
+                Timber.i("Login result: An exception occurred")
+                analytics.logEvent("registration_form", "success" to false, "students" to -1, "error" to it.message.ifNullOrBlank { "No message" })
+                loginErrorHandler.dispatch(it)
+            }))
+    }
+
+    private fun getStudentsAppropriatesToLoginType(): Single<List<Student>> {
+        val email = view?.formNameValue.orEmpty()
+        val password = view?.formPassValue.orEmpty()
+        val endpoint = view?.formHostValue.orEmpty()
+
+        val pin = view?.formPinValue.orEmpty()
+        val symbol = view?.formSymbolValue.orEmpty()
+        val token = view?.formTokenValue.orEmpty()
+
+        return when (Sdk.Mode.valueOf(view?.formLoginType ?: "")) {
+            Sdk.Mode.API -> studentRepository.getStudentsApi(pin, symbol, token)
+            Sdk.Mode.SCRAPPER -> studentRepository.getStudentsScrapper(email, password, endpoint, symbol)
+            Sdk.Mode.HYBRID -> studentRepository.getStudentsHybrid(email, password, endpoint, symbol)
+        }
+    }
+
+    private fun validateCredentials(): Boolean {
+        val login = view?.formNameValue.orEmpty()
+        val password = view?.formPassValue.orEmpty()
+
+        val pin = view?.formPinValue.orEmpty()
+        val symbol = view?.formSymbolValue.orEmpty()
+        val token = view?.formTokenValue.orEmpty()
+
+        var isCorrect = true
+
+        when (Sdk.Mode.valueOf(view?.formLoginType ?: "")) {
+            Sdk.Mode.API -> {
+                if (pin.isEmpty()) {
+                    view?.setErrorPinRequired()
+                    isCorrect = false
+                }
+
+                if (symbol.isEmpty()) {
+                    view?.setErrorSymbolRequired()
+                    isCorrect = false
+                }
+
+                if (token.isEmpty()) {
+                    view?.setErrorTokenRequired()
+                    isCorrect = false
+                }
+            }
+            Sdk.Mode.SCRAPPER -> {
+                if (login.isEmpty()) {
+                    view?.setErrorNameRequired()
+                    isCorrect = false
+                }
+
+                if (password.isEmpty()) {
+                    view?.setErrorPassRequired(focus = isCorrect)
+                    isCorrect = false
+                }
+
+                if (password.length < 6 && password.isNotEmpty()) {
+                    view?.setErrorPassInvalid(focus = isCorrect)
+                    isCorrect = false
+                }
+            }
+            Sdk.Mode.HYBRID -> {
+                if (login.isEmpty()) {
+                    view?.setErrorNameRequired()
+                    isCorrect = false
+                }
+
+                if (password.isEmpty()) {
+                    view?.setErrorPassRequired(focus = isCorrect)
+                    isCorrect = false
+                }
+
+                if (password.length < 6 && password.isNotEmpty()) {
+                    view?.setErrorPassInvalid(focus = isCorrect)
+                    isCorrect = false
+                }
+            }
+        }
+
+        return isCorrect
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/advanced/LoginAdvancedView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/advanced/LoginAdvancedView.kt
new file mode 100644
index 000000000..85a85a331
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/advanced/LoginAdvancedView.kt
@@ -0,0 +1,71 @@
+package io.github.wulkanowy.ui.modules.login.advanced
+
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.ui.base.BaseView
+
+interface LoginAdvancedView : BaseView {
+
+    val formNameValue: String
+
+    val formPassValue: String
+
+    val formHostValue: String?
+
+    val formLoginType: String
+
+    val formPinValue: String
+
+    val formSymbolValue: String
+
+    val formTokenValue: String
+
+    fun initView()
+
+    fun setDefaultCredentials(name: String, pass: String, symbol: String, token: String, pin: String)
+
+    fun setErrorNameRequired()
+
+    fun setErrorPassRequired(focus: Boolean)
+
+    fun setErrorPassInvalid(focus: Boolean)
+
+    fun setErrorPassIncorrect()
+
+    fun clearNameError()
+
+    fun clearPassError()
+
+    fun clearPinKeyError()
+
+    fun clearSymbolError()
+
+    fun clearTokenError()
+
+    fun showSoftKeyboard()
+
+    fun hideSoftKeyboard()
+
+    fun showProgress(show: Boolean)
+
+    fun showContent(show: Boolean)
+
+    fun notifyParentAccountLogged(students: List<Student>)
+
+    fun setErrorPinRequired()
+
+    fun setErrorPinInvalid(message: String)
+
+    fun setErrorSymbolRequired()
+
+    fun setErrorSymbolInvalid(message: String)
+
+    fun setErrorTokenRequired()
+
+    fun setErrorTokenInvalid(message: String)
+
+    fun showOnlyHybridModeInputs()
+
+    fun showOnlyScrapperModeInputs()
+
+    fun showOnlyMobileApiModeInputs()
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormFragment.kt
index 54fd0704b..cbd405c28 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormFragment.kt
@@ -9,15 +9,15 @@ import android.view.View.VISIBLE
 import android.view.ViewGroup
 import android.view.inputmethod.EditorInfo.IME_ACTION_DONE
 import android.view.inputmethod.EditorInfo.IME_NULL
-import android.widget.ArrayAdapter
-import io.github.wulkanowy.BuildConfig.VERSION_NAME
+import androidx.core.widget.doOnTextChanged
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.login.LoginActivity
+import io.github.wulkanowy.utils.AppInfo
 import io.github.wulkanowy.utils.hideSoftInput
-import io.github.wulkanowy.utils.setOnItemSelectedListener
-import io.github.wulkanowy.utils.setOnTextChangedListener
+import io.github.wulkanowy.utils.openEmailClient
+import io.github.wulkanowy.utils.openInternetBrowser
 import io.github.wulkanowy.utils.showSoftInput
 import kotlinx.android.synthetic.main.fragment_login_form.*
 import javax.inject.Inject
@@ -27,18 +27,22 @@ class LoginFormFragment : BaseFragment(), LoginFormView {
     @Inject
     lateinit var presenter: LoginFormPresenter
 
+    @Inject
+    lateinit var appInfo: AppInfo
+
     companion object {
         fun newInstance() = LoginFormFragment()
     }
 
-    override val formNameValue: String
-        get() = loginFormName.text.toString()
+    override val formNameValue get() = loginFormName.text.toString()
 
-    override val formPassValue: String
-        get() = loginFormPass.text.toString()
+    override val formPassValue get() = loginFormPass.text.toString()
 
-    override val formHostValue: String?
-        get() = resources.getStringArray(R.array.endpoints_values)[loginFormHost.selectedItemPosition]
+    override val formHostValue get() = hostValues.getOrNull(hostKeys.indexOf(loginFormHost.text.toString()))
+
+    private lateinit var hostKeys: Array<String>
+
+    private lateinit var hostValues: Array<String>
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.fragment_login_form, container, false)
@@ -50,49 +54,56 @@ class LoginFormFragment : BaseFragment(), LoginFormView {
     }
 
     override fun initView() {
-        loginFormName.setOnTextChangedListener { presenter.onNameTextChanged() }
-        loginFormPass.setOnTextChangedListener { presenter.onPassTextChanged() }
-        loginFormHost.setOnItemSelectedListener { presenter.onHostSelected() }
-        loginFormSignIn.setOnClickListener { presenter.attemptLogin() }
+        hostKeys = resources.getStringArray(R.array.hosts_keys)
+        hostValues = resources.getStringArray(R.array.hosts_values)
+
+        loginFormName.doOnTextChanged { _, _, _, _ -> presenter.onNameTextChanged() }
+        loginFormPass.doOnTextChanged { _, _, _, _ -> presenter.onPassTextChanged() }
+        loginFormHost.setOnItemClickListener { _, _, _, _ -> presenter.onHostSelected() }
+        loginFormSignIn.setOnClickListener { presenter.onSignInClick() }
+        loginFormAdvancedButton.setOnClickListener { presenter.onAdvancedLoginClick() }
+        loginFormPrivacyLink.setOnClickListener { presenter.onPrivacyLinkClick() }
+        loginFormFaq.setOnClickListener { presenter.onFaqClick() }
+        loginFormContactEmail.setOnClickListener { presenter.onEmailClick() }
 
         loginFormPass.setOnEditorActionListener { _, id, _ ->
             if (id == IME_ACTION_DONE || id == IME_NULL) loginFormSignIn.callOnClick() else false
         }
 
-        context?.let {
-            loginFormHost.adapter = ArrayAdapter.createFromResource(it, R.array.endpoints_keys, android.R.layout.simple_spinner_item)
-                .apply { setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item) }
+        with(loginFormHost) {
+            setText(hostKeys.getOrElse(0) { "" })
+            setAdapter(LoginSymbolAdapter(context, R.layout.support_simple_spinner_dropdown_item, hostKeys))
         }
     }
 
-    override fun setDefaultCredentials(name: String, pass: String) {
+    override fun setCredentials(name: String, pass: String) {
         loginFormName.setText(name)
         loginFormPass.setText(pass)
     }
 
     override fun setErrorNameRequired() {
-        loginFormNameLayout.run {
+        with(loginFormNameLayout) {
             requestFocus()
             error = getString(R.string.login_field_required)
         }
     }
 
     override fun setErrorPassRequired(focus: Boolean) {
-        loginFormPassLayout.run {
+        with(loginFormPassLayout) {
             if (focus) requestFocus()
             error = getString(R.string.login_field_required)
         }
     }
 
     override fun setErrorPassInvalid(focus: Boolean) {
-        loginFormPassLayout.run {
+        with(loginFormPassLayout) {
             if (focus) requestFocus()
             error = getString(R.string.login_invalid_password)
         }
     }
 
     override fun setErrorPassIncorrect() {
-        loginFormPassLayout.run {
+        with(loginFormPassLayout) {
             requestFocus()
             error = getString(R.string.login_incorrect_password)
         }
@@ -124,22 +135,40 @@ class LoginFormFragment : BaseFragment(), LoginFormView {
 
     @SuppressLint("SetTextI18n")
     override fun showVersion() {
-        loginFormVersion.apply {
-            visibility = VISIBLE
-            text = "${getString(R.string.app_name)} $VERSION_NAME"
-        }
+        loginFormVersion.text = "v${appInfo.versionName}"
     }
 
-    override fun notifyParentAccountLogged(students: List<Student>) {
-        (activity as? LoginActivity)?.onFormFragmentAccountLogged(students, Triple(
-            loginFormName.text.toString(),
-            loginFormPass.text.toString(),
-            resources.getStringArray(R.array.endpoints_values)[loginFormHost.selectedItemPosition]
-        ))
+    override fun notifyParentAccountLogged(students: List<Student>, loginData: Triple<String, String, String>) {
+        (activity as? LoginActivity)?.onFormFragmentAccountLogged(students, loginData)
+    }
+
+    override fun openPrivacyPolicyPage() {
+        context?.openInternetBrowser("https://wulkanowy.github.io/polityka-prywatnosci.html", ::showMessage)
+    }
+
+    override fun showContact(show: Boolean) {
+        loginFormContact.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun openAdvancedLogin() {
+        (activity as? LoginActivity)?.onAdvancedLoginClick()
     }
 
     override fun onDestroyView() {
         super.onDestroyView()
         presenter.onDetachView()
     }
+
+    override fun openFaqPage() {
+        context?.openInternetBrowser("https://wulkanowy.github.io/czesto-zadawane-pytania/dlaczego-nie-moge-sie-zalogowac", ::showMessage)
+    }
+
+    override fun openEmail() {
+        context?.openEmailClient(
+            requireContext().getString(R.string.login_email_intent_title),
+            "wulkanowyinc@gmail.com",
+            requireContext().getString(R.string.login_email_subject),
+            requireContext().getString(R.string.login_email_text, appInfo.systemModel, appInfo.systemVersion.toString(), appInfo.versionName)
+        )
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormPresenter.kt
index a0717649a..0b45c9a53 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormPresenter.kt
@@ -1,29 +1,29 @@
 package io.github.wulkanowy.ui.modules.login.form
 
-import com.google.firebase.analytics.FirebaseAnalytics.Param.SUCCESS
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.modules.login.LoginErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
+import io.github.wulkanowy.utils.ifNullOrBlank
 import timber.log.Timber
 import javax.inject.Inject
-import javax.inject.Named
 
 class LoginFormPresenter @Inject constructor(
-    private val schedulers: SchedulersProvider,
-    private val errorHandler: LoginErrorHandler,
-    private val studentRepository: StudentRepository,
-    private val analytics: FirebaseAnalyticsHelper,
-    @param:Named("isDebug") private val isDebug: Boolean
-) : BasePresenter<LoginFormView>(errorHandler) {
+    schedulers: SchedulersProvider,
+    studentRepository: StudentRepository,
+    private val loginErrorHandler: LoginErrorHandler,
+    private val analytics: FirebaseAnalyticsHelper
+) : BasePresenter<LoginFormView>(loginErrorHandler, studentRepository, schedulers) {
 
     override fun onAttachView(view: LoginFormView) {
         super.onAttachView(view)
         view.run {
             initView()
-            if (isDebug) showVersion()
-            errorHandler.onBadCredentials = {
+            showContact(false)
+            showVersion()
+
+            loginErrorHandler.onBadCredentials = {
                 setErrorPassIncorrect()
                 showSoftKeyboard()
                 Timber.i("Entered wrong username or password")
@@ -31,11 +31,21 @@ class LoginFormPresenter @Inject constructor(
         }
     }
 
+    fun onPrivacyLinkClick() {
+        view?.openPrivacyPolicyPage()
+    }
+
+    fun onAdvancedLoginClick() {
+        view?.openAdvancedLogin()
+    }
+
     fun onHostSelected() {
         view?.apply {
             clearPassError()
             clearNameError()
-            if (formHostValue?.contains("fakelog") == true) setDefaultCredentials("jan@fakelog.cf", "jan123")
+            if (formHostValue?.contains("fakelog") == true) {
+                setCredentials("jan@fakelog.cf", "jan123")
+            }
         }
     }
 
@@ -47,14 +57,14 @@ class LoginFormPresenter @Inject constructor(
         view?.clearNameError()
     }
 
-    fun attemptLogin() {
-        val email = view?.formNameValue.orEmpty()
-        val password = view?.formPassValue.orEmpty()
-        val endpoint = view?.formHostValue.orEmpty()
+    fun onSignInClick() {
+        val email = view?.formNameValue.orEmpty().trim()
+        val password = view?.formPassValue.orEmpty().trim()
+        val endpoint = view?.formHostValue.orEmpty().trim()
 
         if (!validateCredentials(email, password)) return
 
-        disposable.add(studentRepository.getStudents(email, password, endpoint)
+        disposable.add(studentRepository.getStudentsScrapper(email, password, endpoint)
             .subscribeOn(schedulers.backgroundThread)
             .observeOn(schedulers.mainThread)
             .doOnSubscribe {
@@ -73,15 +83,24 @@ class LoginFormPresenter @Inject constructor(
             }
             .subscribe({
                 Timber.i("Login result: Success")
-                analytics.logEvent("registration_form", SUCCESS to true, "students" to it.size, "endpoint" to endpoint, "error" to "No error")
-                view?.notifyParentAccountLogged(it)
+                analytics.logEvent("registration_form", "success" to true, "students" to it.size, "scrapperBaseUrl" to endpoint, "error" to "No error")
+                view?.notifyParentAccountLogged(it, Triple(email, password, endpoint))
             }, {
                 Timber.i("Login result: An exception occurred")
-                analytics.logEvent("registration_form", SUCCESS to false, "students" to -1, "endpoint" to endpoint, "error" to it.localizedMessage)
-                errorHandler.dispatch(it)
+                analytics.logEvent("registration_form", "success" to false, "students" to -1, "scrapperBaseUrl" to endpoint, "error" to it.message.ifNullOrBlank { "No message" })
+                loginErrorHandler.dispatch(it)
+                view?.showContact(true)
             }))
     }
 
+    fun onFaqClick() {
+        view?.openFaqPage()
+    }
+
+    fun onEmailClick() {
+        view?.openEmail()
+    }
+
     private fun validateCredentials(login: String, password: String): Boolean {
         var isCorrect = true
 
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormView.kt
index 69672780d..6da57c8c5 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormView.kt
@@ -13,7 +13,7 @@ interface LoginFormView : BaseView {
 
     val formHostValue: String?
 
-    fun setDefaultCredentials(name: String, pass: String)
+    fun setCredentials(name: String, pass: String)
 
     fun setErrorNameRequired()
 
@@ -37,5 +37,15 @@ interface LoginFormView : BaseView {
 
     fun showVersion()
 
-    fun notifyParentAccountLogged(students: List<Student>)
+    fun notifyParentAccountLogged(students: List<Student>, loginData: Triple<String, String, String>)
+
+    fun openPrivacyPolicyPage()
+
+    fun showContact(show: Boolean)
+
+    fun openFaqPage()
+
+    fun openEmail()
+
+    fun openAdvancedLogin()
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginSymbolAdapter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginSymbolAdapter.kt
new file mode 100644
index 000000000..87fa038ec
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginSymbolAdapter.kt
@@ -0,0 +1,16 @@
+package io.github.wulkanowy.ui.modules.login.form
+
+import android.content.Context
+import android.widget.ArrayAdapter
+import android.widget.Filter
+
+class LoginSymbolAdapter(context: Context, resource: Int, objects: Array<out String>) :
+    ArrayAdapter<String>(context, resource, objects) {
+
+    override fun getFilter() = object : Filter() {
+
+        override fun performFiltering(constraint: CharSequence?) = null
+
+        override fun publishResults(constraint: CharSequence?, results: FilterResults?) {}
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectFragment.kt
index 2bcb6b4e9..8478f7ccf 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectFragment.kt
@@ -1,14 +1,11 @@
 package io.github.wulkanowy.ui.modules.login.studentselect
 
-import android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK
-import android.content.Intent.FLAG_ACTIVITY_NEW_TASK
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.View.GONE
 import android.view.View.VISIBLE
 import android.view.ViewGroup
-import androidx.appcompat.app.AppCompatActivity
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
@@ -16,6 +13,9 @@ import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
+import io.github.wulkanowy.utils.AppInfo
+import io.github.wulkanowy.utils.openEmailClient
+import io.github.wulkanowy.utils.openInternetBrowser
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_login_student_select.*
 import java.io.Serializable
@@ -29,6 +29,9 @@ class LoginStudentSelectFragment : BaseFragment(), LoginStudentSelectView {
     @Inject
     lateinit var loginAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
 
+    @Inject
+    lateinit var appInfo: AppInfo
+
     companion object {
         const val SAVED_STUDENTS = "STUDENTS"
 
@@ -45,7 +48,10 @@ class LoginStudentSelectFragment : BaseFragment(), LoginStudentSelectView {
     }
 
     override fun initView() {
+        loginStudentSelectSignIn.setOnClickListener { presenter.onSignIn() }
         loginAdapter.apply { setOnItemClickListener { presenter.onItemSelected(it) } }
+        loginStudentSelectContactDiscord.setOnClickListener { presenter.onDiscordClick() }
+        loginStudentSelectContactEmail.setOnClickListener { presenter.onEmailClick() }
 
         loginStudentSelectRecycler.apply {
             adapter = loginAdapter
@@ -54,14 +60,11 @@ class LoginStudentSelectFragment : BaseFragment(), LoginStudentSelectView {
     }
 
     override fun updateData(data: List<LoginStudentSelectItem>) {
-        loginAdapter.updateDataSet(data, true)
+        loginAdapter.updateDataSet(data)
     }
 
     override fun openMainView() {
-        activity?.let {
-            startActivity(MainActivity.getStartIntent(it)
-                .apply { addFlags(FLAG_ACTIVITY_CLEAR_TASK or FLAG_ACTIVITY_NEW_TASK) })
-        }
+        activity?.let { startActivity(MainActivity.getStartIntent(context = it, clear = true)) }
     }
 
     override fun showProgress(show: Boolean) {
@@ -69,11 +72,11 @@ class LoginStudentSelectFragment : BaseFragment(), LoginStudentSelectView {
     }
 
     override fun showContent(show: Boolean) {
-        loginStudentSelectRecycler.visibility = if (show) VISIBLE else GONE
+        loginStudentSelectContent.visibility = if (show) VISIBLE else GONE
     }
 
-    override fun showActionBar(show: Boolean) {
-        (activity as? AppCompatActivity)?.supportActionBar?.run { if (show) show() else hide() }
+    override fun enableSignIn(enable: Boolean) {
+        loginStudentSelectSignIn.isEnabled = enable
     }
 
     fun onParentInitStudentSelectFragment(students: List<Student>) {
@@ -85,8 +88,25 @@ class LoginStudentSelectFragment : BaseFragment(), LoginStudentSelectView {
         outState.putSerializable(SAVED_STUDENTS, presenter.students as Serializable)
     }
 
+    override fun showContact(show: Boolean) {
+        loginStudentSelectContact.visibility = if (show) VISIBLE else GONE
+    }
+
     override fun onDestroyView() {
         presenter.onDetachView()
         super.onDestroyView()
     }
+
+    override fun openDiscordInvite() {
+        context?.openInternetBrowser("https://discord.gg/vccAQBr", ::showMessage)
+    }
+
+    override fun openEmail() {
+        context?.openEmailClient(
+            requireContext().getString(R.string.login_email_intent_title),
+            "wulkanowyinc@gmail.com",
+            requireContext().getString(R.string.login_email_subject),
+            requireContext().getString(R.string.login_email_text, appInfo.systemModel, appInfo.systemVersion.toString(), appInfo.versionName)
+        )
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectItem.kt
index 65940a980..fa21cff94 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectItem.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectItem.kt
@@ -13,15 +13,15 @@ import kotlinx.android.synthetic.main.item_login_student_select.*
 
 class LoginStudentSelectItem(val student: Student) : AbstractFlexibleItem<LoginStudentSelectItem.ItemViewHolder>() {
 
-    override fun getLayoutRes(): Int = R.layout.item_login_student_select
+    override fun getLayoutRes() = R.layout.item_login_student_select
 
     override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>): ItemViewHolder {
         return ItemViewHolder(view, adapter)
     }
 
     @SuppressLint("SetTextI18n")
-    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ItemViewHolder, position: Int, payloads: MutableList<Any>?) {
-        holder.run {
+    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ItemViewHolder, position: Int, payloads: MutableList<Any>) {
+        holder.apply {
             loginItemName.text = "${student.studentName} ${student.className}"
             loginItemSchool.text = student.schoolName
         }
@@ -43,7 +43,17 @@ class LoginStudentSelectItem(val student: Student) : AbstractFlexibleItem<LoginS
     }
 
     class ItemViewHolder(view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter), LayoutContainer {
+
         override val containerView: View
             get() = itemView
+
+        init {
+            loginItemCheck.keyListener = null
+        }
+
+        override fun onClick(view: View?) {
+            super.onClick(view)
+            loginItemCheck.apply { isChecked = !isChecked }
+        }
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectPresenter.kt
index 6c2acb3bd..841c225d7 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectPresenter.kt
@@ -1,6 +1,5 @@
 package io.github.wulkanowy.ui.modules.login.studentselect
 
-import com.google.firebase.analytics.FirebaseAnalytics.Param.SUCCESS
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.repositories.student.StudentRepository
@@ -8,25 +7,29 @@ import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.modules.login.LoginErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
-import io.reactivex.Single
+import io.github.wulkanowy.utils.ifNullOrBlank
 import timber.log.Timber
 import java.io.Serializable
 import javax.inject.Inject
 
 class LoginStudentSelectPresenter @Inject constructor(
-    private val errorHandler: LoginErrorHandler,
-    private val studentRepository: StudentRepository,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    studentRepository: StudentRepository,
+    private val loginErrorHandler: LoginErrorHandler,
     private val analytics: FirebaseAnalyticsHelper
-) : BasePresenter<LoginStudentSelectView>(errorHandler) {
+) : BasePresenter<LoginStudentSelectView>(loginErrorHandler, studentRepository, schedulers) {
 
     var students = emptyList<Student>()
 
+    private var selectedStudents = mutableListOf<Student>()
+
     fun onAttachView(view: LoginStudentSelectView, students: Serializable?) {
         super.onAttachView(view)
         view.run {
             initView()
-            errorHandler.onStudentDuplicate = {
+            showContact(false)
+            enableSignIn(false)
+            loginErrorHandler.onStudentDuplicate = {
                 showMessage(it)
                 Timber.i("The student already registered in the app was selected")
             }
@@ -37,13 +40,21 @@ class LoginStudentSelectPresenter @Inject constructor(
         }
     }
 
+    fun onSignIn() {
+        registerStudents(selectedStudents)
+    }
+
     fun onParentInitStudentSelectView(students: List<Student>) {
         loadData(students)
+        if (students.size == 1) registerStudents(students)
     }
 
     fun onItemSelected(item: AbstractFlexibleItem<*>?) {
         if (item is LoginStudentSelectItem) {
-            registerStudent(item.student)
+            selectedStudents.removeAll { it == item.student }
+                .let { if (!it) selectedStudents.add(item.student) }
+
+            view?.enableSignIn(selectedStudents.isNotEmpty())
         }
     }
 
@@ -54,34 +65,40 @@ class LoginStudentSelectPresenter @Inject constructor(
         }
     }
 
-    private fun registerStudent(student: Student) {
-        disposable.add(studentRepository.saveStudent(student)
-            .map { student.apply { id = it } }
-            .onErrorResumeNext { studentRepository.logoutStudent(student).andThen(Single.error(it)) }
-            .flatMapCompletable { studentRepository.switchStudent(student) }
+    private fun registerStudents(students: List<Student>) {
+        disposable.add(studentRepository.saveStudents(students)
+            .map { students.first().apply { id = it.first() } }
+            .flatMapCompletable { studentRepository.switchStudent(it) }
             .subscribeOn(schedulers.backgroundThread)
             .observeOn(schedulers.mainThread)
             .doOnSubscribe {
                 view?.apply {
                     showProgress(true)
                     showContent(false)
-                    showActionBar(false)
                 }
                 Timber.i("Registration started")
             }
             .subscribe({
-                analytics.logEvent("registration_student_select", SUCCESS to true, "endpoint" to student.endpoint, "symbol" to student.symbol, "error" to "No error")
+                students.forEach { analytics.logEvent("registration_student_select", "success" to true, "scrapperBaseUrl" to it.scrapperBaseUrl, "symbol" to it.symbol, "error" to "No error") }
                 Timber.i("Registration result: Success")
                 view?.openMainView()
-            }, {
-                analytics.logEvent("registration_student_select", SUCCESS to false, "endpoint" to student.endpoint, "symbol" to student.symbol, "error" to it.localizedMessage)
+            }, { error ->
+                students.forEach { analytics.logEvent("registration_student_select", "success" to false, "scrapperBaseUrl" to it.scrapperBaseUrl, "symbol" to it.symbol, "error" to error.message.ifNullOrBlank { "No message" }) }
                 Timber.i("Registration result: An exception occurred ")
-                errorHandler.dispatch(it)
+                loginErrorHandler.dispatch(error)
                 view?.apply {
                     showProgress(false)
                     showContent(true)
-                    showActionBar(true)
+                    showContact(true)
                 }
             }))
     }
+
+    fun onDiscordClick() {
+        view?.openDiscordInvite()
+    }
+
+    fun onEmailClick() {
+        view?.openEmail()
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectView.kt
index 824f421fe..238771009 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectView.kt
@@ -14,5 +14,11 @@ interface LoginStudentSelectView : BaseView {
 
     fun showContent(show: Boolean)
 
-    fun showActionBar(show: Boolean)
+    fun enableSignIn(enable: Boolean)
+
+    fun showContact(show: Boolean)
+
+    fun openDiscordInvite()
+
+    fun openEmail()
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolFragment.kt
index 87de0a818..5e9ce3ba3 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolFragment.kt
@@ -9,12 +9,15 @@ import android.view.ViewGroup
 import android.view.inputmethod.EditorInfo.IME_ACTION_DONE
 import android.view.inputmethod.EditorInfo.IME_NULL
 import android.widget.ArrayAdapter
+import androidx.core.widget.doOnTextChanged
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.login.LoginActivity
+import io.github.wulkanowy.utils.AppInfo
 import io.github.wulkanowy.utils.hideSoftInput
-import io.github.wulkanowy.utils.setOnTextChangedListener
+import io.github.wulkanowy.utils.openEmailClient
+import io.github.wulkanowy.utils.openInternetBrowser
 import io.github.wulkanowy.utils.showSoftInput
 import kotlinx.android.synthetic.main.fragment_login_symbol.*
 import javax.inject.Inject
@@ -24,6 +27,9 @@ class LoginSymbolFragment : BaseFragment(), LoginSymbolView {
     @Inject
     lateinit var presenter: LoginSymbolPresenter
 
+    @Inject
+    lateinit var appInfo: AppInfo
+
     companion object {
         private const val SAVED_LOGIN_DATA = "LOGIN_DATA"
 
@@ -44,8 +50,10 @@ class LoginSymbolFragment : BaseFragment(), LoginSymbolView {
 
     override fun initView() {
         loginSymbolSignIn.setOnClickListener { presenter.attemptLogin(loginSymbolName.text.toString()) }
+        loginSymbolFaq.setOnClickListener { presenter.onFaqClick() }
+        loginSymbolContactEmail.setOnClickListener { presenter.onEmailClick() }
 
-        loginSymbolName.setOnTextChangedListener { presenter.onSymbolTextChanged() }
+        loginSymbolName.doOnTextChanged { _, _, _, _ -> presenter.onSymbolTextChanged() }
 
         loginSymbolName.apply {
             setOnEditorActionListener { _, id, _ ->
@@ -109,8 +117,25 @@ class LoginSymbolFragment : BaseFragment(), LoginSymbolView {
         outState.putSerializable(SAVED_LOGIN_DATA, presenter.loginData)
     }
 
+    override fun showContact(show: Boolean) {
+        loginSymbolContact.visibility = if (show) VISIBLE else GONE
+    }
+
     override fun onDestroyView() {
         super.onDestroyView()
         presenter.onDetachView()
     }
+
+    override fun openFaqPage() {
+        context?.openInternetBrowser("https://wulkanowy.github.io/czesto-zadawane-pytania/co-to-jest-symbol", ::showMessage)
+    }
+
+    override fun openEmail() {
+        context?.openEmailClient(
+            requireContext().getString(R.string.login_email_intent_title),
+            "wulkanowyinc@gmail.com",
+            requireContext().getString(R.string.login_email_subject),
+            requireContext().getString(R.string.login_email_text, appInfo.systemModel, appInfo.systemVersion.toString(), appInfo.versionName)
+        )
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolPresenter.kt
index 0adb9e16f..ee6c30c3b 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolPresenter.kt
@@ -1,29 +1,32 @@
 package io.github.wulkanowy.ui.modules.login.symbol
 
-import com.google.firebase.analytics.FirebaseAnalytics.Param.SUCCESS
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.modules.login.LoginErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
+import io.github.wulkanowy.utils.ifNullOrBlank
 import io.reactivex.Single
 import timber.log.Timber
 import java.io.Serializable
 import javax.inject.Inject
 
 class LoginSymbolPresenter @Inject constructor(
-    private val studentRepository: StudentRepository,
-    private val errorHandler: LoginErrorHandler,
-    private val schedulers: SchedulersProvider,
+    studentRepository: StudentRepository,
+    schedulers: SchedulersProvider,
+    private val loginErrorHandler: LoginErrorHandler,
     private val analytics: FirebaseAnalyticsHelper
-) : BasePresenter<LoginSymbolView>(errorHandler) {
+) : BasePresenter<LoginSymbolView>(loginErrorHandler, studentRepository, schedulers) {
 
     var loginData: Triple<String, String, String>? = null
 
     @Suppress("UNCHECKED_CAST")
     fun onAttachView(view: LoginSymbolView, savedLoginData: Serializable?) {
         super.onAttachView(view)
-        view.initView()
+        view.run {
+            initView()
+            showContact(false)
+        }
         if (savedLoginData is Triple<*, *, *>) {
             loginData = savedLoginData as Triple<String, String, String>
         }
@@ -41,7 +44,7 @@ class LoginSymbolPresenter @Inject constructor(
 
         disposable.add(
             Single.fromCallable { if (loginData == null) throw IllegalArgumentException("Login data is null") else loginData }
-                .flatMap { studentRepository.getStudents(it.first, it.second, it.third, symbol) }
+                .flatMap { studentRepository.getStudentsScrapper(it.first, it.second, it.third, symbol) }
                 .subscribeOn(schedulers.backgroundThread)
                 .observeOn(schedulers.mainThread)
                 .doOnSubscribe {
@@ -59,11 +62,12 @@ class LoginSymbolPresenter @Inject constructor(
                     }
                 }
                 .subscribe({
-                    analytics.logEvent("registration_symbol", SUCCESS to true, "students" to it.size, "endpoint" to loginData?.third, "symbol" to symbol, "error" to "No error")
+                    analytics.logEvent("registration_symbol", "success" to true, "students" to it.size, "scrapperBaseUrl" to loginData?.third, "symbol" to symbol, "error" to "No error")
                     view?.apply {
                         if (it.isEmpty()) {
                             Timber.i("Login with symbol result: Empty student list")
                             setErrorSymbolIncorrect()
+                            view?.showContact(true)
                         } else {
                             Timber.i("Login with symbol result: Success")
                             notifyParentAccountLogged(it)
@@ -71,8 +75,9 @@ class LoginSymbolPresenter @Inject constructor(
                     }
                 }, {
                     Timber.i("Login with symbol result: An exception occurred")
-                    analytics.logEvent("registration_symbol", SUCCESS to false, "students" to -1, "endpoint" to loginData?.third, "symbol" to symbol, "error" to it.localizedMessage)
-                    errorHandler.dispatch(it)
+                    analytics.logEvent("registration_symbol", "success" to false, "students" to -1, "scrapperBaseUrl" to loginData?.third, "symbol" to symbol, "error" to it.message.ifNullOrBlank { "No message" })
+                    loginErrorHandler.dispatch(it)
+                    view?.showContact(true)
                 }))
     }
 
@@ -83,4 +88,12 @@ class LoginSymbolPresenter @Inject constructor(
             showSoftKeyboard()
         }
     }
+
+    fun onFaqClick() {
+        view?.openFaqPage()
+    }
+
+    fun onEmailClick() {
+        view?.openEmail()
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolView.kt
index 2e5143ef1..1afc15327 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolView.kt
@@ -26,4 +26,10 @@ interface LoginSymbolView : BaseView {
     fun showContent(show: Boolean)
 
     fun notifyParentAccountLogged(students: List<Student>)
+
+    fun showContact(show: Boolean)
+
+    fun openFaqPage()
+
+    fun openEmail()
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberFragment.kt
index cff6175c0..12bf1a132 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberFragment.kt
@@ -3,15 +3,17 @@ package io.github.wulkanowy.ui.modules.luckynumber
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
 import android.view.ViewGroup
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.LuckyNumber
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainView
 import kotlinx.android.synthetic.main.fragment_lucky_number.*
 import javax.inject.Inject
 
-class LuckyNumberFragment : BaseSessionFragment(), LuckyNumberView, MainView.TitledView {
+class LuckyNumberFragment : BaseFragment(), LuckyNumberView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: LuckyNumberPresenter
@@ -23,17 +25,22 @@ class LuckyNumberFragment : BaseSessionFragment(), LuckyNumberView, MainView.Tit
     override val titleStringId: Int
         get() = R.string.lucky_number_title
 
+    override val isViewEmpty get() = luckyNumberText.text.isBlank()
+
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.fragment_lucky_number, container, false)
     }
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
+        messageContainer = luckyNumberSwipe
         presenter.onAttachView(this)
     }
 
     override fun initView() {
         luckyNumberSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+        luckyNumberErrorRetry.setOnClickListener { presenter.onRetry() }
+        luckyNumberErrorDetails.setOnClickListener { presenter.onDetailsClick() }
     }
 
     override fun updateData(data: LuckyNumber) {
@@ -45,11 +52,19 @@ class LuckyNumberFragment : BaseSessionFragment(), LuckyNumberView, MainView.Tit
     }
 
     override fun showEmpty(show: Boolean) {
-        luckyNumberEmpty.visibility = if (show) View.VISIBLE else View.GONE
+        luckyNumberEmpty.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun showErrorView(show: Boolean) {
+        luckyNumberError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        luckyNumberErrorMessage.text = message
     }
 
     override fun showProgress(show: Boolean) {
-        luckyNumberProgress.visibility = if (show) View.VISIBLE else View.GONE
+        luckyNumberProgress.visibility = if (show) VISIBLE else GONE
     }
 
     override fun enableSwipe(enable: Boolean) {
@@ -57,11 +72,7 @@ class LuckyNumberFragment : BaseSessionFragment(), LuckyNumberView, MainView.Tit
     }
 
     override fun showContent(show: Boolean) {
-        luckyNumberContent.visibility = if (show) View.VISIBLE else View.GONE
-    }
-
-    override fun isViewEmpty(): Boolean {
-        return luckyNumberText.text.isBlank()
+        luckyNumberContent.visibility = if (show) VISIBLE else GONE
     }
 
     override fun onDestroyView() {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberPresenter.kt
index 74ab0d1fe..c86aab976 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberPresenter.kt
@@ -4,29 +4,32 @@ import io.github.wulkanowy.data.repositories.luckynumber.LuckyNumberRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import timber.log.Timber
 import javax.inject.Inject
 
 class LuckyNumberPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val luckyNumberRepository: LuckyNumberRepository,
-    private val studentRepository: StudentRepository,
     private val semesterRepository: SemesterRepository,
     private val analytics: FirebaseAnalyticsHelper
-) : BasePresenter<LuckyNumberView>(errorHandler) {
+) : BasePresenter<LuckyNumberView>(errorHandler, studentRepository, schedulers) {
+
+    private lateinit var lastError: Throwable
 
     override fun onAttachView(view: LuckyNumberView) {
         super.onAttachView(view)
-        Timber.i("Lucky number view is attached")
         view.run {
             initView()
             showContent(false)
             enableSwipe(false)
         }
+        Timber.i("Lucky number view was initialized")
+        errorHandler.showErrorMessage = ::showErrorViewOnError
         loadData()
     }
 
@@ -52,25 +55,49 @@ class LuckyNumberPresenter @Inject constructor(
                         updateData(it)
                         showContent(true)
                         showEmpty(false)
+                        showErrorView(false)
                     }
                     analytics.logEvent("load_lucky_number", "lucky_number" to it.luckyNumber, "force_refresh" to forceRefresh)
                 }, {
                     Timber.i("Loading lucky number result: An exception occurred")
-                    view?.run { showEmpty(isViewEmpty()) }
                     errorHandler.dispatch(it)
                 }, {
                     Timber.i("Loading lucky number result: No lucky number found")
                     view?.run {
                         showContent(false)
                         showEmpty(true)
+                        showErrorView(false)
                     }
                 })
             )
         }
     }
 
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
+
     fun onSwipeRefresh() {
         Timber.i("Force refreshing the lucky number")
         loadData(true)
     }
+
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(true)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberView.kt
index 5c19142c5..a680c83eb 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberView.kt
@@ -1,9 +1,11 @@
 package io.github.wulkanowy.ui.modules.luckynumber
 
 import io.github.wulkanowy.data.db.entities.LuckyNumber
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
 
-interface LuckyNumberView : BaseSessionView {
+interface LuckyNumberView : BaseView {
+
+    val isViewEmpty: Boolean
 
     fun initView()
 
@@ -13,11 +15,13 @@ interface LuckyNumberView : BaseSessionView {
 
     fun showEmpty(show: Boolean)
 
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
     fun showProgress(show: Boolean)
 
     fun enableSwipe(enable: Boolean)
 
     fun showContent(show: Boolean)
-
-    fun isViewEmpty(): Boolean
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigureActivity.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigureActivity.kt
new file mode 100644
index 000000000..e8ce3bcfb
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigureActivity.kt
@@ -0,0 +1,97 @@
+package io.github.wulkanowy.ui.modules.luckynumberwidget
+
+import android.appwidget.AppWidgetManager.ACTION_APPWIDGET_UPDATE
+import android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_ID
+import android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_IDS
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Toast
+import androidx.appcompat.app.AlertDialog
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.base.BaseActivity
+import io.github.wulkanowy.ui.modules.login.LoginActivity
+import io.github.wulkanowy.utils.setOnItemClickListener
+import kotlinx.android.synthetic.main.activity_widget_configure.*
+import javax.inject.Inject
+
+class LuckyNumberWidgetConfigureActivity : BaseActivity<LuckyNumberWidgetConfigurePresenter>(),
+    LuckyNumberWidgetConfigureView {
+
+    @Inject
+    lateinit var configureAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+
+    @Inject
+    override lateinit var presenter: LuckyNumberWidgetConfigurePresenter
+
+    private var dialog: AlertDialog? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setResult(RESULT_CANCELED)
+        setContentView(R.layout.activity_widget_configure)
+
+        intent.extras.let {
+            presenter.onAttachView(this, it?.getInt(EXTRA_APPWIDGET_ID))
+        }
+    }
+
+    override fun initView() {
+        with(widgetConfigureRecycler) {
+            adapter = configureAdapter
+            layoutManager = SmoothScrollLinearLayoutManager(context)
+        }
+
+        configureAdapter.setOnItemClickListener(presenter::onItemSelect)
+    }
+
+    override fun showThemeDialog() {
+        val items = arrayOf(
+            getString(R.string.widget_timetable_theme_light),
+            getString(R.string.widget_timetable_theme_dark)
+        )
+
+       dialog =  AlertDialog.Builder(this, R.style.WulkanowyTheme_WidgetAccountSwitcher)
+            .setTitle(R.string.widget_timetable_theme_title)
+           .setOnDismissListener { presenter.onDismissThemeView() }
+            .setSingleChoiceItems(items, -1) { _, which ->
+                presenter.onThemeSelect(which)
+            }
+            .show()
+    }
+
+    override fun updateData(data: List<LuckyNumberWidgetConfigureItem>) {
+        configureAdapter.updateDataSet(data)
+    }
+
+    override fun updateLuckyNumberWidget(widgetId: Int) {
+        sendBroadcast(Intent(this, LuckyNumberWidgetProvider::class.java)
+            .apply {
+                action = ACTION_APPWIDGET_UPDATE
+                putExtra(EXTRA_APPWIDGET_IDS, intArrayOf(widgetId))
+            })
+    }
+
+    override fun setSuccessResult(widgetId: Int) {
+        setResult(RESULT_OK, Intent().apply { putExtra(EXTRA_APPWIDGET_ID, widgetId) })
+    }
+
+    override fun showError(text: String, error: Throwable) {
+        Toast.makeText(this, text, Toast.LENGTH_LONG).show()
+    }
+
+    override fun finishView() {
+        finish()
+    }
+
+    override fun openLoginView() {
+        startActivity(LoginActivity.getStartIntent(this))
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        dialog?.dismiss()
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigureItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigureItem.kt
new file mode 100644
index 000000000..e260b7fcb
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigureItem.kt
@@ -0,0 +1,60 @@
+package io.github.wulkanowy.ui.modules.luckynumberwidget
+
+import android.annotation.SuppressLint
+import android.view.View
+import androidx.core.graphics.ColorUtils
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import eu.davidea.flexibleadapter.items.IFlexible
+import eu.davidea.viewholders.FlexibleViewHolder
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.ui.modules.timetablewidget.TimetableWidgetConfigureItem
+import io.github.wulkanowy.utils.getThemeAttrColor
+import kotlinx.android.extensions.LayoutContainer
+import kotlinx.android.synthetic.main.item_account.*
+
+class LuckyNumberWidgetConfigureItem(var student: Student, val isCurrent: Boolean) :
+    AbstractFlexibleItem<LuckyNumberWidgetConfigureItem.ViewHolder>() {
+
+    override fun getLayoutRes() = R.layout.item_account
+
+    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) = ViewHolder(view, adapter)
+
+    @SuppressLint("SetTextI18n")
+    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>) {
+        val context = holder.contentView.context
+
+        val colorImage = if (isCurrent) context.getThemeAttrColor(R.attr.colorPrimary)
+        else ColorUtils.setAlphaComponent(context.getThemeAttrColor(R.attr.colorOnSurface), 153)
+
+        with(holder) {
+            accountItemName.text = "${student.studentName} ${student.className}"
+            accountItemSchool.text = student.schoolName
+            accountItemImage.setColorFilter(colorImage)
+        }
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as TimetableWidgetConfigureItem
+
+        if (student != other.student) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = student.hashCode()
+        result = 31 * result + student.id.toInt()
+        return result
+    }
+
+    class ViewHolder(view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter),
+        LayoutContainer {
+
+        override val containerView: View? get() = contentView
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigurePresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigurePresenter.kt
new file mode 100644
index 000000000..6e4716bfa
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigurePresenter.kt
@@ -0,0 +1,82 @@
+package io.github.wulkanowy.ui.modules.luckynumberwidget
+
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.data.db.SharedPrefProvider
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.ui.modules.luckynumberwidget.LuckyNumberWidgetProvider.Companion.getStudentWidgetKey
+import io.github.wulkanowy.ui.modules.luckynumberwidget.LuckyNumberWidgetProvider.Companion.getThemeWidgetKey
+import io.github.wulkanowy.utils.SchedulersProvider
+import javax.inject.Inject
+
+class LuckyNumberWidgetConfigurePresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
+    private val sharedPref: SharedPrefProvider
+) : BasePresenter<LuckyNumberWidgetConfigureView>(errorHandler, studentRepository, schedulers) {
+
+    private var appWidgetId: Int? = null
+
+    private var selectedStudent: Student? = null
+
+    fun onAttachView(view: LuckyNumberWidgetConfigureView, appWidgetId: Int?) {
+        super.onAttachView(view)
+        this.appWidgetId = appWidgetId
+        view.initView()
+        loadData()
+    }
+
+    fun onItemSelect(item: AbstractFlexibleItem<*>) {
+        if (item is LuckyNumberWidgetConfigureItem) {
+            selectedStudent = item.student
+            view?.showThemeDialog()
+        }
+    }
+
+    fun onThemeSelect(index: Int) {
+        appWidgetId?.let {
+            sharedPref.putLong(getThemeWidgetKey(it), index.toLong())
+        }
+        registerStudent(selectedStudent)
+    }
+
+    fun onDismissThemeView(){
+        view?.finishView()
+    }
+
+    private fun loadData() {
+        disposable.add(studentRepository.getSavedStudents(false)
+            .map { it to appWidgetId?.let { id -> sharedPref.getLong(getStudentWidgetKey(id), 0) } }
+            .map { (students, currentStudentId) ->
+                students.map { student -> LuckyNumberWidgetConfigureItem(student, student.id == currentStudentId) }
+            }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .subscribe({
+                when {
+                    it.isEmpty() -> view?.openLoginView()
+                    it.size == 1 -> {
+                        selectedStudent = it.single().student
+                        view?.showThemeDialog()
+                    }
+                    else -> view?.updateData(it)
+                }
+            }, { errorHandler.dispatch(it) }))
+    }
+
+    private fun registerStudent(student: Student?) {
+        requireNotNull(student)
+
+        appWidgetId?.let { id ->
+            sharedPref.putLong(getStudentWidgetKey(id), student.id)
+            view?.run {
+                updateLuckyNumberWidget(id)
+                setSuccessResult(id)
+            }
+        }
+        view?.finishView()
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigureView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigureView.kt
new file mode 100644
index 000000000..fa4c0cc61
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigureView.kt
@@ -0,0 +1,20 @@
+package io.github.wulkanowy.ui.modules.luckynumberwidget
+
+import io.github.wulkanowy.ui.base.BaseView
+
+interface LuckyNumberWidgetConfigureView : BaseView {
+
+    fun initView()
+
+    fun showThemeDialog()
+
+    fun updateData(data: List<LuckyNumberWidgetConfigureItem>)
+
+    fun updateLuckyNumberWidget(widgetId: Int)
+
+    fun setSuccessResult(widgetId: Int)
+
+    fun finishView()
+
+    fun openLoginView()
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetProvider.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetProvider.kt
new file mode 100644
index 000000000..12753b35d
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetProvider.kt
@@ -0,0 +1,192 @@
+package io.github.wulkanowy.ui.modules.luckynumberwidget
+
+import android.annotation.TargetApi
+import android.app.PendingIntent
+import android.app.PendingIntent.FLAG_UPDATE_CURRENT
+import android.appwidget.AppWidgetManager
+import android.appwidget.AppWidgetManager.ACTION_APPWIDGET_DELETED
+import android.appwidget.AppWidgetManager.ACTION_APPWIDGET_OPTIONS_CHANGED
+import android.appwidget.AppWidgetManager.ACTION_APPWIDGET_UPDATE
+import android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_ID
+import android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_IDS
+import android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_OPTIONS
+import android.appwidget.AppWidgetManager.OPTION_APPWIDGET_MAX_HEIGHT
+import android.appwidget.AppWidgetManager.OPTION_APPWIDGET_MAX_WIDTH
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.os.Build
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.widget.RemoteViews
+import dagger.android.AndroidInjection
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.SharedPrefProvider
+import io.github.wulkanowy.data.db.entities.LuckyNumber
+import io.github.wulkanowy.data.exceptions.NoCurrentStudentException
+import io.github.wulkanowy.data.repositories.luckynumber.LuckyNumberRepository
+import io.github.wulkanowy.data.repositories.semester.SemesterRepository
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.ui.modules.main.MainActivity
+import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.utils.SchedulersProvider
+import io.reactivex.Maybe
+import timber.log.Timber
+import javax.inject.Inject
+
+class LuckyNumberWidgetProvider : BroadcastReceiver() {
+
+    @Inject
+    lateinit var studentRepository: StudentRepository
+
+    @Inject
+    lateinit var semesterRepository: SemesterRepository
+
+    @Inject
+    lateinit var luckyNumberRepository: LuckyNumberRepository
+
+    @Inject
+    lateinit var schedulers: SchedulersProvider
+
+    @Inject
+    lateinit var appWidgetManager: AppWidgetManager
+
+    @Inject
+    lateinit var sharedPref: SharedPrefProvider
+
+    companion object {
+
+        fun getStudentWidgetKey(appWidgetId: Int) = "lucky_number_widget_student_$appWidgetId"
+
+        fun getThemeWidgetKey(appWidgetId: Int) = "lucky_number_widget_theme_$appWidgetId"
+    }
+
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
+    override fun onReceive(context: Context, intent: Intent) {
+        AndroidInjection.inject(this, context)
+        when (intent.action) {
+            ACTION_APPWIDGET_UPDATE -> onUpdate(context, intent)
+            ACTION_APPWIDGET_DELETED -> onDelete(intent)
+            ACTION_APPWIDGET_OPTIONS_CHANGED -> onOptionsChange(context, intent)
+        }
+    }
+
+    private fun onUpdate(context: Context, intent: Intent) {
+        intent.getIntArrayExtra(EXTRA_APPWIDGET_IDS)?.forEach { appWidgetId ->
+            val savedTheme = sharedPref.getLong(getThemeWidgetKey(appWidgetId), 0)
+            val layoutId = if (savedTheme == 0L) R.layout.widget_luckynumber else R.layout.widget_luckynumber_dark
+
+            val luckyNumber = getLuckyNumber(sharedPref.getLong(getStudentWidgetKey(appWidgetId), 0), appWidgetId)
+            val appIntent = PendingIntent.getActivity(context, MainView.Section.LUCKY_NUMBER.id,
+                MainActivity.getStartIntent(context, MainView.Section.LUCKY_NUMBER, true), FLAG_UPDATE_CURRENT)
+
+            val remoteView = RemoteViews(context.packageName, layoutId).apply {
+                setTextViewText(R.id.luckyNumberWidgetNumber, luckyNumber?.luckyNumber?.toString() ?: "#")
+                setOnClickPendingIntent(R.id.luckyNumberWidgetContainer, appIntent)
+            }
+
+            setStyles(remoteView, intent)
+            appWidgetManager.updateAppWidget(appWidgetId, remoteView)
+        }
+    }
+
+    private fun onDelete(intent: Intent) {
+        val appWidgetId = intent.getIntExtra(EXTRA_APPWIDGET_ID, 0)
+        if (appWidgetId != 0) sharedPref.delete(getStudentWidgetKey(appWidgetId))
+    }
+
+    private fun getLuckyNumber(studentId: Long, appWidgetId: Int): LuckyNumber? {
+        return try {
+            studentRepository.isStudentSaved()
+                .filter { true }
+                .flatMap { studentRepository.getSavedStudents().toMaybe() }
+                .flatMap { students ->
+                    val student = students.singleOrNull { student -> student.id == studentId }
+                    when {
+                        student != null -> Maybe.just(student)
+                        studentId != 0L -> {
+                            studentRepository.isCurrentStudentSet()
+                                .filter { true }
+                                .flatMap { studentRepository.getCurrentStudent(false).toMaybe() }
+                                .doOnSuccess { sharedPref.putLong(getStudentWidgetKey(appWidgetId), it.id) }
+                        }
+                        else -> Maybe.empty()
+                    }
+                }
+                .flatMap { semesterRepository.getCurrentSemester(it).toMaybe() }
+                .flatMap { luckyNumberRepository.getLuckyNumber(it) }
+                .subscribeOn(schedulers.backgroundThread)
+                .blockingGet()
+        } catch (e: Exception) {
+            if (e.cause !is NoCurrentStudentException) {
+                Timber.e(e, "An error has occurred in lucky number provider")
+            }
+            null
+        }
+    }
+
+    private fun onOptionsChange(context: Context, intent: Intent) {
+        intent.extras?.getInt(EXTRA_APPWIDGET_ID)?.let { appWidgetId ->
+            val savedTheme = sharedPref.getLong(getThemeWidgetKey(appWidgetId), 0)
+            val layoutId = if (savedTheme == 0L) R.layout.widget_luckynumber else R.layout.widget_luckynumber_dark
+
+            val remoteView = RemoteViews(context.packageName, layoutId)
+
+            setStyles(remoteView, intent)
+            appWidgetManager.updateAppWidget(appWidgetId, remoteView)
+        }
+    }
+
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
+    private fun setStyles(views: RemoteViews, intent: Intent) {
+        val options = intent.extras?.getBundle(EXTRA_APPWIDGET_OPTIONS)
+
+        val maxWidth = options?.getInt(OPTION_APPWIDGET_MAX_WIDTH) ?: 150
+        val maxHeight = options?.getInt(OPTION_APPWIDGET_MAX_HEIGHT) ?: 40
+
+        Timber.d("New lucky number widget measurement: %dx%d", maxWidth, maxHeight)
+
+        when {
+            // 1x1
+            maxWidth < 150 && maxHeight < 110 -> {
+                Timber.d("Lucky number widget size: 1x1")
+                with(views) {
+                    setViewVisibility(R.id.luckyNumberWidgetImageTop, GONE)
+                    setViewVisibility(R.id.luckyNumberWidgetImageLeft, GONE)
+                    setViewVisibility(R.id.luckyNumberWidgetTitle, GONE)
+                    setViewVisibility(R.id.luckyNumberWidgetNumber, VISIBLE)
+                }
+            }
+            // 1x2
+            maxWidth < 150 && maxHeight > 110 -> {
+                Timber.d("Lucky number widget size: 1x2")
+                with(views) {
+                    setViewVisibility(R.id.luckyNumberWidgetImageTop, VISIBLE)
+                    setViewVisibility(R.id.luckyNumberWidgetImageLeft, GONE)
+                    setViewVisibility(R.id.luckyNumberWidgetTitle, GONE)
+                    setViewVisibility(R.id.luckyNumberWidgetNumber, VISIBLE)
+                }
+            }
+            // 2x1
+            maxWidth >= 150 && maxHeight <= 110 -> {
+                Timber.d("Lucky number widget size: 2x1")
+                with(views) {
+                    setViewVisibility(R.id.luckyNumberWidgetImageTop, GONE)
+                    setViewVisibility(R.id.luckyNumberWidgetImageLeft, VISIBLE)
+                    setViewVisibility(R.id.luckyNumberWidgetTitle, GONE)
+                    setViewVisibility(R.id.luckyNumberWidgetNumber, VISIBLE)
+                }
+            }
+            // 2x2 and bigger
+            else -> {
+                Timber.d("Lucky number widget size: 2x2 and bigger")
+                with(views) {
+                    setViewVisibility(R.id.luckyNumberWidgetImageTop, GONE)
+                    setViewVisibility(R.id.luckyNumberWidgetImageLeft, GONE)
+                    setViewVisibility(R.id.luckyNumberWidgetTitle, VISIBLE)
+                    setViewVisibility(R.id.luckyNumberWidgetNumber, VISIBLE)
+                }
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainActivity.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainActivity.kt
index 4448e556b..991c1d106 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainActivity.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainActivity.kt
@@ -4,66 +4,92 @@ import android.content.Context
 import android.content.Intent
 import android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK
 import android.content.Intent.FLAG_ACTIVITY_NEW_TASK
+import android.os.Build.VERSION.SDK_INT
+import android.os.Build.VERSION_CODES.LOLLIPOP
 import android.os.Bundle
-import android.os.Handler
 import android.view.Menu
 import android.view.MenuItem
-import androidx.appcompat.app.AlertDialog
-import androidx.core.content.ContextCompat
+import androidx.core.graphics.ColorUtils
+import androidx.core.view.ViewCompat
 import androidx.fragment.app.DialogFragment
 import androidx.fragment.app.Fragment
 import com.aurelhubert.ahbottomnavigation.AHBottomNavigation.TitleState.ALWAYS_SHOW
 import com.aurelhubert.ahbottomnavigation.AHBottomNavigationItem
+import com.google.android.material.elevation.ElevationOverlayProvider
 import com.ncapdevi.fragnav.FragNavController
 import com.ncapdevi.fragnav.FragNavController.Companion.HIDE
+import dagger.Lazy
 import io.github.wulkanowy.R
 import io.github.wulkanowy.ui.base.BaseActivity
 import io.github.wulkanowy.ui.modules.account.AccountDialog
 import io.github.wulkanowy.ui.modules.attendance.AttendanceFragment
 import io.github.wulkanowy.ui.modules.exam.ExamFragment
 import io.github.wulkanowy.ui.modules.grade.GradeFragment
-import io.github.wulkanowy.ui.modules.login.LoginActivity
+import io.github.wulkanowy.ui.modules.homework.HomeworkFragment
+import io.github.wulkanowy.ui.modules.luckynumber.LuckyNumberFragment
+import io.github.wulkanowy.ui.modules.message.MessageFragment
 import io.github.wulkanowy.ui.modules.more.MoreFragment
+import io.github.wulkanowy.ui.modules.note.NoteFragment
 import io.github.wulkanowy.ui.modules.timetable.TimetableFragment
+import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.getThemeAttrColor
-import io.github.wulkanowy.utils.safelyPopFragment
+import io.github.wulkanowy.utils.safelyPopFragments
 import io.github.wulkanowy.utils.setOnViewChangeListener
 import kotlinx.android.synthetic.main.activity_main.*
 import javax.inject.Inject
 
-class MainActivity : BaseActivity(), MainView {
+class MainActivity : BaseActivity<MainPresenter>(), MainView {
 
     @Inject
-    lateinit var presenter: MainPresenter
+    override lateinit var presenter: MainPresenter
 
     @Inject
     lateinit var navController: FragNavController
 
-    companion object {
-        const val EXTRA_START_MENU_INDEX = "extraStartMenuIndex"
+    @Inject
+    lateinit var overlayProvider: Lazy<ElevationOverlayProvider>
 
-        fun getStartIntent(context: Context) = Intent(context, MainActivity::class.java)
+    companion object {
+        const val EXTRA_START_MENU = "extraStartMenu"
+
+        fun getStartIntent(context: Context, startMenu: MainView.Section? = null, clear: Boolean = false): Intent {
+            return Intent(context, MainActivity::class.java)
+                .apply {
+                    if (clear) flags = FLAG_ACTIVITY_NEW_TASK or FLAG_ACTIVITY_CLEAR_TASK
+                    startMenu?.let { putExtra(EXTRA_START_MENU, it) }
+                }
+        }
     }
 
-    override val isRootView: Boolean
-        get() = navController.isRootFragment
+    override val isRootView get() = navController.isRootFragment
 
-    override val currentViewTitle: String?
-        get() = (navController.currentFrag as? MainView.TitledView)?.titleStringId?.let { getString(it) }
+    override val currentStackSize get() = navController.currentStack?.size
 
-    override val currentStackSize: Int?
-        get() = navController.currentStack?.size
+    override val currentViewTitle get() = (navController.currentFrag as? MainView.TitledView)?.titleStringId?.let { getString(it) }
 
     override var startMenuIndex = 0
 
+    override var startMenuMoreIndex = -1
+
+    private val moreMenuFragments = mapOf<Int, Fragment>(
+        MainView.Section.MESSAGE.id to MessageFragment.newInstance(),
+        MainView.Section.HOMEWORK.id to HomeworkFragment.newInstance(),
+        MainView.Section.NOTE.id to NoteFragment.newInstance(),
+        MainView.Section.LUCKY_NUMBER.id to LuckyNumberFragment.newInstance()
+    )
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
         setSupportActionBar(mainToolbar)
         messageContainer = mainFragmentContainer
 
-        presenter.onAttachView(this, intent.getIntExtra(EXTRA_START_MENU_INDEX, -1))
-        navController.initialize(startMenuIndex, savedInstanceState)
+        presenter.onAttachView(this, intent.getSerializableExtra(EXTRA_START_MENU) as? MainView.Section)
+
+        with(navController) {
+            initialize(startMenuIndex, savedInstanceState)
+            pushFragment(moreMenuFragments[startMenuMoreIndex])
+        }
     }
 
     override fun onCreateOptionsMenu(menu: Menu?): Boolean {
@@ -72,30 +98,31 @@ class MainActivity : BaseActivity(), MainView {
     }
 
     override fun initView() {
-        mainBottomNav.run {
-            addItems(
-                mutableListOf(
-                    AHBottomNavigationItem(R.string.grade_title, R.drawable.ic_menu_main_grade_26dp, 0),
-                    AHBottomNavigationItem(R.string.attendance_title, R.drawable.ic_menu_main_attendance_24dp, 0),
-                    AHBottomNavigationItem(R.string.exam_title, R.drawable.ic_menu_main_exam_24dp, 0),
-                    AHBottomNavigationItem(R.string.timetable_title, R.drawable.ic_menu_main_timetable_24dp, 0),
-                    AHBottomNavigationItem(R.string.more_title, R.drawable.ic_menu_main_more_24dp, 0)
-                )
-            )
-            accentColor = ContextCompat.getColor(context, R.color.colorPrimary)
-            inactiveColor = getThemeAttrColor(android.R.attr.textColorSecondary)
-            defaultBackgroundColor = getThemeAttrColor(R.attr.bottomNavBackground)
+        with(mainToolbar) {
+            if (SDK_INT >= LOLLIPOP) stateListAnimator = null
+            setBackgroundColor(overlayProvider.get().compositeOverlayWithThemeSurfaceColorIfNeeded(dpToPx(4f)))
+        }
+
+        with(mainBottomNav) {
+            addItems(listOf(
+                AHBottomNavigationItem(R.string.grade_title, R.drawable.ic_main_grade, 0),
+                AHBottomNavigationItem(R.string.attendance_title, R.drawable.ic_main_attendance, 0),
+                AHBottomNavigationItem(R.string.exam_title, R.drawable.ic_main_exam, 0),
+                AHBottomNavigationItem(R.string.timetable_title, R.drawable.ic_main_timetable, 0),
+                AHBottomNavigationItem(R.string.more_title, R.drawable.ic_main_more, 0)
+            ))
+            accentColor = getThemeAttrColor(R.attr.colorPrimary)
+            inactiveColor = ColorUtils.setAlphaComponent(getThemeAttrColor(R.attr.colorOnSurface), 153)
+            defaultBackgroundColor = overlayProvider.get().compositeOverlayWithThemeSurfaceColorIfNeeded(dpToPx(8f))
             titleState = ALWAYS_SHOW
             currentItem = startMenuIndex
             isBehaviorTranslationEnabled = false
             setTitleTextSizeInSp(10f, 10f)
-            setOnTabSelectedListener { position, wasSelected ->
-                presenter.onTabSelected(position, wasSelected)
-            }
+            setOnTabSelectedListener(presenter::onTabSelected)
         }
 
-        navController.run {
-            setOnViewChangeListener { presenter.onViewChange() }
+        with(navController) {
+            setOnViewChangeListener(presenter::onViewChange)
             fragmentHideStrategy = HIDE
             rootFragments = listOf(
                 GradeFragment.newInstance(),
@@ -132,19 +159,12 @@ class MainActivity : BaseActivity(), MainView {
         navController.showDialogFragment(AccountDialog.newInstance())
     }
 
-    fun showExpiredDialog() {
-        AlertDialog.Builder(this)
-            .setTitle(R.string.main_session_expired)
-            .setMessage(R.string.main_session_relogin)
-            .setPositiveButton(R.string.main_log_in) { _, _ -> presenter.onLoginSelected() }
-            .setNegativeButton(android.R.string.cancel) { _, _ -> }
-            .show()
+    override fun showActionBarElevation(show: Boolean) {
+        ViewCompat.setElevation(mainToolbar, if (show) dpToPx(4f) else 0f)
     }
 
     override fun notifyMenuViewReselected() {
-        Handler().postDelayed({
-            (navController.currentStack?.get(0) as? MainView.MainChildView)?.onFragmentReselected()
-        }, 250)
+        (navController.currentStack?.getOrNull(0) as? MainView.MainChildView)?.onFragmentReselected()
     }
 
     fun showDialogFragment(dialog: DialogFragment) {
@@ -155,26 +175,17 @@ class MainActivity : BaseActivity(), MainView {
         navController.pushFragment(fragment)
     }
 
-    override fun popView() {
-        navController.safelyPopFragment()
+    override fun popView(depth: Int) {
+        navController.safelyPopFragments(depth)
     }
 
     override fun onBackPressed() {
         presenter.onBackPressed { super.onBackPressed() }
     }
 
-    override fun openLoginView() {
-        startActivity(LoginActivity.getStartIntent(this)
-            .apply { addFlags(FLAG_ACTIVITY_CLEAR_TASK or FLAG_ACTIVITY_NEW_TASK) })
-    }
-
-    override fun onSaveInstanceState(outState: Bundle?) {
+    override fun onSaveInstanceState(outState: Bundle) {
         super.onSaveInstanceState(outState)
         navController.onSaveInstanceState(outState)
-    }
-
-    override fun onDestroy() {
-        super.onDestroy()
-        presenter.onDetachView()
+        intent.removeExtra(EXTRA_START_MENU)
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainModule.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainModule.kt
index de4405b74..bbaea51ce 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainModule.kt
@@ -1,5 +1,6 @@
 package io.github.wulkanowy.ui.modules.main
 
+import com.google.android.material.elevation.ElevationOverlayProvider
 import com.ncapdevi.fragnav.FragNavController
 import dagger.Module
 import dagger.Provides
@@ -7,7 +8,8 @@ import dagger.android.ContributesAndroidInjector
 import io.github.wulkanowy.R
 import io.github.wulkanowy.di.scopes.PerFragment
 import io.github.wulkanowy.ui.modules.about.AboutFragment
-import io.github.wulkanowy.ui.modules.about.AboutModule
+import io.github.wulkanowy.ui.modules.about.license.LicenseFragment
+import io.github.wulkanowy.ui.modules.about.license.LicenseModule
 import io.github.wulkanowy.ui.modules.account.AccountDialog
 import io.github.wulkanowy.ui.modules.attendance.AttendanceFragment
 import io.github.wulkanowy.ui.modules.attendance.summary.AttendanceSummaryFragment
@@ -19,23 +21,32 @@ import io.github.wulkanowy.ui.modules.luckynumber.LuckyNumberFragment
 import io.github.wulkanowy.ui.modules.message.MessageFragment
 import io.github.wulkanowy.ui.modules.message.MessageModule
 import io.github.wulkanowy.ui.modules.message.preview.MessagePreviewFragment
+import io.github.wulkanowy.ui.modules.mobiledevice.MobileDeviceFragment
+import io.github.wulkanowy.ui.modules.mobiledevice.MobileDeviceModule
+import io.github.wulkanowy.ui.modules.mobiledevice.token.MobileDeviceTokenDialog
 import io.github.wulkanowy.ui.modules.more.MoreFragment
 import io.github.wulkanowy.ui.modules.note.NoteFragment
+import io.github.wulkanowy.ui.modules.schoolandteachers.SchoolAndTeachersFragment
+import io.github.wulkanowy.ui.modules.schoolandteachers.SchoolAndTeachersModule
 import io.github.wulkanowy.ui.modules.settings.SettingsFragment
 import io.github.wulkanowy.ui.modules.timetable.TimetableFragment
 import io.github.wulkanowy.ui.modules.timetable.completed.CompletedLessonsFragment
 
-@Module
+@Suppress("unused")
+@Module(includes = [MainModule.Static::class])
 abstract class MainModule {
 
     @Module
-    companion object {
+    object Static {
 
-        @JvmStatic
         @Provides
         fun provideFragNavController(activity: MainActivity): FragNavController {
             return FragNavController(activity.supportFragmentManager, R.id.mainFragmentContainer)
         }
+
+        //In activities must be injected as Lazy
+        @Provides
+        fun provideElevationOverlayProvider(activity: MainActivity) = ElevationOverlayProvider(activity)
     }
 
     @PerFragment
@@ -71,7 +82,7 @@ abstract class MainModule {
     abstract fun bindTimetableFragment(): TimetableFragment
 
     @PerFragment
-    @ContributesAndroidInjector(modules = [AboutModule::class])
+    @ContributesAndroidInjector
     abstract fun bindAboutFragment(): AboutFragment
 
     @PerFragment
@@ -97,4 +108,20 @@ abstract class MainModule {
     @PerFragment
     @ContributesAndroidInjector
     abstract fun bindAccountDialog(): AccountDialog
+
+    @PerFragment
+    @ContributesAndroidInjector(modules = [MobileDeviceModule::class])
+    abstract fun bindMobileDevices(): MobileDeviceFragment
+
+    @PerFragment
+    @ContributesAndroidInjector
+    abstract fun bindMobileDeviceDialog(): MobileDeviceTokenDialog
+
+    @PerFragment
+    @ContributesAndroidInjector(modules = [LicenseModule::class])
+    abstract fun bindLicenseFragment(): LicenseFragment
+
+    @PerFragment
+    @ContributesAndroidInjector(modules = [SchoolAndTeachersModule::class])
+    abstract fun bindSchoolAndTeachersFragment(): SchoolAndTeachersFragment
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainPresenter.kt
index 30f3b920f..1c0fd39f3 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainPresenter.kt
@@ -1,47 +1,45 @@
 package io.github.wulkanowy.ui.modules.main
 
-import com.google.firebase.analytics.FirebaseAnalytics.Event.APP_OPEN
-import com.google.firebase.analytics.FirebaseAnalytics.Param.DESTINATION
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.services.sync.SyncManager
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.ui.modules.main.MainView.Section.GRADE
+import io.github.wulkanowy.ui.modules.main.MainView.Section.MESSAGE
+import io.github.wulkanowy.ui.modules.main.MainView.Section.SCHOOL
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
-import io.reactivex.Completable
 import timber.log.Timber
 import javax.inject.Inject
 
 class MainPresenter @Inject constructor(
-    private val errorHandler: ErrorHandler,
-    private val studentRepository: StudentRepository,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val prefRepository: PreferencesRepository,
     private val syncManager: SyncManager,
-    private val schedulers: SchedulersProvider,
     private val analytics: FirebaseAnalyticsHelper
-) : BasePresenter<MainView>(errorHandler) {
+) : BasePresenter<MainView>(errorHandler, studentRepository, schedulers) {
 
-    fun onAttachView(view: MainView, initMenuIndex: Int) {
+    fun onAttachView(view: MainView, initMenu: MainView.Section?) {
         super.onAttachView(view)
-        view.run {
-            startMenuIndex = if (initMenuIndex != -1) initMenuIndex else prefRepository.startMenuIndex
-            Timber.i("Main view is attached with $startMenuIndex menu index")
+        view.apply {
+            getProperViewIndexes(initMenu).let { (main, more) ->
+                startMenuIndex = main
+                startMenuMoreIndex = more
+            }
             initView()
+            Timber.i("Main view was initialized with $startMenuIndex menu index and $startMenuMoreIndex more index")
         }
 
         syncManager.startSyncWorker()
-
-        analytics.logEvent(APP_OPEN, DESTINATION to when (initMenuIndex) {
-            1 -> "Grades"
-            3 -> "Timetable"
-            4 -> "More"
-            else -> "User action"
-        })
+        analytics.logEvent("app_open", "destination" to initMenu?.name)
     }
 
-    fun onViewChange() {
+    fun onViewChange(section: MainView.Section?) {
         view?.apply {
+            showActionBarElevation(section != GRADE && section != MESSAGE && section != SCHOOL)
             currentViewTitle?.let { setViewTitle(it) }
             currentStackSize?.let {
                 if (it > 1) showHomeArrow(true)
@@ -83,25 +81,11 @@ class MainPresenter @Inject constructor(
         } == true
     }
 
-    fun onLoginSelected() {
-        Timber.i("Attempt to switch the student after the session expires")
-        disposable.add(studentRepository.getCurrentStudent(false)
-            .flatMapCompletable { studentRepository.logoutStudent(it) }
-            .andThen(studentRepository.getSavedStudents(false))
-            .flatMapCompletable {
-                if (it.isNotEmpty()) {
-                    Timber.i("Switching current student")
-                    studentRepository.switchStudent(it[0])
-                } else Completable.complete()
-            }
-            .subscribeOn(schedulers.backgroundThread)
-            .observeOn(schedulers.mainThread)
-            .subscribe({
-                Timber.i("Switch student result: Open login view")
-                view?.openLoginView()
-            }, {
-                Timber.i("Switch student result: An exception occurred")
-                errorHandler.dispatch(it)
-            }))
+    private fun getProperViewIndexes(initMenu: MainView.Section?): Pair<Int, Int> {
+        return when (initMenu?.id) {
+            in 0..3 -> initMenu!!.id to -1
+            in 4..10 -> 4 to initMenu!!.id
+            else -> prefRepository.startMenuIndex to -1
+        }
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainView.kt
index d3d7e342f..033b6a1f6 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainView.kt
@@ -6,6 +6,8 @@ interface MainView : BaseView {
 
     var startMenuIndex: Int
 
+    var startMenuMoreIndex: Int
+
     val isRootView: Boolean
 
     val currentViewTitle: String?
@@ -20,13 +22,13 @@ interface MainView : BaseView {
 
     fun showAccountPicker()
 
+    fun showActionBarElevation(show: Boolean)
+
     fun notifyMenuViewReselected()
 
     fun setViewTitle(title: String)
 
-    fun popView()
-
-    fun openLoginView()
+    fun popView(depth: Int = 1)
 
     interface MainChildView {
 
@@ -37,4 +39,19 @@ interface MainView : BaseView {
 
         val titleStringId: Int
     }
+
+    enum class Section(val id: Int) {
+        GRADE(0),
+        ATTENDANCE(1),
+        EXAM(2),
+        TIMETABLE(3),
+        MORE(4),
+        MESSAGE(5),
+        HOMEWORK(6),
+        NOTE(7),
+        LUCKY_NUMBER(8),
+        SETTINGS(9),
+        ABOUT(10),
+        SCHOOL(11)
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageFragment.kt
index d8a6bc84c..7a3e135dd 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageFragment.kt
@@ -7,6 +7,7 @@ import android.view.View.INVISIBLE
 import android.view.View.VISIBLE
 import android.view.ViewGroup
 import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.Message
 import io.github.wulkanowy.data.repositories.message.MessageFolder.RECEIVED
 import io.github.wulkanowy.data.repositories.message.MessageFolder.SENT
 import io.github.wulkanowy.data.repositories.message.MessageFolder.TRASHED
@@ -15,6 +16,7 @@ import io.github.wulkanowy.ui.base.BaseFragmentPagerAdapter
 import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.ui.modules.message.send.SendMessageActivity
 import io.github.wulkanowy.ui.modules.message.tab.MessageTabFragment
+import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.setOnSelectPageListener
 import kotlinx.android.synthetic.main.fragment_message.*
 import javax.inject.Inject
@@ -31,11 +33,9 @@ class MessageFragment : BaseFragment(), MessageView, MainView.TitledView {
         fun newInstance() = MessageFragment()
     }
 
-    override val titleStringId: Int
-        get() = R.string.message_title
+    override val titleStringId get() = R.string.message_title
 
-    override val currentPageIndex: Int
-        get() = messageViewPager.currentItem
+    override val currentPageIndex get() = messageViewPager.currentItem
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.fragment_message, container, false)
@@ -47,7 +47,7 @@ class MessageFragment : BaseFragment(), MessageView, MainView.TitledView {
     }
 
     override fun initView() {
-        pagerAdapter.apply {
+        with(pagerAdapter) {
             containerId = messageViewPager.id
             addFragmentsWithTitle(mapOf(
                 MessageTabFragment.newInstance(RECEIVED) to getString(R.string.message_inbox),
@@ -56,12 +56,16 @@ class MessageFragment : BaseFragment(), MessageView, MainView.TitledView {
             ))
         }
 
-        messageViewPager.run {
+        with(messageViewPager) {
             adapter = pagerAdapter
             offscreenPageLimit = 2
-            setOnSelectPageListener { presenter.onPageSelected(it) }
+            setOnSelectPageListener(presenter::onPageSelected)
+        }
+
+        with(messageTabLayout) {
+            setupWithViewPager(messageViewPager)
+            setElevationCompat(context.dpToPx(4f))
         }
-        messageTabLayout.setupWithViewPager(messageViewPager)
 
         openSendMessageButton.setOnClickListener { presenter.onSendMessageButtonClicked() }
     }
@@ -75,12 +79,20 @@ class MessageFragment : BaseFragment(), MessageView, MainView.TitledView {
         messageProgress.visibility = if (show) VISIBLE else INVISIBLE
     }
 
+    fun onDeleteMessage(message: Message) {
+        presenter.onDeleteMessage(message)
+    }
+
     fun onChildFragmentLoaded() {
         presenter.onChildViewLoaded()
     }
 
+    override fun notifyChildMessageDeleted(tabId: Int) {
+        (pagerAdapter.getFragmentInstance(tabId) as? MessageTabFragment)?.onParentDeleteMessage()
+    }
+
     override fun notifyChildLoadData(index: Int, forceRefresh: Boolean) {
-        (pagerAdapter.getFragmentInstance(index) as? MessageView.MessageChildView)?.onParentLoadData(forceRefresh)
+        (pagerAdapter.getFragmentInstance(index) as? MessageTabFragment)?.onParentLoadData(forceRefresh)
     }
 
     override fun openSendMessage() {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageItem.kt
index 26568e22f..19d6ad1de 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageItem.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageItem.kt
@@ -9,6 +9,7 @@ import eu.davidea.flexibleadapter.items.IFlexible
 import eu.davidea.viewholders.FlexibleViewHolder
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Message
+import io.github.wulkanowy.data.repositories.message.MessageFolder
 import io.github.wulkanowy.utils.toFormattedString
 import kotlinx.android.extensions.LayoutContainer
 import kotlinx.android.synthetic.main.item_message.*
@@ -27,7 +28,7 @@ class MessageItem(val message: Message, private val noSubjectString: String) :
             val style = if (message.unread) BOLD else NORMAL
 
             messageItemAuthor.run {
-                text = if (message.recipient.isNotBlank()) message.recipient else message.sender
+                text = if (message.folderId == MessageFolder.SENT.id) message.recipient else message.sender
                 setTypeface(null, style)
             }
             messageItemSubject.run {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageModule.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageModule.kt
index e4c202d9f..b25219025 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageModule.kt
@@ -8,13 +8,13 @@ import io.github.wulkanowy.di.scopes.PerFragment
 import io.github.wulkanowy.ui.base.BaseFragmentPagerAdapter
 import io.github.wulkanowy.ui.modules.message.tab.MessageTabFragment
 
-@Module
+@Suppress("unused")
+@Module(includes = [MessageModule.Static::class])
 abstract class MessageModule {
 
     @Module
-    companion object {
+    object Static {
 
-        @JvmStatic
         @PerFragment
         @Provides
         fun provideMessageAdapter(fragment: MessageFragment) = BaseFragmentPagerAdapter(fragment.childFragmentManager)
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessagePresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessagePresenter.kt
index 332d5b74f..0f5598b23 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessagePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessagePresenter.kt
@@ -1,5 +1,7 @@
 package io.github.wulkanowy.ui.modules.message
 
+import io.github.wulkanowy.data.db.entities.Message
+import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.SchedulersProvider
@@ -9,16 +11,17 @@ import java.util.concurrent.TimeUnit.MILLISECONDS
 import javax.inject.Inject
 
 class MessagePresenter @Inject constructor(
+    schedulers: SchedulersProvider,
     errorHandler: ErrorHandler,
-    private val schedulers: SchedulersProvider
-) : BasePresenter<MessageView>(errorHandler) {
+    studentRepository: StudentRepository
+) : BasePresenter<MessageView>(errorHandler, studentRepository, schedulers) {
 
     override fun onAttachView(view: MessageView) {
         super.onAttachView(view)
-        Timber.i("Message view is attached")
         disposable.add(Completable.timer(150, MILLISECONDS, schedulers.mainThread)
             .subscribe {
                 view.initView()
+                Timber.i("Message view was initialized")
                 loadData()
             })
     }
@@ -43,6 +46,15 @@ class MessagePresenter @Inject constructor(
         }
     }
 
+    fun onDeleteMessage(message: Message) {
+        view?.notifyChildMessageDeleted(
+            when (message.removed) {
+                true -> 2
+                else -> message.folderId - 1
+            }
+        )
+    }
+
     fun onSendMessageButtonClicked() {
         view?.openSendMessage()
     }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageView.kt
index 41257ecc7..2aa4d78ec 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessageView.kt
@@ -14,10 +14,7 @@ interface MessageView : BaseView {
 
     fun notifyChildLoadData(index: Int, forceRefresh: Boolean)
 
+    fun notifyChildMessageDeleted(tabId: Int)
+
     fun openSendMessage()
-
-    interface MessageChildView {
-
-        fun onParentLoadData(forceRefresh: Boolean)
-    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewFragment.kt
index 102567eda..22231e429 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewFragment.kt
@@ -12,32 +12,40 @@ import android.view.View.VISIBLE
 import android.view.ViewGroup
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Message
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
+import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.ui.modules.message.MessageFragment
 import io.github.wulkanowy.ui.modules.message.send.SendMessageActivity
 import kotlinx.android.synthetic.main.fragment_message_preview.*
 import javax.inject.Inject
 
-@SuppressLint("SetTextI18n")
-class MessagePreviewFragment : BaseSessionFragment(), MessagePreviewView, MainView.TitledView {
+class MessagePreviewFragment : BaseFragment(), MessagePreviewView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: MessagePreviewPresenter
 
     private var menuReplyButton: MenuItem? = null
 
+    private var menuForwardButton: MenuItem? = null
+
+    private var menuDeleteButton: MenuItem? = null
+
     override val titleStringId: Int
         get() = R.string.message_title
 
     override val noSubjectString: String
         get() = getString(R.string.message_no_subject)
 
+    override val deleteMessageSuccessString: String
+        get() = getString(R.string.message_delete_success)
+
     companion object {
         const val MESSAGE_ID_KEY = "message_id"
 
-        fun newInstance(messageId: Int?): MessagePreviewFragment {
+        fun newInstance(messageId: Long): MessagePreviewFragment {
             return MessagePreviewFragment().apply {
-                arguments = Bundle().apply { putInt(MESSAGE_ID_KEY, messageId ?: 0) }
+                arguments = Bundle().apply { putLong(MESSAGE_ID_KEY, messageId) }
             }
         }
     }
@@ -54,28 +62,40 @@ class MessagePreviewFragment : BaseSessionFragment(), MessagePreviewView, MainVi
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
         messageContainer = messagePreviewContainer
-        presenter.onAttachView(this, (savedInstanceState ?: arguments)?.getInt(MESSAGE_ID_KEY) ?: 0)
+        presenter.onAttachView(this, (savedInstanceState ?: arguments)?.getLong(MESSAGE_ID_KEY) ?: 0L)
     }
 
-    override fun onCreateOptionsMenu(menu: Menu?, inflater: MenuInflater?) {
-        inflater?.inflate(R.menu.action_menu_message_preview, menu)
-        menuReplyButton = menu?.findItem(R.id.messagePreviewMenuReply)
+    override fun initView() {
+        messagePreviewErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
+        inflater.inflate(R.menu.action_menu_message_preview, menu)
+        menuReplyButton = menu.findItem(R.id.messagePreviewMenuReply)
+        menuForwardButton = menu.findItem(R.id.messagePreviewMenuForward)
+        menuDeleteButton = menu.findItem(R.id.messagePreviewMenuDelete)
         presenter.onCreateOptionsMenu()
     }
 
-    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
-        return if (item?.itemId == R.id.messagePreviewMenuReply) presenter.onReply()
-        else false
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return when (item.itemId) {
+            R.id.messagePreviewMenuReply -> presenter.onReply()
+            R.id.messagePreviewMenuForward -> presenter.onForward()
+            R.id.messagePreviewMenuDelete -> presenter.onMessageDelete()
+            else -> false
+        }
     }
 
     override fun setSubject(subject: String) {
         messagePreviewSubject.text = subject
     }
 
+    @SuppressLint("SetTextI18n")
     override fun setRecipient(recipient: String) {
         messagePreviewAuthor.text = "${getString(R.string.message_to)} $recipient"
     }
 
+    @SuppressLint("SetTextI18n")
     override fun setSender(sender: String) {
         messagePreviewAuthor.text = "${getString(R.string.message_from)} $sender"
     }
@@ -92,21 +112,55 @@ class MessagePreviewFragment : BaseSessionFragment(), MessagePreviewView, MainVi
         messagePreviewProgress.visibility = if (show) VISIBLE else GONE
     }
 
-    override fun showReplyButton(show: Boolean) {
-        menuReplyButton?.isVisible = show
+    override fun showContent(show: Boolean) {
+        messagePreviewContentContainer.visibility = if (show) VISIBLE else GONE
     }
 
-    override fun showMessageError() {
-        messagePreviewError.visibility = VISIBLE
+    override fun showOptions(show: Boolean) {
+        menuReplyButton?.isVisible = show
+        menuForwardButton?.isVisible = show
+        menuDeleteButton?.isVisible = show
+    }
+
+    override fun setDeletedOptionsLabels() {
+        menuDeleteButton?.setTitle(R.string.message_delete_forever)
+    }
+
+    override fun setNotDeletedOptionsLabels() {
+        menuDeleteButton?.setTitle(R.string.message_move_to_bin)
+    }
+
+    override fun showErrorView(show: Boolean) {
+        messagePreviewError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        messagePreviewErrorMessage.text = message
+    }
+
+    override fun setErrorRetryCallback(callback: () -> Unit) {
+        messagePreviewErrorRetry.setOnClickListener { callback() }
     }
 
     override fun openMessageReply(message: Message?) {
+        context?.let { it.startActivity(SendMessageActivity.getStartIntent(it, message, true)) }
+    }
+
+    override fun openMessageForward(message: Message?) {
         context?.let { it.startActivity(SendMessageActivity.getStartIntent(it, message)) }
     }
 
+    override fun popView() {
+        (activity as MainActivity).popView()
+    }
+
+    override fun notifyParentMessageDeleted(message: Message) {
+        parentFragmentManager.fragments.forEach { if (it is MessageFragment) it.onDeleteMessage(message) }
+    }
+
     override fun onSaveInstanceState(outState: Bundle) {
         super.onSaveInstanceState(outState)
-        outState.putInt(MESSAGE_ID_KEY, presenter.messageId)
+        outState.putLong(MESSAGE_ID_KEY, presenter.messageId)
     }
 
     override fun onDestroyView() {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewPresenter.kt
index a5ed9f28c..7b7404b86 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewPresenter.kt
@@ -1,11 +1,11 @@
 package io.github.wulkanowy.ui.modules.message.preview
 
-import com.google.firebase.analytics.FirebaseAnalytics.Param.START_DATE
 import io.github.wulkanowy.data.db.entities.Message
+import io.github.wulkanowy.data.repositories.message.MessageFolder
 import io.github.wulkanowy.data.repositories.message.MessageRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import io.github.wulkanowy.utils.toFormattedString
@@ -13,23 +13,41 @@ import timber.log.Timber
 import javax.inject.Inject
 
 class MessagePreviewPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val messageRepository: MessageRepository,
-    private val studentRepository: StudentRepository,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<MessagePreviewView>(errorHandler) {
+) : BasePresenter<MessagePreviewView>(errorHandler, studentRepository, schedulers) {
 
-    var messageId: Int = 0
+    var messageId = 0L
 
-    private var replyMessage: Message? = null
+    private var message: Message? = null
 
-    fun onAttachView(view: MessagePreviewView, id: Int) {
+    private lateinit var lastError: Throwable
+
+    private var retryCallback: () -> Unit = {}
+
+    fun onAttachView(view: MessagePreviewView, id: Long) {
         super.onAttachView(view)
+        view.initView()
+        errorHandler.showErrorMessage = ::showErrorViewOnError
         loadData(id)
     }
 
-    private fun loadData(id: Int) {
+    private fun onMessageLoadRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(messageId)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
+    private fun loadData(id: Long) {
         Timber.i("Loading message $id preview started")
         messageId = id
         disposable.apply {
@@ -41,35 +59,101 @@ class MessagePreviewPresenter @Inject constructor(
                 .doFinally { view?.showProgress(false) }
                 .subscribe({ message ->
                     Timber.i("Loading message $id preview result: Success ")
-                    replyMessage = message
+                    this@MessagePreviewPresenter.message = message
                     view?.run {
                         message.let {
                             setSubject(if (it.subject.isNotBlank()) it.subject else noSubjectString)
                             setDate(it.date.toFormattedString("yyyy-MM-dd HH:mm:ss"))
-                            setContent(it.content.orEmpty())
-                            showReplyButton(true)
+                            setContent(it.content)
+                            initOptions()
 
-                            if (it.recipient.isNotBlank()) setRecipient(it.recipient)
+                            if (it.folderId == MessageFolder.SENT.id) setRecipient(it.recipient)
                             else setSender(it.sender)
                         }
                     }
-                    analytics.logEvent("load_message_preview", START_DATE to message.date.toFormattedString("yyyy.MM.dd"), "length" to message.content?.length)
+                    analytics.logEvent("load_message_preview", "length" to message.content.length)
                 }) {
                     Timber.i("Loading message $id preview result: An exception occurred ")
-                    view?.showMessageError()
+                    retryCallback = { onMessageLoadRetry() }
                     errorHandler.dispatch(it)
                 })
         }
     }
 
     fun onReply(): Boolean {
-        return if (replyMessage != null) {
-            view?.openMessageReply(replyMessage)
+        return if (message != null) {
+            view?.openMessageReply(message)
             true
         } else false
     }
 
+    fun onForward(): Boolean {
+        return if (message != null) {
+            view?.openMessageForward(message)
+            true
+        } else false
+    }
+
+    private fun deleteMessage() {
+        message?.let { message ->
+            disposable.add(messageRepository.deleteMessage(message)
+                .subscribeOn(schedulers.backgroundThread)
+                .observeOn(schedulers.mainThread)
+                .doOnSubscribe {
+                    view?.run {
+                        showContent(false)
+                        showProgress(true)
+                        showOptions(false)
+                        showErrorView(false)
+                    }
+                }
+                .doFinally {
+                    view?.showProgress(false)
+                }
+                .subscribe({
+                    view?.run {
+                        notifyParentMessageDeleted(message)
+                        showMessage(deleteMessageSuccessString)
+                        popView()
+                    }
+                }, { error ->
+                    retryCallback = { onMessageDelete() }
+                    errorHandler.dispatch(error)
+                }, {
+                    view?.showErrorView(true)
+                })
+            )
+        }
+    }
+
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            lastError = error
+            setErrorDetails(message)
+            showErrorView(true)
+            setErrorRetryCallback { retryCallback() }
+        }
+    }
+
+    fun onMessageDelete(): Boolean {
+        deleteMessage()
+        return true
+    }
+
+    private fun initOptions() {
+        view?.apply {
+            showOptions(message != null)
+            message?.let {
+                when (it.removed) {
+                    true -> setDeletedOptionsLabels()
+                    false -> setNotDeletedOptionsLabels()
+                }
+            }
+
+        }
+    }
+
     fun onCreateOptionsMenu() {
-        view?.showReplyButton(replyMessage != null)
+        initOptions()
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewView.kt
index 464ea168c..d57766273 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewView.kt
@@ -1,12 +1,16 @@
 package io.github.wulkanowy.ui.modules.message.preview
 
 import io.github.wulkanowy.data.db.entities.Message
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
 
-interface MessagePreviewView : BaseSessionView {
+interface MessagePreviewView : BaseView {
 
     val noSubjectString: String
 
+    val deleteMessageSuccessString: String
+
+    fun initView()
+
     fun setSubject(subject: String)
 
     fun setRecipient(recipient: String)
@@ -19,9 +23,25 @@ interface MessagePreviewView : BaseSessionView {
 
     fun showProgress(show: Boolean)
 
-    fun showReplyButton(show: Boolean)
+    fun showContent(show: Boolean)
 
-    fun showMessageError()
+    fun notifyParentMessageDeleted(message: Message)
+
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
+    fun setErrorRetryCallback(callback: () -> Unit)
+
+    fun showOptions(show: Boolean)
+
+    fun setDeletedOptionsLabels()
+
+    fun setNotDeletedOptionsLabels()
 
     fun openMessageReply(message: Message?)
+
+    fun openMessageForward(message: Message?)
+
+    fun popView()
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/RecipientChip.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/RecipientChip.kt
deleted file mode 100644
index be433b008..000000000
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/RecipientChip.kt
+++ /dev/null
@@ -1,30 +0,0 @@
-package io.github.wulkanowy.ui.modules.message.send
-
-import android.graphics.drawable.Drawable
-import android.net.Uri
-import com.pchmn.materialchips.model.ChipInterface
-import io.github.wulkanowy.data.db.entities.Recipient
-
-class RecipientChip(var recipient: Recipient) : ChipInterface {
-
-    override fun getAvatarDrawable(): Drawable? = null
-
-    override fun getAvatarUri(): Uri? = null
-
-    override fun getId(): Any = recipient.id
-
-    override fun getLabel(): String = recipient.name
-
-    override fun getInfo(): String {
-        return recipient.realName.run {
-            substringBeforeLast("-").let { sub ->
-                when {
-                    (sub == this) -> this
-                    (sub.indexOf('(') != -1) -> indexOf("(").let { substring(if (it != -1) it else 0) }
-                    (sub.indexOf('[') != -1) -> indexOf("[").let { substring(if (it != -1) it else 0) }
-                    else -> substringAfter('-')
-                }
-            }.trim()
-        }
-    }
-}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/RecipientChipItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/RecipientChipItem.kt
new file mode 100644
index 000000000..dd2d2b9bd
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/RecipientChipItem.kt
@@ -0,0 +1,14 @@
+package io.github.wulkanowy.ui.modules.message.send
+
+import io.github.wulkanowy.data.db.entities.Recipient
+import io.github.wulkanowy.materialchipsinput.ChipItem
+
+data class RecipientChipItem(
+
+    override val title: String,
+
+    override val summary: String,
+
+    val recipient: Recipient
+
+) : ChipItem
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessageActivity.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessageActivity.kt
index edf14dd64..7b15da713 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessageActivity.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessageActivity.kt
@@ -2,46 +2,56 @@ package io.github.wulkanowy.ui.modules.message.send
 
 import android.content.Context
 import android.content.Intent
+import android.graphics.Rect
 import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
+import android.view.TouchDelegate
 import android.view.View.GONE
 import android.view.View.VISIBLE
 import android.widget.Toast
 import android.widget.Toast.LENGTH_LONG
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Message
-import io.github.wulkanowy.data.db.entities.Recipient
 import io.github.wulkanowy.data.db.entities.ReportingUnit
 import io.github.wulkanowy.ui.base.BaseActivity
+import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.hideSoftInput
 import io.github.wulkanowy.utils.showSoftInput
 import kotlinx.android.synthetic.main.activity_send_message.*
 import javax.inject.Inject
 
-class SendMessageActivity : BaseActivity(), SendMessageView {
+class SendMessageActivity : BaseActivity<SendMessagePresenter>(), SendMessageView {
 
     @Inject
-    lateinit var presenter: SendMessagePresenter
+    override lateinit var presenter: SendMessagePresenter
 
     companion object {
         private const val EXTRA_MESSAGE = "EXTRA_MESSAGE"
 
+        private const val EXTRA_REPLY = "EXTRA_REPLY"
+
         fun getStartIntent(context: Context) = Intent(context, SendMessageActivity::class.java)
 
-        fun getStartIntent(context: Context, message: Message?): Intent {
-            return getStartIntent(context).putExtra(EXTRA_MESSAGE, message)
+        fun getStartIntent(context: Context, message: Message?, reply: Boolean = false): Intent {
+            return getStartIntent(context)
+                .putExtra(EXTRA_MESSAGE, message)
+                .putExtra(EXTRA_REPLY, reply)
         }
     }
 
-    override val formRecipientsData: List<Recipient>
-        get() = (sendMessageRecipientsInput.selectedChipList).map { (it as RecipientChip).recipient }
+    override val isDropdownListVisible: Boolean
+        get() = sendMessageTo.isDropdownListVisible
+
+    @Suppress("UNCHECKED_CAST")
+    override val formRecipientsData: List<RecipientChipItem>
+        get() = sendMessageTo.addedChipItems as List<RecipientChipItem>
 
     override val formSubjectValue: String
-        get() = sendMessageSubjectInput.text.toString()
+        get() = sendMessageSubject.text.toString()
 
     override val formContentValue: String
-        get() = sendMessageContentInput.text.toString()
+        get() = sendMessageMessageContent.text.toString()
 
     override val messageRequiredRecipients: String
         get() = getString(R.string.message_required_recipients)
@@ -59,7 +69,13 @@ class SendMessageActivity : BaseActivity(), SendMessageView {
         supportActionBar?.setDisplayHomeAsUpEnabled(true)
         messageContainer = sendMessageContainer
 
-        presenter.onAttachView(this, intent.getSerializableExtra(EXTRA_MESSAGE) as? Message)
+        presenter.onAttachView(this, intent.getSerializableExtra(EXTRA_MESSAGE) as? Message, intent.getSerializableExtra(EXTRA_REPLY) as? Boolean)
+    }
+
+    override fun initView() {
+        setUpExtendedHitArea()
+        sendMessageScroll.setOnTouchListener { _, _ -> presenter.onTouchScroll() }
+        sendMessageTo.onTextChangeListener = presenter::onRecipientsTextChange
     }
 
     override fun onCreateOptionsMenu(menu: Menu?): Boolean {
@@ -77,15 +93,15 @@ class SendMessageActivity : BaseActivity(), SendMessageView {
     }
 
     override fun setReportingUnit(unit: ReportingUnit) {
-        sendMessageFromTextView.setText(unit.senderName)
+        sendMessageFrom.text = unit.senderName
     }
 
-    override fun setRecipients(recipients: List<Recipient>) {
-        sendMessageRecipientsInput.filterableList = recipients.map { RecipientChip(it) }
+    override fun setRecipients(recipients: List<RecipientChipItem>) {
+        sendMessageTo.filterableChipItems = recipients
     }
 
-    override fun setSelectedRecipients(recipients: List<Recipient>) {
-        recipients.map { sendMessageRecipientsInput.addChip(RecipientChip(it)) }
+    override fun setSelectedRecipients(recipients: List<RecipientChipItem>) {
+        sendMessageTo.addChips(recipients)
     }
 
     override fun showProgress(show: Boolean) {
@@ -105,11 +121,11 @@ class SendMessageActivity : BaseActivity(), SendMessageView {
     }
 
     override fun setSubject(subject: String) {
-        sendMessageSubjectInput.setText(subject)
+        sendMessageSubject.setText(subject)
     }
 
     override fun setContent(content: String) {
-        sendMessageContentInput.setText(content)
+        sendMessageMessageContent.setText(content)
     }
 
     override fun showMessage(text: String) {
@@ -120,12 +136,41 @@ class SendMessageActivity : BaseActivity(), SendMessageView {
         if (show) showSoftInput() else hideSoftInput()
     }
 
+    override fun hideDropdownList() {
+        sendMessageTo.hideDropdownList()
+    }
+
+    override fun scrollToRecipients() {
+        sendMessageScroll.post {
+            sendMessageScroll.scrollTo(0, sendMessageTo.bottom - dpToPx(53f).toInt())
+        }
+    }
+
     override fun popView() {
         onBackPressed()
     }
 
-    override fun onDestroy() {
-        presenter.onDetachView()
-        super.onDestroy()
+    private fun setUpExtendedHitArea() {
+        fun extendHitArea() {
+            val containerHitRect = Rect().apply {
+                sendMessageContent.getHitRect(this)
+            }
+
+            val contentHitRect = Rect().apply {
+                sendMessageMessageContent.getHitRect(this)
+            }
+
+            contentHitRect.top = contentHitRect.bottom
+            contentHitRect.bottom = containerHitRect.bottom
+
+            sendMessageContent.touchDelegate = TouchDelegate(contentHitRect, sendMessageMessageContent)
+        }
+
+        sendMessageMessageContent.post {
+            sendMessageMessageContent.addOnLayoutChangeListener { _, _, _, _, _, _, _, _, _ ->
+                extendHitArea()
+            }
+            extendHitArea()
+        }
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessagePresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessagePresenter.kt
index a3715aaa6..3b89b5cae 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessagePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessagePresenter.kt
@@ -19,43 +19,83 @@ import timber.log.Timber
 import javax.inject.Inject
 
 class SendMessagePresenter @Inject constructor(
-    private val errorHandler: ErrorHandler,
-    private val schedulers: SchedulersProvider,
-    private val studentRepository: StudentRepository,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val semesterRepository: SemesterRepository,
     private val messageRepository: MessageRepository,
     private val reportingUnitRepository: ReportingUnitRepository,
     private val recipientRepository: RecipientRepository,
     private val preferencesRepository: PreferencesRepository,
     private val analytics: FirebaseAnalyticsHelper
-) : BasePresenter<SendMessageView>(errorHandler) {
+) : BasePresenter<SendMessageView>(errorHandler, studentRepository, schedulers) {
 
-    fun onAttachView(view: SendMessageView, message: Message?) {
+    fun onAttachView(view: SendMessageView, message: Message?, reply: Boolean?) {
         super.onAttachView(view)
-        Timber.i("Send message view is attached")
-        loadData(message)
+        view.initView()
+        Timber.i("Send message view was initialized")
+        loadData(message, reply)
         view.apply {
             message?.let {
-                setSubject("RE: ${message.subject}")
-                if (preferencesRepository.fillMessageContent) {
-                    setContent(when (message.sender.isNotEmpty()) {
-                        true -> "\n\nOd: ${message.sender}\n"
-                        false -> "\n\nDo: ${message.recipient}\n"
-                    } + "Data: ${message.date.toFormattedString("yyyy-MM-dd HH:mm:ss")}\n\n${message.content}")
+                setSubject(when (reply) {
+                    true -> "RE: "
+                    else -> "FW: "
+                } + message.subject)
+                if (preferencesRepository.fillMessageContent || reply != true) {
+                    setContent(
+                        when (reply) {
+                            true -> "\n\n"
+                            else -> ""
+                        } + when (message.sender.isNotEmpty()) {
+                            true -> "Od: ${message.sender}\n"
+                            false -> "Do: ${message.recipient}\n"
+                        } + "Data: ${message.date.toFormattedString("yyyy-MM-dd HH:mm:ss")}\n\n${message.content}")
                 }
             }
         }
     }
 
+    fun onTouchScroll(): Boolean {
+        return view?.run {
+            if (isDropdownListVisible) {
+                hideDropdownList()
+                true
+            } else false
+        } == true
+    }
+
+    fun onRecipientsTextChange(text: String) {
+        if (text.isBlank()) return
+        view?.scrollToRecipients()
+    }
+
     fun onUpNavigate(): Boolean {
         view?.popView()
         return true
     }
 
-    private fun loadData(message: Message?) {
+    fun onSend(): Boolean {
+        view?.run {
+            when {
+                formRecipientsData.isEmpty() -> showMessage(messageRequiredRecipients)
+                formContentValue.length < 3 -> showMessage(messageContentMinLength)
+                else -> {
+                    sendMessage(
+                        subject = formSubjectValue,
+                        content = formContentValue,
+                        recipients = formRecipientsData.map { it.recipient }
+                    )
+                    return true
+                }
+            }
+        }
+        return false
+    }
+
+    private fun loadData(message: Message?, reply: Boolean?) {
         var reportingUnit: ReportingUnit? = null
-        var recipients: List<Recipient> = emptyList()
-        var selectedRecipient: List<Recipient> = emptyList()
+        var recipientChips: List<RecipientChipItem> = emptyList()
+        var selectedRecipientChips: List<RecipientChipItem> = emptyList()
 
         Timber.i("Loading recipients started")
         disposable.add(studentRepository.getCurrentStudent()
@@ -66,14 +106,14 @@ class SendMessagePresenter @Inject constructor(
                     .flatMap { recipientRepository.getRecipients(student, 2, it).toMaybe() }
                     .doOnSuccess {
                         Timber.i("Loading recipients result: Success, fetched %d recipients", it.size)
-                        recipients = it
+                        recipientChips = createChips(it)
                     }
                     .flatMapCompletable {
-                        if (message == null) Completable.complete()
+                        if (message == null || reply != true) Completable.complete()
                         else recipientRepository.getMessageRecipients(student, message)
                             .doOnSuccess {
                                 Timber.i("Loaded message recipients to reply result: Success, fetched %d recipients", it.size)
-                                selectedRecipient = it
+                                selectedRecipientChips = createChips(it)
                             }
                             .ignoreElement()
                     }
@@ -88,11 +128,11 @@ class SendMessagePresenter @Inject constructor(
             }
             .doFinally { view?.run { showProgress(false) } }
             .subscribe({
-                view?.apply {
+                view?.run {
                     if (reportingUnit !== null) {
                         reportingUnit?.let { setReportingUnit(it) }
-                        setRecipients(recipients)
-                        if (selectedRecipient.isNotEmpty()) setSelectedRecipients(selectedRecipient)
+                        setRecipients(recipientChips)
+                        if (selectedRecipientChips.isNotEmpty()) setSelectedRecipients(selectedRecipientChips)
                         showContent(true)
                     } else {
                         Timber.e("Loading recipients result: Can't find the reporting unit")
@@ -138,21 +178,29 @@ class SendMessagePresenter @Inject constructor(
         )
     }
 
-    fun onSend(): Boolean {
-        view?.run {
-            when {
-                formRecipientsData.isEmpty() -> showMessage(messageRequiredRecipients)
-                formContentValue.length < 3 -> showMessage(messageContentMinLength)
-                else -> {
-                    sendMessage(
-                        subject = formSubjectValue,
-                        content = formContentValue,
-                        recipients = formRecipientsData
-                    )
-                    return true
+    private fun createChips(recipients: List<Recipient>): List<RecipientChipItem> {
+        fun generateCorrectSummary(recipientRealName: String): String {
+            val substring = recipientRealName.substringBeforeLast("-")
+            return when {
+                substring == recipientRealName -> recipientRealName
+                substring.indexOf("(") != -1 -> {
+                    recipientRealName.indexOf("(")
+                        .let { recipientRealName.substring(if (it != -1) it else 0) }
                 }
-            }
+                substring.indexOf("[") != -1 -> {
+                    recipientRealName.indexOf("[")
+                        .let { recipientRealName.substring(if (it != -1) it else 0) }
+                }
+                else -> recipientRealName.substringAfter("-")
+            }.trim()
+        }
+
+        return recipients.map {
+            RecipientChipItem(
+                title = it.name,
+                summary = generateCorrectSummary(it.realName),
+                recipient = it
+            )
         }
-        return false
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessageView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessageView.kt
index 8a2cb4f61..2839f9ce7 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessageView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessageView.kt
@@ -1,12 +1,13 @@
 package io.github.wulkanowy.ui.modules.message.send
 
-import io.github.wulkanowy.data.db.entities.Recipient
 import io.github.wulkanowy.data.db.entities.ReportingUnit
 import io.github.wulkanowy.ui.base.BaseView
 
 interface SendMessageView : BaseView {
 
-    val formRecipientsData: List<Recipient>
+    val isDropdownListVisible: Boolean
+
+    val formRecipientsData: List<RecipientChipItem>
 
     val formSubjectValue: String
 
@@ -18,11 +19,13 @@ interface SendMessageView : BaseView {
 
     val messageSuccess: String
 
+    fun initView()
+
     fun setReportingUnit(unit: ReportingUnit)
 
-    fun setRecipients(recipients: List<Recipient>)
+    fun setRecipients(recipients: List<RecipientChipItem>)
 
-    fun setSelectedRecipients(recipients: List<Recipient>)
+    fun setSelectedRecipients(recipients: List<RecipientChipItem>)
 
     fun showProgress(show: Boolean)
 
@@ -38,5 +41,9 @@ interface SendMessageView : BaseView {
 
     fun showSoftInput(show: Boolean)
 
+    fun hideDropdownList()
+
+    fun scrollToRecipients()
+
     fun popView()
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabFragment.kt
index 047f2a34c..d6065983d 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabFragment.kt
@@ -13,17 +13,16 @@ import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.repositories.message.MessageFolder
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.message.MessageFragment
 import io.github.wulkanowy.ui.modules.message.MessageItem
-import io.github.wulkanowy.ui.modules.message.MessageView
 import io.github.wulkanowy.ui.modules.message.preview.MessagePreviewFragment
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_message_tab.*
 import javax.inject.Inject
 
-class MessageTabFragment : BaseSessionFragment(), MessageTabView, MessageView.MessageChildView {
+class MessageTabFragment : BaseFragment(), MessageTabView {
 
     @Inject
     lateinit var presenter: MessageTabPresenter
@@ -57,7 +56,7 @@ class MessageTabFragment : BaseSessionFragment(), MessageTabView, MessageView.Me
         super.onActivityCreated(savedInstanceState)
         messageContainer = messageTabRecycler
         presenter.onAttachView(this, MessageFolder.valueOf(
-            (savedInstanceState ?: arguments)?.getString(MessageTabFragment.MESSAGE_TAB_FOLDER_ID).orEmpty()
+            (savedInstanceState ?: arguments)?.getString(MESSAGE_TAB_FOLDER_ID).orEmpty()
         ))
     }
 
@@ -73,10 +72,12 @@ class MessageTabFragment : BaseSessionFragment(), MessageTabView, MessageView.Me
             )
         }
         messageTabSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+        messageTabErrorRetry.setOnClickListener { presenter.onRetry() }
+        messageTabErrorDetails.setOnClickListener { presenter.onDetailsClick() }
     }
 
     override fun updateData(data: List<MessageItem>) {
-        tabAdapter.updateDataSet(data, true)
+        tabAdapter.updateDataSet(data)
     }
 
     override fun updateItem(item: AbstractFlexibleItem<*>) {
@@ -103,11 +104,19 @@ class MessageTabFragment : BaseSessionFragment(), MessageTabView, MessageView.Me
         messageTabEmpty.visibility = if (show) VISIBLE else INVISIBLE
     }
 
+    override fun showErrorView(show: Boolean) {
+        messageTabError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        messageTabErrorMessage.text = message
+    }
+
     override fun showRefresh(show: Boolean) {
         messageTabSwipe.isRefreshing = show
     }
 
-    override fun openMessage(messageId: Int?) {
+    override fun openMessage(messageId: Long) {
         (activity as? MainActivity)?.pushView(MessagePreviewFragment.newInstance(messageId))
     }
 
@@ -115,13 +124,17 @@ class MessageTabFragment : BaseSessionFragment(), MessageTabView, MessageView.Me
         (parentFragment as? MessageFragment)?.onChildFragmentLoaded()
     }
 
-    override fun onParentLoadData(forceRefresh: Boolean) {
+    fun onParentLoadData(forceRefresh: Boolean) {
         presenter.onParentViewLoadData(forceRefresh)
     }
 
+    fun onParentDeleteMessage() {
+        presenter.onDeleteMessage()
+    }
+
     override fun onSaveInstanceState(outState: Bundle) {
         super.onSaveInstanceState(outState)
-        outState.putString(MessageTabFragment.MESSAGE_TAB_FOLDER_ID, presenter.folder.name)
+        outState.putString(MESSAGE_TAB_FOLDER_ID, presenter.folder.name)
     }
 
     override fun onDestroyView() {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabPresenter.kt
index 7d9fda0d3..dc199207a 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabPresenter.kt
@@ -4,9 +4,10 @@ import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.db.entities.Message
 import io.github.wulkanowy.data.repositories.message.MessageFolder
 import io.github.wulkanowy.data.repositories.message.MessageRepository
+import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.ui.modules.message.MessageItem
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
@@ -14,18 +15,22 @@ import timber.log.Timber
 import javax.inject.Inject
 
 class MessageTabPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val messageRepository: MessageRepository,
-    private val studentRepository: StudentRepository,
+    private val semesterRepository: SemesterRepository,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<MessageTabView>(errorHandler) {
+) : BasePresenter<MessageTabView>(errorHandler, studentRepository, schedulers) {
 
     lateinit var folder: MessageFolder
 
+    private lateinit var lastError: Throwable
+
     fun onAttachView(view: MessageTabView, folder: MessageFolder) {
         super.onAttachView(view)
         view.initView()
+        errorHandler.showErrorMessage = ::showErrorViewOnError
         this.folder = folder
     }
 
@@ -34,13 +39,50 @@ class MessageTabPresenter @Inject constructor(
         onParentViewLoadData(true)
     }
 
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(true)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
+    fun onDeleteMessage() {
+        loadData(false)
+    }
+
     fun onParentViewLoadData(forceRefresh: Boolean) {
+        loadData(forceRefresh)
+    }
+
+    fun onMessageItemSelected(item: AbstractFlexibleItem<*>) {
+        if (item is MessageItem) {
+            Timber.i("Select message ${item.message.id} item")
+            view?.run {
+                openMessage(item.message.id)
+                if (item.message.unread) {
+                    item.message.unread = false
+                    updateItem(item)
+                    updateMessage(item.message)
+                }
+            }
+        }
+    }
+
+    private fun loadData(forceRefresh: Boolean) {
         Timber.i("Loading $folder message data started")
         disposable.apply {
             clear()
             add(studentRepository.getCurrentStudent()
-                .flatMap { messageRepository.getMessages(it, folder, forceRefresh) }
-                .map { items -> items.map { MessageItem(it, view?.noSubjectString.orEmpty()) } }
+                .flatMap { student ->
+                    semesterRepository.getCurrentSemester(student)
+                        .flatMap { messageRepository.getMessages(student, it, folder, forceRefresh) }
+                        .map { items -> items.map { MessageItem(it, view?.noSubjectString.orEmpty()) } }
+                }
                 .subscribeOn(schedulers.backgroundThread)
                 .observeOn(schedulers.mainThread)
                 .doFinally {
@@ -56,39 +98,36 @@ class MessageTabPresenter @Inject constructor(
                     view?.run {
                         showEmpty(it.isEmpty())
                         showContent(it.isNotEmpty())
+                        showErrorView(false)
                         updateData(it)
                     }
                     analytics.logEvent("load_messages", "items" to it.size, "folder" to folder.name)
                 }) {
                     Timber.i("Loading $folder message result: An exception occurred")
-                    view?.run { showEmpty(isViewEmpty) }
                     errorHandler.dispatch(it)
                 })
         }
     }
 
-    fun onMessageItemSelected(item: AbstractFlexibleItem<*>) {
-        if (item is MessageItem) {
-            Timber.i("Select message ${item.message.realId} item")
-            view?.run {
-                openMessage(item.message.realId)
-                if (item.message.unread) {
-                    item.message.unread = false
-                    updateItem(item)
-                    updateMessage(item.message)
-                }
-            }
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
         }
     }
 
     private fun updateMessage(message: Message) {
-        Timber.i("Attempt to update message ${message.realId}")
+        Timber.i("Attempt to update message ${message.id}")
         disposable.add(messageRepository.updateMessage(message)
             .subscribeOn(schedulers.backgroundThread)
             .observeOn(schedulers.mainThread)
-            .subscribe({ Timber.d("Update message ${message.realId} result: Success") })
+            .subscribe({ Timber.d("Update message ${message.id} result: Success") })
             { error ->
-                Timber.i("Update message ${message.realId} result: An exception occurred")
+                Timber.i("Update message ${message.id} result: An exception occurred")
                 errorHandler.dispatch(error)
             })
     }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabView.kt
index bcda52b56..e5705c739 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabView.kt
@@ -1,10 +1,10 @@
 package io.github.wulkanowy.ui.modules.message.tab
 
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
 import io.github.wulkanowy.ui.modules.message.MessageItem
 
-interface MessageTabView : BaseSessionView {
+interface MessageTabView : BaseView {
 
     val noSubjectString: String
 
@@ -26,9 +26,13 @@ interface MessageTabView : BaseSessionView {
 
     fun showEmpty(show: Boolean)
 
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
     fun showRefresh(show: Boolean)
 
-    fun openMessage(messageId: Int?)
+    fun openMessage(messageId: Long)
 
     fun notifyParentDataLoaded()
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceAdapter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceAdapter.kt
new file mode 100644
index 000000000..27c72ce69
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceAdapter.kt
@@ -0,0 +1,10 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.IFlexible
+import io.github.wulkanowy.data.db.entities.MobileDevice
+
+class MobileDeviceAdapter<T : IFlexible<*>> : FlexibleAdapter<T>(null, null, true) {
+
+    var onDeviceUnregisterListener: (device: MobileDevice, position: Int) -> Unit = { _, _ -> }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceFragment.kt
new file mode 100644
index 000000000..d47574f60
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceFragment.kt
@@ -0,0 +1,134 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.view.ViewGroup
+import eu.davidea.flexibleadapter.common.FlexibleItemDecoration
+import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
+import eu.davidea.flexibleadapter.helpers.UndoHelper
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.ui.base.BaseFragment
+import io.github.wulkanowy.ui.modules.main.MainActivity
+import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.ui.modules.mobiledevice.token.MobileDeviceTokenDialog
+import kotlinx.android.synthetic.main.fragment_mobile_device.*
+import javax.inject.Inject
+
+class MobileDeviceFragment : BaseFragment(), MobileDeviceView, MainView.TitledView {
+
+    @Inject
+    lateinit var presenter: MobileDevicePresenter
+
+    @Inject
+    lateinit var devicesAdapter: MobileDeviceAdapter<AbstractFlexibleItem<*>>
+
+    companion object {
+        fun newInstance() = MobileDeviceFragment()
+    }
+
+    override val titleStringId: Int
+        get() = R.string.mobile_devices_title
+
+    override val isViewEmpty: Boolean
+        get() = devicesAdapter.isEmpty
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.fragment_mobile_device, container, false)
+    }
+
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        messageContainer = mobileDevicesRecycler
+        presenter.onAttachView(this)
+    }
+
+    override fun initView() {
+        with(mobileDevicesRecycler) {
+            layoutManager = SmoothScrollLinearLayoutManager(context)
+            adapter = devicesAdapter
+            addItemDecoration(FlexibleItemDecoration(context)
+                .withDefaultDivider()
+                .withDrawDividerOnLastItem(false)
+            )
+        }
+        with(devicesAdapter) {
+            isPermanentDelete = false
+            onDeviceUnregisterListener = presenter::onUnregisterDevice
+        }
+        mobileDevicesSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+        mobileDevicesErrorRetry.setOnClickListener { presenter.onRetry() }
+        mobileDevicesErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+        mobileDeviceAddButton.setOnClickListener { presenter.onRegisterDevice() }
+    }
+
+    override fun updateData(data: List<MobileDeviceItem>) {
+        devicesAdapter.updateDataSet(data)
+    }
+
+    override fun restoreDeleteItem() {
+        devicesAdapter.restoreDeletedItems()
+    }
+
+    override fun clearData() {
+        devicesAdapter.clear()
+    }
+
+    override fun showUndo(position: Int, device: MobileDevice) {
+        val onActionListener = object : UndoHelper.OnActionListener {
+            override fun onActionConfirmed(action: Int, event: Int) {
+                presenter.onUnregisterConfirmed(device)
+            }
+
+            override fun onActionCanceled(action: Int, positions: MutableList<Int>?) {
+                presenter.onUnregisterCancelled()
+            }
+        }
+
+        UndoHelper(devicesAdapter, onActionListener)
+            .withConsecutive(false)
+            .withAction(UndoHelper.Action.REMOVE)
+            .start(listOf(position), mobileDevicesRecycler, R.string.mobile_device_removed, R.string.all_undo, 3000)
+    }
+
+    override fun hideRefresh() {
+        mobileDevicesSwipe.isRefreshing = false
+    }
+
+    override fun showProgress(show: Boolean) {
+        mobileDevicesProgress.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun showEmpty(show: Boolean) {
+        mobileDevicesEmpty.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun showErrorView(show: Boolean) {
+        mobileDevicesError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        mobileDevicesErrorMessage.text = message
+    }
+
+    override fun enableSwipe(enable: Boolean) {
+        mobileDevicesSwipe.isEnabled = enable
+    }
+
+    override fun showContent(show: Boolean) {
+        mobileDevicesRecycler.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun showTokenDialog() {
+        (activity as? MainActivity)?.showDialogFragment(MobileDeviceTokenDialog.newInstance())
+    }
+
+    override fun onDestroyView() {
+        presenter.onDetachView()
+        super.onDestroyView()
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceItem.kt
new file mode 100644
index 000000000..436c2d0e2
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceItem.kt
@@ -0,0 +1,53 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import android.view.View
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import eu.davidea.flexibleadapter.items.IFlexible
+import eu.davidea.viewholders.FlexibleViewHolder
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.utils.toFormattedString
+import kotlinx.android.extensions.LayoutContainer
+import kotlinx.android.synthetic.main.item_mobile_device.*
+
+class MobileDeviceItem(val device: MobileDevice) : AbstractFlexibleItem<MobileDeviceItem.ViewHolder>() {
+
+    override fun getLayoutRes() = R.layout.item_mobile_device
+
+    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>): ViewHolder {
+        return ViewHolder(view, adapter)
+    }
+
+    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
+        holder.apply {
+            mobileDeviceItemDate.text = device.date.toFormattedString("dd.MM.yyyy HH:mm:ss")
+            mobileDeviceItemName.text = device.name
+            mobileDeviceItemUnregister.setOnClickListener {
+                (adapter as MobileDeviceAdapter).onDeviceUnregisterListener(device, holder.flexibleAdapterPosition)
+            }
+        }
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as MobileDeviceItem
+
+        if (device.id != other.device.id) return false
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = device.hashCode()
+        result = 31 * result + device.id.toInt()
+        return result
+    }
+
+    class ViewHolder(val view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter), LayoutContainer {
+
+        override val containerView: View
+            get() = contentView
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceModule.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceModule.kt
new file mode 100644
index 000000000..59bbaa9f8
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceModule.kt
@@ -0,0 +1,12 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import dagger.Module
+import dagger.Provides
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+
+@Module
+class MobileDeviceModule {
+
+    @Provides
+    fun provideMobileDeviceFlexibleAdapter() = MobileDeviceAdapter<AbstractFlexibleItem<*>>()
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDevicePresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDevicePresenter.kt
new file mode 100644
index 000000000..e95d2ce0e
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDevicePresenter.kt
@@ -0,0 +1,137 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.repositories.mobiledevice.MobileDeviceRepository
+import io.github.wulkanowy.data.repositories.semester.SemesterRepository
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
+import timber.log.Timber
+import javax.inject.Inject
+
+class MobileDevicePresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
+    private val semesterRepository: SemesterRepository,
+    private val mobileDeviceRepository: MobileDeviceRepository,
+    private val analytics: FirebaseAnalyticsHelper
+) : BasePresenter<MobileDeviceView>(errorHandler, studentRepository, schedulers) {
+
+    private lateinit var lastError: Throwable
+
+    override fun onAttachView(view: MobileDeviceView) {
+        super.onAttachView(view)
+        view.initView()
+        Timber.i("Mobile device view was initialized")
+        errorHandler.showErrorMessage = ::showErrorViewOnError
+        loadData()
+    }
+
+    fun onSwipeRefresh() {
+        loadData(true)
+    }
+
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(true)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
+    private fun loadData(forceRefresh: Boolean = false) {
+        Timber.i("Loading mobile devices data started")
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .flatMap { mobileDeviceRepository.getDevices(it, forceRefresh) }
+            .map { items -> items.map { MobileDeviceItem(it) } }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doFinally {
+                view?.run {
+                    hideRefresh()
+                    showProgress(false)
+                    enableSwipe(true)
+                }
+            }.subscribe({
+                Timber.i("Loading mobile devices result: Success")
+                view?.run {
+                    updateData(it)
+                    showContent(it.isNotEmpty())
+                    showEmpty(it.isEmpty())
+                    showErrorView(false)
+                }
+                analytics.logEvent("load_devices", "items" to it.size, "force_refresh" to forceRefresh)
+            }) {
+                Timber.i("Loading mobile devices result: An exception occurred")
+                errorHandler.dispatch(it)
+            })
+    }
+
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
+
+    fun onRegisterDevice() {
+        view?.showTokenDialog()
+    }
+
+    fun onUnregisterDevice(device: MobileDevice, position: Int) {
+        view?.run {
+            showUndo(position, device)
+            showEmpty(isViewEmpty)
+        }
+    }
+
+    fun onUnregisterCancelled() {
+        view?.run {
+            restoreDeleteItem()
+            showEmpty(isViewEmpty)
+        }
+    }
+
+    fun onUnregisterConfirmed(device: MobileDevice) {
+        Timber.i("Unregister device started")
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .flatMap { semester ->
+                mobileDeviceRepository.unregisterDevice(semester, device)
+                    .flatMap { mobileDeviceRepository.getDevices(semester, it) }
+            }
+            .map { items -> items.map { MobileDeviceItem(it) } }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doFinally {
+                view?.run {
+                    showProgress(false)
+                    enableSwipe(true)
+                }
+            }
+            .subscribe({
+                Timber.i("Unregister device result: Success")
+                view?.run {
+                    updateData(it)
+                    showContent(it.isNotEmpty())
+                    showEmpty(it.isEmpty())
+                }
+            }) {
+                Timber.i("Unregister device result: An exception occurred")
+                errorHandler.dispatch(it)
+            }
+        )
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceView.kt
new file mode 100644
index 000000000..869b59bb1
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceView.kt
@@ -0,0 +1,35 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.ui.base.BaseView
+
+interface MobileDeviceView : BaseView {
+
+    val isViewEmpty: Boolean
+
+    fun initView()
+
+    fun updateData(data: List<MobileDeviceItem>)
+
+    fun restoreDeleteItem()
+
+    fun hideRefresh()
+
+    fun clearData()
+
+    fun showProgress(show: Boolean)
+
+    fun enableSwipe(enable: Boolean)
+
+    fun showContent(show: Boolean)
+
+    fun showEmpty(show: Boolean)
+
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
+    fun showUndo(position: Int, device: MobileDevice)
+
+    fun showTokenDialog()
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenDialog.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenDialog.kt
new file mode 100644
index 000000000..8b81156b1
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenDialog.kt
@@ -0,0 +1,89 @@
+package io.github.wulkanowy.ui.modules.mobiledevice.token
+
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.graphics.BitmapFactory
+import android.os.Bundle
+import android.util.Base64
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.view.ViewGroup
+import android.widget.Toast
+import androidx.core.content.getSystemService
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.pojos.MobileDeviceToken
+import io.github.wulkanowy.ui.base.BaseDialogFragment
+import kotlinx.android.synthetic.main.dialog_mobile_device.*
+import javax.inject.Inject
+
+class MobileDeviceTokenDialog : BaseDialogFragment(), MobileDeviceTokenVIew {
+
+    @Inject
+    lateinit var presenter: MobileDeviceTokenPresenter
+
+    companion object {
+        fun newInstance(): MobileDeviceTokenDialog = MobileDeviceTokenDialog()
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setStyle(STYLE_NO_TITLE, 0)
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.dialog_mobile_device, container, false)
+    }
+
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        presenter.onAttachView(this)
+    }
+
+    override fun initView() {
+        mobileDeviceDialogClose.setOnClickListener { dismiss() }
+    }
+
+    override fun updateData(token: MobileDeviceToken) {
+        with(mobileDeviceDialogToken) {
+            text = token.token
+            setOnClickListener { clickCopy(token.token) }
+        }
+        with(mobileDeviceDialogSymbol) {
+            text = token.symbol
+            setOnClickListener { clickCopy(token.symbol) }
+        }
+        with(mobileDeviceDialogPin) {
+            text = token.pin
+            setOnClickListener { clickCopy(token.pin) }
+        }
+
+        mobileDeviceQr.setImageBitmap(Base64.decode(token.qr, Base64.DEFAULT).let {
+            BitmapFactory.decodeByteArray(it, 0, it.size)
+        })
+    }
+
+    private fun clickCopy(text: String) {
+        val clip = ClipData.newPlainText("wulkanowy", text)
+        activity?.getSystemService<ClipboardManager>()?.setPrimaryClip(clip)
+        Toast.makeText(context, R.string.all_copied, Toast.LENGTH_LONG).show()
+    }
+
+    override fun hideLoading() {
+        mobileDeviceDialogProgress.visibility = GONE
+    }
+
+    override fun showContent() {
+        mobileDeviceDialogContent.visibility = VISIBLE
+    }
+
+    override fun closeDialog() {
+        dismiss()
+    }
+
+    override fun onDestroyView() {
+        presenter.onDetachView()
+        super.onDestroyView()
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenPresenter.kt
new file mode 100644
index 000000000..a778cbeda
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenPresenter.kt
@@ -0,0 +1,51 @@
+package io.github.wulkanowy.ui.modules.mobiledevice.token
+
+import io.github.wulkanowy.data.repositories.mobiledevice.MobileDeviceRepository
+import io.github.wulkanowy.data.repositories.semester.SemesterRepository
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
+import timber.log.Timber
+import javax.inject.Inject
+
+class MobileDeviceTokenPresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
+    private val semesterRepository: SemesterRepository,
+    private val mobileDeviceRepository: MobileDeviceRepository,
+    private val analytics: FirebaseAnalyticsHelper
+) : BasePresenter<MobileDeviceTokenVIew>(errorHandler, studentRepository, schedulers) {
+
+    override fun onAttachView(view: MobileDeviceTokenVIew) {
+        super.onAttachView(view)
+        view.initView()
+        Timber.i("Mobile device view was initialized")
+        loadData()
+    }
+
+    private fun loadData() {
+        Timber.i("Mobile device registration data started")
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .flatMap { mobileDeviceRepository.getToken(it) }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doFinally { view?.hideLoading() }
+            .subscribe({
+                Timber.i("Mobile device registration result: Success")
+                view?.run {
+                    updateData(it)
+                    showContent()
+                }
+                analytics.logEvent("device_register", "symbol" to it.token.substring(0, 3))
+            }) {
+                Timber.i("Mobile device registration result: An exception occurred")
+                view?.closeDialog()
+                errorHandler.dispatch(it)
+            }
+        )
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenVIew.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenVIew.kt
new file mode 100644
index 000000000..950f8bcf0
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenVIew.kt
@@ -0,0 +1,17 @@
+package io.github.wulkanowy.ui.modules.mobiledevice.token
+
+import io.github.wulkanowy.data.pojos.MobileDeviceToken
+import io.github.wulkanowy.ui.base.BaseView
+
+interface MobileDeviceTokenVIew : BaseView {
+
+    fun initView()
+
+    fun hideLoading()
+
+    fun showContent()
+
+    fun closeDialog()
+
+    fun updateData(token: MobileDeviceToken)
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/more/MoreFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/more/MoreFragment.kt
index 5bbf6247a..ef9c36fab 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/more/MoreFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/more/MoreFragment.kt
@@ -5,7 +5,6 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import androidx.core.content.ContextCompat
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
@@ -17,8 +16,11 @@ import io.github.wulkanowy.ui.modules.luckynumber.LuckyNumberFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.ui.modules.message.MessageFragment
+import io.github.wulkanowy.ui.modules.mobiledevice.MobileDeviceFragment
 import io.github.wulkanowy.ui.modules.note.NoteFragment
+import io.github.wulkanowy.ui.modules.schoolandteachers.SchoolAndTeachersFragment
 import io.github.wulkanowy.ui.modules.settings.SettingsFragment
+import io.github.wulkanowy.utils.getCompatDrawable
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_more.*
 import javax.inject.Inject
@@ -38,52 +40,29 @@ class MoreFragment : BaseFragment(), MoreView, MainView.TitledView, MainView.Mai
     override val titleStringId: Int
         get() = R.string.more_title
 
-
     override val messagesRes: Pair<String, Drawable?>?
-        get() {
-            return context?.run {
-                getString(R.string.message_title) to
-                    ContextCompat.getDrawable(this, R.drawable.ic_more_messages_24dp)
-            }
-        }
+        get() = context?.run { getString(R.string.message_title) to getCompatDrawable(R.drawable.ic_more_messages) }
 
     override val homeworkRes: Pair<String, Drawable?>?
-        get() {
-            return context?.run {
-                getString(R.string.homework_title) to ContextCompat.getDrawable(this, R.drawable.ic_menu_main_homework_24dp)
-            }
-        }
+        get() = context?.run { getString(R.string.homework_title) to getCompatDrawable(R.drawable.ic_more_homework) }
 
     override val noteRes: Pair<String, Drawable?>?
-        get() {
-            return context?.run {
-                getString(R.string.note_title) to ContextCompat.getDrawable(this, R.drawable.ic_menu_main_note_24dp)
-            }
-        }
+        get() = context?.run { getString(R.string.note_title) to getCompatDrawable(R.drawable.ic_more_note) }
 
     override val luckyNumberRes: Pair<String, Drawable?>?
-        get() {
-            return context?.run {
-                getString(R.string.lucky_number_title) to
-                    ContextCompat.getDrawable(this, R.drawable.ic_more_lucky_number_24dp)
-            }
-        }
+        get() = context?.run { getString(R.string.lucky_number_title) to getCompatDrawable(R.drawable.ic_more_lucky_number) }
+
+    override val mobileDevicesRes: Pair<String, Drawable?>?
+        get() = context?.run { getString(R.string.mobile_devices_title) to getCompatDrawable(R.drawable.ic_more_mobile_devices) }
+
+    override val schoolAndTeachersRes: Pair<String, Drawable?>?
+        get() = context?.run { getString(R.string.schoolandteachers_title) to getCompatDrawable((R.drawable.ic_more_schoolandteachers)) }
 
     override val settingsRes: Pair<String, Drawable?>?
-        get() {
-            return context?.run {
-                getString(R.string.settings_title) to
-                    ContextCompat.getDrawable(this, R.drawable.ic_more_settings_24dp)
-            }
-        }
+        get() = context?.run { getString(R.string.settings_title) to getCompatDrawable(R.drawable.ic_more_settings) }
 
     override val aboutRes: Pair<String, Drawable?>?
-        get() {
-            return context?.run {
-                getString(R.string.about_title) to
-                    ContextCompat.getDrawable(this, R.drawable.ic_all_about_24dp)
-            }
-        }
+        get() = context?.run { getString(R.string.about_title) to getCompatDrawable(R.drawable.ic_all_about) }
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.fragment_more, container, false)
@@ -95,7 +74,7 @@ class MoreFragment : BaseFragment(), MoreView, MainView.TitledView, MainView.Mai
     }
 
     override fun initView() {
-        moreAdapter.run { setOnItemClickListener { presenter.onItemSelected(it) } }
+        moreAdapter.setOnItemClickListener { presenter.onItemSelected(it) }
 
         moreRecycler.apply {
             layoutManager = SmoothScrollLinearLayoutManager(context)
@@ -104,7 +83,7 @@ class MoreFragment : BaseFragment(), MoreView, MainView.TitledView, MainView.Mai
     }
 
     override fun onFragmentReselected() {
-        presenter.onViewReselected()
+        if (::presenter.isInitialized) presenter.onViewReselected()
     }
 
     override fun updateData(data: List<MoreItem>) {
@@ -127,6 +106,14 @@ class MoreFragment : BaseFragment(), MoreView, MainView.TitledView, MainView.Mai
         (activity as? MainActivity)?.pushView(LuckyNumberFragment.newInstance())
     }
 
+    override fun openMobileDevicesView() {
+        (activity as? MainActivity)?.pushView(MobileDeviceFragment.newInstance())
+    }
+
+    override fun openSchoolAndTeachersView() {
+        (activity as? MainActivity)?.pushView(SchoolAndTeachersFragment.newInstance())
+    }
+
     override fun openSettingsView() {
         (activity as? MainActivity)?.pushView(SettingsFragment.newInstance())
     }
@@ -135,8 +122,8 @@ class MoreFragment : BaseFragment(), MoreView, MainView.TitledView, MainView.Mai
         (activity as? MainActivity)?.pushView(AboutFragment.newInstance())
     }
 
-    override fun popView() {
-        (activity as? MainActivity)?.popView()
+    override fun popView(depth: Int) {
+        (activity as? MainActivity)?.popView(depth)
     }
 
     override fun onDestroyView() {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/more/MorePresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/more/MorePresenter.kt
index 5fea241c7..096f89e9b 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/more/MorePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/more/MorePresenter.kt
@@ -1,39 +1,46 @@
 package io.github.wulkanowy.ui.modules.more
 
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.SchedulersProvider
 import timber.log.Timber
 import javax.inject.Inject
 
-class MorePresenter @Inject constructor(errorHandler: ErrorHandler) : BasePresenter<MoreView>(errorHandler) {
+class MorePresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository
+) : BasePresenter<MoreView>(errorHandler, studentRepository, schedulers) {
 
     override fun onAttachView(view: MoreView) {
         super.onAttachView(view)
-        Timber.i("More view is attached")
         view.initView()
+        Timber.i("More view was initialized")
         loadData()
     }
 
     fun onItemSelected(item: AbstractFlexibleItem<*>?) {
-        if (item is MoreItem) {
-            Timber.i("Select more item \"${item.title}\"")
-            view?.run {
-                when (item.title) {
-                    messagesRes?.first -> openMessagesView()
-                    homeworkRes?.first -> openHomeworkView()
-                    noteRes?.first -> openNoteView()
-                    luckyNumberRes?.first -> openLuckyNumberView()
-                    settingsRes?.first -> openSettingsView()
-                    aboutRes?.first -> openAboutView()
-                }
+        if (item !is MoreItem) return
+        Timber.i("Select more item \"${item.title}\"")
+        view?.run {
+            when (item.title) {
+                messagesRes?.first -> openMessagesView()
+                homeworkRes?.first -> openHomeworkView()
+                noteRes?.first -> openNoteView()
+                luckyNumberRes?.first -> openLuckyNumberView()
+                mobileDevicesRes?.first -> openMobileDevicesView()
+                schoolAndTeachersRes?.first -> openSchoolAndTeachersView()
+                settingsRes?.first -> openSettingsView()
+                aboutRes?.first -> openAboutView()
             }
         }
     }
 
     fun onViewReselected() {
         Timber.i("More view is reselected")
-        view?.popView()
+        view?.popView(2)
     }
 
     private fun loadData() {
@@ -44,6 +51,8 @@ class MorePresenter @Inject constructor(errorHandler: ErrorHandler) : BasePresen
                 homeworkRes?.let { MoreItem(it.first, it.second) },
                 noteRes?.let { MoreItem(it.first, it.second) },
                 luckyNumberRes?.let { MoreItem(it.first, it.second) },
+                mobileDevicesRes?.let { MoreItem(it.first, it.second) },
+                schoolAndTeachersRes?.let { MoreItem(it.first, it.second) },
                 settingsRes?.let { MoreItem(it.first, it.second) },
                 aboutRes?.let { MoreItem(it.first, it.second) })
             )
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/more/MoreView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/more/MoreView.kt
index 333edc5df..41008176d 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/more/MoreView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/more/MoreView.kt
@@ -13,6 +13,10 @@ interface MoreView : BaseView {
 
     val luckyNumberRes: Pair<String, Drawable?>?
 
+    val mobileDevicesRes: Pair<String, Drawable?>?
+
+    val schoolAndTeachersRes: Pair<String, Drawable?>?
+
     val settingsRes: Pair<String, Drawable?>?
 
     val aboutRes: Pair<String, Drawable?>?
@@ -25,7 +29,7 @@ interface MoreView : BaseView {
 
     fun openAboutView()
 
-    fun popView()
+    fun popView(depth: Int)
 
     fun openMessagesView()
 
@@ -34,4 +38,8 @@ interface MoreView : BaseView {
     fun openNoteView()
 
     fun openLuckyNumberView()
+
+    fun openMobileDevicesView()
+
+    fun openSchoolAndTeachersView()
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/note/NoteFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/note/NoteFragment.kt
index fc773e10b..e5335e459 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/note/NoteFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/note/NoteFragment.kt
@@ -12,14 +12,14 @@ import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Note
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_note.*
 import javax.inject.Inject
 
-class NoteFragment : BaseSessionFragment(), NoteView, MainView.TitledView {
+class NoteFragment : BaseFragment(), NoteView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: NotePresenter
@@ -60,6 +60,8 @@ class NoteFragment : BaseSessionFragment(), NoteView, MainView.TitledView {
             )
         }
         noteSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+        noteErrorRetry.setOnClickListener { presenter.onRetry() }
+        noteErrorDetails.setOnClickListener { presenter.onDetailsClick() }
     }
 
     override fun showNoteDialog(note: Note) {
@@ -82,6 +84,14 @@ class NoteFragment : BaseSessionFragment(), NoteView, MainView.TitledView {
         noteEmpty.visibility = if (show) VISIBLE else GONE
     }
 
+    override fun showErrorView(show: Boolean) {
+        noteError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        noteErrorMessage.text = message
+    }
+
     override fun showProgress(show: Boolean) {
         noteProgress.visibility = if (show) VISIBLE else GONE
     }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/note/NotePresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/note/NotePresenter.kt
index 32e2a4adf..7acf37a4c 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/note/NotePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/note/NotePresenter.kt
@@ -5,26 +5,29 @@ import io.github.wulkanowy.data.db.entities.Note
 import io.github.wulkanowy.data.repositories.note.NoteRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import timber.log.Timber
 import javax.inject.Inject
 
 class NotePresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
-    private val studentRepository: StudentRepository,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val noteRepository: NoteRepository,
     private val semesterRepository: SemesterRepository,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<NoteView>(errorHandler) {
+) : BasePresenter<NoteView>(errorHandler, studentRepository, schedulers) {
+
+    private lateinit var lastError: Throwable
 
     override fun onAttachView(view: NoteView) {
         super.onAttachView(view)
-        Timber.i("Note view is attached")
         view.initView()
+        Timber.i("Note view was initialized")
+        errorHandler.showErrorMessage = ::showErrorViewOnError
         loadData()
     }
 
@@ -33,6 +36,18 @@ class NotePresenter @Inject constructor(
         loadData(true)
     }
 
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(true)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
     private fun loadData(forceRefresh: Boolean = false) {
         Timber.i("Loading note data started")
         disposable.add(studentRepository.getCurrentStudent()
@@ -53,17 +68,28 @@ class NotePresenter @Inject constructor(
                 view?.apply {
                     updateData(it)
                     showEmpty(it.isEmpty())
+                    showErrorView(false)
                     showContent(it.isNotEmpty())
                 }
                 analytics.logEvent("load_note", "items" to it.size, "force_refresh" to forceRefresh)
             }, {
                 Timber.i("Loading note result: An exception occurred")
-                view?.run { showEmpty(isViewEmpty) }
                 errorHandler.dispatch(it)
             })
         )
     }
 
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
+
     fun onNoteItemSelected(item: AbstractFlexibleItem<*>?) {
         if (item is NoteItem) {
             Timber.i("Select note item ${item.note.id}")
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/note/NoteView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/note/NoteView.kt
index 38e6c94fd..a9c9f4f2f 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/note/NoteView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/note/NoteView.kt
@@ -2,9 +2,9 @@ package io.github.wulkanowy.ui.modules.note
 
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.db.entities.Note
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
 
-interface NoteView : BaseSessionView {
+interface NoteView : BaseView {
 
     val isViewEmpty: Boolean
 
@@ -18,6 +18,10 @@ interface NoteView : BaseSessionView {
 
     fun showEmpty(show: Boolean)
 
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
     fun showProgress(show: Boolean)
 
     fun enableSwipe(enable: Boolean)
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersChildView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersChildView.kt
new file mode 100644
index 000000000..b5eedb6fd
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersChildView.kt
@@ -0,0 +1,8 @@
+package io.github.wulkanowy.ui.modules.schoolandteachers
+
+interface SchoolAndTeachersChildView {
+
+    fun notifyParentDataLoaded()
+
+    fun onParentLoadData(forceRefresh: Boolean)
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersFragment.kt
new file mode 100644
index 000000000..5f9c0b9a0
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersFragment.kt
@@ -0,0 +1,87 @@
+package io.github.wulkanowy.ui.modules.schoolandteachers
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.INVISIBLE
+import android.view.View.VISIBLE
+import android.view.ViewGroup
+import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.base.BaseFragment
+import io.github.wulkanowy.ui.base.BaseFragmentPagerAdapter
+import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.ui.modules.schoolandteachers.school.SchoolFragment
+import io.github.wulkanowy.ui.modules.schoolandteachers.teacher.TeacherFragment
+import io.github.wulkanowy.utils.dpToPx
+import io.github.wulkanowy.utils.setOnSelectPageListener
+import kotlinx.android.synthetic.main.fragment_schoolandteachers.*
+import javax.inject.Inject
+
+class SchoolAndTeachersFragment : BaseFragment(), SchoolAndTeachersView, MainView.TitledView {
+
+    @Inject
+    lateinit var presenter: SchoolAndTeachersPresenter
+
+    @Inject
+    lateinit var pagerAdapter: BaseFragmentPagerAdapter
+
+    companion object {
+        fun newInstance() = SchoolAndTeachersFragment()
+    }
+
+    override val titleStringId: Int get() = R.string.schoolandteachers_title
+
+    override val currentPageIndex get() = schoolandteachersViewPager.currentItem
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.fragment_schoolandteachers, container, false)
+    }
+
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        presenter.onAttachView(this)
+    }
+
+    override fun initView() {
+        with(pagerAdapter) {
+            containerId = schoolandteachersViewPager.id
+            addFragmentsWithTitle(mapOf(
+                SchoolFragment.newInstance() to getString(R.string.school_title),
+                TeacherFragment.newInstance() to getString(R.string.teachers_title)
+            ))
+        }
+
+        with(schoolandteachersViewPager) {
+            adapter = pagerAdapter
+            offscreenPageLimit = 2
+            setOnSelectPageListener(presenter::onPageSelected)
+        }
+
+        with(schoolandteachersTabLayout) {
+            setupWithViewPager(schoolandteachersViewPager)
+            setElevationCompat(context.dpToPx(4f))
+        }
+    }
+
+    override fun showContent(show: Boolean) {
+        schoolandteachersViewPager.visibility = if (show) VISIBLE else INVISIBLE
+        schoolandteachersTabLayout.visibility = if (show) VISIBLE else INVISIBLE
+    }
+
+    override fun showProgress(show: Boolean) {
+        schoolandteachersProgress.visibility = if (show) VISIBLE else INVISIBLE
+    }
+
+    fun onChildFragmentLoaded() {
+        presenter.onChildViewLoaded()
+    }
+
+    override fun notifyChildLoadData(index: Int, forceRefresh: Boolean) {
+        (pagerAdapter.getFragmentInstance(index) as? SchoolAndTeachersChildView)?.onParentLoadData(forceRefresh)
+    }
+
+    override fun onDestroyView() {
+        presenter.onDetachView()
+        super.onDestroyView()
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersModule.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersModule.kt
new file mode 100644
index 000000000..62803a28c
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersModule.kt
@@ -0,0 +1,31 @@
+package io.github.wulkanowy.ui.modules.schoolandteachers
+
+import dagger.Module
+import dagger.Provides
+import dagger.android.ContributesAndroidInjector
+import io.github.wulkanowy.di.scopes.PerChildFragment
+import io.github.wulkanowy.di.scopes.PerFragment
+import io.github.wulkanowy.ui.base.BaseFragmentPagerAdapter
+import io.github.wulkanowy.ui.modules.schoolandteachers.school.SchoolFragment
+import io.github.wulkanowy.ui.modules.schoolandteachers.teacher.TeacherFragment
+
+@Suppress("unused")
+@Module(includes = [SchoolAndTeachersModule.Static::class])
+abstract class SchoolAndTeachersModule {
+
+    @Module
+    object Static {
+
+        @PerFragment
+        @Provides
+        fun provideSchoolAndTeachersAdapter(fragment: SchoolAndTeachersFragment) = BaseFragmentPagerAdapter(fragment.childFragmentManager)
+    }
+
+    @PerChildFragment
+    @ContributesAndroidInjector
+    abstract fun provideSchoolFragment(): SchoolFragment
+
+    @PerChildFragment
+    @ContributesAndroidInjector
+    abstract fun provideTeacherFragment(): TeacherFragment
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersPresenter.kt
new file mode 100644
index 000000000..1856803c6
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersPresenter.kt
@@ -0,0 +1,47 @@
+package io.github.wulkanowy.ui.modules.schoolandteachers
+
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.SchedulersProvider
+import io.reactivex.Completable
+import timber.log.Timber
+import java.util.concurrent.TimeUnit
+import javax.inject.Inject
+
+class SchoolAndTeachersPresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository
+) : BasePresenter<SchoolAndTeachersView>(errorHandler, studentRepository, schedulers) {
+
+    override fun onAttachView(view: SchoolAndTeachersView) {
+        super.onAttachView(view)
+        disposable.add(Completable.timer(150, TimeUnit.MILLISECONDS, schedulers.mainThread)
+            .subscribe {
+                view.initView()
+                Timber.i("Message view was initialized")
+                loadData()
+            })
+    }
+
+    fun onPageSelected(index: Int) {
+        loadChild(index)
+    }
+
+    private fun loadData() {
+        view?.run { loadChild(currentPageIndex) }
+    }
+
+    private fun loadChild(index: Int, forceRefresh: Boolean = false) {
+        Timber.i("Load schoolandteachers child view index: $index")
+        view?.notifyChildLoadData(index, forceRefresh)
+    }
+
+    fun onChildViewLoaded() {
+        view?.apply {
+            showContent(true)
+            showProgress(false)
+        }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersView.kt
new file mode 100644
index 000000000..594441ec7
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/SchoolAndTeachersView.kt
@@ -0,0 +1,16 @@
+package io.github.wulkanowy.ui.modules.schoolandteachers
+
+import io.github.wulkanowy.ui.base.BaseView
+
+interface SchoolAndTeachersView : BaseView {
+
+    val currentPageIndex: Int
+
+    fun initView()
+
+    fun showContent(show: Boolean)
+
+    fun showProgress(show: Boolean)
+
+    fun notifyChildLoadData(index: Int, forceRefresh: Boolean)
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/school/SchoolFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/school/SchoolFragment.kt
new file mode 100644
index 000000000..5a7c4cade
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/school/SchoolFragment.kt
@@ -0,0 +1,109 @@
+package io.github.wulkanowy.ui.modules.schoolandteachers.school
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.view.ViewGroup
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.School
+import io.github.wulkanowy.ui.base.BaseFragment
+import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.ui.modules.schoolandteachers.SchoolAndTeachersChildView
+import io.github.wulkanowy.ui.modules.schoolandteachers.SchoolAndTeachersFragment
+import io.github.wulkanowy.utils.openDialer
+import io.github.wulkanowy.utils.openNavigation
+import kotlinx.android.synthetic.main.fragment_school.*
+import javax.inject.Inject
+
+class SchoolFragment : BaseFragment(), SchoolView, MainView.TitledView, SchoolAndTeachersChildView {
+
+    @Inject
+    lateinit var presenter: SchoolPresenter
+
+    override val titleStringId get() = R.string.school_title
+
+    override val isViewEmpty get() = schoolName.text.isBlank()
+
+    companion object {
+        fun newInstance() = SchoolFragment()
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.fragment_school, container, false)
+    }
+
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        presenter.onAttachView(this)
+    }
+
+    override fun initView() {
+        schoolSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+        schoolErrorRetry.setOnClickListener { presenter.onRetry() }
+        schoolErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+
+        schoolAddressButton.setOnClickListener { presenter.onAddressSelected() }
+        schoolTelephoneButton.setOnClickListener { presenter.onTelephoneSelected() }
+    }
+
+    override fun updateData(data: School) {
+        schoolName.text = data.name
+        schoolAddress.text = data.address.ifBlank { "-" }
+        schoolAddressButton.visibility = if (data.address.isNotBlank()) VISIBLE else GONE
+        schoolTelephone.text = data.contact.ifBlank { "-" }
+        schoolTelephoneButton.visibility = if (data.contact.isNotBlank()) VISIBLE else GONE
+        schoolHeadmaster.text = data.headmaster
+        schoolPedagogue.text = data.pedagogue
+    }
+
+    override fun showEmpty(show: Boolean) {
+        schoolEmpty.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun showErrorView(show: Boolean) {
+        schoolError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        schoolErrorMessage.text = message
+    }
+
+    override fun showProgress(show: Boolean) {
+        schoolProgress.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun enableSwipe(enable: Boolean) {
+        schoolSwipe.isEnabled = enable
+    }
+
+    override fun showContent(show: Boolean) {
+        schoolContent.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun hideRefresh() {
+        schoolSwipe.isRefreshing = false
+    }
+
+    override fun notifyParentDataLoaded() {
+        (parentFragment as? SchoolAndTeachersFragment)?.onChildFragmentLoaded()
+    }
+
+    override fun onParentLoadData(forceRefresh: Boolean) {
+        presenter.onParentViewLoadData(forceRefresh)
+    }
+
+    override fun onDestroyView() {
+        presenter.onDetachView()
+        super.onDestroyView()
+    }
+
+    override fun openMapsLocation(location: String) {
+        context?.openNavigation(location)
+    }
+
+    override fun dialPhone(phone: String) {
+        context?.openDialer(phone)
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/school/SchoolPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/school/SchoolPresenter.kt
new file mode 100644
index 000000000..d3299d90d
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/school/SchoolPresenter.kt
@@ -0,0 +1,113 @@
+package io.github.wulkanowy.ui.modules.schoolandteachers.school
+
+import io.github.wulkanowy.data.repositories.school.SchoolRepository
+import io.github.wulkanowy.data.repositories.semester.SemesterRepository
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
+import timber.log.Timber
+import javax.inject.Inject
+
+class SchoolPresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
+    private val semesterRepository: SemesterRepository,
+    private val schoolRepository: SchoolRepository,
+    private val analytics: FirebaseAnalyticsHelper
+) : BasePresenter<SchoolView>(errorHandler, studentRepository, schedulers) {
+
+    private var address: String? = null
+
+    private var contact: String? = null
+
+    private lateinit var lastError: Throwable
+
+    override fun onAttachView(view: SchoolView) {
+        super.onAttachView(view)
+        view.initView()
+        Timber.i("School view was initialized")
+        errorHandler.showErrorMessage = ::showErrorViewOnError
+        loadData()
+    }
+
+    fun onSwipeRefresh() {
+        loadData(true)
+    }
+
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(true)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
+    fun onParentViewLoadData(forceRefresh: Boolean) {
+        loadData(forceRefresh)
+    }
+
+    fun onAddressSelected() {
+        address?.let { view?.openMapsLocation(it) }
+    }
+
+    fun onTelephoneSelected() {
+        contact?.let { view?.dialPhone(it) }
+    }
+
+    private fun loadData(forceRefresh: Boolean = false) {
+        Timber.i("Loading school info started")
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .flatMapMaybe { schoolRepository.getSchoolInfo(it, forceRefresh) }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doFinally {
+                view?.run {
+                    hideRefresh()
+                    showProgress(false)
+                    enableSwipe(true)
+                    notifyParentDataLoaded()
+                }
+            }.subscribe({
+                Timber.i("Loading teachers result: Success")
+                view?.run {
+                    address = it.address.ifBlank { null }
+                    contact = it.contact.ifBlank { null }
+                    updateData(it)
+                    showContent(true)
+                    showEmpty(false)
+                    showErrorView(false)
+                }
+                analytics.logEvent("load_school", "force_refresh" to forceRefresh)
+            }, {
+                Timber.i("Loading school result: An exception occurred")
+                errorHandler.dispatch(it)
+            }, {
+                Timber.i("Loading school result: No school info found")
+                view?.run {
+                    showContent(!isViewEmpty)
+                    showEmpty(isViewEmpty)
+                    showErrorView(false)
+                }
+            }))
+    }
+
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+                showContent(false)
+            } else showError(message, error)
+        }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/school/SchoolView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/school/SchoolView.kt
new file mode 100644
index 000000000..c42c2f91b
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/school/SchoolView.kt
@@ -0,0 +1,32 @@
+package io.github.wulkanowy.ui.modules.schoolandteachers.school
+
+import io.github.wulkanowy.data.db.entities.School
+import io.github.wulkanowy.ui.base.BaseView
+import io.github.wulkanowy.ui.modules.schoolandteachers.SchoolAndTeachersChildView
+
+interface SchoolView : BaseView, SchoolAndTeachersChildView {
+
+    val isViewEmpty: Boolean
+
+    fun initView()
+
+    fun updateData(data: School)
+
+    fun showEmpty(show: Boolean)
+
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
+    fun showProgress(show: Boolean)
+
+    fun enableSwipe(enable: Boolean)
+
+    fun showContent(show: Boolean)
+
+    fun hideRefresh()
+
+    fun openMapsLocation(location: String)
+
+    fun dialPhone(phone: String)
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/teacher/TeacherFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/teacher/TeacherFragment.kt
new file mode 100644
index 000000000..b6bb9c101
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/teacher/TeacherFragment.kt
@@ -0,0 +1,117 @@
+package io.github.wulkanowy.ui.modules.schoolandteachers.teacher
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.view.ViewGroup
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.common.FlexibleItemDecoration
+import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.base.BaseFragment
+import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.ui.modules.schoolandteachers.SchoolAndTeachersChildView
+import io.github.wulkanowy.ui.modules.schoolandteachers.SchoolAndTeachersFragment
+import kotlinx.android.synthetic.main.fragment_teacher.*
+import javax.inject.Inject
+
+class TeacherFragment : BaseFragment(), TeacherView, MainView.TitledView,
+    SchoolAndTeachersChildView {
+
+    @Inject
+    lateinit var presenter: TeacherPresenter
+
+    @Inject
+    lateinit var teacherAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+
+    companion object {
+        fun newInstance() = TeacherFragment()
+    }
+
+    override val titleStringId: Int
+        get() = R.string.teachers_title
+
+    override val noSubjectString get() = getString(R.string.teacher_no_subject)
+
+    override val isViewEmpty: Boolean
+        get() = teacherAdapter.isEmpty
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.fragment_teacher, container, false)
+    }
+
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        presenter.onAttachView(this)
+    }
+
+    override fun initView() {
+        teacherRecycler.run {
+            layoutManager = SmoothScrollLinearLayoutManager(context)
+            adapter = teacherAdapter
+            addItemDecoration(FlexibleItemDecoration(context)
+                .withDefaultDivider()
+                .withDrawDividerOnLastItem(false)
+            )
+        }
+        teacherSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+        teacherErrorRetry.setOnClickListener { presenter.onRetry() }
+        teacherErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+    }
+
+    override fun updateData(data: List<TeacherItem>) {
+        teacherAdapter.updateDataSet(data, true)
+    }
+
+    override fun updateItem(item: AbstractFlexibleItem<*>) {
+        teacherAdapter.updateItem(item)
+    }
+
+    override fun clearData() {
+        teacherAdapter.clear()
+    }
+
+    override fun showEmpty(show: Boolean) {
+        teacherEmpty.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun showErrorView(show: Boolean) {
+        teacherError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        teacherErrorMessage.text = message
+    }
+
+    override fun showProgress(show: Boolean) {
+        teacherProgress.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun enableSwipe(enable: Boolean) {
+        teacherSwipe.isEnabled = enable
+    }
+
+    override fun showContent(show: Boolean) {
+        teacherRecycler.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun hideRefresh() {
+        teacherSwipe.isRefreshing = false
+    }
+
+    override fun notifyParentDataLoaded() {
+        (parentFragment as? SchoolAndTeachersFragment)?.onChildFragmentLoaded()
+    }
+
+    override fun onParentLoadData(forceRefresh: Boolean) {
+        presenter.onParentViewLoadData(forceRefresh)
+    }
+
+    override fun onDestroyView() {
+        presenter.onDetachView()
+        super.onDestroyView()
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/teacher/TeacherItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/teacher/TeacherItem.kt
new file mode 100644
index 000000000..368317744
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/teacher/TeacherItem.kt
@@ -0,0 +1,59 @@
+package io.github.wulkanowy.ui.modules.schoolandteachers.teacher
+
+import android.annotation.SuppressLint
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import eu.davidea.flexibleadapter.items.IFlexible
+import eu.davidea.viewholders.FlexibleViewHolder
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.Teacher
+import kotlinx.android.extensions.LayoutContainer
+import kotlinx.android.synthetic.main.item_teacher.*
+
+class TeacherItem(val teacher: Teacher, private val noSubjectText: String) : AbstractFlexibleItem<TeacherItem.ViewHolder>() {
+
+    override fun getLayoutRes() = R.layout.item_teacher
+
+    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>): TeacherItem.ViewHolder {
+        return TeacherItem.ViewHolder(view, adapter)
+    }
+
+    @SuppressLint("SetTextI18n")
+    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: TeacherItem.ViewHolder, position: Int, payloads: MutableList<Any>?) {
+        holder.apply {
+            teacherItemName.text = teacher.name
+            teacherItemSubject.text = if (teacher.subject.isNotBlank()) teacher.subject else noSubjectText
+            if (teacher.shortName.isNotBlank()) {
+                teacherItemShortName.visibility = VISIBLE
+                teacherItemShortName.text = "[${teacher.shortName}]"
+            } else {
+                teacherItemShortName.visibility = GONE
+            }
+        }
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as TeacherItem
+
+        if (teacher != other.teacher) return false
+        if (teacher.id != other.teacher.id) return false
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = teacher.hashCode()
+        result = 31 * result + teacher.id.toInt()
+        return result
+    }
+
+    class ViewHolder(val view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter), LayoutContainer {
+        override val containerView: View
+            get() = contentView
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/teacher/TeacherPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/teacher/TeacherPresenter.kt
new file mode 100644
index 000000000..6aa4871d2
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/teacher/TeacherPresenter.kt
@@ -0,0 +1,93 @@
+package io.github.wulkanowy.ui.modules.schoolandteachers.teacher
+
+import io.github.wulkanowy.data.repositories.semester.SemesterRepository
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.data.repositories.teacher.TeacherRepository
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
+import timber.log.Timber
+import javax.inject.Inject
+
+class TeacherPresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
+    private val semesterRepository: SemesterRepository,
+    private val teacherRepository: TeacherRepository,
+    private val analytics: FirebaseAnalyticsHelper
+) : BasePresenter<TeacherView>(errorHandler, studentRepository, schedulers) {
+
+    private lateinit var lastError: Throwable
+
+    override fun onAttachView(view: TeacherView) {
+        super.onAttachView(view)
+        view.initView()
+        Timber.i("Teacher view was initialized")
+        errorHandler.showErrorMessage = ::showErrorViewOnError
+        loadData()
+    }
+
+    fun onSwipeRefresh() {
+        loadData(true)
+    }
+
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(true)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
+    fun onParentViewLoadData(forceRefresh: Boolean) {
+        loadData(forceRefresh)
+    }
+
+    private fun loadData(forceRefresh: Boolean = false) {
+        Timber.i("Loading teachers data started")
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .flatMap { teacherRepository.getTeachers(it, forceRefresh) }
+            .map { it.filter { teacher -> teacher.name.isNotBlank() } }
+            .map { items -> items.map { TeacherItem(it, view?.noSubjectString.orEmpty()) } }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doFinally {
+                view?.run {
+                    hideRefresh()
+                    showProgress(false)
+                    enableSwipe(true)
+                    notifyParentDataLoaded()
+                }
+            }.subscribe({
+                Timber.i("Loading teachers result: Success")
+                view?.run {
+                    updateData(it)
+                    showContent(it.isNotEmpty())
+                    showEmpty(it.isEmpty())
+                    showErrorView(false)
+                }
+                analytics.logEvent("load_teachers", "items" to it.size, "force_refresh" to forceRefresh)
+            }) {
+                Timber.i("Loading teachers result: An exception occurred")
+                errorHandler.dispatch(it)
+            })
+    }
+
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/teacher/TeacherView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/teacher/TeacherView.kt
new file mode 100644
index 000000000..b16be8ff9
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/schoolandteachers/teacher/TeacherView.kt
@@ -0,0 +1,34 @@
+package io.github.wulkanowy.ui.modules.schoolandteachers.teacher
+
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.ui.base.BaseView
+import io.github.wulkanowy.ui.modules.schoolandteachers.SchoolAndTeachersChildView
+
+interface TeacherView : BaseView, SchoolAndTeachersChildView {
+
+    val isViewEmpty: Boolean
+
+    val noSubjectString: String
+
+    fun initView()
+
+    fun updateData(data: List<TeacherItem>)
+
+    fun updateItem(item: AbstractFlexibleItem<*>)
+
+    fun hideRefresh()
+
+    fun clearData()
+
+    fun showProgress(show: Boolean)
+
+    fun enableSwipe(enable: Boolean)
+
+    fun showContent(show: Boolean)
+
+    fun showEmpty(show: Boolean)
+
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/settings/SettingsFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/settings/SettingsFragment.kt
index d82eaba7e..03a89d274 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/settings/SettingsFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/settings/SettingsFragment.kt
@@ -3,27 +3,35 @@ package io.github.wulkanowy.ui.modules.settings
 import android.content.Context
 import android.content.SharedPreferences
 import android.os.Bundle
-import androidx.appcompat.app.AppCompatDelegate
-import com.takisoft.preferencex.PreferenceFragmentCompat
+import androidx.preference.Preference
+import androidx.preference.PreferenceFragmentCompat
+import com.yariksoffice.lingver.Lingver
 import dagger.android.support.AndroidSupportInjection
-import io.github.wulkanowy.BuildConfig.DEBUG
 import io.github.wulkanowy.R
 import io.github.wulkanowy.ui.base.BaseActivity
+import io.github.wulkanowy.ui.base.ErrorDialog
 import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.utils.AppInfo
 import javax.inject.Inject
 
-class SettingsFragment : PreferenceFragmentCompat(), SharedPreferences.OnSharedPreferenceChangeListener,
+class SettingsFragment : PreferenceFragmentCompat(),
+    SharedPreferences.OnSharedPreferenceChangeListener,
     MainView.TitledView, SettingsView {
 
     @Inject
     lateinit var presenter: SettingsPresenter
 
+    @Inject
+    lateinit var appInfo: AppInfo
+
+    @Inject
+    lateinit var lingver: Lingver
+
     companion object {
         fun newInstance() = SettingsFragment()
     }
 
-    override val titleStringId: Int
-        get() = R.string.settings_title
+    override val titleStringId get() = R.string.settings_title
 
     override fun onAttach(context: Context) {
         AndroidSupportInjection.inject(this)
@@ -35,33 +43,48 @@ class SettingsFragment : PreferenceFragmentCompat(), SharedPreferences.OnSharedP
         presenter.onAttachView(this)
     }
 
-    override fun onCreatePreferencesFix(savedInstanceState: Bundle?, rootKey: String?) {
-        addPreferencesFromResource(R.xml.scheme_preferences)
-        findPreference(getString(R.string.pref_key_notification_debug)).isVisible = DEBUG
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        setPreferencesFromResource(R.xml.scheme_preferences, rootKey)
+        findPreference<Preference>(getString(R.string.pref_key_notification_debug))?.isVisible = appInfo.isDebug
     }
 
     override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences, key: String) {
         presenter.onSharedPreferenceChanged(key)
     }
 
-    override fun setTheme(theme: Int) {
-        AppCompatDelegate.setDefaultNightMode(theme)
+    override fun recreateView() {
         activity?.recreate()
     }
 
+    override fun updateLanguage(langCode: String) {
+        lingver.setLocale(requireContext(), langCode)
+    }
+
     override fun setServicesSuspended(serviceEnablesKey: String, isHolidays: Boolean) {
-        findPreference(serviceEnablesKey).run {
+        findPreference<Preference>(serviceEnablesKey)?.apply {
             summary = if (isHolidays) getString(R.string.pref_services_suspended) else ""
             isEnabled = !isHolidays
         }
     }
 
     override fun showError(text: String, error: Throwable) {
-        (activity as? BaseActivity)?.showError(text, error)
+        (activity as? BaseActivity<*>)?.showError(text, error)
     }
 
     override fun showMessage(text: String) {
-        (activity as? BaseActivity)?.showMessage(text)
+        (activity as? BaseActivity<*>)?.showMessage(text)
+    }
+
+    override fun showExpiredDialog() {
+        (activity as? BaseActivity<*>)?.showExpiredDialog()
+    }
+
+    override fun openClearLoginView() {
+        (activity as? BaseActivity<*>)?.openClearLoginView()
+    }
+
+    override fun showErrorDetailsDialog(error: Throwable) {
+        ErrorDialog.newInstance(error).show(childFragmentManager, error.toString())
     }
 
     override fun onResume() {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/settings/SettingsPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/settings/SettingsPresenter.kt
index 65e871ea3..89ba0ee5e 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/settings/SettingsPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/settings/SettingsPresenter.kt
@@ -2,37 +2,49 @@ package io.github.wulkanowy.ui.modules.settings
 
 import com.readystatesoftware.chuck.api.ChuckCollector
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
+import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.services.sync.SyncManager
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.AppInfo
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
 import io.github.wulkanowy.utils.isHolidays
 import org.threeten.bp.LocalDate.now
 import timber.log.Timber
 import javax.inject.Inject
 
 class SettingsPresenter @Inject constructor(
+    schedulers: SchedulersProvider,
     errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val preferencesRepository: PreferencesRepository,
     private val analytics: FirebaseAnalyticsHelper,
     private val syncManager: SyncManager,
-    private val chuckCollector: ChuckCollector
-) : BasePresenter<SettingsView>(errorHandler) {
+    private val chuckCollector: ChuckCollector,
+    private val appInfo: AppInfo
+) : BasePresenter<SettingsView>(errorHandler, studentRepository, schedulers) {
 
     override fun onAttachView(view: SettingsView) {
         super.onAttachView(view)
-        Timber.i("Settings view is attached")
+        Timber.i("Settings view was initialized")
         view.setServicesSuspended(preferencesRepository.serviceEnableKey, now().isHolidays)
     }
 
     fun onSharedPreferenceChanged(key: String) {
         Timber.i("Change settings $key")
-        preferencesRepository.apply {
+
+        with(preferencesRepository) {
             when (key) {
-                serviceEnableKey -> syncManager.run { if (isServiceEnabled) startSyncWorker() else stopSyncWorker() }
+                serviceEnableKey -> with(syncManager) { if (isServiceEnabled) startSyncWorker() else stopSyncWorker() }
                 servicesIntervalKey, servicesOnlyWifiKey -> syncManager.startSyncWorker(true)
-                currentThemeKey -> view?.setTheme(currentTheme)
                 isDebugNotificationEnableKey -> chuckCollector.showNotification(isDebugNotificationEnable)
+                appThemeKey -> view?.recreateView()
+                appLanguageKey -> view?.run {
+                    updateLanguage(if (appLanguage == "system") appInfo.systemLanguage else appLanguage)
+                    recreateView()
+                }
+                else -> Unit
             }
         }
         analytics.logEvent("setting_changed", "name" to key)
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/settings/SettingsView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/settings/SettingsView.kt
index 0b3c2f70c..e50eb47b3 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/settings/SettingsView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/settings/SettingsView.kt
@@ -4,7 +4,9 @@ import io.github.wulkanowy.ui.base.BaseView
 
 interface SettingsView : BaseView {
 
-    fun setTheme(theme: Int)
+    fun recreateView()
+
+    fun updateLanguage(langCode: String)
 
     fun setServicesSuspended(serviceEnablesKey: String, isHolidays: Boolean)
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/splash/SplashActivity.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/splash/SplashActivity.kt
index 2bd625332..3e0106d1a 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/splash/SplashActivity.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/splash/SplashActivity.kt
@@ -8,10 +8,10 @@ import io.github.wulkanowy.ui.modules.login.LoginActivity
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import javax.inject.Inject
 
-class SplashActivity : BaseActivity(), SplashView {
+class SplashActivity : BaseActivity<SplashPresenter>(), SplashView {
 
     @Inject
-    lateinit var presenter: SplashPresenter
+    override lateinit var presenter: SplashPresenter
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -31,9 +31,4 @@ class SplashActivity : BaseActivity(), SplashView {
     override fun showError(text: String, error: Throwable) {
         Toast.makeText(this, text, LENGTH_LONG).show()
     }
-
-    override fun onDestroy() {
-        presenter.onDetachView()
-        super.onDestroy()
-    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/splash/SplashPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/splash/SplashPresenter.kt
index b6bf0e2a3..44b53c5f9 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/splash/SplashPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/splash/SplashPresenter.kt
@@ -7,14 +7,14 @@ import io.github.wulkanowy.utils.SchedulersProvider
 import javax.inject.Inject
 
 class SplashPresenter @Inject constructor(
-    private val studentRepository: StudentRepository,
-    private val errorHandler: ErrorHandler,
-    private val schedulers: SchedulersProvider
-) : BasePresenter<SplashView>(errorHandler) {
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository
+) : BasePresenter<SplashView>(errorHandler, studentRepository, schedulers) {
 
     override fun onAttachView(view: SplashView) {
         super.onAttachView(view)
-        disposable.add(studentRepository.isStudentSaved()
+        disposable.add(studentRepository.isCurrentStudentSet()
             .subscribeOn(schedulers.backgroundThread)
             .observeOn(schedulers.mainThread)
             .subscribe({
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableDialog.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableDialog.kt
index 7e286c923..57ec5998d 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableDialog.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableDialog.kt
@@ -11,6 +11,7 @@ import android.view.ViewGroup
 import androidx.fragment.app.DialogFragment
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Timetable
+import io.github.wulkanowy.utils.getThemeAttrColor
 import io.github.wulkanowy.utils.toFormattedString
 import kotlinx.android.synthetic.main.dialog_timetable.*
 import org.threeten.bp.LocalDateTime
@@ -72,13 +73,22 @@ class TimetableDialog : DialogFragment() {
 
     private fun setInfo(info: String, teacher: String, canceled: Boolean, changes: Boolean) {
         when {
-            info.isNotBlank() -> timetableDialogChanges.text = when {
-                canceled && !changes -> "Lekcja odwołana: $info"
-                changes && teacher.isNotBlank() -> "Zastępstwo: $teacher"
-                changes && teacher.isBlank() -> "Zastępstwo, ${info.decapitalize()}"
-                else -> info.capitalize()
-            }
-            else -> {
+            info.isNotBlank() -> {
+                if (canceled) {
+                    timetableDialogChangesTitle.setTextColor(requireContext().getThemeAttrColor(R.attr.colorPrimary))
+                    timetableDialogChanges.setTextColor(requireContext().getThemeAttrColor(R.attr.colorPrimary))
+                } else {
+                    timetableDialogChangesTitle.setTextColor(requireContext().getThemeAttrColor(R.attr.colorTimetableChange))
+                    timetableDialogChanges.setTextColor(requireContext().getThemeAttrColor(R.attr.colorTimetableChange))
+                }
+
+                timetableDialogChanges.text = when {
+                    canceled && !changes -> "Lekcja odwołana: $info"
+                    changes && teacher.isNotBlank() -> "Zastępstwo: $teacher"
+                    changes && teacher.isBlank() -> "Zastępstwo, ${info.decapitalize()}"
+                    else -> info.capitalize()
+                }
+            } else -> {
                 timetableDialogChangesTitle.visibility = GONE
                 timetableDialogChanges.visibility = GONE
             }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableFragment.kt
index 3b1259f76..ef6057dfa 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableFragment.kt
@@ -6,22 +6,29 @@ import android.view.Menu
 import android.view.MenuInflater
 import android.view.MenuItem
 import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
 import android.view.ViewGroup
+import com.wdullaer.materialdatetimepicker.date.DatePickerDialog
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.FlexibleItemDecoration
 import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Timetable
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.ui.modules.timetable.completed.CompletedLessonsFragment
+import io.github.wulkanowy.utils.SchooldaysRangeLimiter
+import io.github.wulkanowy.utils.dpToPx
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_timetable.*
+import org.threeten.bp.LocalDate
 import javax.inject.Inject
 
-class TimetableFragment : BaseSessionFragment(), TimetableView, MainView.MainChildView, MainView.TitledView {
+class TimetableFragment : BaseFragment(), TimetableView, MainView.MainChildView,
+    MainView.TitledView {
 
     @Inject
     lateinit var presenter: TimetablePresenter
@@ -35,17 +42,11 @@ class TimetableFragment : BaseSessionFragment(), TimetableView, MainView.MainChi
         fun newInstance() = TimetableFragment()
     }
 
-    override val titleStringId: Int
-        get() = R.string.timetable_title
+    override val titleStringId get() = R.string.timetable_title
 
-    override val roomString: String
-        get() = getString(R.string.timetable_room)
+    override val isViewEmpty get() = timetableAdapter.isEmpty
 
-    override val isViewEmpty: Boolean
-        get() = timetableAdapter.isEmpty
-
-    override val currentStackSize: Int?
-        get() = (activity as? MainActivity)?.currentStackSize
+    override val currentStackSize get() = (activity as? MainActivity)?.currentStackSize
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -63,11 +64,9 @@ class TimetableFragment : BaseSessionFragment(), TimetableView, MainView.MainChi
     }
 
     override fun initView() {
-        timetableAdapter.run {
-            setOnItemClickListener { presenter.onTimetableItemSelected(it) }
-        }
+        timetableAdapter.setOnItemClickListener(presenter::onTimetableItemSelected)
 
-        timetableRecycler.run {
+        with(timetableRecycler) {
             layoutManager = SmoothScrollLinearLayoutManager(context)
             adapter = timetableAdapter
             addItemDecoration(FlexibleItemDecoration(context)
@@ -75,17 +74,24 @@ class TimetableFragment : BaseSessionFragment(), TimetableView, MainView.MainChi
                 .withDrawDividerOnLastItem(false)
             )
         }
-        timetableSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+
+        timetableSwipe.setOnRefreshListener(presenter::onSwipeRefresh)
+        timetableErrorRetry.setOnClickListener { presenter.onRetry() }
+        timetableErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+
         timetablePreviousButton.setOnClickListener { presenter.onPreviousDay() }
+        timetableNavDate.setOnClickListener { presenter.onPickDate() }
         timetableNextButton.setOnClickListener { presenter.onNextDay() }
+
+        timetableNavContainer.setElevationCompat(requireContext().dpToPx(8f))
     }
 
-    override fun onCreateOptionsMenu(menu: Menu?, inflater: MenuInflater?) {
-        inflater?.inflate(R.menu.action_menu_timetable, menu)
+    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
+        inflater.inflate(R.menu.action_menu_timetable, menu)
     }
 
-    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
-        return if (item?.itemId == R.id.timetableMenuCompletedLessons) presenter.onCompletedLessonsSwitchSelected()
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return if (item.itemId == R.id.timetableMenuCompletedLessons) presenter.onCompletedLessonsSwitchSelected()
         else false
     }
 
@@ -110,7 +116,7 @@ class TimetableFragment : BaseSessionFragment(), TimetableView, MainView.MainChi
     }
 
     override fun onFragmentReselected() {
-        presenter.onViewReselected()
+        if (::presenter.isInitialized) presenter.onViewReselected()
     }
 
     override fun popView() {
@@ -118,11 +124,19 @@ class TimetableFragment : BaseSessionFragment(), TimetableView, MainView.MainChi
     }
 
     override fun showEmpty(show: Boolean) {
-        timetableEmpty.visibility = if (show) View.VISIBLE else View.GONE
+        timetableEmpty.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun showErrorView(show: Boolean) {
+        timetableError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        timetableErrorMessage.text = message
     }
 
     override fun showProgress(show: Boolean) {
-        timetableProgress.visibility = if (show) View.VISIBLE else View.GONE
+        timetableProgress.visibility = if (show) VISIBLE else GONE
     }
 
     override fun enableSwipe(enable: Boolean) {
@@ -130,21 +144,36 @@ class TimetableFragment : BaseSessionFragment(), TimetableView, MainView.MainChi
     }
 
     override fun showContent(show: Boolean) {
-        timetableRecycler.visibility = if (show) View.VISIBLE else View.GONE
+        timetableRecycler.visibility = if (show) VISIBLE else GONE
     }
 
     override fun showPreButton(show: Boolean) {
-        timetablePreviousButton.visibility = if (show) View.VISIBLE else View.INVISIBLE
+        timetablePreviousButton.visibility = if (show) VISIBLE else View.INVISIBLE
     }
 
     override fun showNextButton(show: Boolean) {
-        timetableNextButton.visibility = if (show) View.VISIBLE else View.INVISIBLE
+        timetableNextButton.visibility = if (show) VISIBLE else View.INVISIBLE
     }
 
     override fun showTimetableDialog(lesson: Timetable) {
         (activity as? MainActivity)?.showDialogFragment(TimetableDialog.newInstance(lesson))
     }
 
+    override fun showDatePickerDialog(currentDate: LocalDate) {
+        val dateSetListener = DatePickerDialog.OnDateSetListener { _, year, month, dayOfMonth ->
+            presenter.onDateSet(year, month + 1, dayOfMonth)
+        }
+        val datePickerDialog = DatePickerDialog.newInstance(dateSetListener,
+            currentDate.year, currentDate.monthValue - 1, currentDate.dayOfMonth)
+
+        with(datePickerDialog) {
+            setDateRangeLimiter(SchooldaysRangeLimiter())
+            version = DatePickerDialog.Version.VERSION_2
+            scrollOrientation = DatePickerDialog.ScrollOrientation.VERTICAL
+            show(this@TimetableFragment.parentFragmentManager, null)
+        }
+    }
+
     override fun openCompletedLessonsView() {
         (activity as? MainActivity)?.pushView(CompletedLessonsFragment.newInstance())
     }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableItem.kt
index c721401f3..0991981df 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableItem.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableItem.kt
@@ -11,11 +11,12 @@ import eu.davidea.flexibleadapter.items.IFlexible
 import eu.davidea.viewholders.FlexibleViewHolder
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Timetable
+import io.github.wulkanowy.utils.getThemeAttrColor
 import io.github.wulkanowy.utils.toFormattedString
 import kotlinx.android.extensions.LayoutContainer
 import kotlinx.android.synthetic.main.item_timetable.*
 
-class TimetableItem(val lesson: Timetable, private val roomText: String) :
+class TimetableItem(val lesson: Timetable) :
     AbstractFlexibleItem<TimetableItem.ViewHolder>() {
 
     override fun getLayoutRes() = R.layout.item_timetable
@@ -26,16 +27,97 @@ class TimetableItem(val lesson: Timetable, private val roomText: String) :
 
     @SuppressLint("SetTextI18n")
     override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
-        holder.apply {
-            timetableItemNumber.text = lesson.number.toString()
-            timetableItemSubject.text = lesson.subject
-            timetableItemRoom.text = if (lesson.room.isNotBlank()) "$roomText ${lesson.room}" else ""
-            timetableItemTime.text = "${lesson.start.toFormattedString("HH:mm")} - ${lesson.end.toFormattedString("HH:mm")}"
-            timetableItemAlert.visibility = if (lesson.changes || lesson.canceled) VISIBLE else GONE
+        updateFields(holder)
+
+        with(holder) {
             timetableItemSubject.paintFlags =
                 if (lesson.canceled) timetableItemSubject.paintFlags or Paint.STRIKE_THRU_TEXT_FLAG
                 else timetableItemSubject.paintFlags and Paint.STRIKE_THRU_TEXT_FLAG.inv()
         }
+
+        updateDescription(holder)
+        updateColors(holder)
+    }
+
+    private fun updateFields(holder: ViewHolder) {
+        with(holder) {
+            timetableItemNumber.text = lesson.number.toString()
+            timetableItemSubject.text = lesson.subject
+            timetableItemRoom.text = lesson.room
+            timetableItemTeacher.text = lesson.teacher
+            timetableItemTimeStart.text = lesson.start.toFormattedString("HH:mm")
+            timetableItemTimeFinish.text = lesson.end.toFormattedString("HH:mm")
+        }
+    }
+
+    private fun updateDescription(holder: ViewHolder) {
+        with(holder) {
+            if (lesson.info.isNotBlank() && !lesson.changes) {
+                updateDescriptionNoChanges(this)
+            } else {
+                timetableItemDescription.visibility = GONE
+
+                timetableItemRoom.visibility = VISIBLE
+                timetableItemTeacher.visibility = VISIBLE
+            }
+        }
+    }
+
+    private fun updateDescriptionNoChanges(holder: ViewHolder) {
+        with(holder) {
+            timetableItemDescription.visibility = VISIBLE
+            timetableItemDescription.text = lesson.info
+
+            timetableItemRoom.visibility = GONE
+            timetableItemTeacher.visibility = GONE
+
+            timetableItemDescription.setTextColor(holder.view.context.getThemeAttrColor(
+                if (lesson.canceled) R.attr.colorPrimary
+                else R.attr.colorTimetableChange
+            ))
+        }
+    }
+
+    private fun updateColors(holder: ViewHolder) {
+        with(holder) {
+            if (lesson.canceled) {
+                timetableItemNumber.setTextColor(holder.view.context.getThemeAttrColor(R.attr.colorPrimary))
+                timetableItemSubject.setTextColor(holder.view.context.getThemeAttrColor(R.attr.colorPrimary))
+            } else {
+                updateNumberColor(this)
+                updateSubjectColor(this)
+                updateRoomColor(this)
+                updateTeacherColor(this)
+            }
+        }
+    }
+
+    private fun updateNumberColor(holder: ViewHolder) {
+        holder.timetableItemNumber.setTextColor(holder.view.context.getThemeAttrColor(
+            if (lesson.changes || lesson.info.isNotBlank()) R.attr.colorTimetableChange
+            else android.R.attr.textColorPrimary
+        ))
+    }
+
+    private fun updateSubjectColor(holder: ViewHolder) {
+        holder.timetableItemSubject.setTextColor(holder.view.context.getThemeAttrColor(
+            if (lesson.subjectOld.isNotBlank() && lesson.subjectOld != lesson.subject) R.attr.colorTimetableChange
+            else android.R.attr.textColorPrimary
+        ))
+    }
+
+    private fun updateRoomColor(holder: ViewHolder) {
+        holder.timetableItemRoom.setTextColor(holder.view.context.getThemeAttrColor(
+            if (lesson.roomOld.isNotBlank() && lesson.roomOld != lesson.room) R.attr.colorTimetableChange
+            else android.R.attr.textColorSecondary
+        ))
+    }
+
+    private fun updateTeacherColor(holder: ViewHolder) {
+        holder.timetableItemTeacher.setTextColor(holder.view.context.getThemeAttrColor(
+            if (lesson.teacherOld.isNotBlank() && lesson.teacherOld != lesson.teacher) R.attr.colorTimetableChange
+            else android.R.attr.textColorSecondary
+        ))
     }
 
     override fun equals(other: Any?): Boolean {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetablePresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetablePresenter.kt
index ebda3931a..4c30ecb7f 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetablePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetablePresenter.kt
@@ -1,14 +1,15 @@
 package io.github.wulkanowy.ui.modules.timetable
 
-import com.google.firebase.analytics.FirebaseAnalytics.Param.START_DATE
+import android.annotation.SuppressLint
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.data.repositories.timetable.TimetableRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
+import io.github.wulkanowy.utils.getLastSchoolDayIfHoliday
 import io.github.wulkanowy.utils.isHolidays
 import io.github.wulkanowy.utils.nextOrSameSchoolDay
 import io.github.wulkanowy.utils.nextSchoolDay
@@ -16,28 +17,35 @@ import io.github.wulkanowy.utils.previousSchoolDay
 import io.github.wulkanowy.utils.toFormattedString
 import org.threeten.bp.LocalDate
 import org.threeten.bp.LocalDate.now
+import org.threeten.bp.LocalDate.of
 import org.threeten.bp.LocalDate.ofEpochDay
 import timber.log.Timber
 import java.util.concurrent.TimeUnit.MILLISECONDS
 import javax.inject.Inject
 
 class TimetablePresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
     private val timetableRepository: TimetableRepository,
-    private val studentRepository: StudentRepository,
     private val semesterRepository: SemesterRepository,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<TimetableView>(errorHandler) {
+) : BasePresenter<TimetableView>(errorHandler, studentRepository, schedulers) {
+
+    private var baseDate: LocalDate = now().nextOrSameSchoolDay
 
     lateinit var currentDate: LocalDate
         private set
 
+    private lateinit var lastError: Throwable
+
     fun onAttachView(view: TimetableView, date: Long?) {
         super.onAttachView(view)
-        Timber.i("Timetable is attached")
         view.initView()
-        loadData(ofEpochDay(date ?: now().nextOrSameSchoolDay.toEpochDay()))
+        Timber.i("Timetable was initialized")
+        errorHandler.showErrorMessage = ::showErrorViewOnError
+        loadData(ofEpochDay(date ?: baseDate.toEpochDay()))
+        if (currentDate.isHolidays) setBaseDateOnHolidays()
         reloadView()
     }
 
@@ -51,16 +59,37 @@ class TimetablePresenter @Inject constructor(
         reloadView()
     }
 
+    fun onPickDate() {
+        view?.showDatePickerDialog(currentDate)
+    }
+
+    fun onDateSet(year: Int, month: Int, day: Int) {
+        loadData(of(year, month, day))
+        reloadView()
+    }
+
     fun onSwipeRefresh() {
         Timber.i("Force refreshing the timetable")
         loadData(currentDate, true)
     }
 
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(currentDate, true)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
     fun onViewReselected() {
         Timber.i("Timetable view is reselected")
         view?.also { view ->
             if (view.currentStackSize == 1) {
-                now().nextOrSameSchoolDay.also {
+                baseDate.also {
                     if (currentDate != it) {
                         loadData(it)
                         reloadView()
@@ -72,7 +101,7 @@ class TimetablePresenter @Inject constructor(
 
     fun onTimetableItemSelected(item: AbstractFlexibleItem<*>?) {
         if (item is TimetableItem) {
-            Timber.i("Select exam item ${item.lesson.id}")
+            Timber.i("Select timetable item ${item.lesson.id}")
             view?.showTimetableDialog(item.lesson)
         }
     }
@@ -82,6 +111,20 @@ class TimetablePresenter @Inject constructor(
         return true
     }
 
+    private fun setBaseDateOnHolidays() {
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .subscribe({
+                baseDate = baseDate.getLastSchoolDayIfHoliday(it.schoolYear)
+                currentDate = baseDate
+                reloadNavigation()
+            }) {
+                Timber.i("Loading semester result: An exception occurred")
+            })
+    }
+
     private fun loadData(date: LocalDate, forceRefresh: Boolean = false) {
         Timber.i("Loading timetable data started")
         currentDate = date
@@ -91,7 +134,7 @@ class TimetablePresenter @Inject constructor(
                 .flatMap { semesterRepository.getCurrentSemester(it) }
                 .delay(200, MILLISECONDS)
                 .flatMap { timetableRepository.getTimetable(it, currentDate, currentDate, forceRefresh) }
-                .map { items -> items.map { TimetableItem(it, view?.roomString.orEmpty()) } }
+                .map { items -> items.map { TimetableItem(it) } }
                 .map { items -> items.sortedBy { it.lesson.number } }
                 .subscribeOn(schedulers.backgroundThread)
                 .observeOn(schedulers.mainThread)
@@ -107,17 +150,28 @@ class TimetablePresenter @Inject constructor(
                     view?.apply {
                         updateData(it)
                         showEmpty(it.isEmpty())
+                        showErrorView(false)
                         showContent(it.isNotEmpty())
                     }
-                    analytics.logEvent("load_timetable", "items" to it.size, "force_refresh" to forceRefresh, START_DATE to currentDate.toFormattedString("yyyy-MM-dd"))
+                    analytics.logEvent("load_timetable", "items" to it.size, "force_refresh" to forceRefresh)
                 }) {
                     Timber.i("Loading timetable result: An exception occurred")
-                    view?.run { showEmpty(isViewEmpty) }
                     errorHandler.dispatch(it)
                 })
         }
     }
 
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
+
     private fun reloadView() {
         Timber.i("Reload timetable view with the date ${currentDate.toFormattedString()}")
         view?.apply {
@@ -125,10 +179,18 @@ class TimetablePresenter @Inject constructor(
             enableSwipe(false)
             showContent(false)
             showEmpty(false)
+            showErrorView(false)
             clearData()
-            showNextButton(!currentDate.plusDays(1).isHolidays)
+            reloadNavigation()
+        }
+    }
+
+    @SuppressLint("DefaultLocale")
+    private fun reloadNavigation() {
+        view?.apply {
             showPreButton(!currentDate.minusDays(1).isHolidays)
-            updateNavigationDay(currentDate.toFormattedString("EEEE\ndd.MM.YYYY").capitalize())
+            showNextButton(!currentDate.plusDays(1).isHolidays)
+            updateNavigationDay(currentDate.toFormattedString("EEEE, dd.MM").capitalize())
         }
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableView.kt
index c08961c36..f730a2712 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/TimetableView.kt
@@ -1,11 +1,10 @@
 package io.github.wulkanowy.ui.modules.timetable
 
 import io.github.wulkanowy.data.db.entities.Timetable
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
+import org.threeten.bp.LocalDate
 
-interface TimetableView : BaseSessionView {
-
-    val roomString: String
+interface TimetableView : BaseView {
 
     val isViewEmpty: Boolean
 
@@ -25,6 +24,10 @@ interface TimetableView : BaseSessionView {
 
     fun showEmpty(show: Boolean)
 
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
     fun showProgress(show: Boolean)
 
     fun enableSwipe(enable: Boolean)
@@ -37,6 +40,8 @@ interface TimetableView : BaseSessionView {
 
     fun showTimetableDialog(lesson: Timetable)
 
+    fun showDatePickerDialog(currentDate: LocalDate)
+
     fun popView()
 
     fun openCompletedLessonsView()
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonItem.kt
index 716903f55..fd6dc8a66 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonItem.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonItem.kt
@@ -9,6 +9,7 @@ import eu.davidea.flexibleadapter.items.IFlexible
 import eu.davidea.viewholders.FlexibleViewHolder
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.CompletedLesson
+import io.github.wulkanowy.utils.getThemeAttrColor
 import kotlinx.android.extensions.LayoutContainer
 import kotlinx.android.synthetic.main.item_completed_lesson.*
 
@@ -23,6 +24,10 @@ class CompletedLessonItem(val completedLesson: CompletedLesson) : AbstractFlexib
     override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>?, holder: CompletedLessonItem.ViewHolder?, position: Int, payloads: MutableList<Any>?) {
         holder?.apply {
             completedLessonItemNumber.text = completedLesson.number.toString()
+            completedLessonItemNumber.setTextColor(holder.contentView.context.getThemeAttrColor(
+                if (completedLesson.substitution.isNotEmpty()) R.attr.colorTimetableChange
+                else android.R.attr.textColorPrimary
+            ))
             completedLessonItemSubject.text = completedLesson.subject
             completedLessonItemTopic.text = completedLesson.topic
             completedLessonItemAlert.visibility = if (completedLesson.substitution.isNotEmpty()) VISIBLE else GONE
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsErrorHandler.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsErrorHandler.kt
index 50d556859..1d043af3a 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsErrorHandler.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsErrorHandler.kt
@@ -2,14 +2,14 @@ package io.github.wulkanowy.ui.modules.timetable.completed
 
 import android.content.res.Resources
 import com.readystatesoftware.chuck.api.ChuckCollector
-import io.github.wulkanowy.api.interceptor.FeatureDisabledException
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.sdk.exception.FeatureDisabledException
+import io.github.wulkanowy.ui.base.ErrorHandler
 import javax.inject.Inject
 
 class CompletedLessonsErrorHandler @Inject constructor(
     resources: Resources,
     chuckCollector: ChuckCollector
-) : SessionErrorHandler(resources, chuckCollector) {
+) : ErrorHandler(resources, chuckCollector) {
 
     var onFeatureDisabled: () -> Unit = {}
 
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsFragment.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsFragment.kt
index bb328c414..60c16b2dc 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsFragment.kt
@@ -3,21 +3,28 @@ package io.github.wulkanowy.ui.modules.timetable.completed
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
+import android.view.View.GONE
+import android.view.View.INVISIBLE
+import android.view.View.VISIBLE
 import android.view.ViewGroup
-import androidx.core.content.ContextCompat
+import com.wdullaer.materialdatetimepicker.date.DatePickerDialog
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.CompletedLesson
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.utils.SchooldaysRangeLimiter
+import io.github.wulkanowy.utils.dpToPx
+import io.github.wulkanowy.utils.getCompatDrawable
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_timetable_completed.*
+import org.threeten.bp.LocalDate
 import javax.inject.Inject
 
-class CompletedLessonsFragment : BaseSessionFragment(), CompletedLessonsView, MainView.TitledView {
+class CompletedLessonsFragment : BaseFragment(), CompletedLessonsView, MainView.TitledView {
 
     @Inject
     lateinit var presenter: CompletedLessonsPresenter
@@ -31,11 +38,9 @@ class CompletedLessonsFragment : BaseSessionFragment(), CompletedLessonsView, Ma
         fun newInstance() = CompletedLessonsFragment()
     }
 
-    override val titleStringId: Int
-        get() = R.string.completed_lessons_title
+    override val titleStringId get() = R.string.completed_lessons_title
 
-    override val isViewEmpty
-        get() = completedLessonsAdapter.isEmpty
+    override val isViewEmpty get() = completedLessonsAdapter.isEmpty
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.fragment_timetable_completed, container, false)
@@ -48,17 +53,22 @@ class CompletedLessonsFragment : BaseSessionFragment(), CompletedLessonsView, Ma
     }
 
     override fun initView() {
-        completedLessonsAdapter.run {
-            setOnItemClickListener { presenter.onCompletedLessonsItemSelected(it) }
-        }
+        completedLessonsAdapter.setOnItemClickListener(presenter::onCompletedLessonsItemSelected)
 
-        completedLessonsRecycler.run {
+        with(completedLessonsRecycler) {
             layoutManager = SmoothScrollLinearLayoutManager(context)
             adapter = completedLessonsAdapter
         }
-        completedLessonsSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+
+        completedLessonsSwipe.setOnRefreshListener(presenter::onSwipeRefresh)
+        completedLessonErrorRetry.setOnClickListener { presenter.onRetry() }
+        completedLessonErrorDetails.setOnClickListener { presenter.onDetailsClick() }
+
         completedLessonsPreviousButton.setOnClickListener { presenter.onPreviousDay() }
+        completedLessonsNavDate.setOnClickListener { presenter.onPickDate() }
         completedLessonsNextButton.setOnClickListener { presenter.onNextDay() }
+
+        completedLessonsNavContainer.setElevationCompat(requireContext().dpToPx(8f))
     }
 
     override fun updateData(data: List<CompletedLessonItem>) {
@@ -78,18 +88,24 @@ class CompletedLessonsFragment : BaseSessionFragment(), CompletedLessonsView, Ma
     }
 
     override fun showEmpty(show: Boolean) {
-        completedLessonsEmpty.visibility = if (show) View.VISIBLE else View.GONE
+        completedLessonsEmpty.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun showErrorView(show: Boolean) {
+        completedLessonError.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun setErrorDetails(message: String) {
+        completedLessonErrorMessage.text = message
     }
 
     override fun showFeatureDisabled() {
-        context?.let {
-            completedLessonsInfo.text = getString(R.string.error_feature_disabled)
-            completedLessonsInfoImage.setImageDrawable(ContextCompat.getDrawable(it, R.drawable.ic_all_close_circle_24dp))
-        }
+        completedLessonsInfo.text = getString(R.string.error_feature_disabled)
+        completedLessonsInfoImage.setImageDrawable(requireContext().getCompatDrawable(R.drawable.ic_all_close_circle))
     }
 
     override fun showProgress(show: Boolean) {
-        completedLessonsProgress.visibility = if (show) View.VISIBLE else View.GONE
+        completedLessonsProgress.visibility = if (show) VISIBLE else GONE
     }
 
     override fun enableSwipe(enable: Boolean) {
@@ -97,24 +113,39 @@ class CompletedLessonsFragment : BaseSessionFragment(), CompletedLessonsView, Ma
     }
 
     override fun showContent(show: Boolean) {
-        completedLessonsRecycler.visibility = if (show) View.VISIBLE else View.GONE
+        completedLessonsRecycler.visibility = if (show) VISIBLE else GONE
     }
 
     override fun showPreButton(show: Boolean) {
-        completedLessonsPreviousButton.visibility = if (show) View.VISIBLE else View.INVISIBLE
+        completedLessonsPreviousButton.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showNextButton(show: Boolean) {
-        completedLessonsNextButton.visibility = if (show) View.VISIBLE else View.INVISIBLE
+        completedLessonsNextButton.visibility = if (show) VISIBLE else INVISIBLE
     }
 
     override fun showCompletedLessonDialog(completedLesson: CompletedLesson) {
         (activity as? MainActivity)?.showDialogFragment(CompletedLessonDialog.newInstance(completedLesson))
     }
 
+    override fun showDatePickerDialog(currentDate: LocalDate) {
+        val dateSetListener = DatePickerDialog.OnDateSetListener { _, year, month, dayOfMonth ->
+            presenter.onDateSet(year, month + 1, dayOfMonth)
+        }
+        val datePickerDialog = DatePickerDialog.newInstance(dateSetListener,
+            currentDate.year, currentDate.monthValue - 1, currentDate.dayOfMonth)
+
+        with(datePickerDialog) {
+            setDateRangeLimiter(SchooldaysRangeLimiter())
+            version = DatePickerDialog.Version.VERSION_2
+            scrollOrientation = DatePickerDialog.ScrollOrientation.VERTICAL
+            show(this@CompletedLessonsFragment.parentFragmentManager, null)
+        }
+    }
+
     override fun onSaveInstanceState(outState: Bundle) {
         super.onSaveInstanceState(outState)
-        outState.putLong(CompletedLessonsFragment.SAVED_DATE_KEY, presenter.currentDate.toEpochDay())
+        outState.putLong(SAVED_DATE_KEY, presenter.currentDate.toEpochDay())
     }
 
     override fun onDestroyView() {
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsPresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsPresenter.kt
index 6a14acda5..e2b569508 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsPresenter.kt
@@ -1,13 +1,14 @@
 package io.github.wulkanowy.ui.modules.timetable.completed
 
-import com.google.firebase.analytics.FirebaseAnalytics.Param.START_DATE
+import android.annotation.SuppressLint
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.repositories.completedlessons.CompletedLessonsRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
+import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
+import io.github.wulkanowy.utils.getLastSchoolDayIfHoliday
 import io.github.wulkanowy.utils.isHolidays
 import io.github.wulkanowy.utils.nextOrSameSchoolDay
 import io.github.wulkanowy.utils.nextSchoolDay
@@ -21,27 +22,33 @@ import java.util.concurrent.TimeUnit
 import javax.inject.Inject
 
 class CompletedLessonsPresenter @Inject constructor(
-    private val schedulers: SchedulersProvider,
-    private val errorHandler: CompletedLessonsErrorHandler,
-    private val studentRepository: StudentRepository,
+    schedulers: SchedulersProvider,
+    studentRepository: StudentRepository,
+    private val completedLessonsErrorHandler: CompletedLessonsErrorHandler,
     private val semesterRepository: SemesterRepository,
     private val completedLessonsRepository: CompletedLessonsRepository,
     private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<CompletedLessonsView>(errorHandler) {
+) : BasePresenter<CompletedLessonsView>(completedLessonsErrorHandler, studentRepository, schedulers) {
+
+    private var baseDate: LocalDate = now().nextOrSameSchoolDay
 
     lateinit var currentDate: LocalDate
         private set
 
+    private lateinit var lastError: Throwable
+
     fun onAttachView(view: CompletedLessonsView, date: Long?) {
         super.onAttachView(view)
         Timber.i("Completed lessons is attached")
         view.initView()
-        loadData(ofEpochDay(date ?: now().nextOrSameSchoolDay.toEpochDay()))
-        reloadView()
-        errorHandler.onFeatureDisabled = {
+        completedLessonsErrorHandler.showErrorMessage = ::showErrorViewOnError
+        completedLessonsErrorHandler.onFeatureDisabled = {
             this.view?.showFeatureDisabled()
             Timber.i("Completed lessons feature disabled by school")
         }
+        loadData(ofEpochDay(date ?: baseDate.toEpochDay()))
+        if (currentDate.isHolidays) setBaseDateOnHolidays()
+        reloadView()
     }
 
     fun onPreviousDay() {
@@ -54,11 +61,32 @@ class CompletedLessonsPresenter @Inject constructor(
         reloadView()
     }
 
+    fun onPickDate() {
+        view?.showDatePickerDialog(currentDate)
+    }
+
+    fun onDateSet(year: Int, month: Int, day: Int) {
+        loadData(LocalDate.of(year, month, day))
+        reloadView()
+    }
+
     fun onSwipeRefresh() {
         Timber.i("Force refreshing the completed lessons")
         loadData(currentDate, true)
     }
 
+    fun onRetry() {
+        view?.run {
+            showErrorView(false)
+            showProgress(true)
+        }
+        loadData(currentDate, true)
+    }
+
+    fun onDetailsClick() {
+        view?.showErrorDetailsDialog(lastError)
+    }
+
     fun onCompletedLessonsItemSelected(item: AbstractFlexibleItem<*>?) {
         if (item is CompletedLessonItem) {
             Timber.i("Select completed lessons item ${item.completedLesson.id}")
@@ -66,6 +94,20 @@ class CompletedLessonsPresenter @Inject constructor(
         }
     }
 
+    private fun setBaseDateOnHolidays() {
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .subscribe({
+                baseDate = baseDate.getLastSchoolDayIfHoliday(it.schoolYear)
+                currentDate = baseDate
+                reloadNavigation()
+            }) {
+                Timber.i("Loading semester result: An exception occurred")
+            })
+    }
+
     private fun loadData(date: LocalDate, forceRefresh: Boolean = false) {
         Timber.i("Loading completed lessons data started")
         currentDate = date
@@ -91,17 +133,28 @@ class CompletedLessonsPresenter @Inject constructor(
                     view?.apply {
                         updateData(it)
                         showEmpty(it.isEmpty())
+                        showErrorView(false)
                         showContent(it.isNotEmpty())
                     }
-                    analytics.logEvent("load_completed_lessons", "items" to it.size, "force_refresh" to forceRefresh, START_DATE to currentDate.toFormattedString("yyyy-MM-dd"))
+                    analytics.logEvent("load_completed_lessons", "items" to it.size, "force_refresh" to forceRefresh)
                 }) {
                     Timber.i("Loading completed lessons result: An exception occurred")
-                    view?.run { showEmpty(isViewEmpty) }
-                    errorHandler.dispatch(it)
+                    completedLessonsErrorHandler.dispatch(it)
                 })
         }
     }
 
+    private fun showErrorViewOnError(message: String, error: Throwable) {
+        view?.run {
+            if (isViewEmpty) {
+                lastError = error
+                setErrorDetails(message)
+                showErrorView(true)
+                showEmpty(false)
+            } else showError(message, error)
+        }
+    }
+
     private fun reloadView() {
         Timber.i("Reload completed lessons view with the date ${currentDate.toFormattedString()}")
         view?.apply {
@@ -109,10 +162,18 @@ class CompletedLessonsPresenter @Inject constructor(
             enableSwipe(false)
             showContent(false)
             showEmpty(false)
+            showErrorView(false)
             clearData()
-            showNextButton(!currentDate.plusDays(1).isHolidays)
+            reloadNavigation()
+        }
+    }
+
+    @SuppressLint("DefaultLocale")
+    private fun reloadNavigation() {
+        view?.apply {
             showPreButton(!currentDate.minusDays(1).isHolidays)
-            updateNavigationDay(currentDate.toFormattedString("EEEE\ndd.MM.YYYY").capitalize())
+            showNextButton(!currentDate.plusDays(1).isHolidays)
+            updateNavigationDay(currentDate.toFormattedString("EEEE, dd.MM").capitalize())
         }
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsView.kt
index 9607cc476..a6a327e2d 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetable/completed/CompletedLessonsView.kt
@@ -1,9 +1,10 @@
 package io.github.wulkanowy.ui.modules.timetable.completed
 
 import io.github.wulkanowy.data.db.entities.CompletedLesson
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
+import org.threeten.bp.LocalDate
 
-interface CompletedLessonsView : BaseSessionView {
+interface CompletedLessonsView : BaseView {
 
     val isViewEmpty: Boolean
 
@@ -19,6 +20,10 @@ interface CompletedLessonsView : BaseSessionView {
 
     fun showEmpty(show: Boolean)
 
+    fun showErrorView(show: Boolean)
+
+    fun setErrorDetails(message: String)
+
     fun showFeatureDisabled()
 
     fun showProgress(show: Boolean)
@@ -32,4 +37,6 @@ interface CompletedLessonsView : BaseSessionView {
     fun showNextButton(show: Boolean)
 
     fun showCompletedLessonDialog(completedLesson: CompletedLesson)
+
+    fun showDatePickerDialog(currentDate: LocalDate)
 }
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetConfigureActivity.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetConfigureActivity.kt
new file mode 100644
index 000000000..7636637f4
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetConfigureActivity.kt
@@ -0,0 +1,99 @@
+package io.github.wulkanowy.ui.modules.timetablewidget
+
+import android.appwidget.AppWidgetManager.ACTION_APPWIDGET_UPDATE
+import android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_ID
+import android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_IDS
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Toast
+import android.widget.Toast.LENGTH_LONG
+import androidx.appcompat.app.AlertDialog
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.base.BaseActivity
+import io.github.wulkanowy.ui.modules.login.LoginActivity
+import io.github.wulkanowy.ui.modules.timetablewidget.TimetableWidgetProvider.Companion.EXTRA_FROM_PROVIDER
+import io.github.wulkanowy.utils.setOnItemClickListener
+import kotlinx.android.synthetic.main.activity_widget_configure.*
+import javax.inject.Inject
+
+class TimetableWidgetConfigureActivity : BaseActivity<TimetableWidgetConfigurePresenter>(),
+    TimetableWidgetConfigureView {
+
+    @Inject
+    lateinit var configureAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>
+
+    @Inject
+    override lateinit var presenter: TimetableWidgetConfigurePresenter
+
+    private var dialog: AlertDialog? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setResult(RESULT_CANCELED)
+        setContentView(R.layout.activity_widget_configure)
+
+        intent.extras.let {
+            presenter.onAttachView(this, it?.getInt(EXTRA_APPWIDGET_ID), it?.getBoolean(EXTRA_FROM_PROVIDER))
+        }
+    }
+
+    override fun initView() {
+        with(widgetConfigureRecycler) {
+            adapter = configureAdapter
+            layoutManager = SmoothScrollLinearLayoutManager(context)
+        }
+
+        configureAdapter.setOnItemClickListener(presenter::onItemSelect)
+    }
+
+    override fun showThemeDialog() {
+        val items = arrayOf(
+            getString(R.string.widget_timetable_theme_light),
+            getString(R.string.widget_timetable_theme_dark)
+        )
+
+        dialog = AlertDialog.Builder(this, R.style.WulkanowyTheme_WidgetAccountSwitcher)
+            .setTitle(R.string.widget_timetable_theme_title)
+            .setOnDismissListener { presenter.onDismissThemeView() }
+            .setSingleChoiceItems(items, -1) { _, which ->
+                presenter.onThemeSelect(which)
+            }
+            .show()
+    }
+
+    override fun updateData(data: List<TimetableWidgetConfigureItem>) {
+        configureAdapter.updateDataSet(data)
+    }
+
+    override fun updateTimetableWidget(widgetId: Int) {
+        sendBroadcast(Intent(this, TimetableWidgetProvider::class.java)
+            .apply {
+                action = ACTION_APPWIDGET_UPDATE
+                putExtra(EXTRA_APPWIDGET_IDS, intArrayOf(widgetId))
+            })
+    }
+
+    override fun setSuccessResult(widgetId: Int) {
+        setResult(RESULT_OK, Intent().apply { putExtra(EXTRA_APPWIDGET_ID, widgetId) })
+    }
+
+    override fun showError(text: String, error: Throwable) {
+        Toast.makeText(this, text, LENGTH_LONG).show()
+    }
+
+    override fun finishView() {
+        finish()
+    }
+
+    override fun openLoginView() {
+        startActivity(LoginActivity.getStartIntent(this))
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        dialog?.dismiss()
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetConfigureItem.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetConfigureItem.kt
new file mode 100644
index 000000000..a3338c684
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetConfigureItem.kt
@@ -0,0 +1,59 @@
+package io.github.wulkanowy.ui.modules.timetablewidget
+
+import android.annotation.SuppressLint
+import android.view.View
+import androidx.core.graphics.ColorUtils
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import eu.davidea.flexibleadapter.items.IFlexible
+import eu.davidea.viewholders.FlexibleViewHolder
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.utils.getThemeAttrColor
+import kotlinx.android.extensions.LayoutContainer
+import kotlinx.android.synthetic.main.item_account.*
+
+class TimetableWidgetConfigureItem(val student: Student, private val isCurrent: Boolean) :
+    AbstractFlexibleItem<TimetableWidgetConfigureItem.ViewHolder>() {
+
+    override fun getLayoutRes() = R.layout.item_account
+
+    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>) = ViewHolder(view, adapter)
+
+    @SuppressLint("SetTextI18n")
+    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>) {
+        val context = holder.contentView.context
+
+        val colorImage = if (isCurrent) context.getThemeAttrColor(R.attr.colorPrimary)
+        else ColorUtils.setAlphaComponent(context.getThemeAttrColor(R.attr.colorOnSurface), 153)
+
+        with(holder) {
+            accountItemName.text = "${student.studentName} ${student.className}"
+            accountItemSchool.text = student.schoolName
+            accountItemImage.setColorFilter(colorImage)
+        }
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as TimetableWidgetConfigureItem
+
+        if (student != other.student) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = student.hashCode()
+        result = 31 * result + student.id.toInt()
+        return result
+    }
+
+    class ViewHolder(view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter),
+        LayoutContainer {
+
+        override val containerView: View? get() = contentView
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetConfigurePresenter.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetConfigurePresenter.kt
new file mode 100644
index 000000000..e16851083
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetConfigurePresenter.kt
@@ -0,0 +1,87 @@
+package io.github.wulkanowy.ui.modules.timetablewidget
+
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.data.db.SharedPrefProvider
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.ui.modules.timetablewidget.TimetableWidgetProvider.Companion.getStudentWidgetKey
+import io.github.wulkanowy.ui.modules.timetablewidget.TimetableWidgetProvider.Companion.getThemeWidgetKey
+import io.github.wulkanowy.utils.SchedulersProvider
+import javax.inject.Inject
+
+class TimetableWidgetConfigurePresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
+    private val sharedPref: SharedPrefProvider
+) : BasePresenter<TimetableWidgetConfigureView>(errorHandler, studentRepository, schedulers) {
+
+    private var appWidgetId: Int? = null
+
+    private var isFromProvider = false
+
+    private var selectedStudent: Student? = null
+
+    fun onAttachView(view: TimetableWidgetConfigureView, appWidgetId: Int?, isFromProvider: Boolean?) {
+        super.onAttachView(view)
+        this.appWidgetId = appWidgetId
+        this.isFromProvider = isFromProvider ?: false
+        view.initView()
+        loadData()
+    }
+
+    fun onItemSelect(item: AbstractFlexibleItem<*>) {
+        if (item is TimetableWidgetConfigureItem) {
+            selectedStudent = item.student
+
+            if (isFromProvider) registerStudent(selectedStudent)
+            else view?.showThemeDialog()
+        }
+    }
+
+    fun onThemeSelect(index: Int) {
+        appWidgetId?.let {
+            sharedPref.putLong(getThemeWidgetKey(it), index.toLong())
+        }
+        registerStudent(selectedStudent)
+    }
+
+    fun onDismissThemeView(){
+        view?.finishView()
+    }
+
+    private fun loadData() {
+        disposable.add(studentRepository.getSavedStudents(false)
+            .map { it to appWidgetId?.let { id -> sharedPref.getLong(getStudentWidgetKey(id), 0) } }
+            .map { (students, currentStudentId) ->
+                students.map { student -> TimetableWidgetConfigureItem(student, student.id == currentStudentId) }
+            }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .subscribe({
+                when {
+                    it.isEmpty() -> view?.openLoginView()
+                    it.size == 1 && !isFromProvider -> {
+                        selectedStudent = it.single().student
+                        view?.showThemeDialog()
+                    }
+                    else -> view?.updateData(it)
+                }
+            }, { errorHandler.dispatch(it) }))
+    }
+
+    private fun registerStudent(student: Student?) {
+        requireNotNull(student)
+
+        appWidgetId?.let { id ->
+            sharedPref.putLong(getStudentWidgetKey(id), student.id)
+            view?.run {
+                updateTimetableWidget(id)
+                setSuccessResult(id)
+            }
+        }
+        view?.finishView()
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetConfigureView.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetConfigureView.kt
new file mode 100644
index 000000000..7cac892d9
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetConfigureView.kt
@@ -0,0 +1,20 @@
+package io.github.wulkanowy.ui.modules.timetablewidget
+
+import io.github.wulkanowy.ui.base.BaseView
+
+interface TimetableWidgetConfigureView : BaseView {
+
+    fun initView()
+
+    fun updateData(data: List<TimetableWidgetConfigureItem>)
+
+    fun updateTimetableWidget(widgetId: Int)
+
+    fun showThemeDialog()
+
+    fun setSuccessResult(widgetId: Int)
+
+    fun finishView()
+
+    fun openLoginView()
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetFactory.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetFactory.kt
new file mode 100644
index 000000000..fa989749a
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetFactory.kt
@@ -0,0 +1,206 @@
+package io.github.wulkanowy.ui.modules.timetablewidget
+
+import android.annotation.SuppressLint
+import android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_ID
+import android.content.Context
+import android.content.Intent
+import android.graphics.Paint.ANTI_ALIAS_FLAG
+import android.graphics.Paint.STRIKE_THRU_TEXT_FLAG
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.widget.AdapterView.INVALID_POSITION
+import android.widget.RemoteViews
+import android.widget.RemoteViewsService
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.SharedPrefProvider
+import io.github.wulkanowy.data.db.entities.Timetable
+import io.github.wulkanowy.data.repositories.semester.SemesterRepository
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.data.repositories.timetable.TimetableRepository
+import io.github.wulkanowy.ui.modules.timetablewidget.TimetableWidgetProvider.Companion.getDateWidgetKey
+import io.github.wulkanowy.ui.modules.timetablewidget.TimetableWidgetProvider.Companion.getStudentWidgetKey
+import io.github.wulkanowy.ui.modules.timetablewidget.TimetableWidgetProvider.Companion.getThemeWidgetKey
+import io.github.wulkanowy.utils.SchedulersProvider
+import io.github.wulkanowy.utils.getCompatColor
+import io.github.wulkanowy.utils.toFormattedString
+import io.reactivex.Maybe
+import org.threeten.bp.LocalDate
+import timber.log.Timber
+
+class TimetableWidgetFactory(
+    private val timetableRepository: TimetableRepository,
+    private val studentRepository: StudentRepository,
+    private val semesterRepository: SemesterRepository,
+    private val sharedPref: SharedPrefProvider,
+    private val schedulers: SchedulersProvider,
+    private val context: Context,
+    private val intent: Intent?
+) : RemoteViewsService.RemoteViewsFactory {
+
+    private var lessons = emptyList<Timetable>()
+
+    private var layoutId: Int? = null
+
+    private var primaryColor: Int? = null
+
+    private var textColor: Int? = null
+
+    private var timetableChangeColor: Int? = null
+
+    override fun getLoadingView() = null
+
+    override fun hasStableIds() = true
+
+    override fun getCount() = lessons.size
+
+    override fun getViewTypeCount() = 1
+
+    override fun getItemId(position: Int) = position.toLong()
+
+    override fun onCreate() {}
+
+    override fun onDestroy() {}
+
+    override fun onDataSetChanged() {
+        intent?.extras?.getInt(EXTRA_APPWIDGET_ID)?.let { appWidgetId ->
+            val date = LocalDate.ofEpochDay(sharedPref.getLong(getDateWidgetKey(appWidgetId), 0))
+            val studentId = sharedPref.getLong(getStudentWidgetKey(appWidgetId), 0)
+
+            updateTheme(appWidgetId)
+
+            updateLessons(date, studentId)
+        }
+    }
+
+    private fun updateTheme(appWidgetId: Int) {
+        val savedTheme = sharedPref.getLong(getThemeWidgetKey(appWidgetId), 0)
+        layoutId = if (savedTheme == 0L) R.layout.item_widget_timetable else R.layout.item_widget_timetable_dark
+
+        primaryColor = if (savedTheme == 0L) R.color.colorPrimary else R.color.colorPrimaryLight
+        textColor = if (savedTheme == 0L) android.R.color.black else android.R.color.white
+        timetableChangeColor = if (savedTheme == 0L) R.color.timetable_change_dark else R.color.timetable_change_light
+    }
+
+    private fun updateLessons(date: LocalDate, studentId: Long) {
+        lessons = try {
+            studentRepository.isStudentSaved()
+                .filter { true }
+                .flatMap { studentRepository.getSavedStudents().toMaybe() }
+                .flatMap {
+                    val student = it.singleOrNull { student -> student.id == studentId }
+
+                    if (student != null) Maybe.just(student)
+                    else Maybe.empty()
+                }
+                .flatMap { semesterRepository.getCurrentSemester(it).toMaybe() }
+                .flatMap { timetableRepository.getTimetable(it, date, date).toMaybe() }
+                .map { item -> item.sortedBy { it.number } }
+                .subscribeOn(schedulers.backgroundThread)
+                .blockingGet(emptyList())
+        } catch (e: Exception) {
+            Timber.e(e, "An error has occurred in timetable widget factory")
+            emptyList()
+        }
+    }
+
+    @SuppressLint("DefaultLocale")
+    override fun getViewAt(position: Int): RemoteViews? {
+        if (position == INVALID_POSITION || lessons.getOrNull(position) == null) return null
+
+        return RemoteViews(context.packageName, layoutId!!).apply {
+            val lesson = lessons[position]
+
+            setTextViewText(R.id.timetableWidgetItemSubject, lesson.subject)
+            setTextViewText(R.id.timetableWidgetItemNumber, lesson.number.toString())
+            setTextViewText(R.id.timetableWidgetItemTimeStart, lesson.start.toFormattedString("HH:mm"))
+            setTextViewText(R.id.timetableWidgetItemTimeFinish, lesson.end.toFormattedString("HH:mm"))
+
+            updateDescription(this, lesson)
+
+            if (lesson.canceled) {
+                updateStylesCanceled(this)
+            } else {
+                updateStylesNotCanceled(this, lesson)
+            }
+
+            setOnClickFillInIntent(R.id.timetableWidgetItemContainer, Intent())
+        }
+    }
+
+    private fun updateDescription(remoteViews: RemoteViews, lesson: Timetable) {
+        with(remoteViews) {
+            if (lesson.info.isNotBlank() && !lesson.changes) {
+                setTextViewText(R.id.timetableWidgetItemDescription, lesson.info)
+                setViewVisibility(R.id.timetableWidgetItemDescription, VISIBLE)
+                setViewVisibility(R.id.timetableWidgetItemRoom, GONE)
+                setViewVisibility(R.id.timetableWidgetItemTeacher, GONE)
+            } else {
+                setViewVisibility(R.id.timetableWidgetItemDescription, GONE)
+                setViewVisibility(R.id.timetableWidgetItemRoom, VISIBLE)
+                setViewVisibility(R.id.timetableWidgetItemTeacher, VISIBLE)
+            }
+        }
+    }
+
+    private fun updateStylesCanceled(remoteViews: RemoteViews) {
+        with(remoteViews) {
+            setInt(R.id.timetableWidgetItemSubject, "setPaintFlags",
+                STRIKE_THRU_TEXT_FLAG or ANTI_ALIAS_FLAG)
+            setTextColor(R.id.timetableWidgetItemNumber, context.getCompatColor(primaryColor!!))
+            setTextColor(R.id.timetableWidgetItemSubject, context.getCompatColor(primaryColor!!))
+            setTextColor(R.id.timetableWidgetItemDescription, context.getCompatColor(primaryColor!!))
+        }
+    }
+
+    private fun updateStylesNotCanceled(remoteViews: RemoteViews, lesson: Timetable) {
+        with(remoteViews) {
+            setInt(R.id.timetableWidgetItemSubject, "setPaintFlags", ANTI_ALIAS_FLAG)
+            setTextColor(R.id.timetableWidgetItemSubject, context.getCompatColor(textColor!!))
+            setTextColor(R.id.timetableWidgetItemDescription, context.getCompatColor(timetableChangeColor!!))
+
+            updateNotCanceledLessonNumberColor(this, lesson)
+            updateNotCanceledSubjectColor(this, lesson)
+
+            val teacherChange = lesson.teacherOld.isNotBlank() && lesson.teacher != lesson.teacherOld
+            updateNotCanceledRoom(this, lesson, teacherChange)
+            updateNotCanceledTeacher(this, lesson, teacherChange)
+        }
+    }
+
+    private fun updateNotCanceledLessonNumberColor(remoteViews: RemoteViews, lesson: Timetable) {
+        remoteViews.setTextColor(R.id.timetableWidgetItemNumber, context.getCompatColor(
+            if (lesson.changes || (lesson.info.isNotBlank() && !lesson.canceled)) timetableChangeColor!!
+            else textColor!!
+        ))
+    }
+
+    private fun updateNotCanceledSubjectColor(remoteViews: RemoteViews, lesson: Timetable) {
+        remoteViews.setTextColor(R.id.timetableWidgetItemSubject, context.getCompatColor(
+            if (lesson.subjectOld.isNotBlank() && lesson.subject != lesson.subjectOld) timetableChangeColor!!
+            else textColor!!
+        ))
+    }
+
+    private fun updateNotCanceledRoom(remoteViews: RemoteViews, lesson: Timetable, teacherChange: Boolean) {
+        with(remoteViews) {
+            if (lesson.room.isNotBlank()) {
+                setTextViewText(R.id.timetableWidgetItemRoom,
+                    if (teacherChange) lesson.room
+                    else "${context.getString(R.string.timetable_room)} ${lesson.room}"
+                )
+
+                setTextColor(R.id.timetableWidgetItemRoom, context.getCompatColor(
+                    if (lesson.roomOld.isNotBlank() && lesson.room != lesson.roomOld) timetableChangeColor!!
+                    else textColor!!
+                ))
+            } else setTextViewText(R.id.timetableWidgetItemRoom, "")
+        }
+    }
+
+    private fun updateNotCanceledTeacher(remoteViews: RemoteViews, lesson: Timetable, teacherChange: Boolean) {
+        remoteViews.setTextViewText(R.id.timetableWidgetItemTeacher,
+            if (teacherChange) lesson.teacher
+            else ""
+        )
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetProvider.kt b/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetProvider.kt
new file mode 100644
index 000000000..62192a1b0
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/timetablewidget/TimetableWidgetProvider.kt
@@ -0,0 +1,196 @@
+package io.github.wulkanowy.ui.modules.timetablewidget
+
+import android.annotation.SuppressLint
+import android.app.PendingIntent
+import android.app.PendingIntent.FLAG_UPDATE_CURRENT
+import android.appwidget.AppWidgetManager
+import android.appwidget.AppWidgetManager.ACTION_APPWIDGET_DELETED
+import android.appwidget.AppWidgetManager.ACTION_APPWIDGET_UPDATE
+import android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_ID
+import android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_IDS
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK
+import android.content.Intent.FLAG_ACTIVITY_NEW_TASK
+import android.widget.RemoteViews
+import dagger.android.AndroidInjection
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.SharedPrefProvider
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.data.exceptions.NoCurrentStudentException
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.services.widgets.TimetableWidgetService
+import io.github.wulkanowy.ui.modules.main.MainActivity
+import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
+import io.github.wulkanowy.utils.nextOrSameSchoolDay
+import io.github.wulkanowy.utils.nextSchoolDay
+import io.github.wulkanowy.utils.previousSchoolDay
+import io.github.wulkanowy.utils.toFormattedString
+import io.reactivex.Maybe
+import org.threeten.bp.LocalDate
+import org.threeten.bp.LocalDate.now
+import timber.log.Timber
+import javax.inject.Inject
+
+class TimetableWidgetProvider : BroadcastReceiver() {
+
+    @Inject
+    lateinit var appWidgetManager: AppWidgetManager
+
+    @Inject
+    lateinit var studentRepository: StudentRepository
+
+    @Inject
+    lateinit var sharedPref: SharedPrefProvider
+
+    @Inject
+    lateinit var schedulers: SchedulersProvider
+
+    @Inject
+    lateinit var analytics: FirebaseAnalyticsHelper
+
+    companion object {
+
+        private const val EXTRA_TOGGLED_WIDGET_ID = "extraToggledWidget"
+
+        private const val EXTRA_BUTTON_TYPE = "extraButtonType"
+
+        private const val BUTTON_NEXT = "buttonNext"
+
+        private const val BUTTON_PREV = "buttonPrev"
+
+        private const val BUTTON_RESET = "buttonReset"
+
+        const val EXTRA_FROM_PROVIDER = "extraFromProvider"
+
+        fun getDateWidgetKey(appWidgetId: Int) = "timetable_widget_date_$appWidgetId"
+
+        fun getStudentWidgetKey(appWidgetId: Int) = "timetable_widget_student_$appWidgetId"
+
+        fun getThemeWidgetKey(appWidgetId: Int) = "timetable_widget_theme_$appWidgetId"
+    }
+
+    override fun onReceive(context: Context, intent: Intent) {
+        AndroidInjection.inject(this, context)
+        when (intent.action) {
+            ACTION_APPWIDGET_UPDATE -> onUpdate(context, intent)
+            ACTION_APPWIDGET_DELETED -> onDelete(intent)
+        }
+    }
+
+    private fun onUpdate(context: Context, intent: Intent) {
+        if (intent.getStringExtra(EXTRA_BUTTON_TYPE) === null) {
+            intent.getIntArrayExtra(EXTRA_APPWIDGET_IDS)?.forEach { appWidgetId ->
+                val student = getStudent(sharedPref.getLong(getStudentWidgetKey(appWidgetId), 0), appWidgetId)
+                updateWidget(context, appWidgetId, now().nextOrSameSchoolDay, student)
+            }
+        } else {
+            val buttonType = intent.getStringExtra(EXTRA_BUTTON_TYPE)
+            val toggledWidgetId = intent.getIntExtra(EXTRA_TOGGLED_WIDGET_ID, 0)
+            val student = getStudent(sharedPref.getLong(getStudentWidgetKey(toggledWidgetId), 0), toggledWidgetId)
+            val savedDate = LocalDate.ofEpochDay(sharedPref.getLong(getDateWidgetKey(toggledWidgetId), 0))
+            val date = when (buttonType) {
+                BUTTON_RESET -> now().nextOrSameSchoolDay
+                BUTTON_NEXT -> savedDate.nextSchoolDay
+                BUTTON_PREV -> savedDate.previousSchoolDay
+                else -> now().nextOrSameSchoolDay
+            }
+            if (!buttonType.isNullOrBlank()) analytics.logEvent("changed_timetable_widget_day", "button" to buttonType)
+            updateWidget(context, toggledWidgetId, date, student)
+        }
+    }
+
+    private fun onDelete(intent: Intent) {
+        val appWidgetId = intent.getIntExtra(EXTRA_APPWIDGET_ID, 0)
+
+        if (appWidgetId != 0) {
+            with(sharedPref) {
+                delete(getStudentWidgetKey(appWidgetId))
+                delete(getDateWidgetKey(appWidgetId))
+            }
+        }
+    }
+
+    @SuppressLint("DefaultLocale")
+    private fun updateWidget(context: Context, appWidgetId: Int, date: LocalDate, student: Student?) {
+        val savedTheme = sharedPref.getLong(getThemeWidgetKey(appWidgetId), 0)
+        val layoutId = if (savedTheme == 0L) R.layout.widget_timetable else R.layout.widget_timetable_dark
+
+        val nextNavIntent = createNavIntent(context, appWidgetId, appWidgetId, BUTTON_NEXT)
+        val prevNavIntent = createNavIntent(context, -appWidgetId, appWidgetId, BUTTON_PREV)
+        val resetNavIntent = createNavIntent(context, Int.MAX_VALUE - appWidgetId, appWidgetId, BUTTON_RESET)
+        val adapterIntent = Intent(context, TimetableWidgetService::class.java)
+            .apply {
+                putExtra(EXTRA_APPWIDGET_ID, appWidgetId)
+                //make Intent unique
+                action = appWidgetId.toString()
+            }
+        val accountIntent = PendingIntent.getActivity(context, -Int.MAX_VALUE + appWidgetId,
+            Intent(context, TimetableWidgetConfigureActivity::class.java).apply {
+                addFlags(FLAG_ACTIVITY_NEW_TASK or FLAG_ACTIVITY_CLEAR_TASK)
+                putExtra(EXTRA_APPWIDGET_ID, appWidgetId)
+                putExtra(EXTRA_FROM_PROVIDER, true)
+            }, FLAG_UPDATE_CURRENT)
+        val appIntent = PendingIntent.getActivity(context, MainView.Section.TIMETABLE.id,
+            MainActivity.getStartIntent(context, MainView.Section.TIMETABLE, true), FLAG_UPDATE_CURRENT)
+
+        val remoteView = RemoteViews(context.packageName, layoutId).apply {
+            setEmptyView(R.id.timetableWidgetList, R.id.timetableWidgetEmpty)
+            setTextViewText(R.id.timetableWidgetDate, date.toFormattedString("EEEE, dd.MM").capitalize())
+            setTextViewText(R.id.timetableWidgetName, student?.studentName ?: context.getString(R.string.all_no_data))
+            setRemoteAdapter(R.id.timetableWidgetList, adapterIntent)
+            setOnClickPendingIntent(R.id.timetableWidgetNext, nextNavIntent)
+            setOnClickPendingIntent(R.id.timetableWidgetPrev, prevNavIntent)
+            setOnClickPendingIntent(R.id.timetableWidgetDate, resetNavIntent)
+            setOnClickPendingIntent(R.id.timetableWidgetName, resetNavIntent)
+            setOnClickPendingIntent(R.id.timetableWidgetAccount, accountIntent)
+            setPendingIntentTemplate(R.id.timetableWidgetList, appIntent)
+        }
+
+        sharedPref.putLong(getDateWidgetKey(appWidgetId), date.toEpochDay(), true)
+        with(appWidgetManager) {
+            notifyAppWidgetViewDataChanged(appWidgetId, R.id.timetableWidgetList)
+            updateAppWidget(appWidgetId, remoteView)
+        }
+    }
+
+    private fun createNavIntent(context: Context, code: Int, appWidgetId: Int, buttonType: String): PendingIntent {
+        return PendingIntent.getBroadcast(context, code,
+            Intent(context, TimetableWidgetProvider::class.java).apply {
+                action = ACTION_APPWIDGET_UPDATE
+                putExtra(EXTRA_BUTTON_TYPE, buttonType)
+                putExtra(EXTRA_TOGGLED_WIDGET_ID, appWidgetId)
+            }, FLAG_UPDATE_CURRENT)
+    }
+
+    private fun getStudent(studentId: Long, appWidgetId: Int): Student? {
+        return try {
+            studentRepository.isStudentSaved()
+                .filter { true }
+                .flatMap { studentRepository.getSavedStudents(false).toMaybe() }
+                .flatMap { students ->
+                    val student = students.singleOrNull { student -> student.id == studentId }
+                    when {
+                        student != null -> Maybe.just(student)
+                        studentId != 0L -> {
+                            studentRepository.isCurrentStudentSet()
+                                .filter { true }
+                                .flatMap { studentRepository.getCurrentStudent(false).toMaybe() }
+                                .doOnSuccess { sharedPref.putLong(getStudentWidgetKey(appWidgetId), it.id) }
+                        }
+                        else -> Maybe.empty()
+                    }
+                }
+                .subscribeOn(schedulers.backgroundThread)
+                .blockingGet()
+        } catch (e: Exception) {
+            if (e.cause !is NoCurrentStudentException) {
+                Timber.e(e, "An error has occurred in timetable widget provider")
+            }
+            null
+        }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/CustomTabLayout.kt b/app/src/main/java/io/github/wulkanowy/ui/widgets/FittedScrollableTabLayout.kt
similarity index 88%
rename from app/src/main/java/io/github/wulkanowy/ui/modules/grade/CustomTabLayout.kt
rename to app/src/main/java/io/github/wulkanowy/ui/widgets/FittedScrollableTabLayout.kt
index e6f01497c..0f121dc5b 100644
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/CustomTabLayout.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/widgets/FittedScrollableTabLayout.kt
@@ -1,14 +1,13 @@
-package io.github.wulkanowy.ui.modules.grade
+package io.github.wulkanowy.ui.widgets
 
 import android.content.Context
 import android.util.AttributeSet
 import android.view.ViewGroup
-import com.google.android.material.tabs.TabLayout
 
 /**
  * @see <a href="https://stackoverflow.com/a/50382854">Tabs don't fit to screen with tabmode=scrollable, Even with a Custom Tab Layout</a>
  */
-class CustomTabLayout : TabLayout {
+class FittedScrollableTabLayout : MaterialTabLayout {
 
     constructor(context: Context) : super(context)
 
diff --git a/app/src/main/java/io/github/wulkanowy/ui/widgets/MaterialLinearLayout.kt b/app/src/main/java/io/github/wulkanowy/ui/widgets/MaterialLinearLayout.kt
new file mode 100644
index 000000000..a04922e5d
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/widgets/MaterialLinearLayout.kt
@@ -0,0 +1,39 @@
+package io.github.wulkanowy.ui.widgets
+
+import android.content.Context
+import android.os.Build.VERSION.SDK_INT
+import android.os.Build.VERSION_CODES.LOLLIPOP
+import android.util.AttributeSet
+import android.widget.LinearLayout
+import androidx.core.view.ViewCompat
+import com.google.android.material.elevation.ElevationOverlayProvider
+import com.google.android.material.shape.MaterialShapeDrawable
+
+class MaterialLinearLayout : LinearLayout {
+
+    constructor(context: Context) : super(context)
+
+    constructor(context: Context, attr: AttributeSet) : super(context, attr)
+
+    constructor(context: Context, attr: AttributeSet, defStyleAttr: Int) : super(context, attr, defStyleAttr)
+
+    init {
+        val drawable = MaterialShapeDrawable.createWithElevationOverlay(context, ViewCompat.getElevation(this))
+        ViewCompat.setBackground(this, drawable)
+    }
+
+    override fun setElevation(elevation: Float) {
+        super.setElevation(elevation)
+        if (background is MaterialShapeDrawable) {
+            (background as MaterialShapeDrawable).elevation = elevation
+        }
+    }
+
+    fun setElevationCompat(elevation: Float) {
+        if (SDK_INT >= LOLLIPOP) {
+            setElevation(elevation)
+        } else {
+            setBackgroundColor(ElevationOverlayProvider(context).compositeOverlayWithThemeSurfaceColorIfNeeded(elevation))
+        }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/widgets/MaterialTabLayout.kt b/app/src/main/java/io/github/wulkanowy/ui/widgets/MaterialTabLayout.kt
new file mode 100644
index 000000000..e19d01116
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/ui/widgets/MaterialTabLayout.kt
@@ -0,0 +1,25 @@
+package io.github.wulkanowy.ui.widgets
+
+import android.content.Context
+import android.os.Build.VERSION.SDK_INT
+import android.os.Build.VERSION_CODES.LOLLIPOP
+import android.util.AttributeSet
+import com.google.android.material.elevation.ElevationOverlayProvider
+import com.google.android.material.tabs.TabLayout
+
+open class MaterialTabLayout : TabLayout {
+
+    constructor(context: Context) : super(context)
+
+    constructor(context: Context, attr: AttributeSet) : super(context, attr)
+
+    constructor(context: Context, attr: AttributeSet, defStyleAttr: Int) : super(context, attr, defStyleAttr)
+
+    fun setElevationCompat(elevation: Float) {
+        if (SDK_INT >= LOLLIPOP) {
+            setElevation(elevation)
+        } else {
+            setBackgroundColor(ElevationOverlayProvider(context).compositeOverlayWithThemeSurfaceColorIfNeeded(elevation))
+        }
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/widgets/timetable/TimetableWidgetFactory.kt b/app/src/main/java/io/github/wulkanowy/ui/widgets/timetable/TimetableWidgetFactory.kt
deleted file mode 100644
index f2d40ba7e..000000000
--- a/app/src/main/java/io/github/wulkanowy/ui/widgets/timetable/TimetableWidgetFactory.kt
+++ /dev/null
@@ -1,107 +0,0 @@
-package io.github.wulkanowy.ui.widgets.timetable
-
-import android.content.Context
-import android.content.Intent
-import android.graphics.Paint.ANTI_ALIAS_FLAG
-import android.graphics.Paint.STRIKE_THRU_TEXT_FLAG
-import android.view.View.GONE
-import android.view.View.VISIBLE
-import android.widget.AdapterView.INVALID_POSITION
-import android.widget.RemoteViews
-import android.widget.RemoteViewsService
-import io.github.wulkanowy.R
-import io.github.wulkanowy.data.db.SharedPrefHelper
-import io.github.wulkanowy.data.db.entities.Timetable
-import io.github.wulkanowy.data.repositories.semester.SemesterRepository
-import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.data.repositories.timetable.TimetableRepository
-import io.github.wulkanowy.utils.SchedulersProvider
-import io.github.wulkanowy.utils.toFormattedString
-import io.reactivex.Single
-import org.threeten.bp.LocalDate
-import timber.log.Timber
-
-class TimetableWidgetFactory(
-    private val timetableRepository: TimetableRepository,
-    private val studentRepository: StudentRepository,
-    private val semesterRepository: SemesterRepository,
-    private val sharedPref: SharedPrefHelper,
-    private val schedulers: SchedulersProvider,
-    private val context: Context,
-    private val intent: Intent?
-) : RemoteViewsService.RemoteViewsFactory {
-
-    private var lessons = emptyList<Timetable>()
-
-    override fun getLoadingView() = null
-
-    override fun hasStableIds() = true
-
-    override fun getCount() = lessons.size
-
-    override fun getViewTypeCount() = 1
-
-    override fun getItemId(position: Int) = position.toLong()
-
-    override fun onCreate() {}
-
-    override fun onDestroy() {}
-
-    override fun onDataSetChanged() {
-        intent?.action?.let { LocalDate.ofEpochDay(sharedPref.getLong(it, 0)) }
-            ?.let { date ->
-                try {
-                    lessons = studentRepository.isStudentSaved()
-                        .flatMap { isSaved ->
-                            if (isSaved) {
-                                studentRepository.getCurrentStudent()
-                                    .flatMap { semesterRepository.getCurrentSemester(it) }
-                                    .flatMap { timetableRepository.getTimetable(it, date, date) }
-                            } else Single.just(emptyList())
-                        }
-                        .map { item -> item.sortedBy { it.number } }
-                        .subscribeOn(schedulers.backgroundThread)
-                        .blockingGet()
-                } catch (e: Exception) {
-                    Timber.e(e, "An error has occurred while downloading data for the widget")
-                }
-            }
-    }
-
-    override fun getViewAt(position: Int): RemoteViews? {
-        if (position == INVALID_POSITION || lessons.getOrNull(position) === null) return null
-
-        return RemoteViews(context.packageName, R.layout.item_widget_timetable).apply {
-            lessons[position].let {
-                setTextViewText(R.id.timetableWidgetItemSubject, it.subject)
-                setTextViewText(R.id.timetableWidgetItemNumber, it.number.toString())
-                setTextViewText(R.id.timetableWidgetItemTime, it.start.toFormattedString("HH:mm") +
-                    " - ${it.end.toFormattedString("HH:mm")}")
-
-                if (it.room.isNotBlank()) {
-                    setTextViewText(R.id.timetableWidgetItemRoom, "${context.getString(R.string.timetable_room)} ${it.room}")
-                } else setTextViewText(R.id.timetableWidgetItemRoom, "")
-
-                if (it.info.isNotBlank()) {
-                    setViewVisibility(R.id.timetableWidgetItemDescription, VISIBLE)
-                    setTextViewText(R.id.timetableWidgetItemDescription, it.run {
-                        when (true) {
-                            canceled && !changes -> "Lekcja odwołana: $info"
-                            changes && teacher.isNotBlank() -> "Zastępstwo: $teacher"
-                            changes && teacher.isBlank() -> "Zastępstwo, ${info.decapitalize()}"
-                            else -> it.info.capitalize()
-                        }
-                    })
-                } else setViewVisibility(R.id.timetableWidgetItemDescription, GONE)
-
-                if (it.canceled) {
-                    setInt(R.id.timetableWidgetItemSubject, "setPaintFlags",
-                        STRIKE_THRU_TEXT_FLAG or ANTI_ALIAS_FLAG)
-                } else {
-                    setInt(R.id.timetableWidgetItemSubject, "setPaintFlags", ANTI_ALIAS_FLAG)
-                }
-            }
-            setOnClickFillInIntent(R.id.timetableWidgetItemContainer, Intent())
-        }
-    }
-}
diff --git a/app/src/main/java/io/github/wulkanowy/ui/widgets/timetable/TimetableWidgetProvider.kt b/app/src/main/java/io/github/wulkanowy/ui/widgets/timetable/TimetableWidgetProvider.kt
deleted file mode 100644
index 402366ecf..000000000
--- a/app/src/main/java/io/github/wulkanowy/ui/widgets/timetable/TimetableWidgetProvider.kt
+++ /dev/null
@@ -1,123 +0,0 @@
-package io.github.wulkanowy.ui.widgets.timetable
-
-import android.app.PendingIntent
-import android.app.PendingIntent.FLAG_UPDATE_CURRENT
-import android.appwidget.AppWidgetManager
-import android.appwidget.AppWidgetManager.ACTION_APPWIDGET_DELETED
-import android.appwidget.AppWidgetManager.ACTION_APPWIDGET_UPDATE
-import android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_ID
-import android.appwidget.AppWidgetManager.EXTRA_APPWIDGET_IDS
-import android.content.BroadcastReceiver
-import android.content.Context
-import android.content.Intent
-import android.widget.RemoteViews
-import dagger.android.AndroidInjection
-import io.github.wulkanowy.R
-import io.github.wulkanowy.data.db.SharedPrefHelper
-import io.github.wulkanowy.services.widgets.TimetableWidgetService
-import io.github.wulkanowy.ui.modules.main.MainActivity
-import io.github.wulkanowy.ui.modules.main.MainActivity.Companion.EXTRA_START_MENU_INDEX
-import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
-import io.github.wulkanowy.utils.nextOrSameSchoolDay
-import io.github.wulkanowy.utils.nextSchoolDay
-import io.github.wulkanowy.utils.previousSchoolDay
-import io.github.wulkanowy.utils.toFormattedString
-import io.github.wulkanowy.utils.weekDayName
-import org.threeten.bp.LocalDate
-import org.threeten.bp.LocalDate.now
-import javax.inject.Inject
-
-class TimetableWidgetProvider : BroadcastReceiver() {
-
-    @Inject
-    lateinit var appWidgetManager: AppWidgetManager
-
-    @Inject
-    lateinit var sharedPref: SharedPrefHelper
-
-    @Inject
-    lateinit var analytics: FirebaseAnalyticsHelper
-
-    companion object {
-        const val EXTRA_TOGGLED_WIDGET_ID = "extraToggledWidget"
-
-        const val EXTRA_BUTTON_TYPE = "extraButtonType"
-
-        const val BUTTON_NEXT = "buttonNext"
-
-        const val BUTTON_PREV = "buttonPrev"
-
-        const val BUTTON_RESET = "buttonReset"
-
-        fun createWidgetKey(appWidgetId: Int) = "timetable_widget_$appWidgetId"
-    }
-
-    override fun onReceive(context: Context, intent: Intent) {
-        AndroidInjection.inject(this, context)
-        when (intent.action) {
-            ACTION_APPWIDGET_UPDATE -> onUpdate(context, intent)
-            ACTION_APPWIDGET_DELETED -> onDelete(intent)
-        }
-    }
-
-    private fun onUpdate(context: Context, intent: Intent) {
-        if (intent.getStringExtra(EXTRA_BUTTON_TYPE) === null) {
-            intent.getIntArrayExtra(EXTRA_APPWIDGET_IDS)?.forEach { appWidgetId ->
-                updateWidget(context, appWidgetId, now().nextOrSameSchoolDay)
-            }
-        } else {
-            val buttonType = intent.getStringExtra(EXTRA_BUTTON_TYPE)
-            val toggledWidgetId = intent.getIntExtra(EXTRA_TOGGLED_WIDGET_ID, 0)
-            val savedDate = LocalDate.ofEpochDay(sharedPref.getLong(createWidgetKey(toggledWidgetId), 0))
-            val date = when (buttonType) {
-                BUTTON_RESET -> now().nextOrSameSchoolDay
-                BUTTON_NEXT -> savedDate.nextSchoolDay
-                BUTTON_PREV -> savedDate.previousSchoolDay
-                else -> now().nextOrSameSchoolDay
-            }
-            if (!buttonType.isNullOrBlank()) analytics.logEvent("changed_timetable_widget_day", "button" to buttonType)
-            updateWidget(context, toggledWidgetId, date)
-        }
-    }
-
-    private fun onDelete(intent: Intent) {
-        intent.getIntExtra(EXTRA_APPWIDGET_ID, 0).let {
-            if (it != 0) sharedPref.delete(createWidgetKey(it))
-        }
-    }
-
-    private fun updateWidget(context: Context, appWidgetId: Int, date: LocalDate) {
-        RemoteViews(context.packageName, R.layout.widget_timetable).apply {
-            setEmptyView(R.id.timetableWidgetList, R.id.timetableWidgetEmpty)
-            setTextViewText(R.id.timetableWidgetDay, date.weekDayName.capitalize())
-            setTextViewText(R.id.timetableWidgetDate, date.toFormattedString())
-            setRemoteAdapter(R.id.timetableWidgetList, Intent(context, TimetableWidgetService::class.java)
-                .apply { action = createWidgetKey(appWidgetId) })
-            setOnClickPendingIntent(R.id.timetableWidgetNext, createNavIntent(context, appWidgetId, appWidgetId, BUTTON_NEXT))
-            setOnClickPendingIntent(R.id.timetableWidgetPrev, createNavIntent(context, -appWidgetId, appWidgetId, BUTTON_PREV))
-            createNavIntent(context, Int.MAX_VALUE - appWidgetId, appWidgetId, BUTTON_RESET).also {
-                setOnClickPendingIntent(R.id.timetableWidgetDate, it)
-                setOnClickPendingIntent(R.id.timetableWidgetDay, it)
-            }
-            setPendingIntentTemplate(R.id.timetableWidgetList,
-                PendingIntent.getActivity(context, 1, MainActivity.getStartIntent(context).apply {
-                    putExtra(EXTRA_START_MENU_INDEX, 3)
-                }, FLAG_UPDATE_CURRENT))
-        }.also {
-            sharedPref.putLong(createWidgetKey(appWidgetId), date.toEpochDay(), true)
-            appWidgetManager.apply {
-                notifyAppWidgetViewDataChanged(appWidgetId, R.id.timetableWidgetList)
-                updateAppWidget(appWidgetId, it)
-            }
-        }
-    }
-
-    private fun createNavIntent(context: Context, code: Int, appWidgetId: Int, buttonType: String): PendingIntent {
-        return PendingIntent.getBroadcast(context, code,
-            Intent(context, TimetableWidgetProvider::class.java).apply {
-                action = ACTION_APPWIDGET_UPDATE
-                putExtra(EXTRA_BUTTON_TYPE, buttonType)
-                putExtra(EXTRA_TOGGLED_WIDGET_ID, appWidgetId)
-            }, FLAG_UPDATE_CURRENT)
-    }
-}
diff --git a/app/src/main/java/io/github/wulkanowy/utils/ActivityExtension.kt b/app/src/main/java/io/github/wulkanowy/utils/ActivityExtension.kt
index c0314d02e..e9cac72ea 100644
--- a/app/src/main/java/io/github/wulkanowy/utils/ActivityExtension.kt
+++ b/app/src/main/java/io/github/wulkanowy/utils/ActivityExtension.kt
@@ -1,18 +1,15 @@
 package io.github.wulkanowy.utils
 
 import android.app.Activity
-import android.content.Context.INPUT_METHOD_SERVICE
 import android.view.inputmethod.InputMethodManager
-
+import androidx.core.content.getSystemService
 
 fun Activity.showSoftInput() {
-    (getSystemService(INPUT_METHOD_SERVICE) as InputMethodManager?)?.run {
-        if (currentFocus != null) showSoftInput(currentFocus, 0)
+    getSystemService<InputMethodManager>()?.let { manager ->
+        currentFocus?.let { manager.showSoftInput(it, 0) }
     }
 }
 
 fun Activity.hideSoftInput() {
-    (getSystemService(INPUT_METHOD_SERVICE) as InputMethodManager?)?.run {
-        hideSoftInputFromWindow(window.decorView.applicationWindowToken, 0)
-    }
+    getSystemService<InputMethodManager>()?.hideSoftInputFromWindow(window.decorView.applicationWindowToken, 0)
 }
diff --git a/app/src/main/java/io/github/wulkanowy/utils/AppInfo.kt b/app/src/main/java/io/github/wulkanowy/utils/AppInfo.kt
new file mode 100644
index 000000000..a444da6fe
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/utils/AppInfo.kt
@@ -0,0 +1,33 @@
+package io.github.wulkanowy.utils
+
+import android.content.res.Resources
+import android.os.Build.MANUFACTURER
+import android.os.Build.MODEL
+import android.os.Build.VERSION.SDK_INT
+import io.github.wulkanowy.BuildConfig.CRASHLYTICS_ENABLED
+import io.github.wulkanowy.BuildConfig.DEBUG
+import io.github.wulkanowy.BuildConfig.VERSION_CODE
+import io.github.wulkanowy.BuildConfig.VERSION_NAME
+import javax.inject.Singleton
+
+@Singleton
+open class AppInfo {
+
+    open val isCrashlyticsEnabled get() = CRASHLYTICS_ENABLED
+
+    open val isDebug get() = DEBUG
+
+    open val versionCode get() = VERSION_CODE
+
+    open val versionName get() = VERSION_NAME
+
+    open val systemVersion get() = SDK_INT
+
+    open val systemManufacturer: String get() = MANUFACTURER
+
+    open val systemModel: String get() = MODEL
+
+    @Suppress("DEPRECATION")
+    open val systemLanguage: String
+        get() = Resources.getSystem().configuration.locale.language
+}
diff --git a/app/src/main/java/io/github/wulkanowy/utils/ContextExtension.kt b/app/src/main/java/io/github/wulkanowy/utils/ContextExtension.kt
index 70368badd..a265378e2 100644
--- a/app/src/main/java/io/github/wulkanowy/utils/ContextExtension.kt
+++ b/app/src/main/java/io/github/wulkanowy/utils/ContextExtension.kt
@@ -1,9 +1,13 @@
 package io.github.wulkanowy.utils
 
 import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.util.DisplayMetrics.DENSITY_DEFAULT
 import androidx.annotation.AttrRes
 import androidx.annotation.ColorInt
 import androidx.annotation.ColorRes
+import androidx.annotation.DrawableRes
 import androidx.core.content.ContextCompat
 
 @ColorInt
@@ -18,3 +22,36 @@ fun Context.getThemeAttrColor(@AttrRes colorAttr: Int): Int {
 
 @ColorInt
 fun Context.getCompatColor(@ColorRes colorRes: Int) = ContextCompat.getColor(this, colorRes)
+
+fun Context.getCompatDrawable(@DrawableRes drawableRes: Int) = ContextCompat.getDrawable(this, drawableRes)
+
+fun Context.openInternetBrowser(uri: String, onActivityNotFound: (uri: String) -> Unit) {
+    Intent.parseUri(uri, 0).let {
+        if (it.resolveActivity(packageManager) != null) startActivity(it)
+        else onActivityNotFound(uri)
+    }
+}
+
+fun Context.openEmailClient(chooserTitle: String, email: String, subject: String?, body: String?) {
+    val emailIntent = Intent(Intent.ACTION_SENDTO, Uri.fromParts("mailto", email, null))
+    emailIntent.putExtra(Intent.EXTRA_EMAIL, arrayOf(email))
+    if (subject != null) emailIntent.putExtra(Intent.EXTRA_SUBJECT, subject)
+    if (body != null) emailIntent.putExtra(Intent.EXTRA_TEXT, body)
+    startActivity(Intent.createChooser(emailIntent, chooserTitle))
+}
+
+fun Context.openNavigation(location: String) {
+    val intentUri = Uri.parse("geo:0,0?q=${Uri.encode(location)}")
+    val intent = Intent(Intent.ACTION_VIEW, intentUri)
+    if (intent.resolveActivity(packageManager) != null) {
+        startActivity(intent)
+    }
+}
+
+fun Context.openDialer(phone: String) {
+    val intentUri = Uri.parse("tel:$phone")
+    val intent = Intent(Intent.ACTION_DIAL, intentUri)
+    startActivity(intent)
+}
+
+fun Context.dpToPx(dp: Float) = dp * resources.displayMetrics.densityDpi / DENSITY_DEFAULT
diff --git a/app/src/main/java/io/github/wulkanowy/utils/EditTextExtension.kt b/app/src/main/java/io/github/wulkanowy/utils/EditTextExtension.kt
deleted file mode 100644
index caa977ec3..000000000
--- a/app/src/main/java/io/github/wulkanowy/utils/EditTextExtension.kt
+++ /dev/null
@@ -1,16 +0,0 @@
-package io.github.wulkanowy.utils
-
-import android.text.Editable
-import android.text.TextWatcher
-import android.widget.EditText
-
-inline fun EditText.setOnTextChangedListener(crossinline listener: () -> Unit) {
-    addTextChangedListener(object : TextWatcher {
-        override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
-            listener()
-        }
-
-        override fun afterTextChanged(s: Editable?) {}
-        override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {}
-    })
-}
diff --git a/app/src/main/java/io/github/wulkanowy/utils/FragNavControlerExtension.kt b/app/src/main/java/io/github/wulkanowy/utils/FragNavControlerExtension.kt
index dcf477548..9cec331f8 100644
--- a/app/src/main/java/io/github/wulkanowy/utils/FragNavControlerExtension.kt
+++ b/app/src/main/java/io/github/wulkanowy/utils/FragNavControlerExtension.kt
@@ -2,19 +2,20 @@ package io.github.wulkanowy.utils
 
 import androidx.fragment.app.Fragment
 import com.ncapdevi.fragnav.FragNavController
+import io.github.wulkanowy.ui.modules.main.MainView
 
-inline fun FragNavController.setOnViewChangeListener(crossinline listener: (fragment: Fragment?) -> Unit) {
+inline fun FragNavController.setOnViewChangeListener(crossinline listener: (section: MainView.Section?) -> Unit) {
     transactionListener = object : FragNavController.TransactionListener {
         override fun onFragmentTransaction(fragment: Fragment?, transactionType: FragNavController.TransactionType) {
-            listener(fragment)
+            listener(fragment?.toSection())
         }
 
         override fun onTabTransaction(fragment: Fragment?, index: Int) {
-            listener(fragment)
+            listener(fragment?.toSection())
         }
     }
 }
 
-fun FragNavController.safelyPopFragment() {
-    if (!isRootFragment) popFragment()
+fun FragNavController.safelyPopFragments(depth: Int) {
+    if (!isRootFragment) popFragments(depth)
 }
diff --git a/app/src/main/java/io/github/wulkanowy/utils/FragmentExtension.kt b/app/src/main/java/io/github/wulkanowy/utils/FragmentExtension.kt
new file mode 100644
index 000000000..0b71c964b
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/utils/FragmentExtension.kt
@@ -0,0 +1,34 @@
+package io.github.wulkanowy.utils
+
+import androidx.fragment.app.Fragment
+import io.github.wulkanowy.ui.modules.about.AboutFragment
+import io.github.wulkanowy.ui.modules.attendance.AttendanceFragment
+import io.github.wulkanowy.ui.modules.exam.ExamFragment
+import io.github.wulkanowy.ui.modules.grade.GradeFragment
+import io.github.wulkanowy.ui.modules.homework.HomeworkFragment
+import io.github.wulkanowy.ui.modules.luckynumber.LuckyNumberFragment
+import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.ui.modules.message.MessageFragment
+import io.github.wulkanowy.ui.modules.more.MoreFragment
+import io.github.wulkanowy.ui.modules.note.NoteFragment
+import io.github.wulkanowy.ui.modules.schoolandteachers.SchoolAndTeachersFragment
+import io.github.wulkanowy.ui.modules.settings.SettingsFragment
+import io.github.wulkanowy.ui.modules.timetable.TimetableFragment
+
+fun Fragment.toSection(): MainView.Section? {
+    return when (this) {
+        is GradeFragment -> MainView.Section.GRADE
+        is AttendanceFragment -> MainView.Section.ATTENDANCE
+        is ExamFragment -> MainView.Section.EXAM
+        is TimetableFragment -> MainView.Section.TIMETABLE
+        is MoreFragment -> MainView.Section.MORE
+        is MessageFragment -> MainView.Section.MESSAGE
+        is HomeworkFragment -> MainView.Section.HOMEWORK
+        is NoteFragment -> MainView.Section.NOTE
+        is LuckyNumberFragment -> MainView.Section.LUCKY_NUMBER
+        is SettingsFragment -> MainView.Section.SETTINGS
+        is AboutFragment -> MainView.Section.ABOUT
+        is SchoolAndTeachersFragment -> MainView.Section.SCHOOL
+        else -> null
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/utils/GradeExtension.kt b/app/src/main/java/io/github/wulkanowy/utils/GradeExtension.kt
index c863b030f..c1e182ba2 100644
--- a/app/src/main/java/io/github/wulkanowy/utils/GradeExtension.kt
+++ b/app/src/main/java/io/github/wulkanowy/utils/GradeExtension.kt
@@ -32,7 +32,7 @@ fun Grade.getBackgroundColor(theme: String): Int {
             "B16CF1" -> R.color.grade_purple
             else -> R.color.grade_material_default
         }
-        "material" -> when (value) {
+        "material" -> when (value.toInt()) {
             6 -> R.color.grade_material_six
             5 -> R.color.grade_material_five
             4 -> R.color.grade_material_four
@@ -41,7 +41,7 @@ fun Grade.getBackgroundColor(theme: String): Int {
             1 -> R.color.grade_material_one
             else -> R.color.grade_material_default
         }
-        else -> when (value) {
+        else -> when (value.toInt()) {
             6 -> R.color.grade_vulcan_six
             5 -> R.color.grade_vulcan_five
             4 -> R.color.grade_vulcan_four
@@ -67,8 +67,8 @@ inline val Grade.colorStringId: Int
 
 fun Grade.changeModifier(plusModifier: Double, minusModifier: Double): Grade {
     return when {
-        modifier != .0 && plusModifier != .0 && modifier > 0 -> copy(modifier = plusModifier)
-        modifier != .0 && minusModifier != .0 && modifier < 0 -> copy(modifier = -minusModifier)
+        modifier > 0 -> copy(modifier = plusModifier)
+        modifier < 0 -> copy(modifier = -minusModifier)
         else -> this
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/utils/LibsBuiderExtension.kt b/app/src/main/java/io/github/wulkanowy/utils/LibsBuiderExtension.kt
deleted file mode 100644
index d21b998bb..000000000
--- a/app/src/main/java/io/github/wulkanowy/utils/LibsBuiderExtension.kt
+++ /dev/null
@@ -1,16 +0,0 @@
-package io.github.wulkanowy.utils
-
-import android.view.View
-import com.mikepenz.aboutlibraries.Libs
-import com.mikepenz.aboutlibraries.LibsBuilder
-import com.mikepenz.aboutlibraries.LibsConfiguration
-
-inline fun LibsBuilder.withOnExtraListener(crossinline listener: (Libs.SpecialButton?) -> Unit): LibsBuilder {
-    withListener(object : LibsConfiguration.LibsListenerImpl() {
-        override fun onExtraClicked(v: View?, specialButton: Libs.SpecialButton?): Boolean {
-            listener(specialButton)
-            return true
-        }
-    })
-    return this
-}
diff --git a/app/src/main/java/io/github/wulkanowy/utils/ListExtension.kt b/app/src/main/java/io/github/wulkanowy/utils/ListExtension.kt
new file mode 100644
index 000000000..4374aeb41
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/utils/ListExtension.kt
@@ -0,0 +1,9 @@
+package io.github.wulkanowy.utils
+
+infix fun <T> List<T>.uniqueSubtract(other: List<T>): List<T> {
+    val list = toMutableList()
+    other.forEach {
+        list.remove(it)
+    }
+    return list.toList()
+}
diff --git a/app/src/main/java/io/github/wulkanowy/utils/LoggerUtils.kt b/app/src/main/java/io/github/wulkanowy/utils/LoggerUtils.kt
index 565374130..f9db04653 100644
--- a/app/src/main/java/io/github/wulkanowy/utils/LoggerUtils.kt
+++ b/app/src/main/java/io/github/wulkanowy/utils/LoggerUtils.kt
@@ -1,7 +1,15 @@
 package io.github.wulkanowy.utils
 
-import com.crashlytics.android.Crashlytics
+import android.app.Activity
+import android.app.Application
+import android.content.Context
+import android.os.Bundle
+import android.view.View
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentManager
 import timber.log.Timber
+import javax.inject.Inject
+import javax.inject.Singleton
 
 class DebugLogTree : Timber.DebugTree() {
 
@@ -10,13 +18,87 @@ class DebugLogTree : Timber.DebugTree() {
     }
 }
 
-class CrashlyticsTree : Timber.Tree() {
+class ActivityLifecycleLogger : Application.ActivityLifecycleCallbacks {
 
-    override fun log(priority: Int, tag: String?, message: String, t: Throwable?) {
-        Crashlytics.setInt("priority", priority)
-        Crashlytics.setString("tag", tag)
+    override fun onActivityPaused(activity: Activity?) {
+        activity?.let { Timber.d("${it::class.java.simpleName} PAUSED") }
+    }
 
-        if (t == null) Crashlytics.log(message)
-        else Crashlytics.logException(t)
+    override fun onActivityResumed(activity: Activity?) {
+        activity?.let { Timber.d("${it::class.java.simpleName} RESUMED") }
+    }
+
+    override fun onActivityStarted(activity: Activity?) {
+        activity?.let { Timber.d("${it::class.java.simpleName} STARTED") }
+    }
+
+    override fun onActivityDestroyed(activity: Activity?) {
+        activity?.let { Timber.d("${it::class.java.simpleName} DESTROYED") }
+    }
+
+    override fun onActivitySaveInstanceState(activity: Activity?, outState: Bundle?) {
+        activity?.let { Timber.d("${it::class.java.simpleName} SAVED INSTANCE STATE") }
+    }
+
+    override fun onActivityStopped(activity: Activity?) {
+        activity?.let { Timber.d("${it::class.java.simpleName} STOPPED") }
+    }
+
+    override fun onActivityCreated(activity: Activity?, savedInstanceState: Bundle?) {
+        activity?.let { Timber.d("${it::class.java.simpleName} CREATED ${checkSavedState(savedInstanceState)}") }
     }
 }
+
+@Singleton
+class FragmentLifecycleLogger @Inject constructor() : FragmentManager.FragmentLifecycleCallbacks() {
+
+    override fun onFragmentViewCreated(fm: FragmentManager, f: Fragment, v: View, savedInstanceState: Bundle?) {
+        Timber.d("${f::class.java.simpleName} VIEW CREATED ${checkSavedState(savedInstanceState)}")
+    }
+
+    override fun onFragmentStopped(fm: FragmentManager, f: Fragment) {
+        Timber.d("${f::class.java.simpleName} STOPPED")
+    }
+
+    override fun onFragmentCreated(fm: FragmentManager, f: Fragment, savedInstanceState: Bundle?) {
+        Timber.d("${f::class.java.simpleName} CREATED ${checkSavedState(savedInstanceState)}")
+    }
+
+    override fun onFragmentResumed(fm: FragmentManager, f: Fragment) {
+        Timber.d("${f::class.java.simpleName} RESUMED")
+    }
+
+    override fun onFragmentAttached(fm: FragmentManager, f: Fragment, context: Context) {
+        Timber.d("${f::class.java.simpleName} ATTACHED")
+    }
+
+    override fun onFragmentDestroyed(fm: FragmentManager, f: Fragment) {
+        Timber.d("${f::class.java.simpleName} DESTROYED")
+    }
+
+    override fun onFragmentSaveInstanceState(fm: FragmentManager, f: Fragment, outState: Bundle) {
+        Timber.d("${f::class.java.simpleName} SAVED INSTANCE STATE")
+    }
+
+    override fun onFragmentStarted(fm: FragmentManager, f: Fragment) {
+        Timber.d("${f::class.java.simpleName} STARTED")
+    }
+
+    override fun onFragmentViewDestroyed(fm: FragmentManager, f: Fragment) {
+        Timber.d("${f::class.java.simpleName} VIEW DESTROYED")
+    }
+
+    override fun onFragmentActivityCreated(fm: FragmentManager, f: Fragment, savedInstanceState: Bundle?) {
+        Timber.d("${f::class.java.simpleName} ACTIVITY CREATED ${checkSavedState(savedInstanceState)}")
+    }
+
+    override fun onFragmentPaused(fm: FragmentManager, f: Fragment) {
+        Timber.d("${f::class.java.simpleName} PAUSED")
+    }
+
+    override fun onFragmentDetached(fm: FragmentManager, f: Fragment) {
+        Timber.d("${f::class.java.simpleName} DETACHED")
+    }
+}
+
+private fun checkSavedState(savedInstanceState: Bundle?) = if (savedInstanceState == null) "(STATE IS NULL)" else ""
diff --git a/app/src/main/java/io/github/wulkanowy/utils/SchooldaysRangeLimiter.kt b/app/src/main/java/io/github/wulkanowy/utils/SchooldaysRangeLimiter.kt
new file mode 100644
index 000000000..922aafbd8
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/utils/SchooldaysRangeLimiter.kt
@@ -0,0 +1,51 @@
+package io.github.wulkanowy.utils
+
+import android.os.Parcel
+import android.os.Parcelable
+import com.wdullaer.materialdatetimepicker.date.DateRangeLimiter
+import org.threeten.bp.DayOfWeek
+import org.threeten.bp.LocalDate
+import java.util.Calendar
+
+@Suppress("UNUSED_PARAMETER")
+class SchooldaysRangeLimiter : DateRangeLimiter {
+
+    private val now = LocalDate.now()
+
+    override fun setToNearestDate(day: Calendar): Calendar = day
+
+    override fun isOutOfRange(year: Int, month: Int, day: Int): Boolean {
+        val date = LocalDate.of(year, month + 1, day)
+        val dayOfWeek = date.dayOfWeek
+        return dayOfWeek == DayOfWeek.SUNDAY || dayOfWeek == DayOfWeek.SATURDAY || date.isHolidays
+    }
+
+    override fun getStartDate(): Calendar {
+        val startYear = if (now.monthValue <= 6) now.year - 1 else now.year
+        val startOfSchoolYear = now.withYear(startYear).firstSchoolDay
+
+        val calendar = Calendar.getInstance()
+        calendar.set(startOfSchoolYear.year, startOfSchoolYear.monthValue - 1, startOfSchoolYear.dayOfMonth)
+        return calendar
+    }
+
+    override fun getEndDate(): Calendar {
+        val endYear = if (now.monthValue > 6) now.year + 1 else now.year
+        val endOfSchoolYear = now.withYear(endYear).lastSchoolDay
+
+        val calendar = Calendar.getInstance()
+        calendar.set(endOfSchoolYear.year, endOfSchoolYear.monthValue - 1, endOfSchoolYear.dayOfMonth)
+        return calendar
+    }
+
+    override fun writeToParcel(parcel: Parcel, flags: Int) {}
+
+    override fun describeContents() = 0
+
+    companion object CREATOR : Parcelable.Creator<SchooldaysRangeLimiter> {
+
+        override fun createFromParcel(parcel: Parcel): SchooldaysRangeLimiter = SchooldaysRangeLimiter()
+
+        override fun newArray(size: Int): Array<SchooldaysRangeLimiter?> = arrayOfNulls(size)
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/utils/SpinnerExtension.kt b/app/src/main/java/io/github/wulkanowy/utils/SpinnerExtension.kt
index d9e34e87c..1f7216906 100644
--- a/app/src/main/java/io/github/wulkanowy/utils/SpinnerExtension.kt
+++ b/app/src/main/java/io/github/wulkanowy/utils/SpinnerExtension.kt
@@ -7,14 +7,15 @@ import android.widget.Spinner
 /**
  * @see <a href="https://stackoverflow.com/a/29602298">How to keep onItemSelected from firing off on a newly instantiated Spinner?</a>
  */
-inline fun Spinner.setOnItemSelectedListener(crossinline listener: (view: View?) -> Unit) {
+@Suppress("UNCHECKED_CAST")
+inline fun <T : View> Spinner.setOnItemSelectedListener(crossinline listener: (view: T?) -> Unit) {
     onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
         override fun onNothingSelected(parent: AdapterView<*>?) {}
         override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
             onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
                 override fun onNothingSelected(parent: AdapterView<*>?) {}
                 override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
-                    listener(view)
+                    listener(view as T?)
                 }
             }
         }
diff --git a/app/src/main/java/io/github/wulkanowy/utils/StringExtension.kt b/app/src/main/java/io/github/wulkanowy/utils/StringExtension.kt
new file mode 100644
index 000000000..65167fd78
--- /dev/null
+++ b/app/src/main/java/io/github/wulkanowy/utils/StringExtension.kt
@@ -0,0 +1,3 @@
+package io.github.wulkanowy.utils
+
+inline fun String?.ifNullOrBlank(defaultValue: () -> String) = if (this.isNullOrBlank()) defaultValue() else this
diff --git a/app/src/main/java/io/github/wulkanowy/utils/TimeExtension.kt b/app/src/main/java/io/github/wulkanowy/utils/TimeExtension.kt
index 886b3d4da..a2672f865 100644
--- a/app/src/main/java/io/github/wulkanowy/utils/TimeExtension.kt
+++ b/app/src/main/java/io/github/wulkanowy/utils/TimeExtension.kt
@@ -6,11 +6,11 @@ import org.threeten.bp.DayOfWeek.MONDAY
 import org.threeten.bp.DayOfWeek.SATURDAY
 import org.threeten.bp.DayOfWeek.SUNDAY
 import org.threeten.bp.Instant
+import org.threeten.bp.Instant.ofEpochMilli
 import org.threeten.bp.LocalDate
 import org.threeten.bp.LocalDateTime
 import org.threeten.bp.Month
 import org.threeten.bp.ZoneId
-import org.threeten.bp.format.DateTimeFormatter
 import org.threeten.bp.format.DateTimeFormatter.ofPattern
 import org.threeten.bp.format.TextStyle.FULL_STANDALONE
 import org.threeten.bp.temporal.TemporalAdjusters.firstInMonth
@@ -21,21 +21,15 @@ import java.util.Locale
 
 private const val DATE_PATTERN = "dd.MM.yyyy"
 
-fun Date.toLocalDate(): LocalDate {
-    return Instant.ofEpochMilli(this.time).atZone(ZoneId.systemDefault()).toLocalDate()
-}
+fun Date.toLocalDate(): LocalDate = Instant.ofEpochMilli(time).atZone(ZoneId.systemDefault()).toLocalDate()
 
-fun Date.toLocalDateTime(): LocalDateTime {
-    return Instant.ofEpochMilli(this.time).atZone(ZoneId.systemDefault()).toLocalDateTime()
-}
+fun Date.toLocalDateTime(): LocalDateTime = ofEpochMilli(time).atZone(ZoneId.systemDefault()).toLocalDateTime()
 
-fun String.toLocalDate(format: String = DATE_PATTERN): LocalDate {
-    return LocalDate.parse(this, DateTimeFormatter.ofPattern(format))
-}
+fun String.toLocalDate(format: String = DATE_PATTERN): LocalDate = LocalDate.parse(this, ofPattern(format))
 
-fun LocalDate.toFormattedString(format: String = DATE_PATTERN): String = this.format(ofPattern(format))
+fun LocalDate.toFormattedString(format: String = DATE_PATTERN): String = format(ofPattern(format))
 
-fun LocalDateTime.toFormattedString(format: String = DATE_PATTERN): String = this.format(ofPattern(format))
+fun LocalDateTime.toFormattedString(format: String = DATE_PATTERN): String = format(ofPattern(format))
 
 fun LocalDateTime.toDate(): Date = DateTimeUtils.toDate(atZone(ZoneId.systemDefault()).toInstant())
 
@@ -66,59 +60,81 @@ fun Month.getFormattedName(): String {
 
 inline val LocalDate.nextSchoolDay: LocalDate
     get() {
-        return when (this.dayOfWeek) {
-            FRIDAY, SATURDAY, SUNDAY -> this.with(next(MONDAY))
-            else -> this.plusDays(1)
+        return when (dayOfWeek) {
+            FRIDAY, SATURDAY, SUNDAY -> with(next(MONDAY))
+            else -> plusDays(1)
         }
     }
 
 inline val LocalDate.previousSchoolDay: LocalDate
     get() {
-        return when (this.dayOfWeek) {
-            SATURDAY, SUNDAY, MONDAY -> this.with(previous(FRIDAY))
-            else -> this.minusDays(1)
+        return when (dayOfWeek) {
+            SATURDAY, SUNDAY, MONDAY -> with(previous(FRIDAY))
+            else -> minusDays(1)
         }
     }
 
 inline val LocalDate.nextOrSameSchoolDay: LocalDate
     get() {
-        return when (this.dayOfWeek) {
-            SATURDAY, SUNDAY -> this.with(next(MONDAY))
+        return when (dayOfWeek) {
+            SATURDAY, SUNDAY -> with(next(MONDAY))
             else -> this
         }
     }
 
 inline val LocalDate.previousOrSameSchoolDay: LocalDate
     get() {
-        return when (this.dayOfWeek) {
-            SATURDAY, SUNDAY -> this.with(previous(FRIDAY))
+        return when (dayOfWeek) {
+            SATURDAY, SUNDAY -> with(previous(FRIDAY))
             else -> this
         }
     }
 
 inline val LocalDate.weekDayName: String
-    get() = this.format(ofPattern("EEEE", Locale.getDefault()))
+    get() = format(ofPattern("EEEE", Locale.getDefault()))
+
+inline val LocalDate.shortcutWeekDayName: String
+    get() = format(ofPattern("EEE", Locale.getDefault()))
 
 inline val LocalDate.monday: LocalDate
-    get() = this.with(MONDAY)
+    get() = with(MONDAY)
 
 inline val LocalDate.friday: LocalDate
-    get() = this.with(FRIDAY)
+    get() = with(FRIDAY)
 
 /**
  * [Dz.U. 2016 poz. 1335](http://prawo.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=WDU20160001335)
  */
 
 inline val LocalDate.isHolidays: Boolean
-    get() {
-        return LocalDate.of(this.year, 9, 1).run {
-            when (dayOfWeek) {
-                FRIDAY, SATURDAY, SUNDAY -> with(firstInMonth(MONDAY))
-                else -> this
-            }
-        }.let { firstSchoolDay ->
-            LocalDate.of(this.year, 6, 20)
-                .with(next(FRIDAY))
-                .let { lastSchoolDay -> this.isBefore(firstSchoolDay) && this.isAfter(lastSchoolDay) }
+    get() = isBefore(firstSchoolDay) && isAfter(lastSchoolDay)
+
+inline val LocalDate.firstSchoolDay: LocalDate
+    get() = LocalDate.of(year, 9, 1).run {
+        when (dayOfWeek) {
+            FRIDAY, SATURDAY, SUNDAY -> with(firstInMonth(MONDAY))
+            else -> this
         }
     }
+
+inline val LocalDate.lastSchoolDay: LocalDate
+    get() = LocalDate.of(year, 6, 20)
+        .with(next(FRIDAY))
+
+
+private fun Int.getSchoolYearByMonth(monthValue: Int): Int {
+    return when (monthValue) {
+        in 9..12 -> this
+        else -> this + 1
+    }
+}
+
+fun LocalDate.getLastSchoolDayIfHoliday(schoolYear: Int): LocalDate {
+    val date = LocalDate.of(schoolYear.getSchoolYearByMonth(monthValue), monthValue, dayOfMonth)
+
+    if (date.isHolidays) {
+        return date.lastSchoolDay
+    }
+
+    return date
+}
diff --git a/app/src/main/java/io/github/wulkanowy/utils/security/Scrambler.kt b/app/src/main/java/io/github/wulkanowy/utils/security/Scrambler.kt
index 24e6d3ffa..264f45426 100644
--- a/app/src/main/java/io/github/wulkanowy/utils/security/Scrambler.kt
+++ b/app/src/main/java/io/github/wulkanowy/utils/security/Scrambler.kt
@@ -14,7 +14,6 @@ import android.security.keystore.KeyProperties.DIGEST_SHA512
 import android.security.keystore.KeyProperties.ENCRYPTION_PADDING_RSA_OAEP
 import android.security.keystore.KeyProperties.PURPOSE_DECRYPT
 import android.security.keystore.KeyProperties.PURPOSE_ENCRYPT
-import android.util.Base64
 import android.util.Base64.DEFAULT
 import android.util.Base64.decode
 import android.util.Base64.encode
@@ -60,7 +59,7 @@ fun encrypt(plainText: String, context: Context): String {
     if (plainText.isEmpty()) throw ScramblerException("Text to be encrypted is empty")
 
     if (SDK_INT < JELLY_BEAN_MR2) {
-        return String(Base64.encode(plainText.toByteArray(KEY_CHARSET), DEFAULT), KEY_CHARSET)
+        return String(encode(plainText.toByteArray(KEY_CHARSET), DEFAULT), KEY_CHARSET)
     }
 
     return try {
diff --git a/app/src/main/play/listings/pl-PL/full-description.txt b/app/src/main/play/listings/pl-PL/full-description.txt
index d33cb56f2..641b7706d 100644
--- a/app/src/main/play/listings/pl-PL/full-description.txt
+++ b/app/src/main/play/listings/pl-PL/full-description.txt
@@ -1,4 +1,4 @@
-Aplikacja jest we wczesnej fazie rozwoju, ciągle pracujemy nad kolejnymi funkcjami.
+Aplikacja jest przeznaczona dla użytkowników dziennika VULCAN UONET+.
 
 Wyróżnione cechy i funkcje:
 - obliczanie średniej ważonej,
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/1-grades.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/1-grades.png
new file mode 100644
index 000000000..56768bf57
Binary files /dev/null and b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/1-grades.png differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/2-timetable-dialog.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/2-timetable-dialog.png
new file mode 100644
index 000000000..83d9353ae
Binary files /dev/null and b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/2-timetable-dialog.png differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/3-exams.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/3-exams.png
new file mode 100644
index 000000000..f83a7af8b
Binary files /dev/null and b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/3-exams.png differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/4-timetable-widget.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/4-timetable-widget.png
new file mode 100644
index 000000000..90d5fef4f
Binary files /dev/null and b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/4-timetable-widget.png differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/5-messages.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/5-messages.png
new file mode 100644
index 000000000..eadbf2db2
Binary files /dev/null and b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/5-messages.png differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/6-account-switcher.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/6-account-switcher.png
new file mode 100644
index 000000000..2a11a3db9
Binary files /dev/null and b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/6-account-switcher.png differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/7-class-grades.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/7-class-grades.png
new file mode 100644
index 000000000..d9b2f1c76
Binary files /dev/null and b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/7-class-grades.png differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/account-switcher.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/account-switcher.png
deleted file mode 100644
index 8a52d8de8..000000000
Binary files a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/account-switcher.png and /dev/null differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/attendance-dialog.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/attendance-dialog.png
deleted file mode 100644
index c65085747..000000000
Binary files a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/attendance-dialog.png and /dev/null differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/attendance-statistics.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/attendance-statistics.png
deleted file mode 100644
index 376fc3c3f..000000000
Binary files a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/attendance-statistics.png and /dev/null differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/grades.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/grades.png
deleted file mode 100644
index 6b4089b02..000000000
Binary files a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/grades.png and /dev/null differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/more.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/more.png
deleted file mode 100644
index c3dc523ff..000000000
Binary files a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/more.png and /dev/null differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/timetable-dialog.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/timetable-dialog.png
deleted file mode 100644
index 511433d45..000000000
Binary files a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/timetable-dialog.png and /dev/null differ
diff --git a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/timetable-widget.png b/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/timetable-widget.png
deleted file mode 100644
index 1d5024707..000000000
Binary files a/app/src/main/play/listings/pl-PL/graphics/phone-screenshots/timetable-widget.png and /dev/null differ
diff --git a/app/src/main/play/release-notes/pl-PL/default.txt b/app/src/main/play/release-notes/pl-PL/default.txt
index 785769037..47c30e792 100644
--- a/app/src/main/play/release-notes/pl-PL/default.txt
+++ b/app/src/main/play/release-notes/pl-PL/default.txt
@@ -1,9 +1,8 @@
-Wersja 0.7.5
+Wersja 0.14.1
 
-Naprawiliśmy:
-- problem z brakiem aktywnego semestru (jeśli doświadczysz jakichś problemów - wyloguj i zaloguj się ponownie)
-- logowanie w niestandardowych dziennikach na vulcan.net.pl
-- oznaczanie lekcji w planie jako odwołanej, jeśli brak opisu tej zmiany
-- ładowanie wiadomości, jeśli byli zalogowani jednocześnie uczeń i rodzic
+- naprawiliśmy logowanie użytkownikom, którzy mieli przypisanych do konta uczniów ze szkół z wyłączonymi dziennikami
+- naprawiliśmy problemy z wysyłaniem wiadomości i odświeżaniem ocen spowodowanych ostatnią aktualizacją
+- dodaliśmy informację o liczbie nieprzeczytanych ocen w nagłówku przedmiotu
+- ulepszyliśmy informacje o błędach przy logowaniu w trybie mobilnym
 
-Pełna lista zmian: https://github.com/wulkanowy/wulkanowy/releases/tag/0.7.5
+Pełna lista zmian: https://github.com/wulkanowy/wulkanowy/releases
diff --git a/app/src/main/res/drawable-anydpi-v24/ic_stat_grade.xml b/app/src/main/res/drawable-anydpi-v24/ic_stat_grade.xml
new file mode 100644
index 000000000..2774dd5dd
--- /dev/null
+++ b/app/src/main/res/drawable-anydpi-v24/ic_stat_grade.xml
@@ -0,0 +1,13 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="28.26087"
+    android:viewportHeight="28.26087">
+    <group
+        android:translateX="1.1304348"
+        android:translateY="1.1304348">
+        <path
+            android:fillColor="#FFF"
+            android:pathData="M13 11h2v2h-2m0 2h2a2 2 0 0 0 2-2v-2a2 2 0 0 0-2-2h-2V7h4V5h-4a2 2 0 0 0-2 2v6c0 1.1 0.9 2 2 2m8 2H7V3h14m0-2H7a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2V3a2 2 0 0 0-2-2M3 5H1v16a2 2 0 0 0 2 2h16v-2H3V5z" />
+    </group>
+</vector>
diff --git a/app/src/main/res/drawable-anydpi-v24/ic_stat_luckynumber.xml b/app/src/main/res/drawable-anydpi-v24/ic_stat_luckynumber.xml
new file mode 100644
index 000000000..4699c4576
--- /dev/null
+++ b/app/src/main/res/drawable-anydpi-v24/ic_stat_luckynumber.xml
@@ -0,0 +1,13 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="26.086956"
+    android:viewportHeight="26.086956">
+    <group
+        android:translateX="1.0434783"
+        android:translateY="1.0434783">
+        <path
+            android:fillColor="#FFF"
+            android:pathData="M12,11.18C15.3,8.18 17,6.64 17,4.69C17,3.19 15.75,2 14.25,2C13.39,2 12.57,2.36 12,3C11.43,2.36 10.61,2 9.69,2C8.19,2 7,3.25 7,4.75C7,6.64 8.7,8.18 12,11.18M11.18,12C8.18,8.7 6.64,7 4.69,7C3.19,7 2,8.25 2, 9.75C2,10.61 2.36,11.43 3,12C2.36,12.57 2,13.39 2,14.31C2,15.81 3.25,17 4.75,17C6.64,17 8.18,15.3 11.18,12M12.83, 12C15.82,15.3 17.36,17 19.31,17C20.81,17 22,15.75 22,14.25C22,13.39 21.64,12.57 21,12C21.64,11.43 22,10.61 22,9.69C22, 8.19 20.75,7 19.25,7C17.36,7 15.82,8.7 12.83,12M12,12.82C8.7,15.82 7,17.36 7,19.31C7,20.81 8.25,22 9.75,22C10.61,22 11.43,21.64 12,21C12.57,21.64 13.39,22 14.31,22C15.81,22 17,20.75 17,19.25C17,17.36 15.3,15.82 12,12.82Z" />
+    </group>
+</vector>
diff --git a/app/src/main/res/drawable-anydpi-v24/ic_stat_message.xml b/app/src/main/res/drawable-anydpi-v24/ic_stat_message.xml
new file mode 100644
index 000000000..cb42d7cc2
--- /dev/null
+++ b/app/src/main/res/drawable-anydpi-v24/ic_stat_message.xml
@@ -0,0 +1,13 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="26.086956"
+    android:viewportHeight="26.086956">
+    <group
+        android:translateX="1.0434783"
+        android:translateY="1.0434783">
+        <path
+            android:fillColor="#FFF"
+            android:pathData="M20,2L4,2c-1.1,0 -1.99,0.9 -1.99,2L2,22l4,-4h14c1.1,0 2,-0.9 2,-2L22,4c0,-1.1 -0.9,-2 -2,-2zM18,14L6,14v-2h12v2zM18,11L6,11L6,9h12v2zM18,8L6,8L6,6h12v2z" />
+    </group>
+</vector>
diff --git a/app/src/main/res/drawable-anydpi-v24/ic_stat_note.xml b/app/src/main/res/drawable-anydpi-v24/ic_stat_note.xml
new file mode 100644
index 000000000..d6b0d4d17
--- /dev/null
+++ b/app/src/main/res/drawable-anydpi-v24/ic_stat_note.xml
@@ -0,0 +1,13 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="26.086956"
+    android:viewportHeight="26.086956">
+    <group
+        android:translateX="1.0434783"
+        android:translateY="1.0434783">
+        <path
+            android:fillColor="#FFF"
+            android:pathData="M20.2,2H19.5H18C17.1,2 16,3 16,4H8C8,3 6.9,2 6,2H4.5H3.8H2V11C2,12 3,13 4,13H6.2C6.6,15 7.9,16.7 11,17V19.1C8.8,19.3 8,20.4 8,21.7V22H16V21.7C16,20.4 15.2,19.3 13,19.1V17C16.1,16.7 17.4,15 17.8,13H20C21,13 22,12 22,11V2H20.2M4,11V4H6V6V11C5.1,11 4.3,11 4,11M20,11C19.7,11 18.9,11 18,11V6V4H20V11Z" />
+    </group>
+</vector>
diff --git a/app/src/main/res/drawable-anydpi-v24/ic_stat_notify_lucky_number.xml b/app/src/main/res/drawable-anydpi-v24/ic_stat_notify_lucky_number.xml
deleted file mode 100644
index 00538168f..000000000
--- a/app/src/main/res/drawable-anydpi-v24/ic_stat_notify_lucky_number.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="26.086956"
-    android:viewportHeight="26.086956"
-    android:tint="#FFFFFF">
-    <group
-        android:translateX="1.0434783"
-        android:translateY="1.0434783">
-        <path
-            android:fillColor="#FFFFFF"
-            android:pathData="M12,11.18C15.3,8.18 17,6.64 17,4.69C17,3.19 15.75,2 14.25,2C13.39,2 12.57,2.36 12,3C11.43,2.36 10.61,2 9.69,2C8.19,2 7,3.25 7,4.75C7,6.64 8.7,8.18 12,11.18M11.18,12C8.18,8.7 6.64,7 4.69,7C3.19,7 2,8.25 2,9.75C2,10.61 2.36,11.43 3,12C2.36,12.57 2,13.39 2,14.31C2,15.81 3.25,17 4.75,17C6.64,17 8.18,15.3 11.18,12M12.83,12C15.82,15.3 17.36,17 19.31,17C20.81,17 22,15.75 22,14.25C22,13.39 21.64,12.57 21,12C21.64,11.43 22,10.61 22,9.69C22,8.19 20.75,7 19.25,7C17.36,7 15.82,8.7 12.83,12M12,12.82C8.7,15.82 7,17.36 7,19.31C7,20.81 8.25,22 9.75,22C10.61,22 11.43,21.64 12,21C12.57,21.64 13.39,22 14.31,22C15.81,22 17,20.75 17,19.25C17,17.36 15.3,15.82 12,12.82Z" />
-    </group>
-</vector>
diff --git a/app/src/main/res/drawable-hdpi/ic_stat_grade.png b/app/src/main/res/drawable-hdpi/ic_stat_grade.png
new file mode 100644
index 000000000..d97efb5d4
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/ic_stat_grade.png differ
diff --git a/app/src/main/res/drawable-hdpi/ic_stat_notify_lucky_number.png b/app/src/main/res/drawable-hdpi/ic_stat_luckynumber.png
similarity index 100%
rename from app/src/main/res/drawable-hdpi/ic_stat_notify_lucky_number.png
rename to app/src/main/res/drawable-hdpi/ic_stat_luckynumber.png
diff --git a/app/src/main/res/drawable-hdpi/ic_stat_message.png b/app/src/main/res/drawable-hdpi/ic_stat_message.png
new file mode 100644
index 000000000..ce0fdabcb
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/ic_stat_message.png differ
diff --git a/app/src/main/res/drawable-hdpi/ic_stat_note.png b/app/src/main/res/drawable-hdpi/ic_stat_note.png
new file mode 100644
index 000000000..7318c4195
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/ic_stat_note.png differ
diff --git a/app/src/main/res/drawable-hdpi/ic_stat_notify_grade.png b/app/src/main/res/drawable-hdpi/ic_stat_notify_grade.png
deleted file mode 100644
index ea5b85c82..000000000
Binary files a/app/src/main/res/drawable-hdpi/ic_stat_notify_grade.png and /dev/null differ
diff --git a/app/src/main/res/drawable-hdpi/ic_stat_notify_message.png b/app/src/main/res/drawable-hdpi/ic_stat_notify_message.png
deleted file mode 100644
index 86d63c587..000000000
Binary files a/app/src/main/res/drawable-hdpi/ic_stat_notify_message.png and /dev/null differ
diff --git a/app/src/main/res/drawable-hdpi/ic_stat_notify_note.png b/app/src/main/res/drawable-hdpi/ic_stat_notify_note.png
deleted file mode 100644
index b49e4ad2c..000000000
Binary files a/app/src/main/res/drawable-hdpi/ic_stat_notify_note.png and /dev/null differ
diff --git a/app/src/main/res/drawable-hdpi/ic_widget_account.png b/app/src/main/res/drawable-hdpi/ic_widget_account.png
new file mode 100644
index 000000000..4cb5ac89e
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/ic_widget_account.png differ
diff --git a/app/src/main/res/drawable-mdpi/ic_stat_grade.png b/app/src/main/res/drawable-mdpi/ic_stat_grade.png
new file mode 100644
index 000000000..c85b2702c
Binary files /dev/null and b/app/src/main/res/drawable-mdpi/ic_stat_grade.png differ
diff --git a/app/src/main/res/drawable-mdpi/ic_stat_notify_lucky_number.png b/app/src/main/res/drawable-mdpi/ic_stat_luckynumber.png
similarity index 100%
rename from app/src/main/res/drawable-mdpi/ic_stat_notify_lucky_number.png
rename to app/src/main/res/drawable-mdpi/ic_stat_luckynumber.png
diff --git a/app/src/main/res/drawable-mdpi/ic_stat_message.png b/app/src/main/res/drawable-mdpi/ic_stat_message.png
new file mode 100644
index 000000000..b357b3210
Binary files /dev/null and b/app/src/main/res/drawable-mdpi/ic_stat_message.png differ
diff --git a/app/src/main/res/drawable-mdpi/ic_stat_note.png b/app/src/main/res/drawable-mdpi/ic_stat_note.png
new file mode 100644
index 000000000..55a4fbbf4
Binary files /dev/null and b/app/src/main/res/drawable-mdpi/ic_stat_note.png differ
diff --git a/app/src/main/res/drawable-mdpi/ic_stat_notify_grade.png b/app/src/main/res/drawable-mdpi/ic_stat_notify_grade.png
deleted file mode 100644
index 64fd285d6..000000000
Binary files a/app/src/main/res/drawable-mdpi/ic_stat_notify_grade.png and /dev/null differ
diff --git a/app/src/main/res/drawable-mdpi/ic_stat_notify_message.png b/app/src/main/res/drawable-mdpi/ic_stat_notify_message.png
deleted file mode 100644
index 73a1653a0..000000000
Binary files a/app/src/main/res/drawable-mdpi/ic_stat_notify_message.png and /dev/null differ
diff --git a/app/src/main/res/drawable-mdpi/ic_stat_notify_note.png b/app/src/main/res/drawable-mdpi/ic_stat_notify_note.png
deleted file mode 100644
index 3498f71c3..000000000
Binary files a/app/src/main/res/drawable-mdpi/ic_stat_notify_note.png and /dev/null differ
diff --git a/app/src/main/res/drawable-mdpi/ic_widget_account.png b/app/src/main/res/drawable-mdpi/ic_widget_account.png
new file mode 100644
index 000000000..237a6b6c2
Binary files /dev/null and b/app/src/main/res/drawable-mdpi/ic_widget_account.png differ
diff --git a/app/src/main/res/drawable-night/ic_all_divider.xml b/app/src/main/res/drawable-night/ic_all_divider.xml
index ca44eb29e..cd444a285 100644
--- a/app/src/main/res/drawable-night/ic_all_divider.xml
+++ b/app/src/main/res/drawable-night/ic_all_divider.xml
@@ -5,5 +5,5 @@
         android:angle="270"
         android:centerColor="@android:color/transparent"
         android:centerX="0.01"
-        android:startColor="#494949" />
+        android:startColor="@color/colorDividerInverse" />
 </shape>
diff --git a/app/src/main/res/drawable-v23/layer_splash_background.xml b/app/src/main/res/drawable-v23/layer_splash_background.xml
index 5fa58e900..1b4b64ec9 100644
--- a/app/src/main/res/drawable-v23/layer_splash_background.xml
+++ b/app/src/main/res/drawable-v23/layer_splash_background.xml
@@ -1,12 +1,12 @@
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item>
         <shape>
-            <solid android:color="#9a0007" />
+            <solid android:color="@color/colorPrimaryDark" />
         </shape>
     </item>
     <item
         android:width="200dp"
         android:height="200dp"
-        android:gravity="center"
-        android:drawable="@drawable/img_splash_logo" />
+        android:drawable="@drawable/img_splash_logo"
+        android:gravity="center" />
 </layer-list>
diff --git a/app/src/main/res/drawable-xhdpi/ic_stat_grade.png b/app/src/main/res/drawable-xhdpi/ic_stat_grade.png
new file mode 100644
index 000000000..c55ca7fdd
Binary files /dev/null and b/app/src/main/res/drawable-xhdpi/ic_stat_grade.png differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_stat_notify_lucky_number.png b/app/src/main/res/drawable-xhdpi/ic_stat_luckynumber.png
similarity index 100%
rename from app/src/main/res/drawable-xhdpi/ic_stat_notify_lucky_number.png
rename to app/src/main/res/drawable-xhdpi/ic_stat_luckynumber.png
diff --git a/app/src/main/res/drawable-xhdpi/ic_stat_message.png b/app/src/main/res/drawable-xhdpi/ic_stat_message.png
new file mode 100644
index 000000000..0e67ade37
Binary files /dev/null and b/app/src/main/res/drawable-xhdpi/ic_stat_message.png differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_stat_note.png b/app/src/main/res/drawable-xhdpi/ic_stat_note.png
new file mode 100644
index 000000000..ea674a793
Binary files /dev/null and b/app/src/main/res/drawable-xhdpi/ic_stat_note.png differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_stat_notify_grade.png b/app/src/main/res/drawable-xhdpi/ic_stat_notify_grade.png
deleted file mode 100644
index 83b2c443a..000000000
Binary files a/app/src/main/res/drawable-xhdpi/ic_stat_notify_grade.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_stat_notify_message.png b/app/src/main/res/drawable-xhdpi/ic_stat_notify_message.png
deleted file mode 100644
index b373ffd4a..000000000
Binary files a/app/src/main/res/drawable-xhdpi/ic_stat_notify_message.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_stat_notify_note.png b/app/src/main/res/drawable-xhdpi/ic_stat_notify_note.png
deleted file mode 100644
index 5aa30e5f7..000000000
Binary files a/app/src/main/res/drawable-xhdpi/ic_stat_notify_note.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_widget_account.png b/app/src/main/res/drawable-xhdpi/ic_widget_account.png
new file mode 100644
index 000000000..0ea798a8a
Binary files /dev/null and b/app/src/main/res/drawable-xhdpi/ic_widget_account.png differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_stat_grade.png b/app/src/main/res/drawable-xxhdpi/ic_stat_grade.png
new file mode 100644
index 000000000..eeb6fa41b
Binary files /dev/null and b/app/src/main/res/drawable-xxhdpi/ic_stat_grade.png differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_stat_notify_lucky_number.png b/app/src/main/res/drawable-xxhdpi/ic_stat_luckynumber.png
similarity index 100%
rename from app/src/main/res/drawable-xxhdpi/ic_stat_notify_lucky_number.png
rename to app/src/main/res/drawable-xxhdpi/ic_stat_luckynumber.png
diff --git a/app/src/main/res/drawable-xxhdpi/ic_stat_message.png b/app/src/main/res/drawable-xxhdpi/ic_stat_message.png
new file mode 100644
index 000000000..2e8818242
Binary files /dev/null and b/app/src/main/res/drawable-xxhdpi/ic_stat_message.png differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_stat_note.png b/app/src/main/res/drawable-xxhdpi/ic_stat_note.png
new file mode 100644
index 000000000..174e1509b
Binary files /dev/null and b/app/src/main/res/drawable-xxhdpi/ic_stat_note.png differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_stat_notify_grade.png b/app/src/main/res/drawable-xxhdpi/ic_stat_notify_grade.png
deleted file mode 100644
index cba48ec20..000000000
Binary files a/app/src/main/res/drawable-xxhdpi/ic_stat_notify_grade.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_stat_notify_message.png b/app/src/main/res/drawable-xxhdpi/ic_stat_notify_message.png
deleted file mode 100644
index dc15bbd96..000000000
Binary files a/app/src/main/res/drawable-xxhdpi/ic_stat_notify_message.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_stat_notify_note.png b/app/src/main/res/drawable-xxhdpi/ic_stat_notify_note.png
deleted file mode 100644
index db3ec517b..000000000
Binary files a/app/src/main/res/drawable-xxhdpi/ic_stat_notify_note.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_widget_account.png b/app/src/main/res/drawable-xxhdpi/ic_widget_account.png
new file mode 100644
index 000000000..0f8933b17
Binary files /dev/null and b/app/src/main/res/drawable-xxhdpi/ic_widget_account.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/ic_stat_notify_message.png b/app/src/main/res/drawable-xxxhdpi/ic_stat_notify_message.png
deleted file mode 100644
index 3b40ad3f1..000000000
Binary files a/app/src/main/res/drawable-xxxhdpi/ic_stat_notify_message.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xxxhdpi/ic_stat_notify_note.png b/app/src/main/res/drawable-xxxhdpi/ic_stat_notify_note.png
deleted file mode 100644
index 06a9299a9..000000000
Binary files a/app/src/main/res/drawable-xxxhdpi/ic_stat_notify_note.png and /dev/null differ
diff --git a/app/src/main/res/drawable/background_header_note.xml b/app/src/main/res/drawable/background_header_note.xml
new file mode 100644
index 000000000..b6555847b
--- /dev/null
+++ b/app/src/main/res/drawable/background_header_note.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="?colorPrimary"/>
+    <corners android:radius="12dp"/>
+</shape>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/background_luckynumber_widget.xml b/app/src/main/res/drawable/background_luckynumber_widget.xml
new file mode 100644
index 000000000..f29744d0c
--- /dev/null
+++ b/app/src/main/res/drawable/background_luckynumber_widget.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@android:color/white" />
+    <corners android:radius="5dp" />
+</shape>
diff --git a/app/src/main/res/drawable/background_luckynumber_widget_dark.xml b/app/src/main/res/drawable/background_luckynumber_widget_dark.xml
new file mode 100644
index 000000000..fa15fd857
--- /dev/null
+++ b/app/src/main/res/drawable/background_luckynumber_widget_dark.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/colorWidgetBackground" />
+    <corners android:radius="5dp" />
+</shape>
diff --git a/app/src/main/res/drawable/ic_about_discord.xml b/app/src/main/res/drawable/ic_about_discord.xml
new file mode 100644
index 000000000..bcca42bf1
--- /dev/null
+++ b/app/src/main/res/drawable/ic_about_discord.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M9.375,4.031 L8.75,4.094c0,0 -2.742,0.296 -4.75,1.875L3.969,5.969L3.938,6C3.488,6.406 3.308,6.898 3,7.625 2.6336,8.5013 2.3203,9.399 2.062,10.313 1.478,12.37 1,14.843 1,17.125v0.219l0.094,0.187c0.726,1.246 2.023,2.047 3.218,2.594 1.196,0.547 2.223,0.82 2.938,0.844L7.719,21 8.812,18.656C9.722,18.856 10.797,19 12,19c1.203,0 2.246,-0.145 3.156,-0.344L16.25,21 16.719,20.969c0.715,-0.024 1.742,-0.297 2.937,-0.844 1.196,-0.547 2.492,-1.348 3.219,-2.594l0.094,-0.187v-0.219c0,-2.281 -0.446,-4.754 -1.032,-6.813C21.6789,9.3987 21.366,8.5017 21,7.626 20.691,6.899 20.48,6.407 20.031,6.001L20,5.969C17.992,4.391 15.219,4.094 15.219,4.094L14.625,4.031c0,0 -0.453,1.516 -0.594,2.157C13.3576,6.0959 12.6795,6.0432 12,6.03 11.582,6.03 10.86,6.07 9.969,6.187 9.829,5.546 9.375,4.03 9.375,4.03ZM8.125,6.188C8.16,6.289 8.223,6.418 8.25,6.5L9.1478,8.2815C10.3888,8.0461 11.5032,8 12,8c0.5086,0 1.6647,0.0483 2.9411,0.2987L15.813,6.5c0.027,-0.082 0.12,-0.21 0.156,-0.313 1.0837,0.1962 2.1092,0.6344 3,1.282 -0.008,0.004 0.324,0.406 0.593,1 0.278,0.61 0.567,1.426 0.844,2.344 0.532,1.761 0.934,4.082 0.969,5.968 -0.492,0.696 -1.406,1.336 -2.375,1.75 -0.848,0.364 -1.29,0.496 -1.688,0.563l-0.406,-0.875c0.23,-0.078 0.27,-0.074 0.469,-0.157 1.207,-0.488 1.844,-1.03 1.844,-1.03l-0.813,-1.563c0,0 -0.441,0.367 -1.468,0.781C15.91,16.664 14.133,17.094 12,17.094 9.867,17.094 8.469,16.664 7.437,16.25 6.407,15.836 5.969,15.469 5.969,15.469L4.75,17.03c0,0 0.668,0.543 1.875,1.032 0.2,0.082 0.266,0.078 0.5,0.156L6.687,19.093C6.289,19.026 5.817,18.893 4.969,18.53 3.996,18.112 3.086,17.476 2.594,16.78 2.629,14.894 3.031,12.573 3.563,10.812 3.84,9.894 4.16,9.077 4.437,8.468 4.707,7.874 5.007,7.472 5,7.468 6.156,6.628 7.395,6.323 8.125,6.187ZM9.5,11C8.672,11 8,11.895 8,13c0,1.105 0.672,2 1.5,2 0.828,0 1.5,-0.895 1.5,-2 0,-1.105 -0.672,-2 -1.5,-2zM14.5,11c-0.828,0 -1.5,0.895 -1.5,2 0,1.105 0.672,2 1.5,2 0.828,0 1.5,-0.895 1.5,-2 0,-1.105 -0.672,-2 -1.5,-2z"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_about_faq.xml b/app/src/main/res/drawable/ic_about_faq.xml
new file mode 100644
index 000000000..d6ab255b2
--- /dev/null
+++ b/app/src/main/res/drawable/ic_about_faq.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M11,18H13V16H11V18M12,2A10,10 0,0 0,2 12A10,10 0,0 0,12 22A10,10 0,0 0,22 12A10,10 0,0 0,12 2M12,20C7.59,20 4,16.41 4,12C4,7.59 7.59,4 12,4C16.41,4 20,7.59 20,12C20,16.41 16.41,20 12,20M12,6A4,4 0,0 0,8 10H10A2,2 0,0 1,12 8A2,2 0,0 1,14 10C14,12 11,11.75 11,15H13C13,12.75 16,12.5 16,10A4,4 0,0 0,12 6Z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_about_feedback.xml b/app/src/main/res/drawable/ic_about_feedback.xml
new file mode 100644
index 000000000..a348cb6a3
--- /dev/null
+++ b/app/src/main/res/drawable/ic_about_feedback.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M20,8h-2.81c-0.45,-0.78 -1.07,-1.45 -1.82,-1.96L17,4.41 15.59,3l-2.17,2.17C12.96,5.06 12.49,5 12,5s-0.96,0.06 -1.41,0.17L8.41,3 7,4.41l1.62,1.63C7.88,6.55 7.26,7.22 6.81,8L4,8v2h2.09c-0.05,0.33 -0.09,0.66 -0.09,1v1L4,12v2h2v1c0,0.34 0.04,0.67 0.09,1L4,16v2h2.81c1.04,1.79 2.97,3 5.19,3s4.15,-1.21 5.19,-3L20,18v-2h-2.09c0.05,-0.33 0.09,-0.66 0.09,-1v-1h2v-2h-2v-1c0,-0.34 -0.04,-0.67 -0.09,-1L20,10L20,8zM16,12v3c0,0.22 -0.03,0.47 -0.07,0.7l-0.1,0.65 -0.37,0.65c-0.72,1.24 -2.04,2 -3.46,2s-2.74,-0.77 -3.46,-2l-0.37,-0.64 -0.1,-0.65C8.03,15.48 8,15.23 8,15v-4c0,-0.23 0.03,-0.48 0.07,-0.7l0.1,-0.65 0.37,-0.65c0.3,-0.52 0.72,-0.97 1.21,-1.31l0.57,-0.39 0.74,-0.18c0.31,-0.08 0.63,-0.12 0.94,-0.12 0.32,0 0.63,0.04 0.95,0.12l0.68,0.16 0.61,0.42c0.5,0.34 0.91,0.78 1.21,1.31l0.38,0.65 0.1,0.65c0.04,0.22 0.07,0.47 0.07,0.69v1zM10,14h4v2h-4zM10,10h4v2h-4z"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_message_reply_24dp.xml b/app/src/main/res/drawable/ic_about_homepage.xml
similarity index 56%
rename from app/src/main/res/drawable/ic_message_reply_24dp.xml
rename to app/src/main/res/drawable/ic_about_homepage.xml
index 010cb250b..1ec608120 100644
--- a/app/src/main/res/drawable/ic_message_reply_24dp.xml
+++ b/app/src/main/res/drawable/ic_about_homepage.xml
@@ -1,10 +1,9 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
-    android:tint="#FFFFFF"
     android:viewportWidth="24.0"
     android:viewportHeight="24.0">
     <path
-        android:fillColor="#FF000000"
-        android:pathData="M10,9V5l-7,7 7,7v-4.1c5,0 8.5,1.6 11,5.1 -1,-5 -4,-10 -11,-11z" />
+        android:fillColor="#FFF"
+        android:pathData="M12,5.69l5,4.5V18h-2v-6H9v6H7v-7.81l5,-4.5M12,3L2,12h3v8h6v-6h2v6h6v-8h3L12,3z"/>
 </vector>
diff --git a/app/src/main/res/drawable/ic_about_licenses.xml b/app/src/main/res/drawable/ic_about_licenses.xml
new file mode 100644
index 000000000..1a052734c
--- /dev/null
+++ b/app/src/main/res/drawable/ic_about_licenses.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M12,3a3,3 0,0 0,-2.8 2H3v2h2l-3,7c-0.5,2 1,3 3.5,3s4,-1 3.5,-3L6,7h3.2c0.3,0.8 1,1.5 1.8,1.8V20H2v2h20v-2h-9V8.8A3,3 0,0 0,14.8 7H18L15,14c-0.5,2 1,3 3.5,3s4,-1 3.5,-3l-3,-7h2V5h-6.2A3, 3 0,0 0,12 3m0,2a1,1 0,0 1,1 1,1 1,0 0,1 -1,1 1,1 0,0 1,-1 -1,1 1,0 0,1 1,-1m-6.5,5.3L7,14H4l1.5,-3.8m13,0L20, 14h-3l1.5,-3.8z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_about_privacy.xml b/app/src/main/res/drawable/ic_about_privacy.xml
new file mode 100644
index 000000000..109f05df8
--- /dev/null
+++ b/app/src/main/res/drawable/ic_about_privacy.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+  <path
+      android:fillColor="#FFF"
+      android:pathData="M18,8h-1L17,6c0,-2.76 -2.24,-5 -5,-5S7,3.24 7,6v2L6,8c-1.1,0 -2,0.9 -2,2v10c0,1.1 0.9,2 2,2h12c1.1,0 2,-0.9 2,-2L20,10c0,-1.1 -0.9,-2 -2,-2zM9,6c0,-1.66 1.34,-3 3,-3s3,1.34 3,3v2L9,8L9,6zM18,20L6,20L6,10h12v10zM12,17c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2z"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_account_circular_border.xml b/app/src/main/res/drawable/ic_account_circular_border.xml
deleted file mode 100644
index 8ba66975a..000000000
--- a/app/src/main/res/drawable/ic_account_circular_border.xml
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape xmlns:android="http://schemas.android.com/apk/res/android"
-    android:shape="oval">
-    <solid android:color="@android:color/transparent" />
-    <stroke
-        android:width="3dp"
-        android:color="@color/colorPrimary" />
-</shape>
diff --git a/app/src/main/res/drawable/ic_all_about_24dp.xml b/app/src/main/res/drawable/ic_all_about.xml
similarity index 69%
rename from app/src/main/res/drawable/ic_all_about_24dp.xml
rename to app/src/main/res/drawable/ic_all_about.xml
index 550f312e8..3dfbbda19 100644
--- a/app/src/main/res/drawable/ic_all_about_24dp.xml
+++ b/app/src/main/res/drawable/ic_all_about.xml
@@ -1,12 +1,12 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
-    android:viewportHeight="24"
-    android:viewportWidth="24">
+    android:viewportWidth="24"
+    android:viewportHeight="24">
     <path
-        android:fillColor="#FFFFFFFF"
+        android:fillColor="#FFF"
         android:pathData="M11,7h2v2h-2zM11,11h2v6h-2z" />
     <path
-        android:fillColor="#FFFFFFFF"
+        android:fillColor="#FFF"
         android:pathData="M12,2a10,10 0,1 0,0 20,10 10,0 0,0 0,-20zM12,20a8,8 0,1 1,0 -16,8 8,0 0,1 0,16z" />
 </vector>
diff --git a/app/src/main/res/drawable/ic_all_account.xml b/app/src/main/res/drawable/ic_all_account.xml
new file mode 100644
index 000000000..0e917d5f9
--- /dev/null
+++ b/app/src/main/res/drawable/ic_all_account.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM7.07,18.28c0.43,-0.9 3.05,-1.78 4.93,-1.78s4.51,0.88 4.93,1.78C15.57,19.36 13.86,20 12,20s-3.57,-0.64 -4.93,-1.72zM18.36,16.83c-1.43,-1.74 -4.9,-2.33 -6.36,-2.33s-4.93,0.59 -6.36,2.33C4.62,15.49 4,13.82 4,12c0,-4.41 3.59,-8 8,-8s8,3.59 8,8c0,1.82 -0.62,3.49 -1.64,4.83zM12,6c-1.94,0 -3.5,1.56 -3.5,3.5S10.06,13 12,13s3.5,-1.56 3.5,-3.5S13.94,6 12,6zM12,11c-0.83,0 -1.5,-0.67 -1.5,-1.5S11.17,8 12,8s1.5,0.67 1.5,1.5S12.83,11 12,11z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_all_account_24dp.xml b/app/src/main/res/drawable/ic_all_account_24dp.xml
deleted file mode 100644
index dea10cb34..000000000
--- a/app/src/main/res/drawable/ic_all_account_24dp.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24.0"
-    android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2
-            12,2zM12,5c1.66,0 3,1.34 3,3s-1.34,3 -3,3 -3,-1.34 -3,-3 1.34,-3 3,-3zM12,19.2c-2.5,0 -4.71,-1.28 -6,-3.22
-            0.03,-1.99 4,-3.08 6,-3.08 1.99,0 5.97,1.09 6,3.08 -1.29,1.94 -3.5,3.22 -6,3.22z" />
-</vector>
diff --git a/app/src/main/res/drawable/ic_menu_send_message_24dp.xml b/app/src/main/res/drawable/ic_all_add.xml
similarity index 60%
rename from app/src/main/res/drawable/ic_menu_send_message_24dp.xml
rename to app/src/main/res/drawable/ic_all_add.xml
index fcc5acfb0..e45662935 100644
--- a/app/src/main/res/drawable/ic_menu_send_message_24dp.xml
+++ b/app/src/main/res/drawable/ic_all_add.xml
@@ -1,10 +1,9 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
-    android:tint="#FFFFFF"
     android:viewportWidth="24.0"
     android:viewportHeight="24.0">
     <path
-        android:fillColor="#FF000000"
-        android:pathData="M2.01,21L23,12 2.01,3 2,10l15,2 -15,2z" />
+        android:fillColor="#FFF"
+        android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z" />
 </vector>
diff --git a/app/src/main/res/drawable/ic_all_close_circle_24dp.xml b/app/src/main/res/drawable/ic_all_close_circle.xml
similarity index 69%
rename from app/src/main/res/drawable/ic_all_close_circle_24dp.xml
rename to app/src/main/res/drawable/ic_all_close_circle.xml
index 3809c7979..3f89a8fa3 100644
--- a/app/src/main/res/drawable/ic_all_close_circle_24dp.xml
+++ b/app/src/main/res/drawable/ic_all_close_circle.xml
@@ -4,6 +4,6 @@
     android:viewportWidth="24"
     android:viewportHeight="24">
     <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M12,20C7.59,20 4,16.41 4,12C4,7.59 7.59,4 12,4C16.41,4 20,7.59 20,12C20,16.41 16.41,20 12,20M12,2C6.47,2 2,6.47 2,12C2,17.53 6.47,22 12,22C17.53,22 22,17.53 22,12C22,6.47 17.53,2 12,2M14.59,8L12,10.59L9.41,8L8,9.41L10.59,12L8,14.59L9.41,16L12,13.41L14.59,16L16,14.59L13.41,12L16,9.41L14.59,8Z" />
+        android:fillColor="#FFF"
+        android:pathData="M12,20C7.59,20 4,16.41 4,12C4,7.59 7.59,4 12,4C16.41,4 20,7.59 20,12C20,16.41 16.41,20 12,20M12,2C6.47,2 2,6.47 2,12C2,17.53 6.47,22 12,22C17.53,22 22,17.53 22,12C22,6.47 17.53,2 12,2M14.59, 8L12,10.59L9.41,8L8,9.41L10.59,12L8,14.59L9.41,16L12,13.41L14.59,16L16,14.59L13.41,12L16,9.41L14.59,8Z" />
 </vector>
diff --git a/app/src/main/res/drawable/ic_all_divider.xml b/app/src/main/res/drawable/ic_all_divider.xml
index f46b3ad71..61e964979 100644
--- a/app/src/main/res/drawable/ic_all_divider.xml
+++ b/app/src/main/res/drawable/ic_all_divider.xml
@@ -5,5 +5,5 @@
         android:angle="270"
         android:centerColor="@android:color/transparent"
         android:centerX="0.01"
-        android:startColor="#60606060" />
+        android:startColor="@color/colorDivider" />
 </shape>
diff --git a/app/src/main/res/drawable/ic_all_note_24dp.xml b/app/src/main/res/drawable/ic_all_mark.xml
similarity index 63%
rename from app/src/main/res/drawable/ic_all_note_24dp.xml
rename to app/src/main/res/drawable/ic_all_mark.xml
index 988df22c0..127216490 100644
--- a/app/src/main/res/drawable/ic_all_note_24dp.xml
+++ b/app/src/main/res/drawable/ic_all_mark.xml
@@ -1,10 +1,9 @@
-
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
-    android:viewportHeight="24"
-    android:viewportWidth="24">
+    android:viewportWidth="24"
+    android:viewportHeight="24">
     <path
-        android:fillColor="@color/colorPrimary"
+        android:fillColor="#FFF"
         android:pathData="M11 5h2v11h-2V5m2 13v2h-2v-2h2z" />
 </vector>
diff --git a/app/src/main/res/drawable/ic_all_round_note_24dp.xml b/app/src/main/res/drawable/ic_all_round_mark.xml
similarity index 51%
rename from app/src/main/res/drawable/ic_all_round_note_24dp.xml
rename to app/src/main/res/drawable/ic_all_round_mark.xml
index f4f1f2c52..91afb2334 100644
--- a/app/src/main/res/drawable/ic_all_round_note_24dp.xml
+++ b/app/src/main/res/drawable/ic_all_round_mark.xml
@@ -1,10 +1,9 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
-    android:viewportHeight="24"
-    android:viewportWidth="24">
+    android:viewportWidth="24"
+    android:viewportHeight="24">
     <path
-        android:fillColor="@color/colorPrimary"
-        android:pathData="M13 13h-2V7h2m0 10h-2v-2h2M12 2A10 10 0 0 0 2 12a10 10 0 0 0 10 10 10 10
-            0 0 0 10-10A10 10 0 0 0 12 2z" />
+        android:fillColor="#FFF"
+        android:pathData="M13 13h-2V7h2m0 10h-2v-2h2M12 2A10 10 0 0 0 2 12a10 10 0 0 0 10 10 10 10 0 0 0 10-10A10 10 0 0 0 12 2z" />
 </vector>
diff --git a/app/src/main/res/drawable/ic_chevron_left.xml b/app/src/main/res/drawable/ic_chevron_left.xml
new file mode 100644
index 000000000..ee3ff4be8
--- /dev/null
+++ b/app/src/main/res/drawable/ic_chevron_left.xml
@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M15.41,7.41L14,6l-6,6 6,6 1.41,-1.41L10.83,12z"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_chevron_right.xml b/app/src/main/res/drawable/ic_chevron_right.xml
new file mode 100644
index 000000000..a6d734973
--- /dev/null
+++ b/app/src/main/res/drawable/ic_chevron_right.xml
@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M10,6L8.59,7.41 13.17,12l-4.58,4.59L10,18l6,-6z"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_error.xml b/app/src/main/res/drawable/ic_error.xml
new file mode 100644
index 000000000..bb4cb3025
--- /dev/null
+++ b/app/src/main/res/drawable/ic_error.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FFF"
+      android:pathData="M11,15h2v2h-2zM11,7h2v6h-2zM11.99,2C6.47,2 2,6.48 2,12s4.47,10 9.99,10C17.52,22 22,17.52 22,12S17.52,2 11.99,2zM12,20c-4.42,0 -8,-3.58 -8,-8s3.58,-8 8,-8 8,3.58 8,8 -3.58,8 -8,8z"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_launcher_foreground.xml b/app/src/main/res/drawable/ic_launcher_foreground.xml
index cfec6390b..ee11f89d1 100644
--- a/app/src/main/res/drawable/ic_launcher_foreground.xml
+++ b/app/src/main/res/drawable/ic_launcher_foreground.xml
@@ -1,27 +1,15 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="108dp"
-        android:height="108dp"
-        android:viewportWidth="1926.9231"
-        android:viewportHeight="1926.9231">
-    <group android:translateX="462.46155"
-            android:translateY="462.46155">
-      <path
-          android:pathData="M-1001,-1002h3006v3006h-3006z"
-          android:fillColor="#D32F2F"/>
-      <path
-          android:pathData="M2003,1441.1V2003h-759.9l-1002,-1002h0l-120,-120c0.2,-0.2 -0.7,-1.6 -0.6,-1.8c1.6,-3.1 3.4,-6 5,-9.1c0.4,-0.8 0.6,-1.6 0.6,-2.5c9.2,-15.1 20.2,-28.9 31.4,-42.6c0.1,-0.2 0.3,-0.3 0.4,-0.5c5.1,-6.3 10.3,-12.6 15.3,-18.9c1,-1.2 1.9,-2.4 2.9,-3.7c0.2,-0.2 0.3,-0.4 0.5,-0.6c7.6,-9.7 14.8,-19.7 21.2,-30.2c1,-1.7 2,-3.4 2.9,-5.1c0.1,-0.2 0.2,-0.3 0.3,-0.5c6.2,-11.4 11.3,-23.3 17.7,-34.6c4.5,-8 9.3,-15.9 13.8,-23.9c0.1,-0.2 0.2,-0.3 0.3,-0.5c0.8,-1.5 1.6,-3 2.4,-4.4c0.2,-0.3 0.3,-0.6 0.5,-0.9c2,-3.7 3.8,-7.4 5.6,-11.2c6.2,-13.4 10.2,-27.7 14,-41.9c0,-0.2 0.1,-0.3 0.1,-0.5c0.3,-1 0.5,-2 0.8,-2.9c4,-15.3 7.3,-31.4 13.5,-45.9c1.4,-3.3 3,-6.5 4.6,-9.6c0.1,-0.2 0.2,-0.3 0.3,-0.5c5,-9.7 10.6,-19.1 13.5,-29.7c2.6,-9.2 3.5,-19 3.6,-28.8c0,-0.2 0,-0.3 0,-0.5c0.1,-7.2 -0.1,-14.4 -0.4,-21.3c0.9,-5.6 1.9,-11.3 3,-16.9c0.2,-0.9 0.3,-1.7 0.5,-2.6c1.2,-5.9 2.5,-11.7 4.2,-17.4c0,-0.1 0.1,-0.3 0.1,-0.4c0,-0.2 0.1,-0.3 0.1,-0.5c0.2,-2.1 -0.8,-3.7 -2.4,-4.5l7.7,-7.6c1.2,0.9 2.7,1.3 4.3,0.9c12.8,-3.9 24.9,-9.9 36.3,-16.8c2.8,-1.7 5.6,-3.4 8.3,-5.2c0.2,-0.1 0.3,-0.2 0.5,-0.3c7.7,-4.9 15.2,-10.2 22.1,-16c3.1,-2.7 5.9,-5.6 8.3,-8.9c0.1,-0.2 0.2,-0.3 0.4,-0.5c2.3,-3.4 4.2,-7.2 5.3,-11.4c2.4,-9.2 1.9,-19 1.9,-28.4c0,-0.2 0,-0.4 0,-0.6l5.7,-5.6l-0.3,0.1l4.1,1.3l45.3,45l9.6,9.6l14.3,14.3l100.8,100.8l17.2,17.2l16.3,16.3l30.3,-30.3L442.3,348.5c0.5,-0.5 1.1,-1.6 1.4,-2.3c0.3,-0.6 0.5,-1.2 0.4,-1.9c0,-0.8 -0.2,-1.6 -0.6,-2.3c-0.1,-0.3 -0.3,-0.7 -0.4,-1c-0.2,-0.4 -0.5,-0.7 -0.9,-1.1l27.8,-27.8l191.1,-191.1c0.7,0.4 1.5,0.6 2.5,0.7c4.1,0 8.2,0.1 11.9,1.9c0.5,0.3 1.3,0.7 2.1,1.1c1.7,2.3 3.5,4.5 5.7,6.2c2.7,2.1 8.2,3 9.4,0.3L2003,1441.1z"
-          android:fillColor="#AD2A2A"/>
-      <path
-          android:pathData="M619.3,797.7c0.4,1.2 0.5,2.4 0.5,3.7l-5.8,73.3c-0.4,5.2 -5,9.3 -10.6,9.3H416.2c-4,0 -7.7,-2.3 -9.5,-5.6L375.8,821c-0.2,-0.3 -0.3,-0.6 -0.4,-0.9l-29.1,-70.5c-1.1,-2.5 -0.9,-5.4 0.3,-7.8l48.3,-94.5c1.2,-2.3 1.4,-5 0.5,-7.4l-23.6,-65.4c-0.8,-2.3 -0.7,-4.9 0.3,-7.1l39.4,-83.9c4,-8.4 17.1,-7.7 19.9,1.1l12.3,38.2l37.5,100.4c1,2.8 3.4,5 6.4,6l80,27.3c3.1,1.1 5.5,3.4 6.5,6.3L619.3,797.7z"
-          android:fillColor="#FFFFFF"/>
-      <path
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-          android:fillColor="#FFFFFF"/>
-    </group>
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="1926"
+    android:viewportHeight="1926">
+    <path
+        android:fillColor="#ad2a2a"
+        android:pathData="M2465,1904v561h-759L704,1463l-120,-120 -1,-1 5,-9 1,-3c9,-15 20,-29 31,-43l16,-19 3,-4 21,-30 3,-6c7,-11 12,-23 18,-35l14,-24 3,-4v-1a234,234 0,0 0,20 -53v-1l1,-3c4,-15 7,-31 13,-46l5,-9v-1c5,-10 11,-19 14, -30 2,-9 3,-19 3,-28v-1,-21l3,-17v-3l4,-17h1v-1c0,-2 -1,-4 -3,-4l8,-8 4,1c13,-4 25,-10 37,-17l8,-5 22,-16 9,-9v-1l5, -11c3,-9 2,-19 2,-29l6,-6 4,2 45,45 10,9 14,14 101,101 17,17 16,17 31,-31 -193,-191 1,-2 1,-2 -1,-3v-1l-1,-1 27,-27 192,-192 2,1a27,27 0,0 1,14 3l6,6c2,2 8,3 9,1l1310,1310z" />
+    <path
+        android:fillColor="#fff"
+        android:pathData="M1082,1260v4l-6,73c0,5 -5,9 -10,9H879c-4,0 -8,-2 -10,-5l-31,-58 -29,-71v-8l48,-94c2,-3 2,-5 1, -8l-24,-65c-1,-2 0,-5 1,-7l39,-84c4,-8 17,-8 20,1l12,38 38,101c1,2 3,5 6,6l80,27c3,1 6,3 7,6l45,135zM852,717c0,-23 15,-43 35,-52l-2,-8c0,-11 13,-20 29,-20h1a38,38 0,0 1,36 -18l3,-2c11,-16 37,-27 68,-27 12,0 23,2 32,4 3,-3 8,-6 14,-6s12,3 14,8c8,-9 22,-16 38,-16 25,0 45,16 45,36l-1,7 3,4c16,6 27,17 27,30 0,14 -15,27 -34,32 -2,0 -3,1 -3,3 0,11 -11,21 -26,22v1c0,22 -41,40 -92,40 -11,0 -21,-1 -31,-3v1c0,9 -12,16 -26,16h-2l2,7c0,14 -18,25 -40,25h-7l-4, 2c-2,7 -8,12 -15,12 -9,0 -16,-7 -16,-16 0,-5 1,-8 4,-11l1,-4c-2,-3 -2,-5 -2,-8 0,-2 -2,-3 -3,-3 -27,-6 -48,-29 -48,-56z" />
+    <path
+        android:fillColor="#fff"
+        android:pathData="M1336,1346h-125c-3,0 -6,-1 -8,-4l-84,-118 -1,-2 -42,-122 -5,-5 -102,-52 -5,-6 -15,-75 -2,-3 -34,-51c-2,-3 -2,-6 -1,-9l21,-45c2,-4 5,-6 9,-6l39,-2c3,0 5,-1 6,-3l29,-22c5,-4 14,-2 17,4l98,201 1,2 13,81 2,5 197,216c6,6 1,16 -8,16zM801,1302c1,3 1,6 -1,8l-19,31c-2,3 -5,5 -9,5H591c-8,0 -13,-8 -9,-15l116,-171 2,-3 53, -228c1,-3 3,-5 5,-6l72,-40c3,-1 5,-4 5,-7l10,-42c2,-9 15,-11 20,-3l3,6c2,2 2,5 1,8l-66,190v5l16,91v5l-40,88v6l22,72z" />
 </vector>
diff --git a/app/src/main/res/drawable/ic_login_outlined_border.xml b/app/src/main/res/drawable/ic_login_outlined_border.xml
deleted file mode 100644
index 359bea5e4..000000000
--- a/app/src/main/res/drawable/ic_login_outlined_border.xml
+++ /dev/null
@@ -1,12 +0,0 @@
-<shape xmlns:android="http://schemas.android.com/apk/res/android">
-    <solid android:color="@null" />
-    <stroke
-        android:width="1dip"
-        android:color="#61000000" />
-    <corners android:radius="4dip" />
-    <padding
-        android:bottom="0dip"
-        android:left="0dip"
-        android:right="0dip"
-        android:top="0dip" />
-</shape>
diff --git a/app/src/main/res/drawable/ic_main_attendance.xml b/app/src/main/res/drawable/ic_main_attendance.xml
new file mode 100644
index 000000000..c42a17b3d
--- /dev/null
+++ b/app/src/main/res/drawable/ic_main_attendance.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M4,2C2.8954,2 2,2.8954 2,4v14c0,1.1046 0.8954,2 2,2h6l2,-2v-4h4l2,-2L12,12L12,8h6v4l2,-2L20,4C20,2.8954 19.1046,2 18,2ZM4,4L18,4L18,6L4,6ZM4,8h6v4L4,12ZM20,13 L19,14 21,16 22,15zM4,14h6v4L4,18ZM18,15 L12,21v2h2l6,-6z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_main_exam.xml b/app/src/main/res/drawable/ic_main_exam.xml
new file mode 100644
index 000000000..a705c0a4b
--- /dev/null
+++ b/app/src/main/res/drawable/ic_main_exam.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M19,3L18,3L18,1L16,1L16,3L8,3L8,1L6,1L6,3L5,3C3.89,3 3.01,3.9 3.01,5L3,19c0,1.1 0.89,2 2,2h14c1.1,0 2,-0.9 2,-2L21,5C21,3.9 20.1,3 19,3ZM19,19L5,19L5,9L19,9ZM19,7L5,7L5,5h14zM12,12h5v5h-5z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_main_grade.xml b/app/src/main/res/drawable/ic_main_grade.xml
new file mode 100644
index 000000000..7577f399e
--- /dev/null
+++ b/app/src/main/res/drawable/ic_main_grade.xml
@@ -0,0 +1,7 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path android:fillColor="#FFF" android:pathData="M13,11H15V13H13M13,15H15A2,2 0 0,0 17,13V11C17,9.89 16.1,9 15,9H13V7H17V5H13A2,2 0 0,0 11,7V13C11,14.11 11.9,15 13,15M21,17H7V3H21M21,1H7A2,2 0 0,0 5,3V17A2,2 0 0,0 7,19H21A2,2 0 0,0 23,17V3A2,2 0 0,0 21,1M3,5H1V21A2,2 0 0,0 3,23H19V21H3V5Z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_main_more.xml b/app/src/main/res/drawable/ic_main_more.xml
new file mode 100644
index 000000000..1b436a327
--- /dev/null
+++ b/app/src/main/res/drawable/ic_main_more.xml
@@ -0,0 +1,7 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path android:fillColor="#FFF" android:pathData="M4,5H20V7H4V5M4,9H20V11H4V9M4,13H20V15H4V13M4,17H14V19H4V17Z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_main_timetable.xml b/app/src/main/res/drawable/ic_main_timetable.xml
new file mode 100644
index 000000000..b8f5cb855
--- /dev/null
+++ b/app/src/main/res/drawable/ic_main_timetable.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M19,3h-1L18,1h-2v2L8,3L8,1L6,1v2L5,3c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h14c1.1,0 2,-0.9 2,-2L21,5c0,-1.1 -0.9,-2 -2,-2zM19,19L5,19L5,9h14v10zM5,7L5,5h14v2L5,7zM7,11h10v2L7,13zM7,15h7v2L7,17z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_menu_attendance_summary.xml b/app/src/main/res/drawable/ic_menu_attendance_summary.xml
new file mode 100644
index 000000000..f0dab549d
--- /dev/null
+++ b/app/src/main/res/drawable/ic_menu_attendance_summary.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M19,3L5,3c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h14c1.1,0 2,-0.9 2,-2L21,5c0,-1.1 -0.9,-2 -2,-2zM19,19L5,19L5,5h14v14zM7,10h2v7L7,17zM11,7h2v10h-2zM15,13h2v4h-2z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_menu_grade_semester.xml b/app/src/main/res/drawable/ic_menu_grade_semester.xml
new file mode 100644
index 000000000..8eb86922a
--- /dev/null
+++ b/app/src/main/res/drawable/ic_menu_grade_semester.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M8,1L8,3L7,3C5.8954,3 5,3.8954 5,5v12c0,1.1 0.89,2 2,2h14c1.1046,0 2,-0.8954 2,-2L23,5C23,3.8954 22.1046,3 21,3L20,3L20,1L18,1L18,3L10,3L10,1ZM7,5L21,5L21,6.9414L7,6.9414ZM7,9h14v8L7,17ZM1,9v12c0,1.1 0.89,2 2,2L17,23L17,21L3,21L3,9ZM15,11v4h4v-4z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_menu_grade_semester_24dp.xml b/app/src/main/res/drawable/ic_menu_grade_semester_24dp.xml
deleted file mode 100644
index 2a03f6300..000000000
--- a/app/src/main/res/drawable/ic_menu_grade_semester_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24.0"
-    android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M21,17V8H7V17H21M21,3A2,2 0,0 1,23 5V17A2,2 0,0 1,21 19H7C5.89,19 5,18.1 5,17V5A2,2 0,0 1,7 3H8V1H10V3H18V1H20V3H21M3,21H17V23H3C1.89,23 1,22.1 1,21V9H3V21M19,15H15V11H19V15Z" />
-</vector>
diff --git a/app/src/main/res/drawable/ic_menu_main_attendance_24dp.xml b/app/src/main/res/drawable/ic_menu_main_attendance_24dp.xml
deleted file mode 100644
index eccc338fc..000000000
--- a/app/src/main/res/drawable/ic_menu_main_attendance_24dp.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<!-- drawable/table_edit.xml -->
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportHeight="24"
-    android:viewportWidth="24">
-    <path
-        android:fillColor="#000"
-        android:pathData="M22 13l-1 1-2-2 1-1 2 2m-10 6l6-6 2 2-6 6h-2v-2M4 2h14a2 2 0 0 1 2 2v4l-4 4h-4v4l-2
-            2H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2m0 4v4h6V6H4m8 0v4h6V6h-6m-8 6v4h6v-4H4z" />
-</vector>
diff --git a/app/src/main/res/drawable/ic_menu_main_attendance_summary_24dp.xml b/app/src/main/res/drawable/ic_menu_main_attendance_summary_24dp.xml
deleted file mode 100644
index 13cfc8fad..000000000
--- a/app/src/main/res/drawable/ic_menu_main_attendance_summary_24dp.xml
+++ /dev/null
@@ -1,5 +0,0 @@
-<vector android:height="24dp" android:tint="#FFFFFF"
-    android:viewportHeight="24.0" android:viewportWidth="24.0"
-    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
-    <path android:fillColor="#FF000000" android:pathData="M19,3L5,3c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h14c1.1,0 2,-0.9 2,-2L21,5c0,-1.1 -0.9,-2 -2,-2zM9,17L7,17v-7h2v7zM13,17h-2L11,7h2v10zM17,17h-2v-4h2v4z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_menu_main_exam_24dp.xml b/app/src/main/res/drawable/ic_menu_main_exam_24dp.xml
deleted file mode 100644
index 13179b7c3..000000000
--- a/app/src/main/res/drawable/ic_menu_main_exam_24dp.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportHeight="24"
-    android:viewportWidth="24">
-    <path
-        android:fillColor="#000"
-        android:pathData="M17,12h-5v5h5v-5zM16,1v2L8,3L8,1L6,1v2L5,3a2,2 0,0 0,-2 2v14c0,1.1 0.9,2
-            2,2h14a2,2 0,0 0,2 -2L21,5a2,2 0,0 0,-2 -2h-1L18,1h-2zM19,19L5,19L5,8h14v11z" />
-</vector>
diff --git a/app/src/main/res/drawable/ic_menu_main_grade_26dp.xml b/app/src/main/res/drawable/ic_menu_main_grade_26dp.xml
deleted file mode 100644
index 3866cd3c7..000000000
--- a/app/src/main/res/drawable/ic_menu_main_grade_26dp.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="26dp"
-    android:height="26dp"
-    android:viewportHeight="26"
-    android:viewportWidth="26">
-    <path
-        android:fillColor="#000"
-        android:pathData="M13 11h2v2h-2m0 2h2a2 2 0 0 0 2-2v-2a2 2 0 0 0-2-2h-2V7h4V5h-4a2 2 0 0 0-2
-            2v6c0 1.1 0.9 2 2 2m8 2H7V3h14m0-2H7a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2V3a2
-            2 0 0 0-2-2M3 5H1v16a2 2 0 0 0 2 2h16v-2H3V5z" />
-</vector>
diff --git a/app/src/main/res/drawable/ic_menu_main_homework_24dp.xml b/app/src/main/res/drawable/ic_menu_main_homework_24dp.xml
deleted file mode 100644
index 449f0e28a..000000000
--- a/app/src/main/res/drawable/ic_menu_main_homework_24dp.xml
+++ /dev/null
@@ -1,12 +0,0 @@
-<!--https://materialdesignicons.com/icon/notebook-->
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24"
-    android:viewportHeight="24">
-    <path
-        android:fillColor="#000"
-        android:pathData="M3,7V5H5V4C5,2.89 5.9,2 7,2H13V9L15.5,7.5L18,9V2H19C20.05,2 21,2.95
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-            11H5V13H7V11M7,7V5H5V7H7M7,19V17H5V19H7Z" />
-</vector>
diff --git a/app/src/main/res/drawable/ic_menu_main_lessons_completed_24dp.xml b/app/src/main/res/drawable/ic_menu_main_lessons_completed_24dp.xml
deleted file mode 100644
index c0664c370..000000000
--- a/app/src/main/res/drawable/ic_menu_main_lessons_completed_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24"
-    android:viewportHeight="24">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M19,19H5V8H19M19,3H18V1H16V3H8V1H6V3H5C3.89,3 3,3.9 3,5V19A2,2 0,0 0,5 21H19A2,2 0,0 0,21 19V5A2,2 0,0 0,19 3M16.53,11.06L15.47,10L10.59,14.88L8.47,12.76L7.41,13.82L10.59,17L16.53,11.06Z" />
-</vector>
diff --git a/app/src/main/res/drawable/ic_menu_main_more_24dp.xml b/app/src/main/res/drawable/ic_menu_main_more_24dp.xml
deleted file mode 100644
index 26932b2b2..000000000
--- a/app/src/main/res/drawable/ic_menu_main_more_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="26dp"
-    android:height="26dp"
-    android:viewportWidth="24"
-    android:viewportHeight="24">
-    <path
-        android:fillColor="#FF000000"
-        android:pathData="M14,17L4,17v2h10v-2zM20,9L4,9v2h16L20,9zM4,15h16v-2L4,13v2zM4,5v2h16L20,5L4,5z" />
-</vector>
diff --git a/app/src/main/res/drawable/ic_menu_main_note_24dp.xml b/app/src/main/res/drawable/ic_menu_main_note_24dp.xml
deleted file mode 100644
index 6b3172baf..000000000
--- a/app/src/main/res/drawable/ic_menu_main_note_24dp.xml
+++ /dev/null
@@ -1,13 +0,0 @@
-<!--https://materialdesignicons.com/icon/trophy-->
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24"
-    android:viewportHeight="24">
-    <path
-        android:fillColor="#FF000000"
-        android:pathData="M20.2,2H19.5H18C17.1,2 16,3 16,4H8C8,3 6.9,2 6,2H4.5H3.8H2V11C2,12 3,13
-            4,13H6.2C6.6,15 7.9,16.7 11,17V19.1C8.8,19.3 8,20.4 8,21.7V22H16V21.7C16,20.4 15.2,19.3
-            13,19.1V17C16.1,16.7 17.4,15 17.8,13H20C21,13 22,12 22,11V2H20.2M4,11V4H6V6V11C5.1,11
-            4.3,11 4,11M20,11C19.7,11 18.9,11 18,11V6V4H20V11Z" />
-</vector>
diff --git a/app/src/main/res/drawable/ic_menu_main_timetable_24dp.xml b/app/src/main/res/drawable/ic_menu_main_timetable_24dp.xml
deleted file mode 100644
index 1594285f9..000000000
--- a/app/src/main/res/drawable/ic_menu_main_timetable_24dp.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24"
-    android:viewportHeight="24">
-    <path
-        android:fillColor="#000"
-        android:pathData="M14 14H7v2h7m5 3H5V8h14m0-5h-1V1h-2v2H8V1H6v2H5a2 2 0 0 0-2 2v14a2
-            2 0 0 0 2 2h14a2 2 0 0 0 2-2V5a2 2 0 0 0-2-2m-2 7H7v2h10v-2z" />
-</vector>
diff --git a/app/src/main/res/drawable/ic_more_messages_24dp.xml b/app/src/main/res/drawable/ic_menu_message_delete.xml
similarity index 50%
rename from app/src/main/res/drawable/ic_more_messages_24dp.xml
rename to app/src/main/res/drawable/ic_menu_message_delete.xml
index 65f32169d..e60947c89 100644
--- a/app/src/main/res/drawable/ic_more_messages_24dp.xml
+++ b/app/src/main/res/drawable/ic_menu_message_delete.xml
@@ -4,6 +4,6 @@
     android:viewportWidth="24.0"
     android:viewportHeight="24.0">
     <path
-        android:fillColor="#FF000000"
-        android:pathData="M20,4L4,4c-1.1,0 -1.99,0.9 -1.99,2L2,18c0,1.1 0.9,2 2,2h16c1.1,0 2,-0.9 2,-2L22,6c0,-1.1 -0.9,-2 -2,-2zM20,8l-8,5 -8,-5L4,6l8,5 8,-5v2z" />
+        android:fillColor="#FFF"
+        android:pathData="M16,9v10H8V9h8m-1.5,-6h-5l-1,1H5v2h14V4h-3.5l-1,-1zM18,7H6v12c0,1.1 0.9,2 2,2h8c1.1,0 2,-0.9 2,-2V7z" />
 </vector>
diff --git a/app/src/main/res/drawable/ic_menu_message_forward.xml b/app/src/main/res/drawable/ic_menu_message_forward.xml
new file mode 100644
index 000000000..97e34ddac
--- /dev/null
+++ b/app/src/main/res/drawable/ic_menu_message_forward.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M14,8.83L17.17,12 14,15.17V14H6v-4h8V8.83M12,4v4H4v8h8v4l8,-8 -8,-8z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_menu_message_reply.xml b/app/src/main/res/drawable/ic_menu_message_reply.xml
new file mode 100644
index 000000000..d9c667114
--- /dev/null
+++ b/app/src/main/res/drawable/ic_menu_message_reply.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M10,5L3,12L10,19L10,14.9004C15,14.9004 18.5,16.5 21,20C20,15 17,10 10,9L10,5zM8,9.8281L8,10.7344L9.7168,10.9805C12.4581,11.3721 14.2573,12.4578 15.6641,13.8516C13.929,13.2778 12.0718,12.9004 10,12.9004L8,12.9004L8,14.1719L5.8281,12L8,9.8281z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_menu_message_send.xml b/app/src/main/res/drawable/ic_menu_message_send.xml
new file mode 100644
index 000000000..fe72265f6
--- /dev/null
+++ b/app/src/main/res/drawable/ic_menu_message_send.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M4.01,6.03l7.51,3.22 -7.52,-1 0.01,-2.22m7.5,8.72L4,17.97v-2.22l7.51,-1M2.01,3L2,10l15,2 -15,2 0.01,7L23,12 2.01,3z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_menu_message_write.xml b/app/src/main/res/drawable/ic_menu_message_write.xml
new file mode 100644
index 000000000..7068aa5fe
--- /dev/null
+++ b/app/src/main/res/drawable/ic_menu_message_write.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M3,17.25V21h3.75L17.81,9.94l-3.75,-3.75L3,17.25zM5.92,19H5v-0.92l9.06,-9.06 0.92,0.92L5.92,19zM20.71,5.63l-2.34,-2.34c-0.2,-0.2 -0.45,-0.29 -0.71,-0.29s-0.51,0.1 -0.7,0.29l-1.83,1.83 3.75,3.75 1.83,-1.83c0.39,-0.39 0.39,-1.02 0,-1.41z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_menu_timetable_lessons_completed.xml b/app/src/main/res/drawable/ic_menu_timetable_lessons_completed.xml
new file mode 100644
index 000000000..a521adeea
--- /dev/null
+++ b/app/src/main/res/drawable/ic_menu_timetable_lessons_completed.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M19,3h-1L18,1h-2v2L8,3L8,1L6,1v2L5,3c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h14c1.1,0 2,-0.9 2,-2L21,5c0,-1.1 -0.9,-2 -2,-2zM19,19L5,19L5,9h14v10zM5,7L5,5h14v2L5,7zM10.56,17.46l5.93,-5.93 -1.06,-1.06 -4.87,4.87 -2.11,-2.11 -1.06,1.06z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_more_homework.xml b/app/src/main/res/drawable/ic_more_homework.xml
new file mode 100644
index 000000000..9641ff70f
--- /dev/null
+++ b/app/src/main/res/drawable/ic_more_homework.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M7,2C5.9,2 5,2.89 5,4L5,5L3,5v2h2v4L3,11v2h2v4L3,17v2h2v1c0,1.05 0.95,2 2,2h12c1.05,0 2,-0.95 2,-2L21,4C21,2.95 20.05,2 19,2ZM7,4h4v6.5996L14.5,8.5 18,10.5996L18,4h1L19,20L7,20L7,5ZM13,4h3L16,7.4004L14.5,6.5 13,7.4004Z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_more_lucky_number.xml b/app/src/main/res/drawable/ic_more_lucky_number.xml
new file mode 100644
index 000000000..d644288c0
--- /dev/null
+++ b/app/src/main/res/drawable/ic_more_lucky_number.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M9.6895,2C8.1895,2 7,3.25 7,4.75C7,6.64 8.7,8.1797 12,11.1797C15.3,8.1797 17,6.6395 17,4.6895C17,3.1895 15.75,2 14.25,2C13.39,2 12.57,2.36 12,3C11.43,2.36 10.6095,2 9.6895,2zM9.6895,4C10.0877,4 10.3217,4.1233 10.5059,4.3301L12,6.0078L13.4941,4.3301C13.6783,4.1233 13.9481,4 14.25,4C14.6922,4 15,4.3006 15,4.6895C15,5.0833 14.8867,5.4382 14.2012,6.2598C13.7754,6.7701 12.8089,7.6367 11.998,8.3965C11.187,7.6372 10.2202,6.77 9.793,6.2617C9.1048,5.4431 9,5.0954 9,4.75C9,4.3078 9.3006,4 9.6895,4zM4.6895,7C3.1895,7 2,8.25 2,9.75C2,10.61 2.36,11.43 3,12C2.36,12.57 2,13.3905 2,14.3105C2,15.8105 3.25,17 4.75,17C6.64,17 8.1797,15.3 11.1797,12C8.1797,8.7 6.6395,7 4.6895,7zM19.25,7C17.36,7 15.8201,8.7 12.8301,12C15.8201,15.3 17.3605,17 19.3105,17C20.8105,17 22,15.75 22,14.25C22,13.39 21.64,12.57 21,12C21.64,11.43 22,10.6095 22,9.6895C22,8.1895 20.75,7 19.25,7zM4.6895,9C5.0833,9 5.4382,9.1133 6.2598,9.7988C6.7701,10.2246 7.6367,11.1911 8.3965,12.002C7.6372,12.813 6.77,13.7798 6.2617,14.207C5.4431,14.8952 5.0954,15 4.75,15C4.3078,15 4,14.6994 4,14.3105C4,13.9123 4.1233,13.6783 4.3301,13.4941L6.0078,12L4.3301,10.5059C4.1233,10.3217 4,10.0519 4,9.75C4,9.3078 4.3006,9 4.6895,9zM19.25,9C19.6922,9 20,9.3006 20,9.6895C20,10.0877 19.8767,10.3217 19.6699,10.5059L17.9922,12L19.6699,13.4941C19.8767,13.6783 20,13.9481 20,14.25C20,14.6922 19.6994,15 19.3105,15C18.9167,15 18.562,14.888 17.7422,14.2031C17.2327,13.7775 16.3693,12.8091 15.6113,11.998C16.3686,11.187 17.2329,10.22 17.7402,9.793C18.5572,9.1054 18.9046,9 19.25,9zM12,12.8203C8.7,15.8203 7,17.3605 7,19.3105C7,20.8105 8.25,22 9.75,22C10.61,22 11.43,21.64 12,21C12.57,21.64 13.3905,22 14.3105,22C15.8105,22 17,20.75 17,19.25C17,17.36 15.3,15.8203 12,12.8203zM12.002,15.6035C12.813,16.3628 13.7798,17.23 14.207,17.7383C14.8952,18.5569 15,18.9046 15,19.25C15,19.6922 14.6994,20 14.3105,20C13.9123,20 13.6783,19.8767 13.4941,19.6699L12,17.9922L10.5059,19.6699C10.3217,19.8767 10.0519,20 9.75,20C9.3078,20 9,19.6994 9,19.3105C9,18.9167 9.1133,18.5618 9.7988,17.7402C10.2246,17.2299 11.1911,16.3633 12.002,15.6035z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_more_lucky_number_24dp.xml b/app/src/main/res/drawable/ic_more_lucky_number_24dp.xml
deleted file mode 100644
index f2e6152d8..000000000
--- a/app/src/main/res/drawable/ic_more_lucky_number_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24"
-    android:viewportHeight="24">
-  <path
-      android:fillColor="#FF000000"
-      android:pathData="M12,11.18C15.3,8.18 17,6.64 17,4.69C17,3.19 15.75,2 14.25,2C13.39,2 12.57,2.36 12,3C11.43,2.36 10.61,2 9.69,2C8.19,2 7,3.25 7,4.75C7,6.64 8.7,8.18 12,11.18M11.18,12C8.18,8.7 6.64,7 4.69,7C3.19,7 2,8.25 2,9.75C2,10.61 2.36,11.43 3,12C2.36,12.57 2,13.39 2,14.31C2,15.81 3.25,17 4.75,17C6.64,17 8.18,15.3 11.18,12M12.83,12C15.82,15.3 17.36,17 19.31,17C20.81,17 22,15.75 22,14.25C22,13.39 21.64,12.57 21,12C21.64,11.43 22,10.61 22,9.69C22,8.19 20.75,7 19.25,7C17.36,7 15.82,8.7 12.83,12M12,12.82C8.7,15.82 7,17.36 7,19.31C7,20.81 8.25,22 9.75,22C10.61,22 11.43,21.64 12,21C12.57,21.64 13.39,22 14.31,22C15.81,22 17,20.75 17,19.25C17,17.36 15.3,15.82 12,12.82Z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_more_messages.xml b/app/src/main/res/drawable/ic_more_messages.xml
new file mode 100644
index 000000000..20c54e01f
--- /dev/null
+++ b/app/src/main/res/drawable/ic_more_messages.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M22,6c0,-1.1 -0.9,-2 -2,-2L4,4c-1.1,0 -2,0.9 -2,2v12c0,1.1 0.9,2 2,2h16c1.1,0 2,-0.9 2,-2L22,6zM20,6l-8,5 -8,-5h16zM20,18L4,18L4,8l8,5 8,-5v10z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_more_mobile_devices.xml b/app/src/main/res/drawable/ic_more_mobile_devices.xml
new file mode 100644
index 000000000..6adeb6cff
--- /dev/null
+++ b/app/src/main/res/drawable/ic_more_mobile_devices.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M4,6h18L22,4L4,4c-1.1,0 -2,0.9 -2,2v11L0,17v3h14v-3L4,17L4,6zM23,8h-6c-0.55,0 -1,0.45 -1,1v10c0,0.55 0.45,1 1,1h6c0.55,0 1,-0.45 1,-1L24,9c0,-0.55 -0.45,-1 -1,-1zM22,17h-4v-7h4v7z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_more_note.xml b/app/src/main/res/drawable/ic_more_note.xml
new file mode 100644
index 000000000..47ba29cbe
--- /dev/null
+++ b/app/src/main/res/drawable/ic_more_note.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M2,2V11C2,12 3,13 4,13H6.2C6.6,15 7.9,16.7 11,17V19.1C8.8,19.3 8,20.4 8,21.7V22H16V21.7C16,20.4 15.2,19.3 13,19.1V17C16.1,16.7 17.4,15 17.8,13H20C21,13 22,12 22,11V2H18C17.1,2 16,3 16,4H8C8,3 6.9,2 6,2H2M4,4H6V6L6,11H4V4M18,4H20V11H18V6L18,4M8,6H16V11.5C16,13.43 15.42,15 12,15C8.59,15 8,13.43 8,11.5V6Z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_more_schoolandteachers.xml b/app/src/main/res/drawable/ic_more_schoolandteachers.xml
new file mode 100644
index 000000000..9cb9aee0e
--- /dev/null
+++ b/app/src/main/res/drawable/ic_more_schoolandteachers.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M18,15H16V17H18M18,11H16V13H18M20,19H12V17H14V15H12V13H14V11H12V9H20M10,7H8V5H10M10,11H8V9H10M10,15H8V13H10M10,19H8V17H10M6,7H4V5H6M6,11H4V9H6M6,15H4V13H6M6,19H4V17H6M12,7V3H2V21H22V7H12Z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_more_settings.xml b/app/src/main/res/drawable/ic_more_settings.xml
new file mode 100644
index 000000000..334eb11f7
--- /dev/null
+++ b/app/src/main/res/drawable/ic_more_settings.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFF"
+        android:pathData="M19.43,12.98c0.04,-0.32 0.07,-0.64 0.07,-0.98 0,-0.34 -0.03,-0.66 -0.07,-0.98l2.11,-1.65c0.19,-0.15 0.24,-0.42 0.12,-0.64l-2,-3.46c-0.09,-0.16 -0.26,-0.25 -0.44,-0.25 -0.06,0 -0.12,0.01 -0.17,0.03l-2.49,1c-0.52,-0.4 -1.08,-0.73 -1.69,-0.98l-0.38,-2.65C14.46,2.18 14.25,2 14,2h-4c-0.25,0 -0.46,0.18 -0.49,0.42l-0.38,2.65c-0.61,0.25 -1.17,0.59 -1.69,0.98l-2.49,-1c-0.06,-0.02 -0.12,-0.03 -0.18,-0.03 -0.17,0 -0.34,0.09 -0.43,0.25l-2,3.46c-0.13,0.22 -0.07,0.49 0.12,0.64l2.11,1.65c-0.04,0.32 -0.07,0.65 -0.07,0.98 0,0.33 0.03,0.66 0.07,0.98l-2.11,1.65c-0.19,0.15 -0.24,0.42 -0.12,0.64l2,3.46c0.09,0.16 0.26,0.25 0.44,0.25 0.06,0 0.12,-0.01 0.17,-0.03l2.49,-1c0.52,0.4 1.08,0.73 1.69,0.98l0.38,2.65c0.03,0.24 0.24,0.42 0.49,0.42h4c0.25,0 0.46,-0.18 0.49,-0.42l0.38,-2.65c0.61,-0.25 1.17,-0.59 1.69,-0.98l2.49,1c0.06,0.02 0.12,0.03 0.18,0.03 0.17,0 0.34,-0.09 0.43,-0.25l2,-3.46c0.12,-0.22 0.07,-0.49 -0.12,-0.64l-2.11,-1.65zM17.45,11.27c0.04,0.31 0.05,0.52 0.05,0.73 0,0.21 -0.02,0.43 -0.05,0.73l-0.14,1.13 0.89,0.7 1.08,0.84 -0.7,1.21 -1.27,-0.51 -1.04,-0.42 -0.9,0.68c-0.43,0.32 -0.84,0.56 -1.25,0.73l-1.06,0.43 -0.16,1.13 -0.2,1.35h-1.4l-0.19,-1.35 -0.16,-1.13 -1.06,-0.43c-0.43,-0.18 -0.83,-0.41 -1.23,-0.71l-0.91,-0.7 -1.06,0.43 -1.27,0.51 -0.7,-1.21 1.08,-0.84 0.89,-0.7 -0.14,-1.13c-0.03,-0.31 -0.05,-0.54 -0.05,-0.74s0.02,-0.43 0.05,-0.73l0.14,-1.13 -0.89,-0.7 -1.08,-0.84 0.7,-1.21 1.27,0.51 1.04,0.42 0.9,-0.68c0.43,-0.32 0.84,-0.56 1.25,-0.73l1.06,-0.43 0.16,-1.13 0.2,-1.35h1.39l0.19,1.35 0.16,1.13 1.06,0.43c0.43,0.18 0.83,0.41 1.23,0.71l0.91,0.7 1.06,-0.43 1.27,-0.51 0.7,1.21 -1.07,0.85 -0.89,0.7 0.14,1.13zM12,8c-2.21,0 -4,1.79 -4,4s1.79,4 4,4 4,-1.79 4,-4 -1.79,-4 -4,-4zM12,14c-1.1,0 -2,-0.9 -2,-2s0.9,-2 2,-2 2,0.9 2,2 -0.9,2 -2,2z" />
+</vector>
diff --git a/app/src/main/res/drawable/ic_more_settings_24dp.xml b/app/src/main/res/drawable/ic_more_settings_24dp.xml
deleted file mode 100644
index fc12cdcfe..000000000
--- a/app/src/main/res/drawable/ic_more_settings_24dp.xml
+++ /dev/null
@@ -1,17 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24.0"
-    android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FF000000"
-        android:pathData="M19.43,12.98c0.04,-0.32 0.07,-0.64 0.07,-0.98s-0.03,-0.66 -0.07,-0.98l2.11,-1.65c0.19,
-            -0.15 0.24,-0.42 0.12,-0.64l-2,-3.46c-0.12,-0.22 -0.39,-0.3 -0.61,-0.22l-2.49,1c-0.52,-0.4 -1.08,-0.73
-            -1.69,-0.98l-0.38,-2.65C14.46,2.18 14.25,2 14,2h-4c-0.25,0 -0.46,0.18 -0.49,0.42l-0.38,2.65c-0.61,0.25
-            -1.17,0.59 -1.69,0.98l-2.49,-1c-0.23,-0.09 -0.49,0 -0.61,0.22l-2,3.46c-0.13,0.22 -0.07,0.49 0.12,
-            0.64l2.11,1.65c-0.04,0.32 -0.07,0.65 -0.07,0.98s0.03,0.66 0.07,0.98l-2.11,1.65c-0.19,0.15 -0.24,0.42
-            -0.12,0.64l2,3.46c0.12,0.22 0.39,0.3 0.61,0.22l2.49,-1c0.52,0.4 1.08,0.73 1.69,0.98l0.38,2.65c0.03,0.24
-            0.24,0.42 0.49,0.42h4c0.25,0 0.46,-0.18 0.49,-0.42l0.38,-2.65c0.61,-0.25 1.17,-0.59 1.69,-0.98l2.49,1c0.23,
-            0.09 0.49,0 0.61,-0.22l2,-3.46c0.12,-0.22 0.07,-0.49 -0.12,-0.64l-2.11,-1.65zM12,15.5c-1.93,0 -3.5,-1.57
-            -3.5,-3.5s1.57,-3.5 3.5,-3.5 3.5,1.57 3.5,3.5 -1.57,3.5 -3.5,3.5z" />
-</vector>
diff --git a/app/src/main/res/drawable/ic_school_directions.xml b/app/src/main/res/drawable/ic_school_directions.xml
new file mode 100644
index 000000000..c48db1da0
--- /dev/null
+++ b/app/src/main/res/drawable/ic_school_directions.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FFF"
+      android:pathData="M22.43,10.59l-9.01,-9.01c-0.75,-0.75 -2.07,-0.76 -2.83,0l-9,9c-0.78,0.78 -0.78,2.04 0,2.82l9,9c0.39,0.39 0.9,0.58 1.41,0.58 0.51,0 1.02,-0.19 1.41,-0.58l8.99,-8.99c0.79,-0.76 0.8,-2.02 0.03,-2.82zM12.01,20.99l-9,-9 9,-9 9,9 -9,9zM8,11v4h2v-3h4v2.5l3.5,-3.5L14,7.5L14,10L9,10c-0.55,0 -1,0.45 -1,1z"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_school_phone.xml b/app/src/main/res/drawable/ic_school_phone.xml
new file mode 100644
index 000000000..7e3d7991e
--- /dev/null
+++ b/app/src/main/res/drawable/ic_school_phone.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FFF"
+      android:pathData="M6.54,5c0.06,0.89 0.21,1.76 0.45,2.59l-1.2,1.2c-0.41,-1.2 -0.67,-2.47 -0.76,-3.79h1.51m9.86,12.02c0.85,0.24 1.72,0.39 2.6,0.45v1.49c-1.32,-0.09 -2.59,-0.35 -3.8,-0.75l1.2,-1.19M7.5,3H4c-0.55,0 -1,0.45 -1,1 0,9.39 7.61,17 17,17 0.55,0 1,-0.45 1,-1v-3.49c0,-0.55 -0.45,-1 -1,-1 -1.24,0 -2.45,-0.2 -3.57,-0.57 -0.1,-0.04 -0.21,-0.05 -0.31,-0.05 -0.26,0 -0.51,0.1 -0.71,0.29l-2.2,2.2c-2.83,-1.45 -5.15,-3.76 -6.59,-6.59l2.2,-2.2c0.28,-0.28 0.36,-0.67 0.25,-1.02C8.7,6.45 8.5,5.25 8.5,4c0,-0.55 -0.45,-1 -1,-1z"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_send_message_24dp.xml b/app/src/main/res/drawable/ic_send_message_24dp.xml
deleted file mode 100644
index 0d82394be..000000000
--- a/app/src/main/res/drawable/ic_send_message_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24"
-    android:viewportHeight="24">
-    <path
-        android:fillColor="#FF000000"
-        android:pathData="M20.71,7.04C21.1,6.65 21.1,6 20.71,5.63L18.37,3.29C18,2.9 17.35,2.9 16.96,3.29L15.12,5.12L18.87,8.87M3,17.25V21H6.75L17.81,9.93L14.06,6.18L3,17.25Z" />
-</vector>
diff --git a/app/src/main/res/drawable/ic_timetable_swap_30dp.xml b/app/src/main/res/drawable/ic_timetable_swap.xml
similarity index 85%
rename from app/src/main/res/drawable/ic_timetable_swap_30dp.xml
rename to app/src/main/res/drawable/ic_timetable_swap.xml
index 01eee893c..4055623a7 100644
--- a/app/src/main/res/drawable/ic_timetable_swap_30dp.xml
+++ b/app/src/main/res/drawable/ic_timetable_swap.xml
@@ -4,6 +4,6 @@
     android:viewportHeight="24.0"
     android:viewportWidth="24.0">
     <path
-        android:fillColor="@color/colorPrimary"
+        android:fillColor="#FFF"
         android:pathData="M7 11l-4 4 4 4v-3h7v-2H7v-3zm14-2l-4-4v3h-7v2h7v3l4-4z" />
 </vector>
diff --git a/app/src/main/res/drawable/ic_widget_chevron_24dp.png b/app/src/main/res/drawable/ic_widget_chevron.png
similarity index 100%
rename from app/src/main/res/drawable/ic_widget_chevron_24dp.png
rename to app/src/main/res/drawable/ic_widget_chevron.png
diff --git a/app/src/main/res/drawable/ic_widget_clover.png b/app/src/main/res/drawable/ic_widget_clover.png
new file mode 100644
index 000000000..b1a7832a2
Binary files /dev/null and b/app/src/main/res/drawable/ic_widget_clover.png differ
diff --git a/app/src/main/res/drawable/img_luckynumber_widget_preview.png b/app/src/main/res/drawable/img_luckynumber_widget_preview.png
new file mode 100644
index 000000000..539b0a598
Binary files /dev/null and b/app/src/main/res/drawable/img_luckynumber_widget_preview.png differ
diff --git a/app/src/main/res/drawable/img_timetable_widget_preview.png b/app/src/main/res/drawable/img_timetable_widget_preview.png
index 60a35ab6a..550260258 100644
Binary files a/app/src/main/res/drawable/img_timetable_widget_preview.png and b/app/src/main/res/drawable/img_timetable_widget_preview.png differ
diff --git a/app/src/main/res/drawable/layer_splash_background.xml b/app/src/main/res/drawable/layer_splash_background.xml
index 64812f151..2cf46d1d0 100644
--- a/app/src/main/res/drawable/layer_splash_background.xml
+++ b/app/src/main/res/drawable/layer_splash_background.xml
@@ -1,7 +1,7 @@
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item>
         <shape>
-            <solid android:color="#9a0007" />
+            <solid android:color="@color/colorPrimaryDark" />
         </shape>
     </item>
     <item>
diff --git a/app/src/main/res/layout/activity_login.xml b/app/src/main/res/layout/activity_login.xml
index 1a86fa925..3841b25cd 100644
--- a/app/src/main/res/layout/activity_login.xml
+++ b/app/src/main/res/layout/activity_login.xml
@@ -1,10 +1,17 @@
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/loginContainer"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <com.google.android.material.appbar.MaterialToolbar
+        android:id="@+id/loginToolbar"
+        android:background="@android:color/transparent"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
 
     <com.aurelhubert.ahbottomnavigation.AHBottomNavigationViewPager
         android:id="@+id/loginViewpager"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
-</FrameLayout>
+</LinearLayout>
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 70c06ce8f..d07dbbd8a 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -1,29 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/mainContainer"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <com.google.android.material.appbar.AppBarLayout
-        android:id="@+id/mainAppBarContainer"
+    <com.google.android.material.appbar.MaterialToolbar
+        android:id="@+id/mainToolbar"
+        style="@style/Widget.MaterialComponents.Toolbar.Surface"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:theme="@style/WulkanowyTheme.ActionBar"
-        app:elevation="0dp">
+        android:layout_height="wrap_content" />
 
-        <androidx.appcompat.widget.Toolbar
-            android:id="@+id/mainToolbar"
-            android:layout_width="match_parent"
-            android:layout_height="?attr/actionBarSize" />
-    </com.google.android.material.appbar.AppBarLayout>
-
-    <FrameLayout
+    <androidx.fragment.app.FragmentContainerView
         android:id="@+id/mainFragmentContainer"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:layout_marginBottom="@dimen/bottom_navigation_height"
-        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
+        android:layout_marginTop="?actionBarSize"
+        android:layout_marginBottom="@dimen/bottom_navigation_height" />
 
     <com.aurelhubert.ahbottomnavigation.AHBottomNavigation
         android:id="@+id/mainBottomNav"
diff --git a/app/src/main/res/layout/activity_send_message.xml b/app/src/main/res/layout/activity_send_message.xml
index 00b0e77ce..f59dcabdf 100644
--- a/app/src/main/res/layout/activity_send_message.xml
+++ b/app/src/main/res/layout/activity_send_message.xml
@@ -1,161 +1,208 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
     android:id="@+id/sendMessageContainer"
+    android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">
 
-    <com.google.android.material.appbar.AppBarLayout
-        android:id="@+id/sendMessageAppBarContainer"
+    <com.google.android.material.appbar.MaterialToolbar
+        android:id="@+id/sendMessageToolbar"
+        style="@style/Widget.MaterialComponents.Toolbar.Surface"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:theme="@style/WulkanowyTheme.ActionBar"
-        app:elevation="0dp">
+        android:elevation="4dp"
+        app:layout_constraintBottom_toTopOf="@id/sendMessageScroll"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:targetApi="lollipop" />
 
-        <androidx.appcompat.widget.Toolbar
-            android:id="@+id/sendMessageToolbar"
+    <io.github.wulkanowy.materialchipsinput.ConsumedNestedScrollView
+        android:id="@+id/sendMessageScroll"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:fillViewport="true"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/sendMessageToolbar">
+
+        <FrameLayout
             android:layout_width="match_parent"
-            android:layout_height="?attr/actionBarSize" />
-    </com.google.android.material.appbar.AppBarLayout>
+            android:layout_height="match_parent">
+
+            <androidx.constraintlayout.widget.ConstraintLayout
+                android:id="@+id/sendMessageContent"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+
+                <TextView
+                    android:id="@+id/sendMessageFromHint"
+                    android:layout_width="wrap_content"
+                    android:layout_height="58dp"
+                    android:layout_marginStart="16dp"
+                    android:layout_marginLeft="16dp"
+                    android:gravity="center_vertical"
+                    android:text="@string/message_from"
+                    android:textColor="?android:textColorHint"
+                    android:textSize="18sp"
+                    app:layout_constraintEnd_toStartOf="@id/sendMessageFrom"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toTopOf="parent" />
+
+                <TextView
+                    android:id="@+id/sendMessageFrom"
+                    android:layout_width="0dp"
+                    android:layout_height="58dp"
+                    android:layout_marginStart="16dp"
+                    android:layout_marginLeft="16dp"
+                    android:layout_marginEnd="16dp"
+                    android:layout_marginRight="16dp"
+                    android:gravity="center_vertical"
+                    android:textSize="18sp"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toEndOf="@id/sendMessageFromHint"
+                    app:layout_constraintTop_toTopOf="parent"
+                    tools:text="Jan Kowalski" />
+
+                <View
+                    android:id="@+id/sendMessageFromDivider"
+                    android:layout_width="match_parent"
+                    android:layout_height="1dp"
+                    android:background="?colorDivider"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/sendMessageFrom" />
+
+                <TextView
+                    android:id="@+id/sendMessageToHint"
+                    android:layout_width="wrap_content"
+                    android:layout_height="58dp"
+                    android:layout_marginStart="16dp"
+                    android:layout_marginLeft="16dp"
+                    android:gravity="center_vertical"
+                    android:text="@string/message_to"
+                    android:textColor="?android:textColorHint"
+                    android:textSize="18sp"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/sendMessageFromDivider" />
+
+                <io.github.wulkanowy.materialchipsinput.MaterialChipInput
+                    android:id="@+id/sendMessageTo"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="16dp"
+                    android:layout_marginLeft="16dp"
+                    android:layout_marginEnd="16dp"
+                    android:layout_marginRight="16dp"
+                    android:paddingTop="13dp"
+                    android:paddingBottom="13dp"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toEndOf="@id/sendMessageToHint"
+                    app:layout_constraintTop_toBottomOf="@id/sendMessageFromDivider" />
+
+                <View
+                    android:id="@+id/sendMessageToDivider"
+                    android:layout_width="match_parent"
+                    android:layout_height="1dp"
+                    android:background="?colorDivider"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/sendMessageTo" />
+
+                <EditText
+                    android:id="@+id/sendMessageSubject"
+                    android:layout_width="match_parent"
+                    android:layout_height="58dp"
+                    android:layout_marginLeft="16dp"
+                    android:layout_marginRight="16dp"
+                    android:background="@android:color/transparent"
+                    android:gravity="center_vertical"
+                    android:hint="@string/message_subject"
+                    android:imeOptions="flagNoExtractUi"
+                    android:importantForAutofill="no"
+                    android:inputType="text"
+                    android:maxLines="1"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/sendMessageToDivider"
+                    tools:targetApi="o" />
+
+                <View
+                    android:id="@+id/sendMessageSubjectDivider"
+                    android:layout_width="match_parent"
+                    android:layout_height="1dp"
+                    android:background="?colorDivider"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/sendMessageSubject" />
+
+                <EditText
+                    android:id="@+id/sendMessageMessageContent"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:background="@android:color/transparent"
+                    android:gravity="start"
+                    android:hint="@string/message_content"
+                    android:imeOptions="flagNoExtractUi"
+                    android:importantForAutofill="no"
+                    android:inputType="textMultiLine"
+                    android:minHeight="58dp"
+                    android:paddingStart="16dp"
+                    android:paddingLeft="16dp"
+                    android:paddingTop="16dp"
+                    android:paddingEnd="16dp"
+                    android:paddingRight="16dp"
+                    app:layout_constraintBottom_toBottomOf="parent"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/sendMessageSubjectDivider"
+                    app:layout_constraintVertical_bias="0.0"
+                    tools:targetApi="o" />
+            </androidx.constraintlayout.widget.ConstraintLayout>
+        </FrameLayout>
+    </io.github.wulkanowy.materialchipsinput.ConsumedNestedScrollView>
 
     <LinearLayout
-        android:id="@+id/sendMessageContent"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:layout_below="@id/sendMessageAppBarContainer"
-        android:orientation="vertical">
+        android:id="@+id/sendMessageEmpty"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/sendMessageToolbar"
+        tools:ignore="UseCompoundDrawables">
 
-        <LinearLayout
-            android:layout_width="match_parent"
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            android:layout_gravity="center_horizontal"
+            app:srcCompat="@drawable/ic_more_messages"
+            app:tint="?colorOnBackground"
+            tools:ignore="ContentDescription" />
+
+        <TextView
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:padding="14dp">
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginEnd="10dp"
-                android:layout_marginRight="10dp"
-                android:text="@string/message_from"
-                android:textColor="@android:color/darker_gray"
-                android:textSize="18sp" />
-
-            <androidx.appcompat.widget.AppCompatEditText
-                android:id="@+id/sendMessageFromTextView"
-                android:layout_width="match_parent"
-                android:layout_height="30dp"
-                android:background="@android:color/transparent"
-                android:enabled="false"
-                android:textColor="?android:attr/textColorPrimaryNoDisable"
-                tools:text="Jan Kowalski" />
-        </LinearLayout>
-
-        <View
-            android:layout_width="match_parent"
-            android:layout_height="1dp"
-            android:background="?attr/dividerColor" />
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="58dp"
-            android:paddingStart="14dp"
-            android:paddingLeft="14dp"
-            tools:ignore="RtlSymmetry">
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_gravity="center"
-                android:layout_marginEnd="10dp"
-                android:layout_marginRight="10dp"
-                android:text="@string/message_to"
-                android:textAlignment="center"
-                android:textColor="@android:color/darker_gray"
-                android:textSize="18sp" />
-
-            <com.pchmn.materialchips.ChipsInput
-                android:id="@+id/sendMessageRecipientsInput"
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:layout_gravity="center"
-                android:background="@android:color/transparent"
-                app:horizontalScroll="true"
-                tools:layout_height="30dp">
-
-            </com.pchmn.materialchips.ChipsInput>
-        </LinearLayout>
-
-        <View
-            android:layout_width="match_parent"
-            android:layout_height="1dp"
-            android:background="?attr/dividerColor" />
-
-        <androidx.appcompat.widget.AppCompatEditText
-            android:id="@+id/sendMessageSubjectInput"
-            android:layout_width="match_parent"
-            android:layout_height="58dp"
-            android:background="@android:color/transparent"
-            android:hint="@string/message_subject"
-            android:inputType="text"
-            android:maxLines="1"
-            android:padding="14dp" />
-
-        <View
-            android:layout_width="match_parent"
-            android:layout_height="1dp"
-            android:background="?attr/dividerColor" />
-
-        <androidx.appcompat.widget.AppCompatEditText
-            android:id="@+id/sendMessageContentInput"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:background="@android:color/transparent"
-            android:gravity="top|start"
-            android:hint="@string/message_content"
-            android:inputType="textMultiLine"
-            android:paddingStart="14dp"
-            android:paddingLeft="14dp"
-            android:paddingTop="18dp"
-            android:paddingEnd="14dp"
-            android:paddingRight="14dp"
-            android:singleLine="false" />
+            android:layout_gravity="center_horizontal"
+            android:text="@string/error_unknown"
+            android:textSize="20sp"
+            tools:text="No messages" />
     </LinearLayout>
 
-    <FrameLayout
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:layout_below="@id/sendMessageAppBarContainer">
-
-        <LinearLayout
-            android:id="@+id/sendMessageEmpty"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_gravity="center"
-            android:orientation="vertical"
-            android:visibility="gone">
-
-            <androidx.appcompat.widget.AppCompatImageView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_gravity="center"
-                android:minWidth="100dp"
-                android:minHeight="100dp"
-                app:srcCompat="@drawable/ic_more_messages_24dp" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_gravity="center"
-                android:text="@string/error_unknown"
-                android:textSize="20sp" />
-        </LinearLayout>
-
-        <ProgressBar
-            android:id="@+id/sendMessageProgress"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_gravity="center"
-            android:visibility="gone" />
-    </FrameLayout>
-</RelativeLayout>
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
+        android:id="@+id/sendMessageProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:indeterminate="true"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/sendMessageToolbar" />
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/layout/activity_widget_configure.xml b/app/src/main/res/layout/activity_widget_configure.xml
new file mode 100644
index 000000000..548b86041
--- /dev/null
+++ b/app/src/main/res/layout/activity_widget_configure.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="280dp"
+    android:layout_height="wrap_content">
+
+    <TextView
+        android:id="@+id/widgetConfigureTitle"
+        android:layout_width="match_parent"
+        android:layout_height="64dp"
+        android:paddingStart="24dp"
+        android:paddingLeft="24dp"
+        android:paddingEnd="24dp"
+        android:paddingRight="24dp"
+        android:text="@string/account_title"
+        android:textSize="20sp"
+        android:textStyle="bold"
+        app:firstBaselineToTopHeight="40dp" />
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/widgetConfigureRecycler"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/widgetConfigureTitle"
+        android:layout_marginBottom="16dp"
+        android:overScrollMode="never"
+        tools:itemCount="3"
+        tools:listitem="@layout/item_account" />
+</RelativeLayout>
diff --git a/app/src/main/res/layout/dialog_account.xml b/app/src/main/res/layout/dialog_account.xml
index 9469aae12..f2ee0bca7 100644
--- a/app/src/main/res/layout/dialog_account.xml
+++ b/app/src/main/res/layout/dialog_account.xml
@@ -5,7 +5,7 @@
     android:layout_width="280dp"
     android:layout_height="wrap_content">
 
-    <androidx.appcompat.widget.AppCompatTextView
+    <TextView
         android:id="@+id/accountDialogTitle"
         android:layout_width="match_parent"
         android:layout_height="64dp"
@@ -27,24 +27,24 @@
         tools:itemCount="3"
         tools:listitem="@layout/item_account" />
 
-    <androidx.appcompat.widget.AppCompatButton
+    <com.google.android.material.button.MaterialButton
         android:id="@+id/accountDialogAdd"
-        style="@style/Widget.AppCompat.Button.Borderless"
+        style="@style/Widget.MaterialComponents.Button.TextButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_below="@id/accountDialogRecycler"
         android:layout_margin="8dp"
-        android:text="@string/account_add_new" />
+        android:text="@string/account_add_new"
+        android:textColor="?android:textColorPrimary" />
 
-    <androidx.appcompat.widget.AppCompatButton
+    <com.google.android.material.button.MaterialButton
         android:id="@+id/accountDialogRemove"
-        style="@style/Widget.AppCompat.Button.Borderless"
+        style="@style/Widget.MaterialComponents.Button.TextButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_below="@id/accountDialogRecycler"
         android:layout_alignParentEnd="true"
         android:layout_alignParentRight="true"
         android:layout_margin="8dp"
-        android:text="@string/account_logout"
-        android:textColor="@color/colorPrimary" />
+        android:text="@string/account_logout" />
 </RelativeLayout>
diff --git a/app/src/main/res/layout/dialog_attendance.xml b/app/src/main/res/layout/dialog_attendance.xml
index fe680d683..22268aac1 100644
--- a/app/src/main/res/layout/dialog_attendance.xml
+++ b/app/src/main/res/layout/dialog_attendance.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -80,15 +80,13 @@
             android:textIsSelectable="true"
             android:textSize="12sp" />
 
-        <Button
+        <com.google.android.material.button.MaterialButton
             android:id="@+id/attendanceDialogClose"
-            style="@style/Widget.AppCompat.Button.Borderless"
+            style="@style/Widget.MaterialComponents.Button.TextButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="end"
             android:layout_marginTop="15dp"
-            android:text="@string/all_close"
-            android:textAllCaps="true"
-            android:textSize="15sp" />
+            android:text="@string/all_close" />
     </LinearLayout>
-</ScrollView>
+</androidx.core.widget.NestedScrollView>
diff --git a/app/src/main/res/layout/dialog_error.xml b/app/src/main/res/layout/dialog_error.xml
index 904d04ebd..ec25f6a4f 100644
--- a/app/src/main/res/layout/dialog_error.xml
+++ b/app/src/main/res/layout/dialog_error.xml
@@ -11,11 +11,10 @@
         android:layout_weight="1"
         android:orientation="vertical">
 
-        <ScrollView
+        <androidx.core.widget.NestedScrollView
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:overScrollMode="ifContentScrolls"
-            tools:ignore="UselessParent">
+            android:overScrollMode="ifContentScrolls">
 
             <HorizontalScrollView
                 android:layout_width="350dp"
@@ -28,11 +27,12 @@
                     android:id="@+id/errorDialogContent"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:scrollHorizontally="true"
+                    android:gravity="start"
                     android:textIsSelectable="true"
-                    android:textSize="12sp" />
+                    android:textSize="12sp"
+                    tools:text="@tools:sample/lorem/random" />
             </HorizontalScrollView>
-        </ScrollView>
+        </androidx.core.widget.NestedScrollView>
     </LinearLayout>
 
     <LinearLayout
@@ -43,28 +43,24 @@
         android:minHeight="52dp"
         android:orientation="horizontal">
 
-        <Button
+        <com.google.android.material.button.MaterialButton
             android:id="@+id/errorDialogCancel"
-            style="@style/Widget.AppCompat.Button.Borderless"
+            style="@style/Widget.MaterialComponents.Button.TextButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center_vertical"
             android:layout_marginEnd="8dp"
             android:layout_marginRight="8dp"
-            android:gravity="center"
-            android:text="@android:string/cancel"
-            android:textColor="@color/colorPrimary" />
+            android:text="@android:string/cancel" />
 
-        <Button
+        <com.google.android.material.button.MaterialButton
             android:id="@+id/errorDialogCopy"
-            style="@style/Widget.AppCompat.Button.Borderless"
+            style="@style/Widget.MaterialComponents.Button.TextButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center_vertical"
             android:layout_marginEnd="8dp"
             android:layout_marginRight="8dp"
-            android:gravity="center"
-            android:text="@android:string/copy"
-            android:textColor="@color/colorPrimary" />
+            android:text="@android:string/copy" />
     </LinearLayout>
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/dialog_exam.xml b/app/src/main/res/layout/dialog_exam.xml
index 1f25195c7..8e46dc4f0 100644
--- a/app/src/main/res/layout/dialog_exam.xml
+++ b/app/src/main/res/layout/dialog_exam.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -101,16 +101,13 @@
             android:textIsSelectable="true"
             android:textSize="12sp" />
 
-        <Button
+        <com.google.android.material.button.MaterialButton
             android:id="@+id/examDialogClose"
-            style="@style/Widget.AppCompat.Button.Borderless"
+            style="@style/Widget.MaterialComponents.Button.TextButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="end"
             android:layout_marginTop="20dp"
-            android:text="@string/all_close"
-            android:textAllCaps="true"
-            android:textSize="15sp" />
-
+            android:text="@string/all_close" />
     </LinearLayout>
-</ScrollView>
+</androidx.core.widget.NestedScrollView>
diff --git a/app/src/main/res/layout/dialog_grade.xml b/app/src/main/res/layout/dialog_grade.xml
index 7a670878d..f95b9cfdb 100644
--- a/app/src/main/res/layout/dialog_grade.xml
+++ b/app/src/main/res/layout/dialog_grade.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -27,7 +27,7 @@
                 android:layout_gravity="end"
                 android:background="@color/grade_material_default"
                 android:gravity="center"
-                android:textColor="@color/grade_text"
+                android:textColor="@android:color/white"
                 android:textSize="30sp"
                 tools:text="6" />
 
@@ -188,8 +188,9 @@
                 android:textIsSelectable="true"
                 android:textSize="12sp" />
 
-            <Button
+            <com.google.android.material.button.MaterialButton
                 android:id="@+id/gradeDialogClose"
+                style="@style/Widget.MaterialComponents.Button.TextButton"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_alignTop="@+id/gradeDialogDateValue"
@@ -197,13 +198,7 @@
                 android:layout_alignParentRight="true"
                 android:layout_alignParentBottom="true"
                 android:layout_marginTop="25dp"
-                android:background="?attr/selectableItemBackground"
-                android:focusable="true"
-                android:text="@string/all_close"
-                android:textAllCaps="true"
-                android:textColor="?android:attr/android:textColorSecondary"
-                android:textSize="15sp" />
-
+                android:text="@string/all_close" />
         </RelativeLayout>
     </LinearLayout>
-</ScrollView>
+</androidx.core.widget.NestedScrollView>
diff --git a/app/src/main/res/layout/dialog_homework.xml b/app/src/main/res/layout/dialog_homework.xml
index fdfabc6f0..7ed9b795b 100644
--- a/app/src/main/res/layout/dialog_homework.xml
+++ b/app/src/main/res/layout/dialog_homework.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -97,15 +97,13 @@
             android:textIsSelectable="true"
             android:textSize="12sp" />
 
-        <Button
+        <com.google.android.material.button.MaterialButton
             android:id="@+id/homeworkDialogClose"
-            style="@style/Widget.AppCompat.Button.Borderless"
+            style="@style/Widget.MaterialComponents.Button.TextButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="end"
             android:layout_marginTop="15dp"
-            android:text="@string/all_close"
-            android:textAllCaps="true"
-            android:textSize="15sp" />
+            android:text="@string/all_close" />
     </LinearLayout>
-</ScrollView>
+</androidx.core.widget.NestedScrollView>
diff --git a/app/src/main/res/layout/dialog_lesson_completed.xml b/app/src/main/res/layout/dialog_lesson_completed.xml
index 161eb4c5b..31ca7dd3b 100644
--- a/app/src/main/res/layout/dialog_lesson_completed.xml
+++ b/app/src/main/res/layout/dialog_lesson_completed.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -17,12 +17,14 @@
             android:layout_marginTop="20dp"
             android:layout_marginBottom="20dp"
             android:text="@string/all_details"
+            android:textColor="?android:textColorPrimary"
             android:textSize="20sp" />
 
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="@string/timetable_lesson"
+            android:textColor="?android:textColorPrimary"
             android:textSize="17sp" />
 
         <TextView
@@ -31,6 +33,7 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="3dp"
             android:text="@string/all_no_data"
+            android:textColor="?android:textColorPrimary"
             android:textIsSelectable="true"
             android:textSize="12sp" />
 
@@ -39,6 +42,7 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="10dp"
             android:text="@string/completed_lessons_topic"
+            android:textColor="?android:textColorPrimary"
             android:textSize="17sp" />
 
         <TextView
@@ -47,6 +51,7 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="3dp"
             android:text="@string/all_no_data"
+            android:textColor="?android:textColorPrimary"
             android:textIsSelectable="true"
             android:textSize="12sp" />
 
@@ -56,6 +61,7 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="10dp"
             android:text="@string/all_teacher"
+            android:textColor="?android:textColorPrimary"
             android:textSize="17sp" />
 
         <TextView
@@ -64,6 +70,7 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="3dp"
             android:text="@string/all_no_data"
+            android:textColor="?android:textColorPrimary"
             android:textIsSelectable="true"
             android:textSize="12sp" />
 
@@ -73,7 +80,7 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="10dp"
             android:text="@string/timetable_changes"
-            android:textColor="@color/colorPrimary"
+            android:textColor="?colorTimetableChange"
             android:textSize="17sp" />
 
         <TextView
@@ -82,7 +89,7 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="3dp"
             android:text="@string/all_no_data"
-            android:textColor="@color/colorPrimary"
+            android:textColor="?colorTimetableChange"
             android:textIsSelectable="true"
             android:textSize="12sp" />
 
@@ -92,7 +99,7 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="10dp"
             android:text="@string/completed_lessons_absence"
-            android:textColor="@color/colorPrimary"
+            android:textColor="?colorPrimary"
             android:textSize="17sp" />
 
         <TextView
@@ -101,7 +108,7 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="3dp"
             android:text="@string/all_no_data"
-            android:textColor="@color/colorPrimary"
+            android:textColor="?colorPrimary"
             android:textIsSelectable="true"
             android:textSize="12sp" />
 
@@ -111,6 +118,7 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="10dp"
             android:text="@string/completed_lessons_resources"
+            android:textColor="?android:textColorPrimary"
             android:textSize="17sp" />
 
         <TextView
@@ -120,19 +128,18 @@
             android:layout_marginTop="3dp"
             android:autoLink="web"
             android:text="@string/all_no_data"
+            android:textColor="?android:textColorPrimary"
             android:textIsSelectable="true"
             android:textSize="12sp" />
 
-        <Button
+        <com.google.android.material.button.MaterialButton
             android:id="@+id/completedLessonDialogClose"
-            style="@style/Widget.AppCompat.Button.Borderless"
+            style="@style/Widget.MaterialComponents.Button.TextButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="end"
             android:layout_marginTop="15dp"
-            android:text="@string/all_close"
-            android:textAllCaps="true"
-            android:textSize="15sp" />
+            android:text="@string/all_close" />
 
     </LinearLayout>
-</ScrollView>
+</androidx.core.widget.NestedScrollView>
diff --git a/app/src/main/res/layout/dialog_mobile_device.xml b/app/src/main/res/layout/dialog_mobile_device.xml
new file mode 100644
index 000000000..7b1286053
--- /dev/null
+++ b/app/src/main/res/layout/dialog_mobile_device.xml
@@ -0,0 +1,98 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ui.modules.mobiledevice.token.MobileDeviceTokenDialog">
+
+    <FrameLayout
+        android:layout_width="300dp"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="20dp">
+
+        <LinearLayout
+            android:id="@+id/mobileDeviceDialogContent"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:visibility="invisible"
+            tools:visibility="visible">
+
+            <ImageView
+                android:id="@+id/mobileDeviceQr"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_marginBottom="12dp"
+                android:adjustViewBounds="true"
+                android:contentDescription="@string/mobile_device_qr"
+                tools:src="@tools:sample/avatars" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/mobile_device_token"
+                android:textSize="17sp" />
+
+            <TextView
+                android:id="@+id/mobileDeviceDialogToken"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="3dp"
+                android:text="@string/all_no_data"
+                android:textIsSelectable="true"
+                android:textSize="12sp" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="10dp"
+                android:text="@string/mobile_device_symbol"
+                android:textSize="17sp" />
+
+            <TextView
+                android:id="@+id/mobileDeviceDialogSymbol"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="3dp"
+                android:text="@string/all_no_data"
+                android:textIsSelectable="true"
+                android:textSize="12sp" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="10dp"
+                android:text="@string/mobile_device_pin"
+                android:textSize="17sp" />
+
+            <TextView
+                android:id="@+id/mobileDeviceDialogPin"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="3dp"
+                android:text="@string/all_no_data"
+                android:textIsSelectable="true"
+                android:textSize="12sp" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/mobileDeviceDialogClose"
+                style="@style/Widget.MaterialComponents.Button.TextButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="end"
+                android:layout_marginTop="15dp"
+                android:text="@string/all_close" />
+        </LinearLayout>
+
+        <me.zhanghai.android.materialprogressbar.MaterialProgressBar
+            android:id="@+id/mobileDeviceDialogProgress"
+            style="@style/Widget.MaterialProgressBar.ProgressBar"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:indeterminate="true"
+            tools:visibility="invisible" />
+    </FrameLayout>
+</androidx.core.widget.NestedScrollView>
diff --git a/app/src/main/res/layout/dialog_note.xml b/app/src/main/res/layout/dialog_note.xml
index e04683f85..0393e56af 100644
--- a/app/src/main/res/layout/dialog_note.xml
+++ b/app/src/main/res/layout/dialog_note.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -81,15 +81,13 @@
             android:textIsSelectable="true"
             android:textSize="12sp" />
 
-        <Button
+        <com.google.android.material.button.MaterialButton
             android:id="@+id/noteDialogClose"
-            style="@style/Widget.AppCompat.Button.Borderless"
+            style="@style/Widget.MaterialComponents.Button.TextButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="end"
             android:layout_marginTop="15dp"
-            android:text="@string/all_close"
-            android:textAllCaps="true"
-            android:textSize="15sp" />
+            android:text="@string/all_close" />
     </LinearLayout>
-</ScrollView>
+</androidx.core.widget.NestedScrollView>
diff --git a/app/src/main/res/layout/dialog_timetable.xml b/app/src/main/res/layout/dialog_timetable.xml
index 1cb650260..f3d4cf1ce 100644
--- a/app/src/main/res/layout/dialog_timetable.xml
+++ b/app/src/main/res/layout/dialog_timetable.xml
@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
-<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    xmlns:tools="http://schemas.android.com/tools">
 
     <LinearLayout
         android:layout_width="300dp"
@@ -22,7 +23,7 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="@string/timetable_changes"
-            android:textColor="@color/colorPrimary"
+            android:textColor="?colorTimetableChange"
             android:textSize="17sp" />
 
         <TextView
@@ -31,7 +32,7 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="3dp"
             android:text="@string/all_no_data"
-            android:textColor="@color/colorPrimary"
+            android:textColor="?colorTimetableChange"
             android:textIsSelectable="true"
             android:textSize="12sp" />
 
@@ -57,10 +58,11 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="3dp"
             android:text="@string/all_no_data"
-            android:textColor="@color/colorPrimary"
+            android:textColor="?colorTimetableChange"
             android:textIsSelectable="true"
             android:textSize="12sp"
-            android:visibility="gone" />
+            android:visibility="gone"
+            tools:visibility="visible" />
 
         <TextView
             android:id="@+id/timetableDialogTeacherTitle"
@@ -85,10 +87,11 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="3dp"
             android:text="@string/all_no_data"
-            android:textColor="@color/colorPrimary"
+            android:textColor="?colorTimetableChange"
             android:textIsSelectable="true"
             android:textSize="12sp"
-            android:visibility="gone" />
+            android:visibility="gone"
+            tools:visibility="visible" />
 
         <TextView
             android:id="@+id/timetableDialogGroupTitle"
@@ -130,10 +133,11 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="3dp"
             android:text="@string/all_no_data"
-            android:textColor="@color/colorPrimary"
+            android:textColor="?colorTimetableChange"
             android:textIsSelectable="true"
             android:textSize="12sp"
-            android:visibility="gone" />
+            android:visibility="gone"
+            tools:visibility="visible" />
 
         <TextView
             android:layout_width="wrap_content"
@@ -151,16 +155,13 @@
             android:textIsSelectable="true"
             android:textSize="12sp" />
 
-        <Button
+        <com.google.android.material.button.MaterialButton
             android:id="@+id/timetableDialogClose"
-            style="@style/Widget.AppCompat.Button.Borderless"
+            style="@style/Widget.MaterialComponents.Button.TextButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="end"
             android:layout_marginTop="15dp"
-            android:text="@string/all_close"
-            android:textAllCaps="true"
-            android:textSize="15sp" />
-
+            android:text="@string/all_close" />
     </LinearLayout>
-</ScrollView>
+</androidx.core.widget.NestedScrollView>
diff --git a/app/src/main/res/layout/fragment_about.xml b/app/src/main/res/layout/fragment_about.xml
new file mode 100644
index 000000000..556bdfd09
--- /dev/null
+++ b/app/src/main/res/layout/fragment_about.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/aboutRecycler"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+</FrameLayout>
diff --git a/app/src/main/res/layout/fragment_attendance.xml b/app/src/main/res/layout/fragment_attendance.xml
index 4627ffd13..daf7e67f9 100644
--- a/app/src/main/res/layout/fragment_attendance.xml
+++ b/app/src/main/res/layout/fragment_attendance.xml
@@ -2,15 +2,17 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    tools:context=".ui.modules.attendance.AttendanceFragment">
 
     <androidx.coordinatorlayout.widget.CoordinatorLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_marginBottom="50dp">
 
-        <ProgressBar
+        <me.zhanghai.android.materialprogressbar.MaterialProgressBar
             android:id="@+id/attendanceProgress"
+            style="@style/Widget.MaterialProgressBar.ProgressBar"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
@@ -24,7 +26,8 @@
             <androidx.recyclerview.widget.RecyclerView
                 android:id="@+id/attendanceRecycler"
                 android:layout_width="match_parent"
-                android:layout_height="match_parent" />
+                android:layout_height="match_parent"
+                tools:listitem="@layout/item_attendance" />
         </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
         <LinearLayout
@@ -34,15 +37,14 @@
             android:gravity="center"
             android:orientation="vertical"
             android:padding="10dp"
-            android:visibility="gone">
+            android:visibility="gone"
+            tools:ignore="UseCompoundDrawables">
 
-            <androidx.appcompat.widget.AppCompatImageView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:minWidth="100dp"
-                android:minHeight="100dp"
-                app:srcCompat="@drawable/ic_menu_main_attendance_24dp"
-                app:tint="?android:attr/textColorPrimary"
+            <ImageView
+                android:layout_width="100dp"
+                android:layout_height="100dp"
+                app:srcCompat="@drawable/ic_main_attendance"
+                app:tint="?colorOnBackground"
                 tools:ignore="contentDescription" />
 
             <TextView
@@ -53,44 +55,106 @@
                 android:text="@string/attendance_no_items"
                 android:textSize="20sp" />
         </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/attendanceError"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:visibility="invisible"
+            tools:ignore="UseCompoundDrawables"
+            tools:visibility="invisible">
+
+            <ImageView
+                android:layout_width="100dp"
+                android:layout_height="100dp"
+                app:srcCompat="@drawable/ic_error"
+                app:tint="?colorOnBackground"
+                tools:ignore="contentDescription" />
+
+            <TextView
+                android:id="@+id/attendanceErrorMessage"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="20dp"
+                android:gravity="center"
+                android:padding="8dp"
+                android:text="@string/error_unknown"
+                android:textSize="20sp" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="16dp"
+                android:gravity="center"
+                android:orientation="horizontal">
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/attendanceErrorDetails"
+                    style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="8dp"
+                    android:layout_marginRight="8dp"
+                    android:text="@string/all_details" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/attendanceErrorRetry"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/all_retry" />
+            </LinearLayout>
+        </LinearLayout>
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
 
-    <LinearLayout
+    <io.github.wulkanowy.ui.widgets.MaterialLinearLayout
+        android:id="@+id/attendanceNavContainer"
         android:layout_width="match_parent"
-        android:layout_height="50dp"
+        android:layout_height="48dp"
         android:layout_gravity="bottom"
-        android:background="?android:attr/windowBackground"
-        android:elevation="10dp"
-        android:orientation="horizontal">
+        android:gravity="center"
+        android:orientation="horizontal"
+        tools:ignore="UnusedAttribute">
 
-        <Button
+        <ImageButton
             android:id="@+id/attendancePreviousButton"
-            style="@style/Widget.AppCompat.Button.Borderless"
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:drawablePadding="4dp"
-            android:gravity="start|center"
-            android:text="@string/all_prev"
-            android:textAlignment="gravity" />
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/all_prev"
+            android:paddingLeft="12dp"
+            android:paddingTop="8dp"
+            android:paddingRight="12dp"
+            android:paddingBottom="8dp"
+            android:scaleType="fitStart"
+            android:tint="?colorPrimary"
+            app:srcCompat="@drawable/ic_chevron_left" />
 
         <TextView
             android:id="@+id/attendanceNavDate"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
+            android:background="?selectableItemBackgroundBorderless"
+            android:fontFamily="sans-serif"
             android:gravity="center"
-            android:text="@string/app_name" />
+            android:text="@string/app_name"
+            android:textSize="16sp" />
 
-        <Button
+        <ImageButton
             android:id="@+id/attendanceNextButton"
-            style="@style/Widget.AppCompat.Button.Borderless"
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_gravity="end"
             android:layout_weight="1"
-            android:drawablePadding="4dp"
-            android:gravity="end|center"
-            android:text="@string/all_next"
-            android:textAlignment="gravity" />
-    </LinearLayout>
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/all_next"
+            android:paddingLeft="12dp"
+            android:paddingTop="8dp"
+            android:paddingRight="12dp"
+            android:paddingBottom="8dp"
+            android:scaleType="fitEnd"
+            android:tint="?colorPrimary"
+            app:srcCompat="@drawable/ic_chevron_right" />
+    </io.github.wulkanowy.ui.widgets.MaterialLinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/fragment_attendance_summary.xml b/app/src/main/res/layout/fragment_attendance_summary.xml
index 5d03c2f4b..da0ce7f28 100644
--- a/app/src/main/res/layout/fragment_attendance_summary.xml
+++ b/app/src/main/res/layout/fragment_attendance_summary.xml
@@ -10,24 +10,23 @@
         android:layout_height="match_parent"
         android:orientation="vertical">
 
-        <LinearLayout
+        <io.github.wulkanowy.ui.widgets.MaterialLinearLayout
             android:id="@+id/attendanceSummarySubjectsContainer"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:background="?android:attr/windowBackground"
-            android:elevation="5dp"
+            android:background="?android:windowBackground"
             android:padding="5dp"
             android:visibility="invisible"
+            tools:ignore="UnusedAttribute"
             tools:listitem="@layout/item_attendance_summary"
-            tools:targetApi="lollipop"
             tools:visibility="visible">
 
-            <androidx.appcompat.widget.AppCompatSpinner
+            <Spinner
                 android:id="@+id/attendanceSummarySubjects"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:ellipsize="middle"
-                android:entries="@array/endpoints_keys"
+                android:entries="@array/hosts_keys"
                 android:paddingStart="10dp"
                 android:paddingLeft="10dp"
                 android:paddingTop="10dp"
@@ -35,7 +34,7 @@
                 android:paddingRight="30dp"
                 android:paddingBottom="10dp"
                 android:spinnerMode="dialog" />
-        </LinearLayout>
+        </io.github.wulkanowy.ui.widgets.MaterialLinearLayout>
 
         <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
             android:id="@+id/attendanceSummarySwipe"
@@ -50,12 +49,14 @@
         </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
     </LinearLayout>
 
-    <ProgressBar
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/attendanceSummaryProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:indeterminate="true" />
+        android:indeterminate="true"
+        tools:visibility="gone" />
 
     <LinearLayout
         android:id="@+id/attendanceSummaryEmpty"
@@ -63,15 +64,14 @@
         android:layout_height="match_parent"
         android:gravity="center"
         android:orientation="vertical"
-        android:visibility="invisible">
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables">
 
-        <androidx.appcompat.widget.AppCompatImageView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:minWidth="100dp"
-            android:minHeight="100dp"
-            app:srcCompat="@drawable/ic_menu_main_attendance_24dp"
-            app:tint="?android:attr/textColorPrimary"
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_main_attendance"
+            app:tint="?colorOnBackground"
             tools:ignore="contentDescription" />
 
         <TextView
@@ -82,4 +82,55 @@
             android:text="@string/attendance_no_items"
             android:textSize="20sp" />
     </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/attendanceSummaryError"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables"
+        tools:visibility="invisible">
+
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_error"
+            app:tint="?colorOnBackground"
+            tools:ignore="contentDescription" />
+
+        <TextView
+            android:id="@+id/attendanceSummaryErrorMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:padding="8dp"
+            android:text="@string/error_unknown"
+            android:textSize="20sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center"
+            android:orientation="horizontal">
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/attendanceSummaryErrorDetails"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:text="@string/all_details" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/attendanceSummaryErrorRetry"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/all_retry" />
+        </LinearLayout>
+    </LinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/fragment_exam.xml b/app/src/main/res/layout/fragment_exam.xml
index 5dbd2c79a..1e1b0c99e 100644
--- a/app/src/main/res/layout/fragment_exam.xml
+++ b/app/src/main/res/layout/fragment_exam.xml
@@ -2,15 +2,17 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    tools:context=".ui.modules.exam.ExamFragment">
 
     <androidx.coordinatorlayout.widget.CoordinatorLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_marginBottom="50dp">
 
-        <ProgressBar
+        <me.zhanghai.android.materialprogressbar.MaterialProgressBar
             android:id="@+id/examProgress"
+            style="@style/Widget.MaterialProgressBar.ProgressBar"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
@@ -24,7 +26,8 @@
             <androidx.recyclerview.widget.RecyclerView
                 android:id="@+id/examRecycler"
                 android:layout_width="match_parent"
-                android:layout_height="match_parent" />
+                android:layout_height="match_parent"
+                tools:listitem="@layout/header_exam" />
         </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
         <LinearLayout
@@ -34,15 +37,14 @@
             android:gravity="center"
             android:orientation="vertical"
             android:padding="10dp"
-            android:visibility="gone">
+            android:visibility="gone"
+            tools:ignore="UseCompoundDrawables">
 
-            <androidx.appcompat.widget.AppCompatImageView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:minWidth="100dp"
-                android:minHeight="100dp"
-                app:srcCompat="@drawable/ic_menu_main_exam_24dp"
-                app:tint="?android:attr/textColorPrimary"
+            <ImageView
+                android:layout_width="100dp"
+                android:layout_height="100dp"
+                app:srcCompat="@drawable/ic_main_exam"
+                app:tint="?colorOnBackground"
                 tools:ignore="contentDescription" />
 
             <TextView
@@ -53,44 +55,105 @@
                 android:text="@string/exam_no_items"
                 android:textSize="20sp" />
         </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/examError"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:visibility="invisible"
+            tools:ignore="UseCompoundDrawables"
+            tools:visibility="invisible">
+
+            <ImageView
+                android:layout_width="100dp"
+                android:layout_height="100dp"
+                app:srcCompat="@drawable/ic_error"
+                app:tint="?colorOnBackground"
+                tools:ignore="contentDescription" />
+
+            <TextView
+                android:id="@+id/examErrorMessage"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="20dp"
+                android:gravity="center"
+                android:padding="8dp"
+                android:text="@string/error_unknown"
+                android:textSize="20sp" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="16dp"
+                android:gravity="center"
+                android:orientation="horizontal">
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/examErrorDetails"
+                    style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="8dp"
+                    android:layout_marginRight="8dp"
+                    android:text="@string/all_details" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/examErrorRetry"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/all_retry" />
+            </LinearLayout>
+        </LinearLayout>
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
 
-    <LinearLayout
+    <io.github.wulkanowy.ui.widgets.MaterialLinearLayout
+        android:id="@+id/examNavContainer"
         android:layout_width="match_parent"
-        android:layout_height="50dp"
+        android:layout_height="48dp"
         android:layout_gravity="bottom"
-        android:background="?android:attr/windowBackground"
-        android:elevation="10dp"
-        android:orientation="horizontal">
+        android:gravity="center"
+        android:orientation="horizontal"
+        tools:ignore="UnusedAttribute">
 
-        <Button
+        <ImageButton
             android:id="@+id/examPreviousButton"
-            style="@style/Widget.AppCompat.Button.Borderless"
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:drawablePadding="4dp"
-            android:gravity="start|center"
-            android:text="@string/all_prev"
-            android:textAlignment="gravity" />
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/all_prev"
+            android:paddingLeft="12dp"
+            android:paddingTop="8dp"
+            android:paddingRight="12dp"
+            android:paddingBottom="8dp"
+            android:scaleType="fitStart"
+            android:tint="?colorPrimary"
+            app:srcCompat="@drawable/ic_chevron_left" />
 
         <TextView
             android:id="@+id/examNavDate"
             android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
+            android:layout_height="match_parent"
+            android:fontFamily="sans-serif"
             android:gravity="center"
-            android:text="@string/app_name" />
+            android:text="@string/app_name"
+            android:textSize="16sp" />
 
-        <Button
+        <ImageButton
             android:id="@+id/examNextButton"
-            style="@style/Widget.AppCompat.Button.Borderless"
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_gravity="end"
             android:layout_weight="1"
-            android:drawablePadding="4dp"
-            android:gravity="end|center"
-            android:text="@string/all_next"
-            android:textAlignment="gravity" />
-    </LinearLayout>
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/all_next"
+            android:paddingLeft="12dp"
+            android:paddingTop="8dp"
+            android:paddingRight="12dp"
+            android:paddingBottom="8dp"
+            android:scaleType="fitEnd"
+            android:tint="?colorPrimary"
+            app:srcCompat="@drawable/ic_chevron_right" />
+    </io.github.wulkanowy.ui.widgets.MaterialLinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/fragment_grade.xml b/app/src/main/res/layout/fragment_grade.xml
index bf8051753..0bc864b2d 100644
--- a/app/src/main/res/layout/fragment_grade.xml
+++ b/app/src/main/res/layout/fragment_grade.xml
@@ -5,34 +5,29 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <io.github.wulkanowy.ui.modules.grade.CustomTabLayout
+    <io.github.wulkanowy.ui.widgets.FittedScrollableTabLayout
         android:id="@+id/gradeTabLayout"
         android:layout_width="match_parent"
         android:layout_height="48dp"
-        android:background="@color/colorPrimary"
-        android:elevation="5dp"
+        android:background="?colorSurface"
         android:visibility="invisible"
-        app:tabIndicatorColor="@android:color/white"
         app:tabMode="scrollable"
-        app:tabTextColor="@android:color/white"
+        app:tabSelectedTextColor="?colorPrimary"
+        app:tabTextColor="@color/material_on_surface_emphasis_medium"
+        tools:ignore="UnusedAttribute"
         tools:visibility="visible" />
 
-    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
-        android:id="@+id/gradeSwipe"
+    <androidx.viewpager.widget.ViewPager
+        android:id="@+id/gradeViewPager"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:layout_marginTop="48dp">
+        android:layout_marginTop="48dp"
+        android:visibility="invisible"
+        tools:visibility="visible" />
 
-        <androidx.viewpager.widget.ViewPager
-            android:id="@+id/gradeViewPager"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:visibility="invisible"
-            tools:visibility="visible" />
-    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
-
-    <ProgressBar
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/gradeProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
@@ -40,29 +35,53 @@
         tools:visibility="invisible" />
 
     <LinearLayout
-        android:id="@+id/gradeEmpty"
+        android:id="@+id/gradeError"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:gravity="center"
         android:orientation="vertical"
         android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables"
         tools:visibility="visible">
 
-        <androidx.appcompat.widget.AppCompatImageView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:minWidth="100dp"
-            android:minHeight="100dp"
-            app:srcCompat="@drawable/ic_menu_main_grade_26dp"
-            app:tint="?android:attr/textColorPrimary"
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_error"
+            app:tint="?colorOnBackground"
             tools:ignore="contentDescription" />
 
         <TextView
+            android:id="@+id/gradeErrorMessage"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginTop="20dp"
             android:gravity="center"
-            android:text="@string/grade_no_items"
+            android:padding="8dp"
+            android:text="@string/error_unknown"
             android:textSize="20sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center"
+            android:orientation="horizontal">
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/gradeErrorDetails"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:text="@string/all_details" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/gradeErrorRetry"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/all_retry" />
+        </LinearLayout>
     </LinearLayout>
 </androidx.coordinatorlayout.widget.CoordinatorLayout>
diff --git a/app/src/main/res/layout/fragment_grade_details.xml b/app/src/main/res/layout/fragment_grade_details.xml
index 610006e17..a1faefe7a 100644
--- a/app/src/main/res/layout/fragment_grade_details.xml
+++ b/app/src/main/res/layout/fragment_grade_details.xml
@@ -13,11 +13,13 @@
         <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/gradeDetailsRecycler"
             android:layout_width="match_parent"
-            android:layout_height="match_parent" />
+            android:layout_height="match_parent"
+            tools:listitem="@layout/item_grade_details" />
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
-    <ProgressBar
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/gradeDetailsProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
@@ -30,15 +32,14 @@
         android:layout_height="match_parent"
         android:gravity="center"
         android:orientation="vertical"
-        android:visibility="invisible">
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables">
 
-        <androidx.appcompat.widget.AppCompatImageView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:minWidth="100dp"
-            android:minHeight="100dp"
-            app:srcCompat="@drawable/ic_menu_main_grade_26dp"
-            app:tint="?android:attr/textColorPrimary"
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_main_grade"
+            app:tint="?colorOnBackground"
             tools:ignore="contentDescription" />
 
         <TextView
@@ -49,4 +50,55 @@
             android:text="@string/grade_no_items"
             android:textSize="20sp" />
     </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/gradeDetailsError"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables"
+        tools:visibility="invisible">
+
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_error"
+            app:tint="?colorOnBackground"
+            tools:ignore="contentDescription" />
+
+        <TextView
+            android:id="@+id/gradeDetailsErrorMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:padding="8dp"
+            android:text="@string/error_unknown"
+            android:textSize="20sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center"
+            android:orientation="horizontal">
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/gradeDetailsErrorDetails"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:text="@string/all_details" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/gradeDetailsErrorRetry"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/all_retry" />
+        </LinearLayout>
+    </LinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/fragment_grade_statistics.xml b/app/src/main/res/layout/fragment_grade_statistics.xml
index 9c7f37952..10c8bb195 100644
--- a/app/src/main/res/layout/fragment_grade_statistics.xml
+++ b/app/src/main/res/layout/fragment_grade_statistics.xml
@@ -6,24 +6,22 @@
     android:orientation="vertical"
     tools:context=".ui.modules.grade.statistics.GradeStatisticsFragment">
 
-    <LinearLayout
+    <io.github.wulkanowy.ui.widgets.MaterialLinearLayout
         android:id="@+id/gradeStatisticsSubjectsContainer"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:background="?android:attr/windowBackground"
-        android:elevation="5dp"
+        android:background="?android:windowBackground"
         android:padding="5dp"
         android:visibility="invisible"
+        tools:ignore="UnusedAttribute"
         tools:listitem="@layout/item_attendance_summary"
-        tools:targetApi="lollipop"
         tools:visibility="visible">
 
-        <androidx.appcompat.widget.AppCompatSpinner
+        <Spinner
             android:id="@+id/gradeStatisticsSubjects"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:ellipsize="middle"
-            android:entries="@array/endpoints_keys"
             android:paddingStart="10dp"
             android:paddingLeft="10dp"
             android:paddingTop="10dp"
@@ -31,7 +29,7 @@
             android:paddingRight="30dp"
             android:paddingBottom="10dp"
             android:spinnerMode="dialog" />
-    </LinearLayout>
+    </io.github.wulkanowy.ui.widgets.MaterialLinearLayout>
 
 
     <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
@@ -39,7 +37,7 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content">
 
-        <ScrollView
+        <androidx.core.widget.NestedScrollView
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:fillViewport="true">
@@ -49,32 +47,45 @@
                 android:layout_height="wrap_content"
                 android:orientation="vertical">
 
-                <RadioGroup
-                    android:id="@+id/gradeStatisticsTypeSwitch"
-                    android:layout_width="fill_parent"
+                <HorizontalScrollView
+                    android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:layout_gravity="center"
-                    android:gravity="center"
-                    android:orientation="horizontal"
-                    android:paddingTop="5dp"
-                    android:visibility="invisible"
-                    tools:visibility="visible">
+                    android:layout_gravity="center">
 
-                    <RadioButton
-                        android:id="@+id/gradeStatisticsTypePartial"
+                    <RadioGroup
+                        android:id="@+id/gradeStatisticsTypeSwitch"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
-                        android:checked="true"
-                        android:tag="partial"
-                        android:text="@string/grade_statistics_partial" />
+                        android:orientation="horizontal"
+                        android:paddingStart="16dp"
+                        android:paddingTop="5dp"
+                        android:paddingEnd="16dp"
+                        android:visibility="invisible"
+                        tools:visibility="visible">
 
-                    <RadioButton
-                        android:id="@+id/gradeStatisticsTypeSemester"
-                        android:layout_width="wrap_content"
-                        android:layout_height="wrap_content"
-                        android:tag="annual"
-                        android:text="@string/grade_statistics_semester" />
-                </RadioGroup>
+                        <com.google.android.material.radiobutton.MaterialRadioButton
+                            android:id="@+id/gradeStatisticsTypePartial"
+                            android:layout_width="wrap_content"
+                            android:layout_height="wrap_content"
+                            android:checked="true"
+                            android:tag="partial"
+                            android:text="@string/grade_statistics_partial" />
+
+                        <com.google.android.material.radiobutton.MaterialRadioButton
+                            android:id="@+id/gradeStatisticsTypeSemester"
+                            android:layout_width="wrap_content"
+                            android:layout_height="wrap_content"
+                            android:tag="annual"
+                            android:text="@string/grade_statistics_semester" />
+
+                        <com.google.android.material.radiobutton.MaterialRadioButton
+                            android:id="@+id/gradeStatisticsTypePoints"
+                            android:layout_width="wrap_content"
+                            android:layout_height="wrap_content"
+                            android:tag="points"
+                            android:text="@string/grade_statistics_points" />
+                    </RadioGroup>
+                </HorizontalScrollView>
 
                 <FrameLayout
                     android:layout_width="match_parent"
@@ -85,13 +96,24 @@
                         android:layout_width="match_parent"
                         android:layout_height="match_parent"
                         android:layout_margin="10dp"
-                        android:background="?android:attr/windowBackground"
+                        android:background="?android:windowBackground"
                         android:minHeight="400dp"
                         android:visibility="gone"
                         tools:visibility="visible" />
 
-                    <ProgressBar
+                    <com.github.mikephil.charting.charts.BarChart
+                        android:id="@+id/gradeStatisticsChartPoints"
+                        android:layout_width="match_parent"
+                        android:layout_height="match_parent"
+                        android:layout_margin="10dp"
+                        android:background="?android:windowBackground"
+                        android:minHeight="400dp"
+                        android:visibility="gone"
+                        tools:visibility="visible" />
+
+                    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
                         android:id="@+id/gradeStatisticsProgress"
+                        style="@style/Widget.MaterialProgressBar.ProgressBar"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
                         android:layout_gravity="center"
@@ -104,15 +126,14 @@
                         android:layout_height="match_parent"
                         android:gravity="center"
                         android:orientation="vertical"
-                        android:visibility="invisible">
+                        android:visibility="invisible"
+                        tools:ignore="UseCompoundDrawables">
 
-                        <androidx.appcompat.widget.AppCompatImageView
-                            android:layout_width="wrap_content"
-                            android:layout_height="wrap_content"
-                            android:minWidth="100dp"
-                            android:minHeight="100dp"
-                            app:srcCompat="@drawable/ic_menu_main_grade_26dp"
-                            app:tint="?android:attr/textColorPrimary"
+                        <ImageView
+                            android:layout_width="100dp"
+                            android:layout_height="100dp"
+                            app:srcCompat="@drawable/ic_main_grade"
+                            app:tint="?colorOnBackground"
                             tools:ignore="contentDescription" />
 
                         <TextView
@@ -123,8 +144,60 @@
                             android:text="@string/grade_no_items"
                             android:textSize="20sp" />
                     </LinearLayout>
+
+
+                    <LinearLayout
+                        android:id="@+id/gradeStatisticsError"
+                        android:layout_width="match_parent"
+                        android:layout_height="match_parent"
+                        android:gravity="center"
+                        android:orientation="vertical"
+                        android:visibility="invisible"
+                        tools:ignore="UseCompoundDrawables"
+                        tools:visibility="invisible">
+
+                        <ImageView
+                            android:layout_width="100dp"
+                            android:layout_height="100dp"
+                            app:srcCompat="@drawable/ic_error"
+                            app:tint="?colorOnBackground"
+                            tools:ignore="contentDescription" />
+
+                        <TextView
+                            android:id="@+id/gradeStatisticsErrorMessage"
+                            android:layout_width="wrap_content"
+                            android:layout_height="wrap_content"
+                            android:layout_marginTop="20dp"
+                            android:gravity="center"
+                            android:padding="8dp"
+                            android:text="@string/error_unknown"
+                            android:textSize="20sp" />
+
+                        <LinearLayout
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:layout_marginTop="16dp"
+                            android:gravity="center"
+                            android:orientation="horizontal">
+
+                            <com.google.android.material.button.MaterialButton
+                                android:id="@+id/gradeStatisticsErrorDetails"
+                                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                                android:layout_width="wrap_content"
+                                android:layout_height="wrap_content"
+                                android:layout_marginEnd="8dp"
+                                android:layout_marginRight="8dp"
+                                android:text="@string/all_details" />
+
+                            <com.google.android.material.button.MaterialButton
+                                android:id="@+id/gradeStatisticsErrorRetry"
+                                android:layout_width="wrap_content"
+                                android:layout_height="wrap_content"
+                                android:text="@string/all_retry" />
+                        </LinearLayout>
+                    </LinearLayout>
                 </FrameLayout>
             </LinearLayout>
-        </ScrollView>
+        </androidx.core.widget.NestedScrollView>
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/fragment_grade_summary.xml b/app/src/main/res/layout/fragment_grade_summary.xml
index 92a34f71c..3f21e61c7 100644
--- a/app/src/main/res/layout/fragment_grade_summary.xml
+++ b/app/src/main/res/layout/fragment_grade_summary.xml
@@ -13,11 +13,13 @@
         <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/gradeSummaryRecycler"
             android:layout_width="match_parent"
-            android:layout_height="match_parent" />
+            android:layout_height="match_parent"
+            tools:listitem="@layout/item_grade_summary" />
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
-    <ProgressBar
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/gradeSummaryProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
@@ -30,15 +32,14 @@
         android:layout_height="match_parent"
         android:gravity="center"
         android:orientation="vertical"
-        android:visibility="invisible">
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables">
 
-        <androidx.appcompat.widget.AppCompatImageView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:minWidth="100dp"
-            android:minHeight="100dp"
-            app:srcCompat="@drawable/ic_menu_main_grade_26dp"
-            app:tint="?android:attr/textColorPrimary"
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_main_grade"
+            app:tint="?colorOnBackground"
             tools:ignore="contentDescription" />
 
         <TextView
@@ -49,4 +50,55 @@
             android:text="@string/grade_no_items"
             android:textSize="20sp" />
     </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/gradeSummaryError"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables"
+        tools:visibility="invisible">
+
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_error"
+            app:tint="?colorOnBackground"
+            tools:ignore="contentDescription" />
+
+        <TextView
+            android:id="@+id/gradeSummaryErrorMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:padding="8dp"
+            android:text="@string/error_unknown"
+            android:textSize="20sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center"
+            android:orientation="horizontal">
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/gradeSummaryErrorDetails"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:text="@string/all_details" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/gradeSummaryErrorRetry"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/all_retry" />
+        </LinearLayout>
+    </LinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/fragment_homework.xml b/app/src/main/res/layout/fragment_homework.xml
index a2e87bcca..0fcde9c07 100644
--- a/app/src/main/res/layout/fragment_homework.xml
+++ b/app/src/main/res/layout/fragment_homework.xml
@@ -2,15 +2,17 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    tools:context=".ui.modules.homework.HomeworkFragment">
 
     <androidx.coordinatorlayout.widget.CoordinatorLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_marginBottom="50dp">
 
-        <ProgressBar
+        <me.zhanghai.android.materialprogressbar.MaterialProgressBar
             android:id="@+id/homeworkProgress"
+            style="@style/Widget.MaterialProgressBar.ProgressBar"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
@@ -24,7 +26,8 @@
             <androidx.recyclerview.widget.RecyclerView
                 android:id="@+id/homeworkRecycler"
                 android:layout_width="match_parent"
-                android:layout_height="match_parent" />
+                android:layout_height="match_parent"
+                tools:listitem="@layout/item_homework" />
         </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
         <LinearLayout
@@ -34,15 +37,14 @@
             android:gravity="center"
             android:orientation="vertical"
             android:padding="10dp"
-            android:visibility="gone">
+            android:visibility="gone"
+            tools:ignore="UseCompoundDrawables">
 
-            <androidx.appcompat.widget.AppCompatImageView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:minWidth="100dp"
-                android:minHeight="100dp"
-                app:srcCompat="@drawable/ic_menu_main_homework_24dp"
-                app:tint="?android:attr/textColorPrimary"
+            <ImageView
+                android:layout_width="100dp"
+                android:layout_height="100dp"
+                app:srcCompat="@drawable/ic_more_homework"
+                app:tint="?colorOnBackground"
                 tools:ignore="contentDescription" />
 
             <TextView
@@ -53,44 +55,105 @@
                 android:text="@string/homework_no_items"
                 android:textSize="20sp" />
         </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/homeworkError"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:visibility="invisible"
+            tools:ignore="UseCompoundDrawables"
+            tools:visibility="invisible">
+
+            <ImageView
+                android:layout_width="100dp"
+                android:layout_height="100dp"
+                app:srcCompat="@drawable/ic_error"
+                app:tint="?colorOnBackground"
+                tools:ignore="contentDescription" />
+
+            <TextView
+                android:id="@+id/homeworkErrorMessage"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="20dp"
+                android:gravity="center"
+                android:padding="8dp"
+                android:text="@string/error_unknown"
+                android:textSize="20sp" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="16dp"
+                android:gravity="center"
+                android:orientation="horizontal">
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/homeworkErrorDetails"
+                    style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="8dp"
+                    android:layout_marginRight="8dp"
+                    android:text="@string/all_details" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/homeworkErrorRetry"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/all_retry" />
+            </LinearLayout>
+        </LinearLayout>
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
 
-    <LinearLayout
+    <io.github.wulkanowy.ui.widgets.MaterialLinearLayout
+        android:id="@+id/homeworkNavContainer"
         android:layout_width="match_parent"
-        android:layout_height="50dp"
+        android:layout_height="48dp"
         android:layout_gravity="bottom"
-        android:background="?android:attr/windowBackground"
-        android:elevation="10dp"
-        android:orientation="horizontal">
+        android:gravity="center"
+        android:orientation="horizontal"
+        tools:ignore="UnusedAttribute">
 
-        <Button
+        <ImageButton
             android:id="@+id/homeworkPreviousButton"
-            style="@style/Widget.AppCompat.Button.Borderless"
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:drawablePadding="4dp"
-            android:gravity="start|center"
-            android:text="@string/all_prev"
-            android:textAlignment="gravity" />
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/all_prev"
+            android:paddingLeft="12dp"
+            android:paddingTop="8dp"
+            android:paddingRight="12dp"
+            android:paddingBottom="8dp"
+            android:scaleType="fitStart"
+            android:tint="?colorPrimary"
+            app:srcCompat="@drawable/ic_chevron_left" />
 
         <TextView
             android:id="@+id/homeworkNavDate"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
+            android:fontFamily="sans-serif"
             android:gravity="center"
-            android:text="@string/app_name" />
+            android:text="@string/app_name"
+            android:textSize="16sp" />
 
-        <Button
+        <ImageButton
             android:id="@+id/homeworkNextButton"
-            style="@style/Widget.AppCompat.Button.Borderless"
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_gravity="end"
             android:layout_weight="1"
-            android:drawablePadding="4dp"
-            android:gravity="end|center"
-            android:text="@string/all_next"
-            android:textAlignment="gravity" />
-    </LinearLayout>
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/all_next"
+            android:paddingLeft="12dp"
+            android:paddingTop="8dp"
+            android:paddingRight="12dp"
+            android:paddingBottom="8dp"
+            android:scaleType="fitEnd"
+            android:tint="?colorPrimary"
+            app:srcCompat="@drawable/ic_chevron_right" />
+    </io.github.wulkanowy.ui.widgets.MaterialLinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/fragment_license.xml b/app/src/main/res/layout/fragment_license.xml
new file mode 100644
index 000000000..80ecd6b10
--- /dev/null
+++ b/app/src/main/res/layout/fragment_license.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
+        android:id="@+id/licenseProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:indeterminate="true" />
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/licenseRecycler"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+</FrameLayout>
diff --git a/app/src/main/res/layout/fragment_login_advanced.xml b/app/src/main/res/layout/fragment_login_advanced.xml
new file mode 100644
index 000000000..15e0904b6
--- /dev/null
+++ b/app/src/main/res/layout/fragment_login_advanced.xml
@@ -0,0 +1,267 @@
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ui.modules.login.advanced.LoginAdvancedFragment">
+
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
+        android:id="@+id/loginFormProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:indeterminate="true"
+        android:visibility="gone" />
+
+    <androidx.core.widget.NestedScrollView
+        android:id="@+id/nestedScrollView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:fillViewport="true">
+
+        <androidx.constraintlayout.widget.ConstraintLayout
+            android:id="@+id/loginFormContainer"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content">
+
+            <TextView
+                android:id="@+id/loginFormHeader"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="32dp"
+                android:layout_marginLeft="32dp"
+                android:layout_marginTop="32dp"
+                android:layout_marginEnd="32dp"
+                android:layout_marginRight="32dp"
+                android:gravity="center_horizontal"
+                android:text="@string/login_header_default"
+                android:textSize="16sp"
+                app:fontFamily="sans-serif-light"
+                app:layout_constraintBottom_toTopOf="@+id/loginTypeSwitch"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toTopOf="parent"
+                app:layout_constraintVertical_chainStyle="packed" />
+
+            <RadioGroup
+                android:id="@+id/loginTypeSwitch"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:gravity="center"
+                android:orientation="horizontal"
+                android:paddingTop="24dp"
+                app:layout_constraintBottom_toTopOf="@+id/loginFormNameLayout"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/loginFormHeader">
+
+                <RadioButton
+                    android:id="@+id/loginTypeApi"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:tag="api"
+                    android:text="@string/login_type_api" />
+
+                <RadioButton
+                    android:id="@+id/loginTypeScrapper"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:checked="true"
+                    android:tag="scrapper"
+                    android:text="@string/login_type_scrapper" />
+
+                <RadioButton
+                    android:id="@+id/loginTypeHybrid"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:tag="hybrid"
+                    android:text="@string/login_type_hybrid" />
+            </RadioGroup>
+
+            <com.google.android.material.textfield.TextInputLayout
+                android:id="@+id/loginFormNameLayout"
+                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="24dp"
+                android:layout_marginLeft="24dp"
+                android:layout_marginTop="24dp"
+                android:layout_marginEnd="24dp"
+                android:layout_marginRight="24dp"
+                android:hint="@string/login_nickname_hint"
+                app:errorEnabled="true"
+                app:layout_constraintBottom_toTopOf="@+id/loginFormPassLayout"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/loginTypeSwitch">
+
+                <com.google.android.material.textfield.TextInputEditText
+                    android:id="@+id/loginFormName"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:autofillHints="emailAddress"
+                    android:inputType="textEmailAddress"
+                    android:maxLines="1"
+                    tools:targetApi="o" />
+
+                <requestFocus />
+            </com.google.android.material.textfield.TextInputLayout>
+
+            <com.google.android.material.textfield.TextInputLayout
+                android:id="@+id/loginFormPassLayout"
+                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="24dp"
+                android:layout_marginLeft="24dp"
+                android:layout_marginTop="8dp"
+                android:layout_marginEnd="24dp"
+                android:layout_marginRight="24dp"
+                android:hint="@string/login_password_hint"
+                app:errorEnabled="true"
+                app:layout_constraintBottom_toTopOf="@+id/loginFormHostLayout"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/loginFormNameLayout"
+                app:passwordToggleEnabled="true">
+
+                <com.google.android.material.textfield.TextInputEditText
+                    android:id="@+id/loginFormPass"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:autofillHints="password"
+                    android:imeActionLabel="@string/login_sign_in"
+                    android:imeOptions="actionDone"
+                    android:inputType="textPassword"
+                    android:maxLines="1"
+                    app:fontFamily="sans-serif"
+                    tools:targetApi="o" />
+
+            </com.google.android.material.textfield.TextInputLayout>
+
+            <com.google.android.material.textfield.TextInputLayout
+                android:id="@+id/loginFormHostLayout"
+                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox.ExposedDropdownMenu"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="24dp"
+                android:layout_marginLeft="24dp"
+                android:layout_marginTop="8dp"
+                android:layout_marginEnd="24dp"
+                android:layout_marginRight="24dp"
+                android:layout_marginBottom="16dp"
+                android:hint="@string/login_host_hint"
+                android:orientation="vertical"
+                app:layout_constraintBottom_toTopOf="@+id/loginFormTokenLayout"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/loginFormPassLayout">
+
+                <AutoCompleteTextView
+                    android:id="@+id/loginFormHost"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:editable="false"
+                    tools:ignore="Deprecated,LabelFor" />
+            </com.google.android.material.textfield.TextInputLayout>
+
+            <com.google.android.material.textfield.TextInputLayout
+                android:id="@+id/loginFormTokenLayout"
+                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="24dp"
+                android:layout_marginLeft="24dp"
+                android:layout_marginTop="8dp"
+                android:layout_marginEnd="24dp"
+                android:layout_marginRight="24dp"
+                android:hint="@string/login_token_hint"
+                app:errorEnabled="true"
+                app:layout_constraintBottom_toTopOf="@+id/loginFormSymbolLayout"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/loginFormHostLayout">
+
+                <com.google.android.material.textfield.TextInputEditText
+                    android:id="@+id/loginFormToken"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:inputType="textCapCharacters"
+                    android:maxLines="1" />
+            </com.google.android.material.textfield.TextInputLayout>
+
+            <com.google.android.material.textfield.TextInputLayout
+                android:id="@+id/loginFormSymbolLayout"
+                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="24dp"
+                android:layout_marginLeft="24dp"
+                android:layout_marginTop="8dp"
+                android:layout_marginEnd="24dp"
+                android:layout_marginRight="24dp"
+                android:hint="@string/login_symbol_hint"
+                app:errorEnabled="true"
+                app:layout_constraintBottom_toTopOf="@+id/loginFormPinLayout"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/loginFormTokenLayout">
+
+                <AutoCompleteTextView
+                    android:id="@+id/loginFormSymbol"
+                    style="@style/Widget.MaterialComponents.TextInputEditText.OutlinedBox"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:imeActionLabel="@string/login_sign_in"
+                    android:imeOptions="actionDone"
+                    android:inputType="textAutoComplete|textNoSuggestions"
+                    android:maxLines="1"
+                    tools:ignore="LabelFor" />
+            </com.google.android.material.textfield.TextInputLayout>
+
+            <com.google.android.material.textfield.TextInputLayout
+                android:id="@+id/loginFormPinLayout"
+                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="24dp"
+                android:layout_marginLeft="24dp"
+                android:layout_marginTop="8dp"
+                android:layout_marginEnd="24dp"
+                android:layout_marginRight="24dp"
+                android:hint="@string/login_pin_hint"
+                app:errorEnabled="true"
+                app:layout_constraintBottom_toTopOf="@id/loginFormSignIn"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@id/loginFormSymbolLayout">
+
+                <com.google.android.material.textfield.TextInputEditText
+                    android:id="@+id/loginFormPin"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:imeActionLabel="@string/login_sign_in"
+                    android:imeOptions="actionDone"
+                    android:inputType="number"
+                    android:maxLines="1" />
+            </com.google.android.material.textfield.TextInputLayout>
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/loginFormSignIn"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_vertical"
+                android:layout_marginTop="8dp"
+                android:layout_marginEnd="24dp"
+                android:layout_marginRight="24dp"
+                android:layout_marginBottom="16dp"
+                android:text="@string/login_sign_in"
+                app:layout_constraintBottom_toBottomOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/loginFormPinLayout" />
+
+        </androidx.constraintlayout.widget.ConstraintLayout>
+    </androidx.core.widget.NestedScrollView>
+</FrameLayout>
diff --git a/app/src/main/res/layout/fragment_login_form.xml b/app/src/main/res/layout/fragment_login_form.xml
index 81baf4afc..bb93c1827 100644
--- a/app/src/main/res/layout/fragment_login_form.xml
+++ b/app/src/main/res/layout/fragment_login_form.xml
@@ -2,10 +2,12 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    tools:context=".ui.modules.login.form.LoginFormFragment">
 
-    <ProgressBar
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/loginFormProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
@@ -22,7 +24,73 @@
         <androidx.constraintlayout.widget.ConstraintLayout
             android:id="@+id/loginFormContainer"
             android:layout_width="match_parent"
-            android:layout_height="wrap_content">
+            android:layout_height="wrap_content"
+            android:paddingBottom="16dp">
+
+            <LinearLayout
+                android:id="@+id/loginFormContact"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:visibility="gone"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toTopOf="parent"
+                tools:visibility="visible">
+
+                <TextView
+                    android:id="@+id/loginFormContactHeader"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="32dp"
+                    android:layout_marginLeft="32dp"
+                    android:layout_marginTop="16dp"
+                    android:layout_marginEnd="32dp"
+                    android:layout_marginRight="32dp"
+                    android:layout_marginBottom="16dp"
+                    android:gravity="center_horizontal"
+                    android:text="@string/login_contact_header"
+                    android:textSize="14sp"
+                    app:fontFamily="sans-serif-medium" />
+
+                <LinearLayout
+                    android:id="@+id/loginFormContactButtons"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginLeft="16dp"
+                    android:layout_marginRight="16dp"
+                    android:orientation="horizontal">
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/loginFormContactEmail"
+                        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_marginEnd="8dp"
+                        android:layout_marginRight="8dp"
+                        android:layout_weight="1"
+                        android:text="@string/login_contact_email"
+                        app:icon="@drawable/ic_more_messages" />
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/loginFormFaq"
+                        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="8dp"
+                        android:layout_marginLeft="8dp"
+                        android:layout_weight="1"
+                        android:text="@string/about_faq"
+                        app:icon="@drawable/ic_about_faq" />
+                </LinearLayout>
+
+                <View
+                    android:id="@+id/loginFormContactDivider"
+                    android:layout_width="match_parent"
+                    android:layout_height="1dp"
+                    android:layout_marginTop="8dp"
+                    android:background="?android:attr/listDivider" />
+            </LinearLayout>
 
             <TextView
                 android:id="@+id/loginFormHeader"
@@ -39,9 +107,8 @@
                 app:fontFamily="sans-serif-light"
                 app:layout_constraintBottom_toTopOf="@+id/loginFormNameLayout"
                 app:layout_constraintEnd_toEndOf="parent"
-                app:layout_constraintHorizontal_bias="0.5"
                 app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintTop_toTopOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/loginFormContact"
                 app:layout_constraintVertical_chainStyle="packed" />
 
 
@@ -59,16 +126,17 @@
                 app:errorEnabled="true"
                 app:layout_constraintBottom_toTopOf="@+id/loginFormPassLayout"
                 app:layout_constraintEnd_toEndOf="parent"
-                app:layout_constraintHorizontal_bias="0.5"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@+id/loginFormHeader">
 
-                <androidx.appcompat.widget.AppCompatEditText
+                <com.google.android.material.textfield.TextInputEditText
                     android:id="@+id/loginFormName"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
+                    android:autofillHints="emailAddress"
                     android:inputType="textEmailAddress"
-                    android:maxLines="1" />
+                    android:maxLines="1"
+                    tools:targetApi="o" />
 
                 <requestFocus />
             </com.google.android.material.textfield.TextInputLayout>
@@ -87,25 +155,27 @@
                 app:errorEnabled="true"
                 app:layout_constraintBottom_toTopOf="@+id/loginFormHostLayout"
                 app:layout_constraintEnd_toEndOf="parent"
-                app:layout_constraintHorizontal_bias="0.5"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@+id/loginFormNameLayout"
                 app:passwordToggleEnabled="true">
 
-                <androidx.appcompat.widget.AppCompatEditText
+                <com.google.android.material.textfield.TextInputEditText
                     android:id="@+id/loginFormPass"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
+                    android:autofillHints="password"
                     android:imeActionLabel="@string/login_sign_in"
                     android:imeOptions="actionDone"
                     android:inputType="textPassword"
                     android:maxLines="1"
-                    app:fontFamily="sans-serif" />
+                    app:fontFamily="sans-serif"
+                    tools:targetApi="o" />
 
             </com.google.android.material.textfield.TextInputLayout>
 
-            <LinearLayout
+            <com.google.android.material.textfield.TextInputLayout
                 android:id="@+id/loginFormHostLayout"
+                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox.ExposedDropdownMenu"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginStart="24dp"
@@ -113,73 +183,78 @@
                 android:layout_marginTop="16dp"
                 android:layout_marginEnd="24dp"
                 android:layout_marginRight="24dp"
-                android:background="@drawable/ic_login_outlined_border"
+                android:hint="@string/login_host_hint"
                 android:orientation="vertical"
                 app:layout_constraintBottom_toTopOf="@+id/loginFormSignIn"
                 app:layout_constraintEnd_toEndOf="parent"
-                app:layout_constraintHorizontal_bias="0.5"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@+id/loginFormPassLayout">
 
-                <androidx.appcompat.widget.AppCompatSpinner
+                <AutoCompleteTextView
                     android:id="@+id/loginFormHost"
                     android:layout_width="match_parent"
-                    android:layout_height="56dp" />
-            </LinearLayout>
+                    android:layout_height="wrap_content"
+                    android:editable="false"
+                    tools:ignore="Deprecated,LabelFor" />
+            </com.google.android.material.textfield.TextInputLayout>
 
-            <TextView
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/loginFormAdvancedButton"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_marginStart="7dp"
-                android:layout_marginLeft="7dp"
-                android:layout_marginBottom="48dp"
-                android:background="?android:colorBackground"
-                android:paddingLeft="4dp"
-                android:paddingRight="4dp"
-                android:text="@string/login_host_hint"
-                android:textColor="?android:textColorHint"
-                android:textSize="12sp"
-                app:layout_constraintBottom_toBottomOf="@+id/loginFormHostLayout"
-                app:layout_constraintEnd_toEndOf="@+id/loginFormHostLayout"
+                android:layout_marginEnd="16dp"
+                android:layout_marginRight="16dp"
+                android:text="@string/login_advanced"
+                android:textAppearance="?android:textAppearance"
+                android:textColor="@color/colorPrimary"
+                app:backgroundTint="?android:windowBackground"
+                app:fontFamily="sans-serif-medium"
+                app:layout_constraintBottom_toBottomOf="@id/loginFormSignIn"
+                app:layout_constraintEnd_toStartOf="@+id/loginFormSignIn"
                 app:layout_constraintHorizontal_bias="0.0"
-                app:layout_constraintStart_toStartOf="@+id/loginFormHostLayout" />
+                app:layout_constraintStart_toStartOf="@id/loginFormHostLayout"
+                app:layout_constraintTop_toTopOf="@+id/loginFormSignIn" />
 
             <com.google.android.material.button.MaterialButton
                 android:id="@+id/loginFormSignIn"
-                style="@style/Widget.MaterialComponents.Button"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center_vertical"
                 android:layout_marginTop="48dp"
                 android:layout_marginEnd="24dp"
                 android:layout_marginRight="24dp"
-                android:layout_marginBottom="48dp"
+                android:layout_marginBottom="16dp"
                 android:text="@string/login_sign_in"
-                android:textAppearance="?android:textAppearanceSmall"
-                android:textColor="@android:color/white"
-                android:textStyle="bold"
-                app:backgroundTint="@color/colorPrimary"
                 app:layout_constraintBottom_toBottomOf="parent"
                 app:layout_constraintEnd_toEndOf="parent"
-                app:layout_constraintTop_toBottomOf="@+id/loginFormHostLayout"
-                app:layout_constraintVertical_bias="1.0" />
+                app:layout_constraintTop_toBottomOf="@+id/loginFormHostLayout" />
+
+            <TextView
+                android:id="@+id/loginFormPrivacyLink"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="24dp"
+                android:gravity="start|center_vertical"
+                android:text="@string/login_privacy_policy"
+                android:textColor="?android:textColorSecondary"
+                android:textSize="12sp"
+                app:fontFamily="sans-serif-medium"
+                app:layout_constraintStart_toStartOf="@id/loginFormAdvancedButton"
+                app:layout_constraintTop_toBottomOf="@+id/loginFormAdvancedButton"
+                tools:visibility="visible" />
 
             <TextView
                 android:id="@+id/loginFormVersion"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_gravity="center_vertical"
-                android:layout_marginStart="24dp"
-                android:layout_marginLeft="24dp"
-                android:layout_marginEnd="16dp"
-                android:layout_marginRight="16dp"
+                android:layout_marginTop="24dp"
                 android:maxLines="2"
                 android:textColor="?android:textColorSecondary"
                 android:textSize="12sp"
-                app:layout_constraintBottom_toBottomOf="@id/loginFormSignIn"
-                app:layout_constraintEnd_toStartOf="@+id/loginFormSignIn"
-                app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintTop_toTopOf="@+id/loginFormSignIn"
+                android:visibility="visible"
+                app:layout_constraintEnd_toEndOf="@+id/loginFormSignIn"
+                app:layout_constraintTop_toBottomOf="@id/loginFormSignIn"
                 tools:text="Version 1.0.0" />
         </androidx.constraintlayout.widget.ConstraintLayout>
     </androidx.core.widget.NestedScrollView>
diff --git a/app/src/main/res/layout/fragment_login_student_select.xml b/app/src/main/res/layout/fragment_login_student_select.xml
index 72af7293a..64e06cbd5 100644
--- a/app/src/main/res/layout/fragment_login_student_select.xml
+++ b/app/src/main/res/layout/fragment_login_student_select.xml
@@ -1,21 +1,139 @@
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">
 
-    <ProgressBar
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/loginStudentSelectProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
         android:indeterminate="true"
         android:visibility="gone" />
 
-    <androidx.recyclerview.widget.RecyclerView
-        android:id="@+id/loginStudentSelectRecycler"
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/loginStudentSelectContent"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        tools:itemCount="5"
-        tools:listitem="@layout/item_login_student_select" />
+        android:layout_height="match_parent">
+
+        <LinearLayout
+            android:id="@+id/loginStudentSelectContact"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            android:visibility="gone"
+            tools:visibility="visible">
+
+            <View
+                android:id="@+id/loginStudentSelectContactTopDivider"
+                android:layout_width="match_parent"
+                android:layout_height="1dp"
+                android:background="?android:attr/listDivider" />
+
+            <TextView
+                android:id="@+id/loginStudentSelectContactHeader"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="32dp"
+                android:layout_marginLeft="32dp"
+                android:layout_marginEnd="32dp"
+                android:layout_marginRight="32dp"
+                android:layout_marginTop="16dp"
+                android:layout_marginBottom="16dp"
+                android:gravity="center_horizontal"
+                android:text="@string/login_contact_header"
+                android:textSize="14sp"
+                app:fontFamily="sans-serif-medium" />
+
+            <LinearLayout
+                android:id="@+id/loginStudentSelectContactButtons"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal"
+                android:layout_marginLeft="16dp"
+                android:layout_marginRight="16dp">
+                <com.google.android.material.button.MaterialButton
+                    style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                    android:id="@+id/loginStudentSelectContactEmail"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:layout_marginRight="8dp"
+                    android:layout_marginEnd="8dp"
+                    android:text="@string/login_contact_email"
+                    app:icon="@drawable/ic_more_messages" />
+
+                <com.google.android.material.button.MaterialButton
+                    style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                    android:id="@+id/loginStudentSelectContactDiscord"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:layout_marginLeft="8dp"
+                    android:layout_marginStart="8dp"
+                    android:text="@string/login_contact_discord"
+                    app:icon="@drawable/ic_about_discord" />
+            </LinearLayout>
+
+            <View
+                android:id="@+id/loginStudentSelectContactBottomDivider"
+                android:layout_width="match_parent"
+                android:layout_height="1dp"
+                android:layout_marginTop="8dp"
+                android:background="?android:attr/listDivider" />
+        </LinearLayout>
+
+        <TextView
+            android:id="@+id/loginStudentSelectHeader"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="32dp"
+            android:layout_marginLeft="32dp"
+            android:layout_marginEnd="32dp"
+            android:layout_marginRight="32dp"
+            android:layout_marginTop="32dp"
+            android:layout_marginBottom="32dp"
+            android:gravity="center_horizontal"
+            android:text="@string/login_select_student"
+            android:textSize="16sp"
+            app:fontFamily="sans-serif-light"
+            app:layout_constraintBottom_toTopOf="@id/loginStudentSelectRecycler"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/loginStudentSelectContact"
+            app:layout_constraintVertical_chainStyle="packed" />
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/loginStudentSelectRecycler"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:minHeight="144dp"
+            app:layout_constrainedHeight="true"
+            app:layout_constraintBottom_toTopOf="@id/loginStudentSelectSignIn"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHeight_max="432dp"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/loginStudentSelectHeader"
+            tools:itemCount="6"
+            tools:listitem="@layout/item_login_student_select" />
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/loginStudentSelectSignIn"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="32dp"
+            android:layout_marginEnd="24dp"
+            android:layout_marginRight="24dp"
+            android:layout_marginBottom="32dp"
+            android:text="@string/login_sign_in"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/loginStudentSelectRecycler" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/fragment_login_symbol.xml b/app/src/main/res/layout/fragment_login_symbol.xml
index 6cdf7ef03..56b4a32e5 100644
--- a/app/src/main/res/layout/fragment_login_symbol.xml
+++ b/app/src/main/res/layout/fragment_login_symbol.xml
@@ -2,10 +2,12 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    tools:context=".ui.modules.login.symbol.LoginSymbolFragment">
 
-    <ProgressBar
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/loginSymbolProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
@@ -23,13 +25,83 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content">
 
+            <LinearLayout
+                android:id="@+id/loginSymbolContact"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:visibility="gone"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toTopOf="parent"
+                tools:visibility="visible">
+
+                <View
+                    android:id="@+id/loginSymbolContactTopDivider"
+                    android:layout_width="match_parent"
+                    android:layout_height="1dp"
+                    android:background="?android:attr/listDivider" />
+
+                <TextView
+                    android:id="@+id/loginSymbolContactHeader"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="32dp"
+                    android:layout_marginLeft="32dp"
+                    android:layout_marginTop="16dp"
+                    android:layout_marginEnd="32dp"
+                    android:layout_marginRight="32dp"
+                    android:layout_marginBottom="16dp"
+                    android:gravity="center_horizontal"
+                    android:text="@string/login_contact_header"
+                    android:textSize="14sp"
+                    app:fontFamily="sans-serif-medium" />
+
+                <LinearLayout
+                    android:id="@+id/loginSymbolContactButtons"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginLeft="16dp"
+                    android:layout_marginRight="16dp"
+                    android:orientation="horizontal">
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/loginSymbolContactEmail"
+                        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_marginEnd="8dp"
+                        android:layout_marginRight="8dp"
+                        android:layout_weight="1"
+                        android:text="@string/login_contact_email"
+                        app:icon="@drawable/ic_more_messages" />
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/loginSymbolFaq"
+                        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="8dp"
+                        android:layout_marginLeft="8dp"
+                        android:layout_weight="1"
+                        android:text="@string/about_faq"
+                        app:icon="@drawable/ic_about_faq" />
+                </LinearLayout>
+
+                <View
+                    android:id="@+id/loginSymbolContactBottomDivider"
+                    android:layout_width="match_parent"
+                    android:layout_height="1dp"
+                    android:layout_marginTop="8dp"
+                    android:background="?android:attr/listDivider" />
+            </LinearLayout>
+
             <TextView
                 android:id="@+id/loginSymbolHeader"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginStart="32dp"
-                android:layout_marginLeft="32dp"
-                android:layout_marginTop="48dp"
+                android:layout_marginTop="32dp"
                 android:layout_marginEnd="32dp"
                 android:layout_marginRight="32dp"
                 android:gravity="center_horizontal"
@@ -40,7 +112,7 @@
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintHorizontal_bias="0.5"
                 app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintTop_toTopOf="parent"
+                app:layout_constraintTop_toBottomOf="@+id/loginSymbolContact"
                 app:layout_constraintVertical_chainStyle="packed" />
 
             <com.google.android.material.textfield.TextInputLayout
@@ -62,37 +134,30 @@
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@+id/loginSymbolHeader">
 
-                <androidx.appcompat.widget.AppCompatAutoCompleteTextView
+                <AutoCompleteTextView
                     android:id="@+id/loginSymbolName"
                     style="@style/Widget.MaterialComponents.TextInputEditText.OutlinedBox"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:imeActionLabel="@string/login_sign_in"
                     android:imeOptions="actionDone"
-                    android:inputType="textAutoComplete"
+                    android:inputType="textAutoComplete|textNoSuggestions"
                     android:maxLines="1"
                     tools:ignore="LabelFor" />
             </com.google.android.material.textfield.TextInputLayout>
 
             <com.google.android.material.button.MaterialButton
                 android:id="@+id/loginSymbolSignIn"
-                style="@style/Widget.MaterialComponents.Button"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_gravity="center_vertical"
                 android:layout_marginTop="48dp"
                 android:layout_marginEnd="24dp"
                 android:layout_marginRight="24dp"
-                android:layout_marginBottom="48dp"
+                android:layout_marginBottom="16dp"
                 android:text="@string/login_sign_in"
-                android:textAppearance="?android:textAppearanceSmall"
-                android:textColor="@android:color/white"
-                android:textStyle="bold"
-                app:backgroundTint="@color/colorPrimary"
                 app:layout_constraintBottom_toBottomOf="parent"
                 app:layout_constraintEnd_toEndOf="parent"
-                app:layout_constraintTop_toBottomOf="@+id/loginSymbolNameLayout"
-                app:layout_constraintVertical_bias="1" />
+                app:layout_constraintTop_toBottomOf="@+id/loginSymbolNameLayout" />
         </androidx.constraintlayout.widget.ConstraintLayout>
     </androidx.core.widget.NestedScrollView>
 </FrameLayout>
diff --git a/app/src/main/res/layout/fragment_lucky_number.xml b/app/src/main/res/layout/fragment_lucky_number.xml
index b881f1bda..a6b9b8221 100644
--- a/app/src/main/res/layout/fragment_lucky_number.xml
+++ b/app/src/main/res/layout/fragment_lucky_number.xml
@@ -5,8 +5,9 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <ProgressBar
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/luckyNumberProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
@@ -38,9 +39,7 @@
                 android:layout_height="wrap_content"
                 android:textSize="52sp"
                 tools:text="14" />
-
         </LinearLayout>
-
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
     <LinearLayout
@@ -50,15 +49,15 @@
         android:gravity="center"
         android:orientation="vertical"
         android:padding="10dp"
-        android:visibility="gone">
+        android:visibility="gone"
+        tools:ignore="UseCompoundDrawables">
 
-        <androidx.appcompat.widget.AppCompatImageView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:minWidth="100dp"
-            android:minHeight="100dp"
-            app:srcCompat="@drawable/ic_more_lucky_number_24dp"
-            app:tint="?android:attr/textColorPrimary" />
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_more_lucky_number"
+            app:tint="?colorOnBackground"
+            tools:ignore="ContentDescription" />
 
         <TextView
             android:layout_width="wrap_content"
@@ -67,7 +66,56 @@
             android:gravity="center"
             android:text="@string/lucky_number_empty"
             android:textSize="20sp" />
-
     </LinearLayout>
 
+    <LinearLayout
+        android:id="@+id/luckyNumberError"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables"
+        tools:visibility="invisible">
+
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_error"
+            app:tint="?colorOnBackground"
+            tools:ignore="contentDescription" />
+
+        <TextView
+            android:id="@+id/luckyNumberErrorMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:padding="8dp"
+            android:text="@string/error_unknown"
+            android:textSize="20sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center"
+            android:orientation="horizontal">
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/luckyNumberErrorDetails"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:text="@string/all_details" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/luckyNumberErrorRetry"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/all_retry" />
+        </LinearLayout>
+    </LinearLayout>
 </androidx.coordinatorlayout.widget.CoordinatorLayout>
diff --git a/app/src/main/res/layout/fragment_message.xml b/app/src/main/res/layout/fragment_message.xml
index 78edbb037..b4cc0c2fe 100644
--- a/app/src/main/res/layout/fragment_message.xml
+++ b/app/src/main/res/layout/fragment_message.xml
@@ -1,21 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <com.google.android.material.tabs.TabLayout
+    <io.github.wulkanowy.ui.widgets.MaterialTabLayout
         android:id="@+id/messageTabLayout"
         android:layout_width="match_parent"
         android:layout_height="48dp"
-        android:background="@color/colorPrimary"
-        android:elevation="5dp"
+        android:background="?colorSurface"
         android:visibility="invisible"
         app:tabGravity="fill"
-        app:tabIndicatorColor="@android:color/white"
+        app:tabIndicatorColor="?colorPrimary"
         app:tabMaxWidth="0dp"
         app:tabMode="fixed"
-        app:tabTextColor="@android:color/white" />
+        app:tabSelectedTextColor="?colorPrimary"
+        app:tabTextColor="@color/material_on_surface_emphasis_medium"
+        tools:ignore="UnusedAttribute"
+        tools:visibility="visible" />
 
     <androidx.viewpager.widget.ViewPager
         android:id="@+id/messageViewPager"
@@ -24,7 +27,7 @@
         android:layout_marginTop="48dp"
         android:visibility="invisible" />
 
-    <com.google.android.material.floatingactionbutton.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
         android:id="@+id/openSendMessageButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -32,14 +35,15 @@
         android:layout_margin="16dp"
         android:clickable="true"
         android:focusable="true"
-        android:tint="#FFFFFF"
-        app:srcCompat="@drawable/ic_send_message_24dp" />
+        android:text="@string/send_message_title"
+        android:tint="?colorOnSecondary"
+        app:icon="@drawable/ic_menu_message_write" />
 
-    <ProgressBar
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/messageProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
         android:indeterminate="true" />
-
 </androidx.coordinatorlayout.widget.CoordinatorLayout>
diff --git a/app/src/main/res/layout/fragment_message_preview.xml b/app/src/main/res/layout/fragment_message_preview.xml
index 7150c03aa..4a6f7e9a7 100644
--- a/app/src/main/res/layout/fragment_message_preview.xml
+++ b/app/src/main/res/layout/fragment_message_preview.xml
@@ -10,6 +10,7 @@
         android:layout_height="match_parent">
 
         <LinearLayout
+            android:id="@+id/messagePreviewContentContainer"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:orientation="vertical"
@@ -29,7 +30,7 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_marginBottom="4dp"
-                android:textColor="?android:attr/textColorSecondary"
+                android:textColor="?android:textColorSecondary"
                 android:textSize="15sp"
                 tools:text="@tools:sample/full_names" />
 
@@ -38,7 +39,7 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_marginBottom="15dp"
-                android:textColor="?android:attr/textColorSecondary"
+                android:textColor="?android:textColorSecondary"
                 android:textSize="15sp"
                 tools:text="@tools:sample/date/ddmmyy" />
 
@@ -53,35 +54,61 @@
         </LinearLayout>
     </androidx.core.widget.NestedScrollView>
 
+
     <LinearLayout
         android:id="@+id/messagePreviewError"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:gravity="center"
         android:orientation="vertical"
-        android:padding="10dp"
-        android:visibility="invisible">
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables"
+        tools:visibility="invisible">
 
-        <androidx.appcompat.widget.AppCompatImageView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:minWidth="100dp"
-            android:minHeight="100dp"
-            app:srcCompat="@drawable/ic_more_messages_24dp"
-            app:tint="?android:attr/textColorPrimary"
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_error"
+            app:tint="?colorOnBackground"
             tools:ignore="contentDescription" />
 
         <TextView
+            android:id="@+id/messagePreviewErrorMessage"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginTop="20dp"
             android:gravity="center"
-            android:text="@string/message_preview_error"
+            android:padding="8dp"
+            android:text="@string/error_unknown"
             android:textSize="20sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center"
+            android:orientation="horizontal">
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/messagePreviewErrorDetails"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:text="@string/all_details" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/messagePreviewErrorRetry"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/all_retry" />
+        </LinearLayout>
     </LinearLayout>
 
-    <ProgressBar
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/messagePreviewProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
diff --git a/app/src/main/res/layout/fragment_message_tab.xml b/app/src/main/res/layout/fragment_message_tab.xml
index 31f1c8aa4..e83d913e9 100644
--- a/app/src/main/res/layout/fragment_message_tab.xml
+++ b/app/src/main/res/layout/fragment_message_tab.xml
@@ -12,11 +12,13 @@
         <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/messageTabRecycler"
             android:layout_width="match_parent"
-            android:layout_height="match_parent" />
+            android:layout_height="match_parent"
+            tools:listitem="@layout/item_message" />
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
-    <ProgressBar
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/messageTabProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
@@ -28,15 +30,14 @@
         android:layout_height="match_parent"
         android:gravity="center"
         android:orientation="vertical"
-        android:visibility="invisible">
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables">
 
-        <androidx.appcompat.widget.AppCompatImageView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:minWidth="100dp"
-            android:minHeight="100dp"
-            app:srcCompat="@drawable/ic_more_messages_24dp"
-            app:tint="?android:attr/textColorPrimary"
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_more_messages"
+            app:tint="?colorOnBackground"
             tools:ignore="contentDescription" />
 
         <TextView
@@ -47,4 +48,55 @@
             android:text="@string/message_no_items"
             android:textSize="20sp" />
     </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/messageTabError"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables"
+        tools:visibility="invisible">
+
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_error"
+            app:tint="?colorOnBackground"
+            tools:ignore="contentDescription" />
+
+        <TextView
+            android:id="@+id/messageTabErrorMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:padding="8dp"
+            android:text="@string/error_unknown"
+            android:textSize="20sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center"
+            android:orientation="horizontal">
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/messageTabErrorDetails"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:text="@string/all_details" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/messageTabErrorRetry"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/all_retry" />
+        </LinearLayout>
+    </LinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/fragment_mobile_device.xml b/app/src/main/res/layout/fragment_mobile_device.xml
new file mode 100644
index 000000000..cf11c2831
--- /dev/null
+++ b/app/src/main/res/layout/fragment_mobile_device.xml
@@ -0,0 +1,116 @@
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ui.modules.mobiledevice.MobileDeviceFragment">
+
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
+        android:id="@+id/mobileDevicesProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:indeterminate="true"
+        tools:visibility="invisible" />
+
+    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+        android:id="@+id/mobileDevicesSwipe"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/mobileDevicesRecycler"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            tools:listitem="@layout/item_mobile_device" />
+    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
+
+    <LinearLayout
+        android:id="@+id/mobileDevicesEmpty"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:padding="10dp"
+        android:visibility="gone"
+        tools:ignore="UseCompoundDrawables">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:text="@string/mobile_devices_no_items"
+            android:textSize="20sp" />
+
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:minWidth="100dp"
+            android:minHeight="100dp"
+            app:srcCompat="@drawable/ic_more_mobile_devices"
+            app:tint="?android:attr/textColorPrimary"
+            tools:ignore="contentDescription" />
+    </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/mobileDevicesError"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables"
+        tools:visibility="invisible">
+
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_error"
+            app:tint="?colorOnBackground"
+            tools:ignore="contentDescription" />
+
+        <TextView
+            android:id="@+id/mobileDevicesErrorMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:padding="8dp"
+            android:text="@string/error_unknown"
+            android:textSize="20sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center"
+            android:orientation="horizontal">
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/mobileDevicesErrorDetails"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:text="@string/all_details" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/mobileDevicesErrorRetry"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/all_retry" />
+        </LinearLayout>
+    </LinearLayout>
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/mobileDeviceAddButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_margin="16dp"
+        android:tint="?colorOnSecondary"
+        app:srcCompat="@drawable/ic_all_add" />
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
diff --git a/app/src/main/res/layout/fragment_note.xml b/app/src/main/res/layout/fragment_note.xml
index bc70682f6..e55f0007f 100644
--- a/app/src/main/res/layout/fragment_note.xml
+++ b/app/src/main/res/layout/fragment_note.xml
@@ -4,8 +4,9 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <ProgressBar
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/noteProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
@@ -29,15 +30,14 @@
         android:gravity="center"
         android:orientation="vertical"
         android:padding="10dp"
-        android:visibility="gone">
+        android:visibility="gone"
+        tools:ignore="UseCompoundDrawables">
 
-        <androidx.appcompat.widget.AppCompatImageView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:minWidth="100dp"
-            android:minHeight="100dp"
-            app:srcCompat="@drawable/ic_menu_main_note_24dp"
-            app:tint="?android:attr/textColorPrimary"
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_more_note"
+            app:tint="?colorOnBackground"
             tools:ignore="contentDescription" />
 
         <TextView
@@ -48,4 +48,55 @@
             android:text="@string/note_no_items"
             android:textSize="20sp" />
     </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/noteError"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables"
+        tools:visibility="invisible">
+
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_error"
+            app:tint="?colorOnBackground"
+            tools:ignore="contentDescription" />
+
+        <TextView
+            android:id="@+id/noteErrorMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:padding="8dp"
+            android:text="@string/error_unknown"
+            android:textSize="20sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center"
+            android:orientation="horizontal">
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/noteErrorDetails"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:text="@string/all_details" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/noteErrorRetry"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/all_retry" />
+        </LinearLayout>
+    </LinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/fragment_school.xml b/app/src/main/res/layout/fragment_school.xml
new file mode 100644
index 000000000..a7e9a213b
--- /dev/null
+++ b/app/src/main/res/layout/fragment_school.xml
@@ -0,0 +1,286 @@
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ui.modules.schoolandteachers.school.SchoolFragment">
+
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
+        android:id="@+id/schoolProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:indeterminate="true" />
+
+    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+        android:id="@+id/schoolSwipe"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:paddingStart="8dp"
+        android:paddingLeft="8dp"
+        android:paddingTop="8dp"
+        android:paddingEnd="12dp"
+        android:paddingRight="12dp"
+        android:paddingBottom="8dp">
+
+        <LinearLayout
+            android:id="@+id/schoolContent"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:orientation="vertical">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:paddingStart="12dp"
+                android:paddingLeft="12dp"
+                android:paddingTop="8dp"
+                android:paddingEnd="12dp"
+                android:paddingRight="12dp"
+                android:paddingBottom="8dp">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:text="@string/school_name"
+                    android:textColor="?android:textColorSecondary"
+                    android:textSize="12sp" />
+
+                <TextView
+                    android:id="@+id/schoolName"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:textIsSelectable="true"
+                    android:textSize="17sp"
+                    tools:text="@tools:sample/full_names" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal">
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:orientation="vertical"
+                    android:paddingStart="12dp"
+                    android:paddingLeft="12dp"
+                    android:paddingTop="7dp"
+                    android:paddingEnd="12dp"
+                    android:paddingRight="12dp"
+                    android:paddingBottom="7dp">
+
+                    <TextView
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:text="@string/school_address"
+                        android:textColor="?android:textColorSecondary"
+                        android:textSize="12sp" />
+
+                    <TextView
+                        android:id="@+id/schoolAddress"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:textIsSelectable="true"
+                        android:textSize="17sp"
+                        tools:text="@tools:sample/full_names" />
+                </LinearLayout>
+
+                <ImageButton
+                    android:id="@+id/schoolAddressButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    app:srcCompat="@drawable/ic_school_directions"
+                    android:contentDescription="@string/school_address_button"
+                    android:background="?attr/selectableItemBackgroundBorderless"
+                    android:tint="?colorPrimary"
+                    android:padding="4dp"
+                    android:layout_marginTop="8dp"
+                    android:layout_marginRight="8dp"
+                    android:layout_marginLeft="8dp"
+                    android:layout_gravity="center_vertical" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal">
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:orientation="vertical"
+                    android:paddingStart="12dp"
+                    android:paddingLeft="12dp"
+                    android:paddingTop="7dp"
+                    android:paddingEnd="12dp"
+                    android:paddingRight="12dp"
+                    android:paddingBottom="7dp">
+
+                    <TextView
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:text="@string/school_telephone"
+                        android:textColor="?android:textColorSecondary"
+                        android:textSize="12sp" />
+
+                    <TextView
+                        android:id="@+id/schoolTelephone"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:textIsSelectable="true"
+                        android:textSize="17sp"
+                        tools:text="@tools:sample/full_names" />
+                </LinearLayout>
+
+                <ImageButton
+                    android:id="@+id/schoolTelephoneButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    app:srcCompat="@drawable/ic_school_phone"
+                    android:contentDescription="@string/school_telephone_button"
+                    android:background="?attr/selectableItemBackgroundBorderless"
+                    android:tint="?colorPrimary"
+                    android:padding="4dp"
+                    android:layout_marginTop="8dp"
+                    android:layout_marginRight="8dp"
+                    android:layout_marginLeft="8dp"
+                    android:layout_gravity="center_vertical" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:paddingStart="12dp"
+                android:paddingLeft="12dp"
+                android:paddingTop="7dp"
+                android:paddingEnd="12dp"
+                android:paddingRight="12dp"
+                android:paddingBottom="7dp">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:text="@string/school_headmaster"
+                    android:textColor="?android:textColorSecondary"
+                    android:textSize="12sp" />
+
+                <TextView
+                    android:id="@+id/schoolHeadmaster"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:textIsSelectable="true"
+                    android:textSize="17sp"
+                    tools:text="@tools:sample/full_names" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:paddingStart="12dp"
+                android:paddingLeft="12dp"
+                android:paddingTop="7dp"
+                android:paddingEnd="12dp"
+                android:paddingRight="12dp"
+                android:paddingBottom="7dp">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:text="@string/school_pedagogue"
+                    android:textColor="?android:textColorSecondary"
+                    android:textSize="12sp" />
+
+                <TextView
+                    android:id="@+id/schoolPedagogue"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:textIsSelectable="true"
+                    android:textSize="17sp"
+                    tools:text="@tools:sample/full_names" />
+            </LinearLayout>
+        </LinearLayout>
+    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
+
+    <LinearLayout
+        android:id="@+id/schoolEmpty"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:padding="10dp"
+        android:visibility="gone"
+        tools:ignore="UseCompoundDrawables">
+
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_more_schoolandteachers"
+            app:tint="?colorOnBackground"
+            tools:ignore="contentDescription" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:text="@string/school_no_info"
+            android:textSize="20sp" />
+    </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/schoolError"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables"
+        tools:visibility="invisible">
+
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_error"
+            app:tint="?colorOnBackground"
+            tools:ignore="contentDescription" />
+
+        <TextView
+            android:id="@+id/schoolErrorMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:padding="8dp"
+            android:text="@string/error_unknown"
+            android:textSize="20sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center"
+            android:orientation="horizontal">
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/schoolErrorDetails"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:text="@string/all_details" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/schoolErrorRetry"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/all_retry" />
+        </LinearLayout>
+    </LinearLayout>
+</FrameLayout>
diff --git a/app/src/main/res/layout/fragment_schoolandteachers.xml b/app/src/main/res/layout/fragment_schoolandteachers.xml
new file mode 100644
index 000000000..6414abb92
--- /dev/null
+++ b/app/src/main/res/layout/fragment_schoolandteachers.xml
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <io.github.wulkanowy.ui.widgets.MaterialTabLayout
+        android:id="@+id/schoolandteachersTabLayout"
+        android:layout_width="match_parent"
+        android:layout_height="48dp"
+        android:background="?colorSurface"
+        android:visibility="invisible"
+        app:tabGravity="fill"
+        app:tabIndicatorColor="?colorPrimary"
+        app:tabMaxWidth="0dp"
+        app:tabMode="fixed"
+        app:tabSelectedTextColor="?colorPrimary"
+        app:tabTextColor="@color/material_on_surface_emphasis_medium"
+        tools:ignore="UnusedAttribute"
+        tools:visibility="visible" />
+
+    <androidx.viewpager.widget.ViewPager
+        android:id="@+id/schoolandteachersViewPager"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_marginTop="48dp"
+        android:visibility="invisible" />
+
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
+        android:id="@+id/schoolandteachersProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:indeterminate="true" />
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
+
diff --git a/app/src/main/res/layout/fragment_teacher.xml b/app/src/main/res/layout/fragment_teacher.xml
new file mode 100644
index 000000000..484bf0651
--- /dev/null
+++ b/app/src/main/res/layout/fragment_teacher.xml
@@ -0,0 +1,103 @@
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
+        android:id="@+id/teacherProgress"
+        style="@style/Widget.MaterialProgressBar.ProgressBar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:indeterminate="true" />
+
+    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+        android:id="@+id/teacherSwipe"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <androidx.recyclerview.widget.RecyclerView
+            tools:listitem="@layout/item_teacher"
+            android:id="@+id/teacherRecycler"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" />
+    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
+
+    <LinearLayout
+        android:id="@+id/teacherEmpty"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:padding="10dp"
+        android:visibility="gone"
+        tools:ignore="UseCompoundDrawables">
+
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_more_schoolandteachers"
+            app:tint="?colorOnBackground"
+            tools:ignore="contentDescription" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:text="@string/teacher_no_items"
+            android:textSize="20sp" />
+    </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/teacherError"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="invisible"
+        tools:ignore="UseCompoundDrawables"
+        tools:visibility="invisible">
+
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            app:srcCompat="@drawable/ic_error"
+            app:tint="?colorOnBackground"
+            tools:ignore="contentDescription" />
+
+        <TextView
+            android:id="@+id/teacherErrorMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:padding="8dp"
+            android:text="@string/error_unknown"
+            android:textSize="20sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center"
+            android:orientation="horizontal">
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/teacherErrorDetails"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="8dp"
+                android:layout_marginRight="8dp"
+                android:text="@string/all_details" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/teacherErrorRetry"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/all_retry" />
+        </LinearLayout>
+    </LinearLayout>
+</FrameLayout>
diff --git a/app/src/main/res/layout/fragment_timetable.xml b/app/src/main/res/layout/fragment_timetable.xml
index 72621b2f5..98ccabbff 100644
--- a/app/src/main/res/layout/fragment_timetable.xml
+++ b/app/src/main/res/layout/fragment_timetable.xml
@@ -2,15 +2,17 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    tools:context=".ui.modules.timetable.TimetableFragment">
 
     <androidx.coordinatorlayout.widget.CoordinatorLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_marginBottom="50dp">
 
-        <ProgressBar
+        <me.zhanghai.android.materialprogressbar.MaterialProgressBar
             android:id="@+id/timetableProgress"
+            style="@style/Widget.MaterialProgressBar.ProgressBar"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
@@ -24,7 +26,8 @@
             <androidx.recyclerview.widget.RecyclerView
                 android:id="@+id/timetableRecycler"
                 android:layout_width="match_parent"
-                android:layout_height="match_parent" />
+                android:layout_height="match_parent"
+                tools:listitem="@layout/item_timetable" />
         </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
         <LinearLayout
@@ -34,15 +37,14 @@
             android:gravity="center"
             android:orientation="vertical"
             android:padding="10dp"
-            android:visibility="gone">
+            android:visibility="gone"
+            tools:ignore="UseCompoundDrawables">
 
-            <androidx.appcompat.widget.AppCompatImageView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:minWidth="100dp"
-                android:minHeight="100dp"
-                app:srcCompat="@drawable/ic_menu_main_timetable_24dp"
-                app:tint="?android:attr/textColorPrimary"
+            <ImageView
+                android:layout_width="100dp"
+                android:layout_height="100dp"
+                app:srcCompat="@drawable/ic_main_timetable"
+                app:tint="?colorOnBackground"
                 tools:ignore="contentDescription" />
 
             <TextView
@@ -53,44 +55,106 @@
                 android:text="@string/timetable_no_items"
                 android:textSize="20sp" />
         </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/timetableError"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:visibility="invisible"
+            tools:ignore="UseCompoundDrawables"
+            tools:visibility="invisible">
+
+            <ImageView
+                android:layout_width="100dp"
+                android:layout_height="100dp"
+                app:srcCompat="@drawable/ic_error"
+                app:tint="?colorOnBackground"
+                tools:ignore="contentDescription" />
+
+            <TextView
+                android:id="@+id/timetableErrorMessage"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="20dp"
+                android:gravity="center"
+                android:padding="8dp"
+                android:text="@string/error_unknown"
+                android:textSize="20sp" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="16dp"
+                android:gravity="center"
+                android:orientation="horizontal">
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/timetableErrorDetails"
+                    style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="8dp"
+                    android:layout_marginRight="8dp"
+                    android:text="@string/all_details" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/timetableErrorRetry"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/all_retry" />
+            </LinearLayout>
+        </LinearLayout>
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
 
-    <LinearLayout
+    <io.github.wulkanowy.ui.widgets.MaterialLinearLayout
+        android:id="@+id/timetableNavContainer"
         android:layout_width="match_parent"
-        android:layout_height="50dp"
+        android:layout_height="48dp"
         android:layout_gravity="bottom"
-        android:background="?android:attr/windowBackground"
-        android:elevation="10dp"
-        android:orientation="horizontal">
+        android:gravity="center"
+        android:orientation="horizontal"
+        tools:ignore="UnusedAttribute">
 
-        <Button
+        <ImageButton
             android:id="@+id/timetablePreviousButton"
-            style="@style/Widget.AppCompat.Button.Borderless"
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:drawablePadding="4dp"
-            android:gravity="start|center"
-            android:text="@string/all_prev"
-            android:textAlignment="gravity" />
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/all_prev"
+            android:paddingLeft="12dp"
+            android:paddingTop="8dp"
+            android:paddingRight="12dp"
+            android:paddingBottom="8dp"
+            android:scaleType="fitStart"
+            android:tint="?colorPrimary"
+            app:srcCompat="@drawable/ic_chevron_left" />
 
         <TextView
             android:id="@+id/timetableNavDate"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
+            android:background="?selectableItemBackgroundBorderless"
+            android:fontFamily="sans-serif"
             android:gravity="center"
-            android:text="@string/app_name" />
+            android:text="@string/app_name"
+            android:textSize="16sp" />
 
-        <Button
+        <ImageButton
             android:id="@+id/timetableNextButton"
-            style="@style/Widget.AppCompat.Button.Borderless"
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_gravity="end"
             android:layout_weight="1"
-            android:drawablePadding="4dp"
-            android:gravity="end|center"
-            android:text="@string/all_next"
-            android:textAlignment="gravity" />
-    </LinearLayout>
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/all_next"
+            android:paddingLeft="12dp"
+            android:paddingTop="8dp"
+            android:paddingRight="12dp"
+            android:paddingBottom="8dp"
+            android:scaleType="fitEnd"
+            android:tint="?colorPrimary"
+            app:srcCompat="@drawable/ic_chevron_right" />
+    </io.github.wulkanowy.ui.widgets.MaterialLinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/fragment_timetable_completed.xml b/app/src/main/res/layout/fragment_timetable_completed.xml
index 381ae36c0..110670449 100644
--- a/app/src/main/res/layout/fragment_timetable_completed.xml
+++ b/app/src/main/res/layout/fragment_timetable_completed.xml
@@ -10,8 +10,9 @@
         android:layout_height="match_parent"
         android:layout_marginBottom="50dp">
 
-        <ProgressBar
+        <me.zhanghai.android.materialprogressbar.MaterialProgressBar
             android:id="@+id/completedLessonsProgress"
+            style="@style/Widget.MaterialProgressBar.ProgressBar"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
@@ -38,12 +39,12 @@
             android:visibility="gone">
 
             <androidx.appcompat.widget.AppCompatImageView
+                android:id="@+id/completedLessonsInfoImage"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:minWidth="100dp"
                 android:minHeight="100dp"
-                android:id="@+id/completedLessonsInfoImage"
-                app:srcCompat="@drawable/ic_menu_main_lessons_completed_24dp"
+                app:srcCompat="@drawable/ic_menu_timetable_lessons_completed"
                 app:tint="?android:attr/textColorPrimary"
                 tools:ignore="contentDescription" />
 
@@ -56,44 +57,106 @@
                 android:text="@string/completed_lessons_no_items"
                 android:textSize="20sp" />
         </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/completedLessonError"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:visibility="invisible"
+            tools:ignore="UseCompoundDrawables"
+            tools:visibility="invisible">
+
+            <ImageView
+                android:layout_width="100dp"
+                android:layout_height="100dp"
+                app:srcCompat="@drawable/ic_error"
+                app:tint="?colorOnBackground"
+                tools:ignore="contentDescription" />
+
+            <TextView
+                android:id="@+id/completedLessonErrorMessage"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="20dp"
+                android:gravity="center"
+                android:padding="8dp"
+                android:text="@string/error_unknown"
+                android:textSize="20sp" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="16dp"
+                android:gravity="center"
+                android:orientation="horizontal">
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/completedLessonErrorDetails"
+                    style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="8dp"
+                    android:layout_marginRight="8dp"
+                    android:text="@string/all_details" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/completedLessonErrorRetry"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/all_retry" />
+            </LinearLayout>
+        </LinearLayout>
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
 
-    <LinearLayout
+    <io.github.wulkanowy.ui.widgets.MaterialLinearLayout
+        android:id="@+id/completedLessonsNavContainer"
         android:layout_width="match_parent"
-        android:layout_height="50dp"
+        android:layout_height="48dp"
         android:layout_gravity="bottom"
-        android:background="?android:attr/windowBackground"
-        android:elevation="10dp"
-        android:orientation="horizontal">
+        android:orientation="horizontal"
+        android:gravity="center"
+        tools:ignore="UnusedAttribute">
 
-        <Button
+        <ImageButton
             android:id="@+id/completedLessonsPreviousButton"
-            style="@style/Widget.AppCompat.Button.Borderless"
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:drawablePadding="4dp"
-            android:gravity="start|center"
-            android:text="@string/all_prev"
-            android:textAlignment="gravity" />
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:paddingLeft="12dp"
+            android:paddingTop="8dp"
+            android:paddingRight="12dp"
+            android:paddingBottom="8dp"
+            android:scaleType="fitStart"
+            android:tint="?colorPrimary"
+            app:srcCompat="@drawable/ic_chevron_left"
+            android:contentDescription="@string/all_prev"/>
 
         <TextView
             android:id="@+id/completedLessonsNavDate"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
+            android:fontFamily="sans-serif"
+            android:background="?selectableItemBackgroundBorderless"
             android:gravity="center"
-            android:text="@string/app_name" />
+            android:text="@string/app_name"
+            android:textSize="16sp" />
 
-        <Button
+        <ImageButton
             android:id="@+id/completedLessonsNextButton"
-            style="@style/Widget.AppCompat.Button.Borderless"
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_gravity="end"
             android:layout_weight="1"
-            android:drawablePadding="4dp"
-            android:gravity="end|center"
-            android:text="@string/all_next"
-            android:textAlignment="gravity" />
-    </LinearLayout>
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:paddingLeft="12dp"
+            android:paddingTop="8dp"
+            android:paddingRight="12dp"
+            android:paddingBottom="8dp"
+            android:scaleType="fitEnd"
+            android:tint="?colorPrimary"
+            app:srcCompat="@drawable/ic_chevron_right"
+            android:contentDescription="@string/all_next" />
+    </io.github.wulkanowy.ui.widgets.MaterialLinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/header_exam.xml b/app/src/main/res/layout/header_exam.xml
index e5b5af3d7..3a2e38c59 100644
--- a/app/src/main/res/layout/header_exam.xml
+++ b/app/src/main/res/layout/header_exam.xml
@@ -17,8 +17,8 @@
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_weight="1"
-        android:text="@string/app_name"
-        android:textSize="18sp" />
+        android:textSize="18sp"
+        tools:text="Monday" />
 
     <TextView
         android:id="@+id/examHeaderDate"
@@ -27,7 +27,6 @@
         android:layout_marginStart="10dp"
         android:layout_marginLeft="10dp"
         android:gravity="end"
-        android:text="@string/app_name"
-        android:textSize="13sp" />
-
+        android:textSize="13sp"
+        tools:text="25.01.2020" />
 </LinearLayout>
diff --git a/app/src/main/res/layout/header_grade_details.xml b/app/src/main/res/layout/header_grade_details.xml
index 75e8388a9..0fa3872e1 100644
--- a/app/src/main/res/layout/header_grade_details.xml
+++ b/app/src/main/res/layout/header_grade_details.xml
@@ -4,12 +4,14 @@
     android:id="@+id/gradeHeaderContainer"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:background="?attr/selectableItemBackground"
+    android:background="?selectableItemBackground"
     android:paddingLeft="16dp"
     android:paddingTop="10dp"
-    android:paddingRight="16dp"
+    android:paddingRight="14dp"
     android:paddingBottom="10dp"
-    tools:context=".ui.modules.grade.details.GradeDetailsHeader">
+    tools:context=".ui.modules.grade.details.GradeDetailsHeader"
+    android:paddingEnd="12dp"
+    android:paddingStart="16dp">
 
     <TextView
         android:id="@+id/gradeHeaderSubject"
@@ -21,8 +23,8 @@
         android:layout_toLeftOf="@id/gradeHeaderNote"
         android:ellipsize="end"
         android:maxLines="1"
-        android:text="@string/app_name"
-        android:textSize="15sp" />
+        android:textSize="15sp"
+        tools:text="Fizyka" />
 
     <TextView
         android:id="@+id/gradeHeaderAverage"
@@ -30,9 +32,9 @@
         android:layout_height="wrap_content"
         android:layout_below="@+id/gradeHeaderSubject"
         android:layout_marginTop="5dp"
-        android:text="@string/app_name"
-        android:textColor="?android:attr/android:textColorSecondary"
-        android:textSize="12sp" />
+        android:textColor="?android:textColorSecondary"
+        android:textSize="12sp"
+        tools:text="Average: 6,00" />
 
     <TextView
         android:id="@+id/gradeHeaderNumber"
@@ -44,17 +46,23 @@
         android:layout_marginTop="5dp"
         android:layout_toEndOf="@+id/gradeHeaderAverage"
         android:layout_toRightOf="@+id/gradeHeaderAverage"
-        android:text="@string/app_name"
-        android:textColor="?android:attr/android:textColorSecondary"
-        android:textSize="12sp" />
+        android:textColor="?android:textColorSecondary"
+        android:textSize="12sp"
+        tools:text="12 grades" />
 
-    <ImageView
+    <TextView
         android:id="@+id/gradeHeaderNote"
         android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
+        android:minWidth="20dp"
+        android:layout_height="20dp"
+        android:paddingLeft="5dp"
+        android:paddingRight="5dp"
         android:layout_alignParentEnd="true"
         android:layout_alignParentRight="true"
+        android:gravity="center"
         android:layout_marginTop="10dp"
-        app:srcCompat="@drawable/ic_all_round_note_24dp"
-        tools:ignore="contentDescription" />
+        android:background="@drawable/background_header_note"
+        android:textColor="?colorOnPrimary"
+        android:textSize="14sp"
+        tools:text="255" />
 </RelativeLayout>
diff --git a/app/src/main/res/layout/header_homework.xml b/app/src/main/res/layout/header_homework.xml
index 526e8150a..207fcdb40 100644
--- a/app/src/main/res/layout/header_homework.xml
+++ b/app/src/main/res/layout/header_homework.xml
@@ -18,7 +18,7 @@
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:textSize="18sp"
-        tools:text="@tools:sample/date/day_of_week" />
+        tools:text="Monday" />
 
     <TextView
         android:id="@+id/homeworkHeaderDate"
@@ -28,6 +28,5 @@
         android:layout_marginLeft="10dp"
         android:gravity="end"
         android:textSize="13sp"
-        tools:text="@tools:sample/date/ddmmyy" />
-
+        tools:text="22.02.2022" />
 </LinearLayout>
diff --git a/app/src/main/res/layout/item_about.xml b/app/src/main/res/layout/item_about.xml
new file mode 100644
index 000000000..b5dc3758c
--- /dev/null
+++ b/app/src/main/res/layout/item_about.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="72dp"
+    android:background="?selectableItemBackground">
+
+    <ImageView
+        android:id="@+id/aboutItemImage"
+        android:layout_width="24dp"
+        android:layout_height="24dp"
+        android:layout_marginStart="16dp"
+        android:layout_marginLeft="16dp"
+        android:layout_marginTop="16dp"
+        android:layout_marginEnd="32dp"
+        android:layout_marginRight="32dp"
+        app:tint="?colorOnBackground"
+        tools:ignore="ContentDescription"
+        tools:src="@drawable/ic_all_about" />
+
+    <TextView
+        android:id="@+id/aboutItemTitle"
+        android:layout_width="wrap_content"
+        android:layout_height="32dp"
+        android:layout_marginEnd="16dp"
+        android:layout_marginRight="16dp"
+        android:layout_toEndOf="@id/aboutItemImage"
+        android:layout_toRightOf="@id/aboutItemImage"
+        android:ellipsize="end"
+        android:gravity="bottom"
+        android:maxLines="1"
+        android:textSize="16sp"
+        tools:text="@tools:sample/lorem" />
+
+    <TextView
+        android:id="@+id/aboutItemSummary"
+        android:layout_width="wrap_content"
+        android:layout_height="20dp"
+        android:layout_below="@id/aboutItemTitle"
+        android:layout_marginEnd="16dp"
+        android:layout_marginRight="16dp"
+        android:layout_toEndOf="@id/aboutItemImage"
+        android:layout_toRightOf="@id/aboutItemImage"
+        android:ellipsize="end"
+        android:gravity="bottom"
+        android:maxLines="1"
+        android:textColor="?android:textColorSecondary"
+        android:textSize="14sp"
+        tools:text="@tools:sample/lorem" />
+</RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/item_account.xml b/app/src/main/res/layout/item_account.xml
index 56f553e54..309be8121 100644
--- a/app/src/main/res/layout/item_account.xml
+++ b/app/src/main/res/layout/item_account.xml
@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="56dp"
-    android:background="?attr/selectableItemBackground"
+    android:background="?selectableItemBackground"
     android:orientation="horizontal"
     android:paddingStart="24dp"
     android:paddingLeft="24dp"
@@ -12,16 +12,16 @@
     android:paddingRight="24dp"
     tools:context=".ui.modules.account.AccountItem">
 
-    <androidx.appcompat.widget.AppCompatImageView
+    <ImageView
         android:id="@+id/accountItemImage"
         android:layout_width="40dp"
         android:layout_height="40dp"
         android:layout_centerVertical="true"
-        android:background="@drawable/ic_account_circular_border"
-        android:tint="#7E7E7E"
-        app:srcCompat="@drawable/ic_all_account_24dp" />
+        app:srcCompat="@drawable/ic_all_account"
+        tools:ignore="ContentDescription"
+        tools:tint="@color/colorPrimary" />
 
-    <androidx.appcompat.widget.AppCompatTextView
+    <TextView
         android:id="@+id/accountItemName"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -33,9 +33,9 @@
         android:ellipsize="end"
         android:maxLines="1"
         android:textSize="16sp"
-        tools:text="@tools:sample/lorem/random" />
+        tools:text="@tools:sample/full_names" />
 
-    <androidx.appcompat.widget.AppCompatTextView
+    <TextView
         android:id="@+id/accountItemSchool"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -47,6 +47,7 @@
         android:layout_toRightOf="@id/accountItemImage"
         android:ellipsize="end"
         android:maxLines="1"
+        android:textColor="?android:textColorSecondary"
         android:textSize="12sp"
         tools:text="@tools:sample/lorem/random" />
 </RelativeLayout>
diff --git a/app/src/main/res/layout/item_attendance.xml b/app/src/main/res/layout/item_attendance.xml
index be54b91b3..95a8f0174 100644
--- a/app/src/main/res/layout/item_attendance.xml
+++ b/app/src/main/res/layout/item_attendance.xml
@@ -4,7 +4,7 @@
     android:id="@+id/attendanceItemContainer"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:background="?attr/selectableItemBackground"
+    android:background="?selectableItemBackground"
     android:paddingStart="12dp"
     android:paddingLeft="12dp"
     android:paddingTop="7dp"
@@ -19,10 +19,10 @@
         android:layout_height="40dp"
         android:layout_centerVertical="true"
         android:gravity="center"
+        android:includeFontPadding="false"
         android:maxLength="2"
-        android:text="0"
         android:textSize="32sp"
-        tools:ignore="all" />
+        tools:text="5" />
 
     <TextView
         android:id="@+id/attendanceItemSubject"
@@ -33,13 +33,14 @@
         android:layout_marginLeft="10dp"
         android:layout_marginEnd="40dp"
         android:layout_marginRight="40dp"
+        android:layout_toStartOf="@id/attendanceItemAlert"
+        android:layout_toLeftOf="@id/attendanceItemAlert"
         android:layout_toEndOf="@+id/attendanceItemNumber"
         android:layout_toRightOf="@+id/attendanceItemNumber"
         android:ellipsize="end"
         android:maxLines="1"
-        android:text="@string/app_name"
         android:textSize="17sp"
-        tools:ignore="all" />
+        tools:text="Matematyka" />
 
     <TextView
         android:id="@+id/attendanceItemDescription"
@@ -49,9 +50,9 @@
         android:layout_alignLeft="@id/attendanceItemSubject"
         android:layout_alignBottom="@+id/attendanceItemNumber"
         android:maxLines="1"
-        android:text="@string/app_name"
-        android:textColor="?android:attr/android:textColorSecondary"
-        android:textSize="12sp" />
+        android:textColor="?android:textColorSecondary"
+        android:textSize="12sp"
+        tools:text="Present" />
 
     <ImageView
         android:id="@+id/attendanceItemAlert"
@@ -60,7 +61,7 @@
         android:layout_alignParentEnd="true"
         android:layout_alignParentRight="true"
         android:layout_marginTop="10dp"
-        app:srcCompat="@drawable/ic_all_note_24dp"
+        app:srcCompat="@drawable/ic_all_mark"
+        app:tint="?colorPrimary"
         tools:ignore="contentDescription" />
-
 </RelativeLayout>
diff --git a/app/src/main/res/layout/item_attendance_summary.xml b/app/src/main/res/layout/item_attendance_summary.xml
index 07392e56f..b49461955 100644
--- a/app/src/main/res/layout/item_attendance_summary.xml
+++ b/app/src/main/res/layout/item_attendance_summary.xml
@@ -65,7 +65,7 @@
             tools:text="50" />
     </LinearLayout>
 
-    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="@drawable/ic_all_divider"
@@ -96,7 +96,7 @@
             tools:text="0" />
     </LinearLayout>
 
-    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="@drawable/ic_all_divider"
@@ -127,7 +127,7 @@
             tools:text="25" />
     </LinearLayout>
 
-    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="@drawable/ic_all_divider"
@@ -158,7 +158,7 @@
             tools:text="0" />
     </LinearLayout>
 
-    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="@drawable/ic_all_divider"
@@ -189,7 +189,7 @@
             tools:text="6" />
     </LinearLayout>
 
-    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="@drawable/ic_all_divider"
@@ -220,7 +220,7 @@
             tools:text="0" />
     </LinearLayout>
 
-    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="@drawable/ic_all_divider"
diff --git a/app/src/main/res/layout/item_attendance_summary_subject.xml b/app/src/main/res/layout/item_attendance_summary_subject.xml
index 6e19a0817..263c08a73 100644
--- a/app/src/main/res/layout/item_attendance_summary_subject.xml
+++ b/app/src/main/res/layout/item_attendance_summary_subject.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/attendanceSummaryItemSubject"
     android:layout_width="match_parent"
     android:layout_height="48dp"
@@ -11,5 +12,5 @@
     android:textAlignment="textStart"
     android:paddingBottom="12dp"
     android:ellipsize="end"
-    android:text="@string/app_name"
+    tools:text="Geografia"
     android:textSize="16sp" />
diff --git a/app/src/main/res/layout/item_completed_lesson.xml b/app/src/main/res/layout/item_completed_lesson.xml
index a437bf8cc..8b49ba765 100644
--- a/app/src/main/res/layout/item_completed_lesson.xml
+++ b/app/src/main/res/layout/item_completed_lesson.xml
@@ -1,18 +1,18 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/completedLesson_subitem_container"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:background="@drawable/ic_all_divider"
-    android:foreground="?attr/selectableItemBackgroundBorderless"
-    android:paddingStart="12dp"
-    android:paddingLeft="12dp"
-    android:paddingTop="7dp"
+    android:foreground="?selectableItemBackground"
+    android:paddingStart="8dp"
+    android:paddingLeft="8dp"
+    android:paddingTop="6dp"
     android:paddingEnd="12dp"
     android:paddingRight="12dp"
-    android:paddingBottom="7dp"
-    tools:context=".ui.modules.timetable.completed.CompletedLessonItem">
+    android:paddingBottom="6dp"
+    tools:context=".ui.modules.timetable.completed.CompletedLessonItem"
+    tools:ignore="UnusedAttribute">
 
     <TextView
         android:id="@+id/completedLessonItemNumber"
@@ -20,6 +20,7 @@
         android:layout_height="40dp"
         android:layout_centerVertical="true"
         android:gravity="center"
+        android:includeFontPadding="false"
         android:maxLength="2"
         android:textSize="32sp"
         tools:ignore="all"
@@ -30,16 +31,17 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignParentTop="true"
-        android:layout_marginStart="10dp"
-        android:layout_marginLeft="10dp"
+        android:layout_marginStart="8dp"
+        android:layout_marginLeft="8dp"
         android:layout_marginEnd="40dp"
         android:layout_marginRight="40dp"
+        android:layout_toStartOf="@id/completedLessonItemAlert"
+        android:layout_toLeftOf="@id/completedLessonItemAlert"
         android:layout_toEndOf="@+id/completedLessonItemNumber"
         android:layout_toRightOf="@+id/completedLessonItemNumber"
         android:ellipsize="end"
         android:maxLines="1"
         android:textSize="17sp"
-        tools:ignore="RelativeOverlap"
         tools:text="@tools:sample/lorem" />
 
     <TextView
@@ -55,7 +57,7 @@
         android:layout_marginRight="40dp"
         android:ellipsize="end"
         android:maxLines="1"
-        android:textColor="?android:attr/android:textColorSecondary"
+        android:textColor="?android:textColorSecondary"
         android:textSize="12sp"
         tools:text="@tools:sample/lorem" />
 
@@ -65,8 +67,8 @@
         android:layout_height="wrap_content"
         android:layout_alignParentEnd="true"
         android:layout_alignParentRight="true"
-        android:layout_marginTop="10dp"
-        app:srcCompat="@drawable/ic_timetable_swap_30dp"
+        android:layout_centerVertical="true"
+        android:tint="?colorTimetableChange"
+        app:srcCompat="@drawable/ic_timetable_swap"
         tools:ignore="contentDescription" />
-
 </RelativeLayout>
diff --git a/app/src/main/res/layout/item_exam.xml b/app/src/main/res/layout/item_exam.xml
index 801e1dea2..459a7ecb3 100644
--- a/app/src/main/res/layout/item_exam.xml
+++ b/app/src/main/res/layout/item_exam.xml
@@ -3,7 +3,7 @@
     android:id="@+id/exams_subitem_container"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:background="?attr/selectableItemBackground"
+    android:background="?selectableItemBackground"
     tools:context=".ui.modules.exam.ExamItem">
 
     <TextView
@@ -13,8 +13,8 @@
         android:layout_marginStart="20dp"
         android:layout_marginLeft="20dp"
         android:layout_marginTop="10dp"
-        android:text="@string/app_name"
-        android:textSize="15sp" />
+        android:textSize="15sp"
+        tools:text="@tools:sample/lorem" />
 
     <TextView
         android:id="@+id/examItemType"
@@ -25,8 +25,8 @@
         android:layout_alignLeft="@id/examItemSubject"
         android:layout_marginTop="5dp"
         android:layout_marginBottom="5dp"
-        android:text="@string/app_name"
-        android:textSize="13sp" />
+        android:textSize="13sp"
+        tools:text="@tools:sample/lorem" />
 
     <TextView
         android:id="@+id/examItemTeacher"
@@ -44,6 +44,6 @@
         android:layout_toEndOf="@id/examItemType"
         android:layout_toRightOf="@id/examItemType"
         android:gravity="end"
-        android:text="@string/app_name"
-        android:textSize="13sp" />
+        android:textSize="13sp"
+        tools:text="@tools:sample/lorem" />
 </RelativeLayout>
diff --git a/app/src/main/res/layout/item_grade_details.xml b/app/src/main/res/layout/item_grade_details.xml
index 36632d04f..d6d99d9b8 100644
--- a/app/src/main/res/layout/item_grade_details.xml
+++ b/app/src/main/res/layout/item_grade_details.xml
@@ -4,7 +4,7 @@
     android:id="@+id/grade_subitem_container"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:background="?attr/selectableItemBackground"
+    android:background="?selectableItemBackground"
     android:paddingStart="12dp"
     android:paddingLeft="12dp"
     android:paddingTop="7dp"
@@ -21,7 +21,7 @@
         android:background="@color/grade_material_default"
         android:gravity="center"
         android:maxLength="5"
-        android:textColor="@color/grade_text"
+        android:textColor="@android:color/white"
         android:textSize="16sp"
         tools:text="6" />
 
@@ -40,8 +40,8 @@
         android:layout_toRightOf="@+id/gradeItemValue"
         android:ellipsize="end"
         android:maxLines="1"
-        android:text="@string/all_description"
-        android:textSize="14sp" />
+        android:textSize="14sp"
+        tools:text="@tools:sample/lorem" />
 
     <TextView
         android:id="@+id/gradeItemDate"
@@ -50,8 +50,8 @@
         android:layout_alignStart="@+id/gradeItemDescription"
         android:layout_alignLeft="@+id/gradeItemDescription"
         android:layout_alignBottom="@+id/gradeItemValue"
-        android:text="@string/all_date"
-        android:textSize="12sp" />
+        android:textSize="12sp"
+        tools:text="@tools:sample/lorem" />
 
     <TextView
         android:id="@+id/gradeItemWeight"
@@ -66,8 +66,8 @@
         android:layout_toLeftOf="@id/gradeItemNote"
         android:layout_toEndOf="@+id/gradeItemDate"
         android:layout_toRightOf="@+id/gradeItemDate"
-        android:text="@string/grade_weight"
-        android:textSize="12sp" />
+        android:textSize="12sp"
+        tools:text="@tools:sample/lorem" />
 
     <ImageView
         android:id="@+id/gradeItemNote"
@@ -76,6 +76,7 @@
         android:layout_alignParentEnd="true"
         android:layout_alignParentRight="true"
         android:layout_marginTop="10dp"
-        app:srcCompat="@drawable/ic_all_round_note_24dp"
+        app:srcCompat="@drawable/ic_all_round_mark"
+        app:tint="?colorPrimary"
         tools:ignore="contentDescription" />
 </RelativeLayout>
diff --git a/app/src/main/res/layout/item_grade_summary.xml b/app/src/main/res/layout/item_grade_summary.xml
index a650e9dc5..a3a49ab62 100644
--- a/app/src/main/res/layout/item_grade_summary.xml
+++ b/app/src/main/res/layout/item_grade_summary.xml
@@ -3,7 +3,8 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:orientation="vertical">
+    android:orientation="vertical"
+    tools:context=".ui.modules.grade.summary.GradeSummaryItem">
 
     <LinearLayout
         android:layout_width="match_parent"
@@ -31,7 +32,39 @@
             android:layout_height="wrap_content"
             android:gravity="end"
             android:textSize="12sp"
-            tools:text="@string/aboutlibrary_lib_version" />
+            tools:text="4.74" />
+    </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/gradeSummaryItemPointsContainer"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@drawable/ic_all_divider"
+        android:minHeight="35dp"
+        android:orientation="horizontal">
+
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:layout_marginStart="20dp"
+            android:layout_marginLeft="20dp"
+            android:layout_weight="1"
+            android:text="@string/grade_summary_points"
+            android:textSize="14sp" />
+
+        <TextView
+            android:id="@+id/gradeSummaryItemPoints"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:layout_marginStart="10dp"
+            android:layout_marginLeft="10dp"
+            android:layout_marginEnd="25dp"
+            android:layout_marginRight="25dp"
+            android:gravity="end"
+            android:textSize="12sp"
+            tools:text="123/150" />
     </LinearLayout>
 
     <LinearLayout
@@ -62,7 +95,7 @@
             android:layout_marginRight="25dp"
             android:gravity="end"
             android:textSize="12sp"
-            tools:text="@string/aboutlibrary_lib_version" />
+            tools:text="5" />
     </LinearLayout>
 
     <LinearLayout
@@ -79,7 +112,7 @@
             android:layout_marginStart="20dp"
             android:layout_marginLeft="20dp"
             android:layout_weight="1"
-            android:text="@string/grade_summary_final_average"
+            android:text="@string/grade_summary_final_grade"
             android:textSize="14sp" />
 
         <TextView
@@ -93,6 +126,6 @@
             android:layout_marginRight="25dp"
             android:gravity="end"
             android:textSize="12sp"
-            tools:text="@string/aboutlibrary_lib_version" />
+            tools:text="5" />
     </LinearLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/item_homework.xml b/app/src/main/res/layout/item_homework.xml
index 4e90a5828..68169039d 100644
--- a/app/src/main/res/layout/item_homework.xml
+++ b/app/src/main/res/layout/item_homework.xml
@@ -3,7 +3,7 @@
     android:id="@+id/homework_subitem_container"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:background="?attr/selectableItemBackground"
+    android:background="?selectableItemBackground"
     tools:context=".ui.modules.homework.HomeworkItem">
 
     <TextView
@@ -14,8 +14,8 @@
         android:layout_marginLeft="15dp"
         android:layout_marginTop="10dp"
         android:layout_marginBottom="5dp"
-        android:text="@string/all_date"
-        android:textSize="17sp" />
+        android:textSize="17sp"
+        tools:text="@tools:sample/lorem" />
 
     <TextView
         android:id="@+id/homeworkItemTeacher"
@@ -31,8 +31,8 @@
         android:layout_toEndOf="@id/homeworkItemSubject"
         android:layout_toRightOf="@id/homeworkItemSubject"
         android:gravity="end"
-        android:text="@string/all_teacher"
-        android:textSize="13sp" />
+        android:textSize="13sp"
+        tools:text="@tools:sample/full_names" />
 
     <TextView
         android:id="@+id/homeworkItemContent"
@@ -45,6 +45,6 @@
         android:layout_marginRight="15dp"
         android:layout_marginBottom="15dp"
         android:lineSpacingMultiplier="1.2"
-        android:text="@string/all_content"
-        android:textSize="14sp" />
+        android:textSize="14sp"
+        tools:text="@tools:sample/lorem" />
 </RelativeLayout>
diff --git a/app/src/main/res/layout/item_license.xml b/app/src/main/res/layout/item_license.xml
new file mode 100644
index 000000000..6a864433a
--- /dev/null
+++ b/app/src/main/res/layout/item_license.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="64dp"
+    android:background="?selectableItemBackground"
+    android:orientation="vertical"
+    android:paddingStart="16dp"
+    android:paddingLeft="16dp"
+    android:paddingEnd="16dp"
+    android:paddingRight="16dp">
+
+    <TextView
+        android:id="@+id/licenseItemName"
+        android:layout_width="match_parent"
+        android:layout_height="28dp"
+        android:gravity="bottom"
+        android:textSize="16sp"
+        tools:text="@tools:sample/lorem" />
+
+    <TextView
+        android:id="@+id/licenseItemSummary"
+        android:layout_width="match_parent"
+        android:layout_height="20dp"
+        android:gravity="bottom"
+        android:textColor="?android:textColorSecondary"
+        android:textSize="14sp"
+        tools:text="@tools:sample/lorem" />
+</LinearLayout>
diff --git a/app/src/main/res/layout/item_login_student_select.xml b/app/src/main/res/layout/item_login_student_select.xml
index f13eb6010..254bff60f 100644
--- a/app/src/main/res/layout/item_login_student_select.xml
+++ b/app/src/main/res/layout/item_login_student_select.xml
@@ -1,46 +1,49 @@
-<?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/loginItemContainer"
     android:layout_width="match_parent"
     android:layout_height="72dp"
-    android:background="?attr/selectableItemBackground"
-    android:clickable="true"
-    android:focusable="true"
-    android:padding="16dp"
-    tools:context=".ui.modules.login.studentselect.LoginStudentSelectItem">
+    android:background="?selectableItemBackground">
 
-    <androidx.appcompat.widget.AppCompatImageView
-        android:id="@+id/loginItemImage"
-        android:layout_width="40dp"
-        android:layout_height="40dp"
-        android:layout_marginEnd="16dp"
-        android:layout_marginRight="16dp"
-        app:srcCompat="@drawable/ic_all_account_24dp"
-        app:tint="?android:textColorPrimary" />
+    <com.google.android.material.checkbox.MaterialCheckBox
+        android:id="@+id/loginItemCheck"
+        android:layout_width="32dp"
+        android:layout_height="24dp"
+        android:layout_marginStart="12dp"
+        android:layout_marginLeft="12dp"
+        android:layout_marginTop="24dp"
+        android:layout_marginEnd="28dp"
+        android:layout_marginRight="28dp"
+        android:background="@android:color/transparent"
+        tools:text=" " />
 
     <TextView
         android:id="@+id/loginItemName"
         android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_toEndOf="@id/loginItemImage"
-        android:layout_toRightOf="@id/loginItemImage"
+        android:layout_height="32dp"
+        android:layout_marginEnd="16dp"
+        android:layout_marginRight="16dp"
+        android:layout_toEndOf="@id/loginItemCheck"
+        android:layout_toRightOf="@id/loginItemCheck"
         android:ellipsize="end"
+        android:gravity="bottom"
         android:maxLines="1"
-        android:text="@string/app_name"
         android:textSize="16sp"
-        app:firstBaselineToTopHeight="16dp" />
+        tools:text="@tools:sample/full_names" />
 
     <TextView
         android:id="@+id/loginItemSchool"
         android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_toEndOf="@id/loginItemImage"
-        android:layout_toRightOf="@id/loginItemImage"
+        android:layout_height="20dp"
+        android:layout_below="@id/loginItemName"
+        android:layout_marginEnd="16dp"
+        android:layout_marginRight="16dp"
+        android:layout_toEndOf="@id/loginItemCheck"
+        android:layout_toRightOf="@id/loginItemCheck"
         android:ellipsize="end"
+        android:gravity="bottom"
         android:maxLines="1"
-        android:text="@string/app_name"
-        android:textSize="12sp"
-        app:firstBaselineToTopHeight="36dp" />
-
+        android:textColor="?android:textColorSecondary"
+        android:textSize="14sp"
+        tools:text="@tools:sample/lorem/random" />
 </RelativeLayout>
diff --git a/app/src/main/res/layout/item_message.xml b/app/src/main/res/layout/item_message.xml
index e7322afac..ad914130a 100644
--- a/app/src/main/res/layout/item_message.xml
+++ b/app/src/main/res/layout/item_message.xml
@@ -2,7 +2,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:background="?attr/selectableItemBackground"
+    android:background="?selectableItemBackground"
     android:paddingLeft="16dp"
     android:paddingTop="10dp"
     android:paddingRight="16dp"
@@ -33,7 +33,7 @@
         android:layout_toRightOf="@id/messageItemAuthor"
         android:gravity="end"
         android:textSize="13sp"
-        tools:text="@tools:sample/date/mmddyy" />
+        tools:text="@tools:sample/date/ddmmyy" />
 
     <TextView
         android:id="@+id/messageItemSubject"
@@ -45,8 +45,7 @@
         android:layout_marginTop="5dp"
         android:ellipsize="end"
         android:maxLines="1"
-        android:textColor="?android:attr/android:textColorSecondary"
+        android:textColor="?android:textColorSecondary"
         android:textSize="12sp"
-        tools:text="@tools:sample/lorem" />
-
+        tools:text="@tools:sample/lorem/random" />
 </RelativeLayout>
diff --git a/app/src/main/res/layout/item_mobile_device.xml b/app/src/main/res/layout/item_mobile_device.xml
new file mode 100644
index 000000000..95159d9bd
--- /dev/null
+++ b/app/src/main/res/layout/item_mobile_device.xml
@@ -0,0 +1,52 @@
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/mobileDevice_subitem_container"
+    android:layout_width="match_parent"
+    android:layout_height="64dp"
+    tools:context=".ui.modules.mobiledevice.MobileDeviceItem">
+
+    <TextView
+        android:id="@+id/mobileDeviceItemName"
+        android:layout_width="match_parent"
+        android:layout_height="32dp"
+        android:layout_marginStart="16dp"
+        android:layout_marginLeft="16dp"
+        android:layout_toStartOf="@id/mobileDeviceItemUnregister"
+        android:layout_toLeftOf="@id/mobileDeviceItemUnregister"
+        android:ellipsize="end"
+        android:gravity="bottom"
+        android:maxLines="1"
+        android:textSize="16sp"
+        tools:text="@tools:sample/lorem/random" />
+
+    <TextView
+        android:id="@+id/mobileDeviceItemDate"
+        android:layout_width="match_parent"
+        android:layout_height="20dp"
+        android:layout_below="@id/mobileDeviceItemName"
+        android:layout_marginStart="16dp"
+        android:layout_marginLeft="16dp"
+        android:layout_toStartOf="@id/mobileDeviceItemUnregister"
+        android:layout_toLeftOf="@id/mobileDeviceItemUnregister"
+        android:gravity="bottom"
+        android:textColor="?android:textColorSecondary"
+        android:textSize="14sp"
+        tools:text="@tools:sample/date/ddmmyy" />
+
+    <ImageButton
+        android:id="@+id/mobileDeviceItemUnregister"
+        android:layout_width="48dp"
+        android:layout_height="48dp"
+        android:layout_alignParentEnd="true"
+        android:layout_alignParentRight="true"
+        android:layout_centerVertical="true"
+        android:layout_marginStart="4dp"
+        android:layout_marginLeft="4dp"
+        android:layout_marginEnd="4dp"
+        android:layout_marginRight="4dp"
+        android:background="?selectableItemBackgroundBorderless"
+        android:contentDescription="@string/mobile_devices_unregister"
+        app:srcCompat="@drawable/ic_menu_message_delete"
+        app:tint="?colorOnBackground" />
+</RelativeLayout>
diff --git a/app/src/main/res/layout/item_more.xml b/app/src/main/res/layout/item_more.xml
index 07eb3344f..6a941b96d 100644
--- a/app/src/main/res/layout/item_more.xml
+++ b/app/src/main/res/layout/item_more.xml
@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="56dp"
-    android:background="?attr/selectableItemBackground"
+    android:background="?selectableItemBackground"
     android:orientation="horizontal"
     android:paddingLeft="16dp"
     android:paddingTop="8dp"
@@ -12,21 +12,22 @@
     android:paddingBottom="8dp"
     tools:context=".ui.modules.more.MoreItem">
 
-    <androidx.appcompat.widget.AppCompatImageView
+    <ImageView
         android:id="@+id/moreItemImage"
         android:layout_width="24dp"
         android:layout_height="24dp"
         android:layout_gravity="center_vertical"
-        app:srcCompat="@drawable/ic_more_settings_24dp"
-        app:tint="?android:attr/android:textColorSecondary" />
+        app:srcCompat="@drawable/ic_more_settings"
+        app:tint="?colorOnBackground"
+        tools:ignore="ContentDescription" />
 
-    <androidx.appcompat.widget.AppCompatTextView
+    <TextView
         android:id="@+id/moreItemTitle"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_vertical"
         android:layout_marginStart="32dp"
         android:layout_marginLeft="32dp"
-        android:text="@string/app_name"
-        android:textSize="16sp" />
+        android:textSize="16sp"
+        tools:text="@tools:sample/lorem" />
 </LinearLayout>
diff --git a/app/src/main/res/layout/item_note.xml b/app/src/main/res/layout/item_note.xml
index 76fb6a8c3..a5d3e3623 100644
--- a/app/src/main/res/layout/item_note.xml
+++ b/app/src/main/res/layout/item_note.xml
@@ -3,7 +3,7 @@
     android:id="@+id/note_subitem_container"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:background="?attr/selectableItemBackground"
+    android:background="?selectableItemBackground"
     tools:context=".ui.modules.note.NoteItem">
 
     <TextView
@@ -13,8 +13,8 @@
         android:layout_marginStart="15dp"
         android:layout_marginLeft="15dp"
         android:layout_marginTop="10dp"
-        android:text="@string/all_date"
-        android:textSize="15sp" />
+        android:textSize="15sp"
+        tools:text="@tools:sample/date/ddmmyy" />
 
     <TextView
         android:id="@+id/noteItemTeacher"
@@ -30,8 +30,8 @@
         android:layout_toEndOf="@id/noteItemDate"
         android:layout_toRightOf="@id/noteItemDate"
         android:gravity="end"
-        android:text="@string/all_teacher"
-        android:textSize="13sp" />
+        android:textSize="13sp"
+        tools:text="@tools:sample/full_names" />
 
     <TextView
         android:id="@+id/noteItemType"
@@ -42,8 +42,8 @@
         android:layout_alignLeft="@id/noteItemDate"
         android:layout_marginTop="5dp"
         android:layout_marginBottom="5dp"
-        android:text="@string/exam_type"
-        android:textSize="13sp" />
+        android:textSize="13sp"
+        tools:text="@tools:sample/lorem" />
 
     <TextView
         android:id="@+id/noteItemContent"
@@ -56,6 +56,6 @@
         android:layout_marginRight="15dp"
         android:layout_marginBottom="15dp"
         android:lineSpacingMultiplier="1.2"
-        android:text="@string/all_description"
-        android:textSize="14sp" />
+        android:textSize="14sp"
+        tools:text="@tools:sample/lorem/random" />
 </RelativeLayout>
diff --git a/app/src/main/res/layout/item_teacher.xml b/app/src/main/res/layout/item_teacher.xml
new file mode 100644
index 000000000..3bac0573c
--- /dev/null
+++ b/app/src/main/res/layout/item_teacher.xml
@@ -0,0 +1,53 @@
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?selectableItemBackground"
+    android:paddingStart="12dp"
+    android:paddingLeft="12dp"
+    android:paddingTop="7dp"
+    android:paddingEnd="12dp"
+    android:paddingRight="12dp"
+    android:paddingBottom="7dp"
+    tools:context=".ui.modules.schoolandteachers.teacher.TeacherItem">
+
+    <TextView
+        android:id="@+id/teacherItemName"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentTop="true"
+        android:layout_marginStart="10dp"
+        android:layout_marginLeft="10dp"
+        android:ellipsize="end"
+        android:maxLines="1"
+        android:textSize="17sp"
+        tools:text="@tools:sample/full_names" />
+
+    <TextView
+        android:id="@+id/teacherItemShortName"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="4dp"
+        android:layout_marginLeft="4dp"
+        android:layout_marginEnd="40dp"
+        android:layout_marginRight="40dp"
+        android:layout_toEndOf="@+id/teacherItemName"
+        android:layout_toRightOf="@+id/teacherItemName"
+        android:maxLines="1"
+        android:textColor="?android:textColorSecondary"
+        android:textSize="17sp"
+        tools:text="[LI]" />
+
+    <TextView
+        android:id="@+id/teacherItemSubject"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_below="@+id/teacherItemName"
+        android:layout_alignStart="@id/teacherItemName"
+        android:layout_alignLeft="@id/teacherItemName"
+        android:maxLines="1"
+        android:textColor="?android:textColorSecondary"
+        android:textSize="12sp"
+        tools:text="11:11-12:00" />
+
+</RelativeLayout>
diff --git a/app/src/main/res/layout/item_timetable.xml b/app/src/main/res/layout/item_timetable.xml
index 6afc41536..fcdae2e0a 100644
--- a/app/src/main/res/layout/item_timetable.xml
+++ b/app/src/main/res/layout/item_timetable.xml
@@ -1,28 +1,26 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/timetable_subitem_container"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:background="?attr/selectableItemBackground"
-    android:paddingStart="12dp"
-    android:paddingLeft="12dp"
-    android:paddingTop="7dp"
+    android:background="?selectableItemBackground"
+    android:paddingStart="8dp"
+    android:paddingLeft="8dp"
+    android:paddingTop="6dp"
     android:paddingEnd="12dp"
     android:paddingRight="12dp"
-    android:paddingBottom="7dp"
+    android:paddingBottom="6dp"
     tools:context=".ui.modules.timetable.TimetableItem">
 
     <TextView
         android:id="@+id/timetableItemNumber"
         android:layout_width="40dp"
         android:layout_height="40dp"
-        android:layout_centerVertical="true"
         android:gravity="center"
+        android:includeFontPadding="false"
         android:maxLength="2"
-        android:text="0"
         android:textSize="32sp"
-        tools:ignore="all" />
+        android:textColor="?android:textColorPrimary"
+        tools:text="5" />
 
     <TextView
         android:id="@+id/timetableItemSubject"
@@ -33,25 +31,41 @@
         android:layout_marginLeft="10dp"
         android:layout_marginEnd="40dp"
         android:layout_marginRight="40dp"
-        android:layout_toEndOf="@+id/timetableItemNumber"
-        android:layout_toRightOf="@+id/timetableItemNumber"
+        android:layout_toEndOf="@+id/timetableItemTimeStart"
+        android:layout_toRightOf="@+id/timetableItemTimeStart"
         android:ellipsize="end"
         android:maxLines="1"
-        android:text="@string/app_name"
-        android:textSize="17sp"
-        tools:ignore="RelativeOverlap" />
+        android:textSize="15sp"
+        android:textColor="?android:textColorPrimary"
+        tools:text="@tools:sample/lorem" />
 
     <TextView
-        android:id="@+id/timetableItemTime"
+        android:id="@+id/timetableItemTimeStart"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_alignStart="@id/timetableItemSubject"
-        android:layout_alignLeft="@id/timetableItemSubject"
+        android:layout_toEndOf="@id/timetableItemNumber"
+        android:layout_toRightOf="@id/timetableItemNumber"
+        android:layout_marginLeft="8dp"
+        android:layout_marginStart="8dp"
+        android:layout_alignTop="@id/timetableItemNumber"
+        android:maxLines="1"
+        android:textColor="?android:textColorSecondary"
+        android:textSize="13sp"
+        tools:text="11:11" />
+
+    <TextView
+        android:id="@+id/timetableItemTimeFinish"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_toEndOf="@id/timetableItemNumber"
+        android:layout_toRightOf="@id/timetableItemNumber"
+        android:layout_marginLeft="8dp"
+        android:layout_marginStart="8dp"
         android:layout_alignBottom="@+id/timetableItemNumber"
         android:maxLines="1"
-        android:text="@string/app_name"
-        android:textColor="?android:attr/android:textColorSecondary"
-        android:textSize="12sp" />
+        android:textColor="?android:textColorSecondary"
+        android:textSize="13sp"
+        tools:text="12:00" />
 
     <TextView
         android:id="@+id/timetableItemRoom"
@@ -60,24 +74,47 @@
         android:layout_alignBottom="@+id/timetableItemNumber"
         android:layout_marginStart="10dp"
         android:layout_marginLeft="10dp"
-        android:layout_marginEnd="40dp"
-        android:layout_marginRight="40dp"
-        android:layout_toEndOf="@+id/timetableItemTime"
-        android:layout_toRightOf="@+id/timetableItemTime"
+        android:layout_toEndOf="@+id/timetableItemTimeStart"
+        android:layout_toRightOf="@+id/timetableItemTimeStart"
         android:maxLines="1"
-        android:text="@string/app_name"
-        android:textColor="?android:attr/android:textColorSecondary"
-        android:textSize="12sp"
-        tools:ignore="RelativeOverlap" />
+        android:textColor="?android:textColorSecondary"
+        android:textSize="13sp"
+        tools:text="22"
+        tools:visibility="gone" />
 
-    <ImageView
-        android:id="@+id/timetableItemAlert"
+    <TextView
+        android:id="@+id/timetableItemTeacher"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_alignParentEnd="true"
-        android:layout_alignParentRight="true"
-        android:layout_marginTop="10dp"
-        app:srcCompat="@drawable/ic_timetable_swap_30dp"
-        tools:ignore="contentDescription" />
+        android:layout_alignBottom="@+id/timetableItemNumber"
+        android:layout_marginStart="10dp"
+        android:layout_marginLeft="10dp"
+        android:layout_marginEnd="16dp"
+        android:layout_marginRight="16dp"
+        android:layout_toEndOf="@id/timetableItemRoom"
+        android:layout_toRightOf="@id/timetableItemRoom"
+        android:maxLines="1"
+        android:ellipsize="end"
+        android:textColor="?android:textColorSecondary"
+        android:textSize="13sp"
+        tools:text="Agata Kowalska - Błaszczyk"
+        tools:visibility="gone" />
+
+    <TextView
+        android:id="@+id/timetableItemDescription"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignTop="@+id/timetableItemTimeFinish"
+        android:layout_marginStart="10dp"
+        android:layout_marginLeft="10dp"
+        android:layout_marginTop="0dp"
+        android:layout_marginEnd="16dp"
+        android:layout_marginRight="16dp"
+        android:layout_toEndOf="@+id/timetableItemTimeStart"
+        android:layout_toRightOf="@+id/timetableItemTimeStart"
+        android:textColor="?colorTimetableChange"
+        android:textSize="13sp"
+        tools:text="Lekcja odwołana: uczniowie zwolnieni do domu"
+        tools:visibility="visible" />
 
 </RelativeLayout>
diff --git a/app/src/main/res/layout/item_widget_timetable.xml b/app/src/main/res/layout/item_widget_timetable.xml
index af0552807..c69bade8a 100644
--- a/app/src/main/res/layout/item_widget_timetable.xml
+++ b/app/src/main/res/layout/item_widget_timetable.xml
@@ -1,85 +1,134 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/timetableWidgetItemContainer"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:background="@drawable/ic_all_divider"
     android:minHeight="45dp"
-    android:orientation="horizontal"
-    tools:context=".ui.widgets.timetable.TimetableWidgetFactory">
+    android:orientation="vertical"
+    tools:context=".ui.modules.timetablewidget.TimetableWidgetFactory">
 
-    <TextView
-        android:id="@+id/timetableWidgetItemNumber"
-        android:layout_width="45dp"
-        android:layout_height="45dp"
-        android:layout_centerVertical="true"
-        android:layout_marginStart="5dp"
-        android:layout_marginLeft="5dp"
-        android:gravity="center"
-        android:maxLines="1"
-        android:textColor="@android:color/black"
-        android:textSize="25sp"
-        tools:text="1" />
-
-    <TextView
-        android:id="@+id/timetableWidgetItemTime"
-        android:layout_width="wrap_content"
+    <RelativeLayout
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_alignParentTop="true"
-        android:layout_marginStart="5dp"
-        android:layout_marginLeft="5dp"
-        android:layout_marginTop="10dp"
-        android:layout_toEndOf="@id/timetableWidgetItemNumber"
-        android:layout_toRightOf="@id/timetableWidgetItemNumber"
-        android:textColor="@android:color/secondary_text_light"
-        android:textSize="13sp"
-        tools:text="08:00 - 08:45" />
+        android:background="@android:color/white"
+        android:paddingTop="6dp"
+        android:paddingBottom="6dp"
+        android:paddingLeft="6dp"
+        android:paddingStart="6dp"
+        android:paddingEnd="12dp"
+        android:paddingRight="12dp">
 
-    <TextView
-        android:id="@+id/timetableWidgetItemSubject"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="15dp"
-        android:layout_marginLeft="15dp"
-        android:layout_marginTop="5dp"
-        android:layout_marginEnd="25dp"
-        android:layout_marginRight="25dp"
-        android:layout_toEndOf="@id/timetableWidgetItemTime"
-        android:layout_toRightOf="@id/timetableWidgetItemTime"
-        android:textColor="@android:color/secondary_text_light"
-        android:textSize="13sp"
-        tools:text="Język polski" />
+        <TextView
+            android:id="@+id/timetableWidgetItemNumber"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:gravity="center"
+            android:includeFontPadding="false"
+            android:maxLength="2"
+            android:textSize="28sp"
+            android:textColor="@android:color/black"
+            tools:text="5" />
 
-    <TextView
-        android:id="@+id/timetableWidgetItemDescription"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_below="@id/timetableWidgetItemSubject"
-        android:layout_marginStart="15dp"
-        android:layout_marginLeft="15dp"
-        android:layout_marginTop="3dp"
-        android:layout_marginEnd="25dp"
-        android:layout_marginRight="25dp"
-        android:layout_marginBottom="5dp"
-        android:layout_toEndOf="@id/timetableWidgetItemTime"
-        android:layout_toRightOf="@id/timetableWidgetItemTime"
-        android:textColor="@color/colorPrimaryDark"
-        android:textSize="12sp"
-        tools:text="Lekcja odwołana: uczniowie zwolnieni do domu" />
+        <TextView
+            android:id="@+id/timetableWidgetItemSubject"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignTop="@id/timetableWidgetItemNumber"
+            android:layout_marginStart="10dp"
+            android:layout_marginLeft="10dp"
+            android:layout_marginEnd="40dp"
+            android:layout_marginRight="40dp"
+            android:layout_toEndOf="@+id/timetableWidgetItemTimeStart"
+            android:layout_toRightOf="@+id/timetableWidgetItemTimeStart"
+            android:ellipsize="end"
+            android:maxLines="1"
+            android:textSize="15sp"
+            android:textColor="@android:color/black"
+            tools:text="@tools:sample/lorem" />
 
-    <TextView
-        android:id="@+id/timetableWidgetItemRoom"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_below="@id/timetableWidgetItemTime"
-        android:layout_marginStart="5dp"
-        android:layout_marginLeft="5dp"
-        android:layout_marginTop="3dp"
-        android:layout_marginBottom="5dp"
-        android:layout_toEndOf="@id/timetableWidgetItemNumber"
-        android:layout_toRightOf="@id/timetableWidgetItemNumber"
-        android:textColor="@android:color/secondary_text_light"
-        android:textSize="12sp"
-        tools:text="Sala 25" />
-</RelativeLayout>
+        <TextView
+            android:id="@+id/timetableWidgetItemTimeStart"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_toEndOf="@id/timetableWidgetItemNumber"
+            android:layout_toRightOf="@id/timetableWidgetItemNumber"
+            android:layout_marginLeft="6dp"
+            android:layout_marginStart="6dp"
+            android:layout_alignTop="@id/timetableWidgetItemNumber"
+            android:maxLines="1"
+            android:textColor="@android:color/black"
+            android:textSize="13sp"
+            tools:text="11:11" />
+
+        <TextView
+            android:id="@+id/timetableWidgetItemTimeFinish"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignBottom="@+id/timetableWidgetItemNumber"
+            android:layout_marginStart="6dp"
+            android:layout_marginLeft="6dp"
+            android:layout_toEndOf="@id/timetableWidgetItemNumber"
+            android:layout_toRightOf="@id/timetableWidgetItemNumber"
+            android:maxLines="1"
+            android:textColor="@android:color/black"
+            android:textSize="13sp"
+            tools:text="12:00" />
+
+        <TextView
+            android:id="@+id/timetableWidgetItemRoom"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignBottom="@+id/timetableWidgetItemNumber"
+            android:layout_marginStart="10dp"
+            android:layout_marginLeft="10dp"
+            android:layout_toEndOf="@+id/timetableWidgetItemTimeStart"
+            android:layout_toRightOf="@+id/timetableWidgetItemTimeStart"
+            android:maxLines="1"
+            android:textColor="@android:color/black"
+            android:textSize="13sp"
+            tools:text="22"
+            tools:visibility="visible" />
+
+        <TextView
+            android:id="@+id/timetableWidgetItemTeacher"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignBottom="@+id/timetableWidgetItemNumber"
+            android:layout_marginStart="8dp"
+            android:layout_marginLeft="8dp"
+            android:layout_marginEnd="16dp"
+            android:layout_marginRight="16dp"
+            android:layout_toEndOf="@id/timetableWidgetItemRoom"
+            android:layout_toRightOf="@id/timetableWidgetItemRoom"
+            android:ellipsize="end"
+            android:maxLines="1"
+            android:textColor="@color/timetable_change_dark"
+            android:textSize="13sp"
+            android:visibility="gone"
+            tools:text="Agata Kowalska - Błaszczyk"
+            tools:visibility="visible" />
+
+        <TextView
+            android:id="@+id/timetableWidgetItemDescription"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignTop="@+id/timetableWidgetItemTimeFinish"
+            android:layout_marginStart="10dp"
+            android:layout_marginLeft="10dp"
+            android:layout_marginEnd="16dp"
+            android:layout_marginRight="16dp"
+            android:layout_marginTop="0dp"
+            android:layout_toEndOf="@+id/timetableWidgetItemTimeStart"
+            android:layout_toRightOf="@+id/timetableWidgetItemTimeStart"
+            android:textColor="@color/timetable_change_dark"
+            android:textSize="13sp"
+            tools:text="Lekcja odwołana: uczniowie zwolnieni do domu"
+            tools:visibility="gone"/>
+    </RelativeLayout>
+
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="1dp"
+        android:background="@color/colorDivider" />
+</LinearLayout>
diff --git a/app/src/main/res/layout/item_widget_timetable_dark.xml b/app/src/main/res/layout/item_widget_timetable_dark.xml
new file mode 100644
index 000000000..3a143f747
--- /dev/null
+++ b/app/src/main/res/layout/item_widget_timetable_dark.xml
@@ -0,0 +1,134 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/timetableWidgetItemContainer"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:minHeight="45dp"
+    android:orientation="vertical"
+    tools:context=".ui.modules.timetablewidget.TimetableWidgetFactory">
+
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@color/colorWidgetBackground"
+        android:paddingTop="6dp"
+        android:paddingBottom="6dp"
+        android:paddingLeft="6dp"
+        android:paddingStart="6dp"
+        android:paddingEnd="12dp"
+        android:paddingRight="12dp">
+
+        <TextView
+            android:id="@+id/timetableWidgetItemNumber"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:gravity="center"
+            android:includeFontPadding="false"
+            android:maxLength="2"
+            android:textSize="28sp"
+            android:textColor="@android:color/white"
+            tools:text="5" />
+
+        <TextView
+            android:id="@+id/timetableWidgetItemSubject"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignTop="@id/timetableWidgetItemNumber"
+            android:layout_marginStart="10dp"
+            android:layout_marginLeft="10dp"
+            android:layout_marginEnd="40dp"
+            android:layout_marginRight="40dp"
+            android:layout_toEndOf="@+id/timetableWidgetItemTimeStart"
+            android:layout_toRightOf="@+id/timetableWidgetItemTimeStart"
+            android:ellipsize="end"
+            android:maxLines="1"
+            android:textSize="15sp"
+            android:textColor="@android:color/white"
+            tools:text="@tools:sample/lorem" />
+
+        <TextView
+            android:id="@+id/timetableWidgetItemTimeStart"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_toEndOf="@id/timetableWidgetItemNumber"
+            android:layout_toRightOf="@id/timetableWidgetItemNumber"
+            android:layout_marginLeft="6dp"
+            android:layout_marginStart="6dp"
+            android:layout_alignTop="@id/timetableWidgetItemNumber"
+            android:maxLines="1"
+            android:textColor="@android:color/white"
+            android:textSize="13sp"
+            tools:text="11:11" />
+
+        <TextView
+            android:id="@+id/timetableWidgetItemTimeFinish"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignBottom="@+id/timetableWidgetItemNumber"
+            android:layout_marginStart="6dp"
+            android:layout_marginLeft="6dp"
+            android:layout_toEndOf="@id/timetableWidgetItemNumber"
+            android:layout_toRightOf="@id/timetableWidgetItemNumber"
+            android:maxLines="1"
+            android:textColor="@android:color/white"
+            android:textSize="13sp"
+            tools:text="12:00" />
+
+        <TextView
+            android:id="@+id/timetableWidgetItemRoom"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignBottom="@+id/timetableWidgetItemNumber"
+            android:layout_marginStart="10dp"
+            android:layout_marginLeft="10dp"
+            android:layout_toEndOf="@+id/timetableWidgetItemTimeStart"
+            android:layout_toRightOf="@+id/timetableWidgetItemTimeStart"
+            android:maxLines="1"
+            android:textColor="@android:color/white"
+            android:textSize="13sp"
+            tools:text="22"
+            tools:visibility="visible" />
+
+        <TextView
+            android:id="@+id/timetableWidgetItemTeacher"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignBottom="@+id/timetableWidgetItemNumber"
+            android:layout_marginStart="8dp"
+            android:layout_marginLeft="8dp"
+            android:layout_marginEnd="16dp"
+            android:layout_marginRight="16dp"
+            android:layout_toEndOf="@id/timetableWidgetItemRoom"
+            android:layout_toRightOf="@id/timetableWidgetItemRoom"
+            android:ellipsize="end"
+            android:maxLines="1"
+            android:textColor="@color/timetable_change_light"
+            android:textSize="13sp"
+            android:visibility="gone"
+            tools:text="Agata Kowalska - Błaszczyk"
+            tools:visibility="visible" />
+
+        <TextView
+            android:id="@+id/timetableWidgetItemDescription"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignTop="@+id/timetableWidgetItemTimeFinish"
+            android:layout_marginStart="10dp"
+            android:layout_marginLeft="10dp"
+            android:layout_marginEnd="16dp"
+            android:layout_marginRight="16dp"
+            android:layout_marginTop="0dp"
+            android:layout_toEndOf="@+id/timetableWidgetItemTimeStart"
+            android:layout_toRightOf="@+id/timetableWidgetItemTimeStart"
+            android:textColor="@color/timetable_change_light"
+            android:textSize="13sp"
+            tools:text="Lekcja odwołana: uczniowie zwolnieni do domu"
+            tools:visibility="gone"/>
+    </RelativeLayout>
+
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="1dp"
+        android:background="@color/colorDividerInverse" />
+</LinearLayout>
diff --git a/app/src/main/res/layout/scrollable_header_about.xml b/app/src/main/res/layout/scrollable_header_about.xml
new file mode 100644
index 000000000..9b7bb7324
--- /dev/null
+++ b/app/src/main/res/layout/scrollable_header_about.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="104dp"
+    android:orientation="vertical">
+
+    <ImageView
+        android:id="@+id/aboutScrollableHeaderIcon"
+        android:layout_width="40dp"
+        android:layout_height="40dp"
+        android:layout_marginEnd="24dp"
+        android:layout_marginRight="24dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintHorizontal_chainStyle="packed"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toLeftOf="@id/aboutScrollableHeaderName"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:ignore="ContentDescription"
+        tools:src="@mipmap/ic_launcher" />
+
+    <TextView
+        android:id="@+id/aboutScrollableHeaderName"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/app_name"
+        android:textSize="24sp"
+        app:layout_constraintBottom_toBottomOf="@id/aboutScrollableHeaderIcon"
+        app:layout_constraintLeft_toRightOf="@id/aboutScrollableHeaderIcon"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="@id/aboutScrollableHeaderIcon" />
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/layout/scrollable_header_attendance_summary.xml b/app/src/main/res/layout/scrollable_header_attendance_summary.xml
index 37bbb32b1..94de11076 100644
--- a/app/src/main/res/layout/scrollable_header_attendance_summary.xml
+++ b/app/src/main/res/layout/scrollable_header_attendance_summary.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_marginTop="20dp"
@@ -20,6 +21,6 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:gravity="center_horizontal"
-        android:text="100%"
-        android:textSize="21sp" />
+        android:textSize="21sp"
+        tools:text="100%" />
 </LinearLayout>
diff --git a/app/src/main/res/layout/scrollable_header_grade_summary.xml b/app/src/main/res/layout/scrollable_header_grade_summary.xml
index cb28d43ec..ec069f8cf 100644
--- a/app/src/main/res/layout/scrollable_header_grade_summary.xml
+++ b/app/src/main/res/layout/scrollable_header_grade_summary.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_marginBottom="20dp"
@@ -9,9 +10,9 @@
     <LinearLayout
         android:layout_width="150dp"
         android:layout_height="wrap_content"
+        android:layout_marginTop="20dp"
         android:layout_marginEnd="5dp"
         android:layout_marginRight="5dp"
-        android:layout_marginTop="20dp"
         android:orientation="vertical">
 
         <TextView
@@ -27,8 +28,8 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:gravity="center_horizontal"
-            android:text="6,00"
-            android:textSize="21sp" />
+            android:textSize="21sp"
+            tools:text="6,00" />
     </LinearLayout>
 
     <LinearLayout
@@ -50,7 +51,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:gravity="center_horizontal"
-            android:text="6,00"
-            android:textSize="21sp" />
+            android:textSize="21sp"
+            tools:text="6,00" />
     </LinearLayout>
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/widget_luckynumber.xml b/app/src/main/res/layout/widget_luckynumber.xml
new file mode 100644
index 000000000..360a19708
--- /dev/null
+++ b/app/src/main/res/layout/widget_luckynumber.xml
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/luckyNumberWidgetContainer"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    android:background="@drawable/background_luckynumber_widget"
+    android:gravity="center"
+    android:padding="10dp"
+    tools:context=".ui.modules.luckynumberwidget.LuckyNumberWidgetProvider">
+
+    <ImageView
+        android:id="@+id/luckyNumberWidgetImageTop"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_above="@id/luckyNumberWidgetNumber"
+        android:layout_centerHorizontal="true"
+        android:layout_marginBottom="20dp"
+        android:contentDescription="@string/lucky_number_title"
+        android:gravity="center"
+        android:src="@drawable/ic_widget_clover"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <TextView
+        android:id="@+id/luckyNumberWidgetTitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="0dp"
+        android:gravity="center"
+        android:labelFor="@id/luckyNumberWidgetImageTop"
+        android:text="@string/lucky_number_title"
+        android:textAlignment="center"
+        android:textColor="#8c8c8c"
+        android:textSize="22sp"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <ImageView
+        android:id="@+id/luckyNumberWidgetImageLeft"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignTop="@id/luckyNumberWidgetNumber"
+        android:contentDescription="@string/lucky_number_title"
+        android:src="@drawable/ic_widget_clover"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <TextView
+        android:id="@+id/luckyNumberWidgetNumber"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/luckyNumberWidgetTitle"
+        android:layout_toEndOf="@id/luckyNumberWidgetImageLeft"
+        android:layout_toRightOf="@id/luckyNumberWidgetImageLeft"
+        android:gravity="center"
+        android:text="#"
+        android:textAlignment="center"
+        android:textColor="#404040"
+        android:textSize="34sp"
+        tools:ignore="HardcodedText"
+        tools:text="13" />
+</RelativeLayout>
diff --git a/app/src/main/res/layout/widget_luckynumber_dark.xml b/app/src/main/res/layout/widget_luckynumber_dark.xml
new file mode 100644
index 000000000..77174730c
--- /dev/null
+++ b/app/src/main/res/layout/widget_luckynumber_dark.xml
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/luckyNumberWidgetContainer"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    android:background="@drawable/background_luckynumber_widget_dark"
+    android:gravity="center"
+    android:padding="10dp"
+    tools:context=".ui.modules.luckynumberwidget.LuckyNumberWidgetProvider">
+
+    <ImageView
+        android:id="@+id/luckyNumberWidgetImageTop"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_above="@id/luckyNumberWidgetNumber"
+        android:layout_centerHorizontal="true"
+        android:layout_marginBottom="20dp"
+        android:contentDescription="@string/lucky_number_title"
+        android:gravity="center"
+        android:src="@drawable/ic_widget_clover"
+        android:tint="@android:color/white"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <TextView
+        android:id="@+id/luckyNumberWidgetTitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="0dp"
+        android:gravity="center"
+        android:labelFor="@id/luckyNumberWidgetImageTop"
+        android:text="@string/lucky_number_title"
+        android:textAlignment="center"
+        android:textColor="@android:color/white"
+        android:textSize="22sp"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <ImageView
+        android:id="@+id/luckyNumberWidgetImageLeft"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignTop="@id/luckyNumberWidgetNumber"
+        android:contentDescription="@string/lucky_number_title"
+        android:src="@drawable/ic_widget_clover"
+        android:tint="@android:color/white"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <TextView
+        android:id="@+id/luckyNumberWidgetNumber"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@id/luckyNumberWidgetTitle"
+        android:layout_toEndOf="@id/luckyNumberWidgetImageLeft"
+        android:layout_toRightOf="@id/luckyNumberWidgetImageLeft"
+        android:gravity="center"
+        android:text="#"
+        android:textAlignment="center"
+        android:textColor="@android:color/white"
+        android:textSize="34sp"
+        tools:ignore="HardcodedText"
+        tools:text="13" />
+</RelativeLayout>
diff --git a/app/src/main/res/layout/widget_timetable.xml b/app/src/main/res/layout/widget_timetable.xml
index 3edcc2763..aa2269ad0 100644
--- a/app/src/main/res/layout/widget_timetable.xml
+++ b/app/src/main/res/layout/widget_timetable.xml
@@ -4,80 +4,87 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="@android:color/white"
-    tools:context=".ui.widgets.timetable.TimetableWidgetProvider">
+    tools:context=".ui.modules.timetablewidget.TimetableWidgetProvider">
 
     <RelativeLayout
         android:layout_width="match_parent"
-        android:layout_height="@dimen/timetable_widget_bar_height"
+        android:layout_height="56dp"
         android:background="@color/colorPrimary">
 
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_centerVertical="true"
+            android:layout_toStartOf="@id/timetableWidgetAccount"
+            android:layout_toLeftOf="@id/timetableWidgetAccount"
+            android:layout_toEndOf="@id/timetableWidgetNext"
+            android:layout_toRightOf="@id/timetableWidgetNext"
+            android:orientation="vertical">
+
+            <TextView
+                android:id="@+id/timetableWidgetDate"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="10dp"
+                android:layout_marginLeft="10dp"
+                android:maxLines="1"
+                android:textColor="@android:color/white"
+                android:textSize="15sp"
+                tools:text="Pon. 30.03.2019" />
+
+            <TextView
+                android:id="@+id/timetableWidgetName"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="10dp"
+                android:layout_marginLeft="10dp"
+                android:maxLines="1"
+                android:textColor="@android:color/white"
+                android:textSize="13sp"
+                tools:text="Jan Kowalski" />
+        </LinearLayout>
+
+        <ImageButton
+            android:id="@+id/timetableWidgetAccount"
+            android:layout_width="50dp"
+            android:layout_height="match_parent"
+            android:layout_alignParentEnd="true"
+            android:layout_alignParentRight="true"
+            android:background="?android:selectableItemBackground"
+            android:contentDescription="@string/account_title"
+            android:src="@drawable/ic_widget_account" />
+
         <ImageButton
             android:id="@+id/timetableWidgetPrev"
-            android:layout_width="70dp"
+            android:layout_width="50dp"
             android:layout_height="wrap_content"
             android:layout_centerVertical="true"
-            android:layout_marginStart="5dp"
-            android:layout_marginLeft="5dp"
+            android:layout_marginStart="10dp"
+            android:layout_marginLeft="10dp"
             android:backgroundTint="@color/colorPrimaryDark"
             android:contentDescription="@string/all_prev"
-            android:src="@drawable/ic_widget_chevron_24dp"
+            android:src="@drawable/ic_widget_chevron"
             tools:targetApi="lollipop" />
 
-        <TextView
-            android:id="@+id/timetableWidgetDay"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_alignTop="@+id/timetableWidgetPrev"
-            android:layout_centerHorizontal="true"
-            android:layout_toStartOf="@id/timetableWidgetNext"
-            android:layout_toLeftOf="@id/timetableWidgetNext"
-            android:layout_toEndOf="@id/timetableWidgetPrev"
-            android:layout_toRightOf="@id/timetableWidgetPrev"
-            android:gravity="center_horizontal"
-            android:maxLines="1"
-            android:textColor="@android:color/white"
-            android:textSize="15sp"
-            tools:text="Poniedziałek" />
-
-        <TextView
-            android:id="@+id/timetableWidgetDate"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_below="@id/timetableWidgetDay"
-            android:layout_centerInParent="true"
-            android:layout_marginTop="3dp"
-            android:layout_toStartOf="@id/timetableWidgetNext"
-            android:layout_toLeftOf="@id/timetableWidgetNext"
-            android:layout_toEndOf="@id/timetableWidgetPrev"
-            android:layout_toRightOf="@id/timetableWidgetPrev"
-            android:gravity="center_horizontal"
-            android:maxLines="1"
-            android:textColor="@android:color/white"
-            android:textSize="14sp"
-            tools:text="12.03.2019" />
-
         <ImageButton
             android:id="@+id/timetableWidgetNext"
-            android:layout_width="70dp"
+            android:layout_width="50dp"
             android:layout_height="wrap_content"
-            android:layout_alignParentEnd="true"
-            android:layout_alignParentRight="true"
             android:layout_centerVertical="true"
-            android:layout_marginEnd="5dp"
-            android:layout_marginRight="5dp"
+            android:layout_toEndOf="@id/timetableWidgetPrev"
+            android:layout_toRightOf="@id/timetableWidgetPrev"
             android:backgroundTint="@color/colorPrimaryDark"
             android:contentDescription="@string/all_next"
             android:rotation="180"
-            android:src="@drawable/ic_widget_chevron_24dp"
+            android:src="@drawable/ic_widget_chevron"
             tools:targetApi="lollipop" />
-
     </RelativeLayout>
 
     <ListView
         android:id="@+id/timetableWidgetList"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:layout_marginTop="@dimen/timetable_widget_bar_height"
+        android:layout_marginTop="56dp"
         tools:listitem="@layout/item_widget_timetable" />
 
     <TextView
diff --git a/app/src/main/res/layout/widget_timetable_dark.xml b/app/src/main/res/layout/widget_timetable_dark.xml
new file mode 100644
index 000000000..3a301eb94
--- /dev/null
+++ b/app/src/main/res/layout/widget_timetable_dark.xml
@@ -0,0 +1,99 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/colorWidgetBackground"
+    tools:context=".ui.modules.timetablewidget.TimetableWidgetProvider">
+
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="56dp"
+        android:background="@color/colorWidgetTopBar">
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_centerVertical="true"
+            android:layout_toStartOf="@id/timetableWidgetAccount"
+            android:layout_toLeftOf="@id/timetableWidgetAccount"
+            android:layout_toEndOf="@id/timetableWidgetNext"
+            android:layout_toRightOf="@id/timetableWidgetNext"
+            android:orientation="vertical">
+
+            <TextView
+                android:id="@+id/timetableWidgetDate"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="10dp"
+                android:layout_marginLeft="10dp"
+                android:maxLines="1"
+                android:textColor="@android:color/white"
+                android:textSize="15sp"
+                tools:text="Pon. 30.03.2019" />
+
+            <TextView
+                android:id="@+id/timetableWidgetName"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="10dp"
+                android:layout_marginLeft="10dp"
+                android:maxLines="1"
+                android:textColor="@android:color/white"
+                android:textSize="13sp"
+                tools:text="Jan Kowalski" />
+        </LinearLayout>
+
+        <ImageButton
+            android:id="@+id/timetableWidgetAccount"
+            android:layout_width="50dp"
+            android:layout_height="match_parent"
+            android:layout_alignParentEnd="true"
+            android:layout_alignParentRight="true"
+            android:background="?android:selectableItemBackground"
+            android:contentDescription="@string/account_title"
+            android:src="@drawable/ic_widget_account" />
+
+        <ImageButton
+            android:id="@+id/timetableWidgetPrev"
+            android:layout_width="50dp"
+            android:layout_height="wrap_content"
+            android:layout_centerVertical="true"
+            android:layout_marginStart="10dp"
+            android:layout_marginLeft="10dp"
+            android:backgroundTint="@color/colorWidgetNavButton"
+            android:contentDescription="@string/all_prev"
+            android:src="@drawable/ic_widget_chevron"
+            tools:targetApi="lollipop" />
+
+        <ImageButton
+            android:id="@+id/timetableWidgetNext"
+            android:layout_width="50dp"
+            android:layout_height="wrap_content"
+            android:layout_centerVertical="true"
+            android:layout_toEndOf="@id/timetableWidgetPrev"
+            android:layout_toRightOf="@id/timetableWidgetPrev"
+            android:backgroundTint="@color/colorWidgetNavButton"
+            android:contentDescription="@string/all_next"
+            android:rotation="180"
+            android:src="@drawable/ic_widget_chevron"
+            tools:targetApi="lollipop" />
+    </RelativeLayout>
+
+    <ListView
+        android:id="@+id/timetableWidgetList"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_marginTop="56dp"
+        tools:listitem="@layout/item_widget_timetable_dark" />
+
+    <TextView
+        android:id="@+id/timetableWidgetEmpty"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:text="@string/widget_timetable_no_items"
+        android:textColor="@android:color/white"
+        android:textSize="20sp"
+        tools:visibility="invisible" />
+</FrameLayout>
diff --git a/app/src/main/res/menu/action_menu_attendance.xml b/app/src/main/res/menu/action_menu_attendance.xml
index 94baf338c..bb20c8ec2 100644
--- a/app/src/main/res/menu/action_menu_attendance.xml
+++ b/app/src/main/res/menu/action_menu_attendance.xml
@@ -3,8 +3,9 @@
     xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/attendanceMenuSummary"
-        android:icon="@drawable/ic_menu_main_attendance_summary_24dp"
+        android:icon="@drawable/ic_menu_attendance_summary"
         android:orderInCategory="1"
         android:title="@string/attendance_summary_button"
+        app:iconTint="@color/material_on_surface_emphasis_medium"
         app:showAsAction="ifRoom" />
 </menu>
diff --git a/app/src/main/res/menu/action_menu_grade.xml b/app/src/main/res/menu/action_menu_grade.xml
index fdc1dbd01..6357cbb51 100644
--- a/app/src/main/res/menu/action_menu_grade.xml
+++ b/app/src/main/res/menu/action_menu_grade.xml
@@ -3,8 +3,9 @@
     xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/gradeMenuSemester"
-        android:icon="@drawable/ic_menu_grade_semester_24dp"
+        android:icon="@drawable/ic_menu_grade_semester"
         android:orderInCategory="1"
         android:title="@string/grade_switch_semester"
+        app:iconTint="@color/material_on_surface_emphasis_medium"
         app:showAsAction="ifRoom" />
 </menu>
diff --git a/app/src/main/res/menu/action_menu_grade_details.xml b/app/src/main/res/menu/action_menu_grade_details.xml
index 938908291..62516cbd7 100644
--- a/app/src/main/res/menu/action_menu_grade_details.xml
+++ b/app/src/main/res/menu/action_menu_grade_details.xml
@@ -3,7 +3,9 @@
     xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/gradeDetailsMenuRead"
+        android:enabled="false"
         android:orderInCategory="100"
         android:title="@string/grade_menu_read"
+        app:iconTint="@color/material_on_surface_emphasis_medium"
         app:showAsAction="never" />
 </menu>
diff --git a/app/src/main/res/menu/action_menu_main.xml b/app/src/main/res/menu/action_menu_main.xml
index 7acc58c12..72bea25a2 100644
--- a/app/src/main/res/menu/action_menu_main.xml
+++ b/app/src/main/res/menu/action_menu_main.xml
@@ -3,8 +3,9 @@
     xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/mainMenuAccount"
-        android:icon="@drawable/ic_all_account_24dp"
+        android:icon="@drawable/ic_all_account"
         android:orderInCategory="2"
         android:title="@string/main_account_picker"
+        app:iconTint="@color/material_on_surface_emphasis_medium"
         app:showAsAction="always" />
 </menu>
diff --git a/app/src/main/res/menu/action_menu_message_preview.xml b/app/src/main/res/menu/action_menu_message_preview.xml
index 4c2f59201..dfc12e234 100644
--- a/app/src/main/res/menu/action_menu_message_preview.xml
+++ b/app/src/main/res/menu/action_menu_message_preview.xml
@@ -3,8 +3,23 @@
     xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/messagePreviewMenuReply"
-        android:icon="@drawable/ic_message_reply_24dp"
+        android:icon="@drawable/ic_menu_message_reply"
         android:orderInCategory="1"
         android:title="@string/message_reply"
+        app:iconTint="@color/material_on_surface_emphasis_medium"
+        app:showAsAction="ifRoom" />
+    <item
+        android:id="@+id/messagePreviewMenuForward"
+        android:icon="@drawable/ic_menu_message_forward"
+        android:orderInCategory="1"
+        android:title="@string/message_forward"
+        app:iconTint="@color/material_on_surface_emphasis_medium"
+        app:showAsAction="ifRoom" />
+    <item
+        android:id="@+id/messagePreviewMenuDelete"
+        android:icon="@drawable/ic_menu_message_delete"
+        android:orderInCategory="1"
+        android:title="@string/message_delete"
+        app:iconTint="@color/material_on_surface_emphasis_medium"
         app:showAsAction="ifRoom" />
 </menu>
diff --git a/app/src/main/res/menu/action_menu_send_message.xml b/app/src/main/res/menu/action_menu_send_message.xml
index d512fc763..4b43764a8 100644
--- a/app/src/main/res/menu/action_menu_send_message.xml
+++ b/app/src/main/res/menu/action_menu_send_message.xml
@@ -3,8 +3,9 @@
     xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/sendMessageMenuSend"
-        android:icon="@drawable/ic_menu_send_message_24dp"
+        android:icon="@drawable/ic_menu_message_send"
         android:orderInCategory="1"
         android:title="@string/send_message_title"
+        app:iconTint="@color/material_on_surface_emphasis_medium"
         app:showAsAction="ifRoom" />
 </menu>
diff --git a/app/src/main/res/menu/action_menu_timetable.xml b/app/src/main/res/menu/action_menu_timetable.xml
index 0a13494ab..c3d0222c1 100644
--- a/app/src/main/res/menu/action_menu_timetable.xml
+++ b/app/src/main/res/menu/action_menu_timetable.xml
@@ -3,8 +3,9 @@
     xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/timetableMenuCompletedLessons"
-        android:icon="@drawable/ic_menu_main_lessons_completed_24dp"
+        android:icon="@drawable/ic_menu_timetable_lessons_completed"
         android:orderInCategory="1"
         android:title="@string/completed_lessons_button"
+        app:iconTint="@color/material_on_surface_emphasis_medium"
         app:showAsAction="ifRoom" />
 </menu>
diff --git a/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml b/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
index 7353dbd1f..d59ec8e17 100644
--- a/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
+++ b/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@color/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+    <background android:drawable="@color/colorPrimary" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
 </adaptive-icon>
\ No newline at end of file
diff --git a/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml b/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
index 7353dbd1f..d59ec8e17 100644
--- a/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
+++ b/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@color/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+    <background android:drawable="@color/colorPrimary" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
 </adaptive-icon>
\ No newline at end of file
diff --git a/app/src/main/res/values-night/styles.xml b/app/src/main/res/values-night/styles.xml
index 7eaf4e5ee..492645381 100644
--- a/app/src/main/res/values-night/styles.xml
+++ b/app/src/main/res/values-night/styles.xml
@@ -1,32 +1,19 @@
 <resources xmlns:tools="http://schemas.android.com/tools">
 
-    <style name="WulkanowyTheme" parent="@style/Theme.AppCompat.DayNight">
-        <item name="colorPrimary">@color/colorPrimary</item>
-        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
-        <item name="colorAccent">@color/colorPrimary</item>
-        <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>
-        <item name="bottomNavBackground">@color/bottom_nav_background</item>
-        <item name="android:navigationBarColor" tools:targetApi="21">@color/bottom_nav_background</item>
-        <item name="dividerColor">@color/divider_inverse</item>
-        <item name="chip_backgroundColor">@color/chip_backgroundColor_inverse</item>
-        <item name="chip_labelColor">@color/chip_labelColor_inverse</item>
-        <item name="chip_detailed_backgroundColor">@color/chip_backgroundColor_inverse</item>
-        <item name="filterable_list_backgroundColor">@color/filterable_list_backgroundColor_inverse</item>
-        <item name="filterable_list_textColor">@color/filterable_list_textColor_inverse</item>
-
-        <!--AboutLibraries specific values-->
-        <item name="about_libraries_window_background">@color/about_libraries_window_background_dark</item>
-        <item name="about_libraries_card">@color/about_libraries_card_dark</item>
-        <item name="about_libraries_title_openSource">@color/about_libraries_title_openSource_dark</item>
-        <item name="about_libraries_title_description">@color/about_libraries_title_openSource_dark</item>
-        <item name="about_libraries_text_openSource">@color/about_libraries_text_openSource_dark</item>
-        <item name="about_libraries_special_button_openSource">@color/about_libraries_special_button_openSource_dark</item>
-        <item name="about_libraries_dividerDark_openSource">@color/about_libraries_dividerDark_openSource_dark</item>
-        <item name="about_libraries_dividerLight_openSource">@color/about_libraries_dividerLight_openSource_dark</item>
+    <style name="WulkanowyTheme" parent="@style/Theme.MaterialComponents">
+        <item name="colorPrimary">@color/colorPrimaryLight</item>
+        <item name="colorSecondary">@color/colorPrimaryLight</item>
+        <item name="colorTimetableChange">@color/timetable_change_light</item>
+        <item name="colorError">@color/colorErrorLight</item>
+        <item name="colorDivider">@color/colorDividerInverse</item>
+        <item name="android:windowBackground">?colorSurface</item>
+        <item name="android:textColor">?android:textColorPrimary</item>
+        <item name="android:statusBarColor" tools:targetApi="lollipop">@android:color/black</item>
+        <item name="android:windowLightNavigationBar" tools:targetApi="o_mr1">false</item>
+        <item name="mdtp_theme_dark">true</item>
     </style>
 
-    <style name="WulkanowyTheme.NoActionBar" parent="WulkanowyTheme">
-        <item name="windowActionBar">false</item>
-        <item name="windowNoTitle">true</item>
+    <style name="WulkanowyTheme.Black" parent="WulkanowyTheme.NoActionBar">
+        <item name="colorSurface">@android:color/black</item>
     </style>
 </resources>
diff --git a/app/src/main/res/values-pl-v29/preferences_values.xml b/app/src/main/res/values-pl-v29/preferences_values.xml
new file mode 100644
index 000000000..57f208044
--- /dev/null
+++ b/app/src/main/res/values-pl-v29/preferences_values.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <string-array name="app_theme_entries" tools:ignore="InconsistentArrays">
+        <item>Motyw systemu</item>
+        <item>Jasny</item>
+        <item>Ciemny</item>
+        <item>Czarny (AMOLED)</item>
+    </string-array>
+</resources>
diff --git a/app/src/main/res/values-pl/value_prefernces.xml b/app/src/main/res/values-pl/preferences_values.xml
similarity index 51%
rename from app/src/main/res/values-pl/value_prefernces.xml
rename to app/src/main/res/values-pl/preferences_values.xml
index 2231cc0b1..33a66e0f7 100644
--- a/app/src/main/res/values-pl/value_prefernces.xml
+++ b/app/src/main/res/values-pl/preferences_values.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<resources>
+<resources xmlns:tools="http://schemas.android.com/tools">
     <string-array name="services_interval_entries">
         <item>15 minut</item>
         <item>30 minut</item>
@@ -7,18 +7,24 @@
         <item>2 godziny</item>
         <item>6 godzin</item>
         <item>12 godzin</item>
-        <item>24 godzin</item>
+        <item>24 godziny</item>
     </string-array>
 
-    <string-array name="theme_entries">
-        <item>Wyłączony</item>
-        <item>Włączony</item>
-        <item>Automatyczny</item>
-        <item>Używaj ustawień systemowych</item>
+    <string-array name="app_theme_entries" tools:ignore="InconsistentArrays">
+        <item>Jasny</item>
+        <item>Ciemny</item>
+        <item>Czarny (AMOLED)</item>
+    </string-array>
+
+    <string-array name="app_language_entries">
+        <item>Język systemu</item>
+        <item>Polski</item>
+        <item>English</item>
+        <item>Pусский</item>
     </string-array>
 
     <string-array name="grade_modifier_entries">
-        <item>Domyślna</item>
+        <item>0,0</item>
         <item>0,25</item>
         <item>0,33</item>
         <item>0,5</item>
@@ -30,4 +36,9 @@
         <item>Wulkanowy</item>
         <item>Kolory ocen w dzienniku</item>
     </string-array>
+
+    <string-array name="grade_average_mode_entries">
+        <item>Średnia ocen z 2 semestru</item>
+        <item>Średnia ocen z całego roku</item>
+    </string-array>
 </resources>
diff --git a/app/src/main/res/values-pl/strings.xml b/app/src/main/res/values-pl/strings.xml
index dcc735267..a000ad695 100644
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@@ -3,7 +3,7 @@
 
 
     <!--Activity/Fragment title-->
-    <string name="login_title">Wybierz ucznia</string>
+    <string name="login_title">Logowanie</string>
     <string name="main_title">Wulkanowy</string>
     <string name="grade_title">Oceny</string>
     <string name="attendance_title">Frekwencja</string>
@@ -12,6 +12,7 @@
     <string name="settings_title">Ustawienia</string>
     <string name="more_title">Więcej</string>
     <string name="about_title">O aplikacji</string>
+    <string name="license_title">Licencje</string>
     <string name="message_title">Wiadomości</string>
     <string name="send_message_title">Nowa wiadomość</string>
     <string name="note_title">Uwagi i osiągnięcia</string>
@@ -21,18 +22,35 @@
 
     <!--Login-->
     <string name="login_header_default">Zaloguj się za pomocą konta ucznia lub rodzica</string>
-    <string name="login_header_symbol">Podaj symbol dziennika VULCAN</string>
+    <string name="login_header_symbol">Podaj symbol</string>
     <string name="login_nickname_hint">Email lub nick</string>
     <string name="login_password_hint">Hasło</string>
     <string name="login_host_hint">Dziennik</string>
     <string name="login_symbol_hint">Symbol</string>
+    <string name="login_type_api">Mobilne API</string>
+    <string name="login_type_scrapper">Scraper</string>
+    <string name="login_type_hybrid">Hybrydowe</string>
+    <string name="login_token_hint">Token</string>
+    <string name="login_pin_hint">PIN</string>
+    <string name="login_api_key_hint">Klucz API</string>
     <string name="login_sign_in">Zaloguj</string>
     <string name="login_invalid_password">To hasło jest za krótkie</string>
     <string name="login_incorrect_password">Dane logowania są niepoprawne</string>
+    <string name="login_invalid_pin">Nieprawidłowy PIN</string>
+    <string name="login_invalid_token">Nieprawidłowy token</string>
+    <string name="login_expired_token">Token stracił ważność</string>
+    <string name="login_invalid_symbol">Niepoprawny symbol</string>
     <string name="login_incorrect_symbol">Nie znaleziono ucznia. Sprawdź symbol</string>
     <string name="login_field_required">To pole jest wymagane</string>
-    <string name="login_duplicate_student">Ten student jest już zalogowany</string>
-    <string name="login_symbol_helper">Symbol znajduje się na stronie dziennika w zakładce Dostęp Mobilny</string>
+    <string name="login_duplicate_student">Wybrany uczeń jest już zalogowany</string>
+    <string name="login_symbol_helper">Symbol znajdziesz na stronie dziennika w Uczeń -> Dostęp Mobilny -> Zarejestruj urządzenie mobilne</string>
+    <string name="login_select_student">Wybierz uczniów do zalogowania w aplikacji</string>
+    <string name="login_advanced">Inne opcje</string>
+    <string name="login_privacy_policy">Polityka prywatności</string>
+    <string name="login_contact_header">Problemy z logowaniem? Napisz do nas!</string>
+    <string name="login_contact_email">Email</string>
+    <string name="login_contact_discord">Discord</string>
+    <string name="login_email_intent_title">Wyślij email</string>
 
 
     <!--Main-->
@@ -55,6 +73,7 @@
     <string name="grade_no_average">Brak średniej</string>
     <string name="grade_predicted">Przewidywana: %1$s</string>
     <string name="grade_final">Końcowa: %1$s</string>
+    <string name="grade_summary_points">Suma punktów</string>
     <string name="grade_summary_final_grade">Ocena końcowa</string>
     <string name="grade_summary_predicted_grade">Przewidywana ocena</string>
     <string name="grade_summary_calculated_average">Obliczona średnia</string>
@@ -62,8 +81,9 @@
     <string name="grade_menu_summary">Podsumowanie</string>
     <string name="grade_menu_statistics">Klasa</string>
     <string name="grade_menu_read">Oznacz jako przeczytane</string>
-    <string name="grade_statistics_partial">Oceny cząstkowe</string>
-    <string name="grade_statistics_semester">Oceny semestralne</string>
+    <string name="grade_statistics_partial">Cząstkowe</string>
+    <string name="grade_statistics_semester">Semestralne</string>
+    <string name="grade_statistics_points">Punkty</string>
     <plurals name="grade_number_item">
         <item quantity="one">%d ocena</item>
         <item quantity="few">%d oceny</item>
@@ -74,6 +94,7 @@
         <item quantity="one">Nowa ocena</item>
         <item quantity="few">Nowe oceny</item>
         <item quantity="many">Nowe oceny</item>
+        <item quantity="other">Nowe oceny</item>
     </plurals>
     <plurals name="grade_notify_new_items">
         <item quantity="one">Dostałeś %1$d ocenę</item>
@@ -107,7 +128,7 @@
     <string name="attendance_absence_excused">Nieobecność usprawiedliwiona</string>
     <string name="attendance_absence_unexcused">Nieobecność nieusprawiedliwiona</string>
     <string name="attendance_exemption">Zwolniony</string>
-    <string name="attendance_excused_lateness">Spóźnienie usprawiedliowione</string>
+    <string name="attendance_excused_lateness">Spóźnienie usprawiedliwione</string>
     <string name="attendance_unexcused_lateness">Spóźnienie nieusprawiedliwione</string>
     <string name="attendance_present">Obecny</string>
     <string name="attendance_number">Numer lekcji</string>
@@ -116,6 +137,7 @@
         <item quantity="one">%1$d nieobecność</item>
         <item quantity="few">%1$d nieobecności</item>
         <item quantity="many">%1$d nieobecności</item>
+        <item quantity="other">%1$d nieobecności</item>
     </plurals>
 
 
@@ -140,6 +162,11 @@
     <string name="message_to">Do:</string>
     <string name="message_date">Data: %s</string>
     <string name="message_reply">Odpowiedz</string>
+    <string name="message_forward">Prześlij dalej</string>
+    <string name="message_delete">Usuń</string>
+    <string name="message_move_to_bin">Przenieś do kosza</string>
+    <string name="message_delete_forever">Usuń trwale</string>
+    <string name="message_delete_success">Wiadomość usunięta pomyślnie</string>
     <string name="message_subject">Temat</string>
     <string name="message_content">Treść</string>
     <string name="message_send_successful">Wiadomość wysłana pomyślnie</string>
@@ -149,16 +176,19 @@
         <item quantity="one">%d wiadomość</item>
         <item quantity="few">%d wiadomości</item>
         <item quantity="many">%d wiadomości</item>
+        <item quantity="other">%d wiadomości</item>
     </plurals>
     <plurals name="message_new_items">
         <item quantity="one">Nowa wiadomość</item>
         <item quantity="few">Nowe wiadomości</item>
         <item quantity="many">Nowe wiadomości</item>
+        <item quantity="other">Nowe wiadomości</item>
     </plurals>
     <plurals name="message_notify_new_items">
         <item quantity="one">Dostałeś %1$d wiadomość</item>
         <item quantity="few">"Dostałeś %1$d wiadomości</item>
         <item quantity="many">Dostałeś %1$d wiadomości</item>
+        <item quantity="other">Dostałeś %1$d wiadomości</item>
     </plurals>
 
 
@@ -173,8 +203,8 @@
     <plurals name="note_new_items">
         <item quantity="one">Nowa uwaga</item>
         <item quantity="few">Nowe uwagi</item>
-        <item quantity="many">Nowych uwag</item>
-        <item quantity="other">Nowych uwag</item>
+        <item quantity="many">Nowe uwagi</item>
+        <item quantity="other">Nowe uwagi</item>
     </plurals>
     <plurals name="note_notify_new_items">
         <item quantity="one">Dostałeś %1$d uwagę</item>
@@ -196,6 +226,39 @@
     <string name="lucky_number_notify_new_item">Dziś szczęśliwym numerkiem jest: %d</string>
 
 
+    <!--Mobile devices-->
+    <string name="mobile_devices_title">Dostęp mobilny</string>
+    <string name="mobile_devices_no_items">Brak urządzeń</string>
+    <string name="mobile_devices_unregister">Wyrejestruj</string>
+    <string name="mobile_device_removed">Urządzenie usunięte</string>
+    <string name="mobile_device_qr">Kod QR</string>
+    <string name="mobile_device_token">Token</string>
+    <string name="mobile_device_symbol">Symbol</string>
+    <string name="mobile_device_pin">PIN</string>
+
+
+    <!--School and teachers-->
+    <string name="schoolandteachers_title">Szkoła i nauczyciele</string>
+
+
+    <!--School-->
+    <string name="school_title">Szkoła</string>
+    <string name="school_no_info">Brak informacji o szkole</string>
+    <string name="school_name">Nazwa szkoły</string>
+    <string name="school_address">Adres szkoły</string>
+    <string name="school_telephone">Telefon</string>
+    <string name="school_headmaster">Imię i nazwisko dyrektora</string>
+    <string name="school_pedagogue">Imię i nazwisko pedagoga</string>
+    <string name="school_address_button">Pokaż na mpaie</string>
+    <string name="school_telephone_button">Zadzwoń</string>
+
+
+    <!--Teacher-->
+    <string name="teachers_title">Nauczyciele</string>
+    <string name="teacher_no_items">Brak informacji o nauczycielach</string>
+    <string name="teacher_no_subject">Brak przedmiotu</string>
+
+
     <!--Account-->
     <string name="account_add_new">Dodaj konto</string>
     <string name="account_logout">Wyloguj</string>
@@ -204,13 +267,28 @@
 
 
     <!--About-->
-    <string name="about_discord_invite">Discord</string>
+    <string name="about_version">Wersja aplikacji</string>
     <string name="about_feedback">Zgłoś błąd</string>
+    <string name="about_feedback_summary">Wyślij zgłoszenie o błędzie poprzez e-maila</string>
+    <string name="about_faq">FAQ</string>
+    <string name="about_faq_summary">Zobacz Najczęściej Zadawane Pytania</string>
+    <string name="about_discord">Serwer Discord</string>
+    <string name="about_discord_summary">Dołącz do społeczności Wulkanowego</string>
+    <string name="about_privacy">Polityka prywatności</string>
+    <string name="about_privacy_summary">Zasady zbierania danych osobowych</string>
     <string name="about_homepage">Strona domowa</string>
+    <string name="about_homepage_summary">Odwiedź stronę i pomóż rozwijać aplikację</string>
+    <string name="about_licenses">Licencje</string>
+    <string name="about_licenses_summary">Licencje użytych bibliotek w aplikacji</string>
+
+
+    <!--Licenses-->
+    <string name="license_dialog_title">Licencja</string>
 
 
     <!--Generic-->
     <string name="all_content">Treść</string>
+    <string name="all_retry">Ponów</string>
     <string name="all_description">Opis</string>
     <string name="all_no_description">Brak opisu</string>
     <string name="all_teacher">Nauczyciel</string>
@@ -228,18 +306,21 @@
 
     <!--Timetable Widget-->
     <string name="widget_timetable_no_items">Brak lekcji</string>
-    <string name="widget_timetable_today">Dziś</string>
-    <string name="widget_timetable_tomorrow">Jutro</string>
+    <string name="widget_timetable_theme_title">Wybierz motyw</string>
+    <string name="widget_timetable_theme_light">Jasny</string>
+    <string name="widget_timetable_theme_dark">Ciemny</string>
 
 
     <!--Preferences-->
     <string name="pref_view_header">Wygląd</string>
     <string name="pref_view_list">Domyślny widok</string>
-    <string name="pref_view_summary">Pokazuj podsumowanie w ocenach</string>
+    <string name="pref_view_grade_average_mode">Obliczanie średniej końcoworocznej</string>
+    <string name="pref_view_grade_average_force_calc">Wymuś obliczanie średniej przez aplikację</string>
     <string name="pref_view_present">Pokazuj obecność we frekwencji</string>
-    <string name="pref_view_theme_dark">Ciemny motyw (Beta)</string>
+    <string name="pref_view_app_theme">Motyw aplikacji</string>
     <string name="pref_view_expand_grade">Rozwiń oceny</string>
-    <string name="pref_grade_color_scheme">Schemat kolorów ocen</string>
+    <string name="pref_view_grade_color_scheme">Schemat kolorów ocen</string>
+    <string name="pref_view_app_language">Język aplikacji</string>
 
     <string name="pref_notify_header">Powiadomienia</string>
     <string name="pref_notify_switch">Pokazuj powiadomienia</string>
@@ -273,13 +354,15 @@
 
     <!--Others-->
     <string name="all_copied">Skopiowano</string>
+    <string name="all_undo">Cofnij</string>
 
 
     <!--Errors-->
     <string name="error_no_internet">Brak połączenia z internetem</string>
-    <string name="error_timeout">Zbyt długie oczekiwanie na połączenie</string>
+    <string name="error_timeout">Upłynął limit czasu na połączenie z dziennikiem</string>
     <string name="error_login_failed">Logowanie nie powiodło się. Spróbuj ponownie lub zrestartuj aplikację</string>
     <string name="error_service_unavailable">Dziennik jest niedostępny. Spróbuj ponownie później</string>
     <string name="error_unknown">Wystąpił nieoczekiwany błąd</string>
     <string name="error_feature_disabled">Funkcja wyłączona przez szkołę</string>
+    <string name="error_feature_not_available">Funkcja niedostępna w tym trybie</string>
 </resources>
diff --git a/app/src/main/res/values-ru-v29/preferences_values.xml b/app/src/main/res/values-ru-v29/preferences_values.xml
new file mode 100644
index 000000000..2d8606a84
--- /dev/null
+++ b/app/src/main/res/values-ru-v29/preferences_values.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <string-array name="app_theme_entries" tools:ignore="InconsistentArrays">
+        <item>Тема системы</item>
+        <item>Светлая</item>
+        <item>Тёмная</item>
+        <item>Тёмная (AMOLED)</item>
+    </string-array>
+</resources>
diff --git a/app/src/main/res/values-ru/preferences_values.xml b/app/src/main/res/values-ru/preferences_values.xml
new file mode 100644
index 000000000..641d754f8
--- /dev/null
+++ b/app/src/main/res/values-ru/preferences_values.xml
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <string-array name="services_interval_entries">
+        <item>15 минут</item>
+        <item>30 минут</item>
+        <item>1 час</item>
+        <item>2 часа</item>
+        <item>6 часов</item>
+        <item>12 часов</item>
+        <item>24 часа</item>
+    </string-array>
+    <string-array name="app_theme_entries" tools:ignore="InconsistentArrays">
+        <item>Светлая</item>
+        <item>Тёмная</item>
+        <item>Тёмная (AMOLED)</item>
+    </string-array>
+    <string-array name="app_language_entries">
+        <item>Язык системы</item>
+        <item>Polski</item>
+        <item>English</item>
+        <item>Pусский</item>
+    </string-array>
+    <string-array name="grade_modifier_entries">
+        <item>0,0</item>
+        <item>0,25</item>
+        <item>0,33</item>
+        <item>0,5</item>
+        <item>0,75</item>
+    </string-array>
+    <string-array name="grade_color_scheme_entries">
+        <item>Dzienniczek+</item>
+        <item>Wulkanowy</item>
+        <item>Цвета оценок в дневнике</item>
+    </string-array>
+    <string-array name="grade_average_mode_entries">
+        <item>Средняя оценка со 2 семестра</item>
+        <item>Средняя оценка с целого года</item>
+    </string-array>
+</resources>
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
new file mode 100644
index 000000000..53430b664
--- /dev/null
+++ b/app/src/main/res/values-ru/strings.xml
@@ -0,0 +1,368 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools">
+
+    <string name="app_name">Wulkanowy</string>
+
+
+    <!--Activity/Fragment title-->
+    <string name="login_title">Авторизация</string>
+    <string name="main_title">Wulkanowy</string>
+    <string name="grade_title">Оценки</string>
+    <string name="attendance_title">Посещаемость</string>
+    <string name="exam_title">Тесты</string>
+    <string name="timetable_title">Расписание</string>
+    <string name="settings_title">Настройки</string>
+    <string name="more_title">Ещё</string>
+    <string name="about_title">О приложении</string>
+    <string name="license_title">Лицензии</string>
+    <string name="message_title">Сообщения</string>
+    <string name="send_message_title">Новое сообщение</string>
+    <string name="note_title">Предупреждения и свершения</string>
+    <string name="homework_title">Домашние задания</string>
+    <string name="account_title">Выберите аккаунт</string>
+
+
+    <!--Login-->
+    <string name="login_header_default">Авторизируйтесь при помощи аккаунта ученика или родителя</string>
+    <string name="login_header_symbol">Впишите \"symbol\"</string>
+    <string name="login_nickname_hint">Электронная почта или имя пользователя</string>
+    <string name="login_password_hint">Пароль</string>
+    <string name="login_host_hint">Дневник</string>
+    <string name="login_type_api">Мобильный API</string>
+    <string name="login_type_scrapper">Scraper</string>
+    <string name="login_type_hybrid">Гибрид</string>
+    <string name="login_token_hint">Token</string>
+    <string name="login_pin_hint">PIN</string>
+    <string name="login_api_key_hint">клавиша API</string>
+    <string name="login_symbol_hint">Symbol</string>
+    <string name="login_sign_in">Войти</string>
+    <string name="login_invalid_password">Слишком короткий пароль</string>
+    <string name="login_incorrect_password">Указаны неверные данные</string>
+    <string name="login_invalid_pin">Недействительный PIN</string>
+    <string name="login_invalid_token">Недействительный token</string>
+    <string name="login_expired_token">Токен просрочен</string>
+    <string name="login_invalid_symbol">Недействительный symbol</string>
+    <string name="login_incorrect_symbol">Не удалось найти ученика. Пожалуйста, проверьте \"symbol\"</string>
+    <string name="login_field_required">Это поле обязательно</string>
+    <string name="login_duplicate_student">Данный ученик уже авторизован</string>
+    <string name="login_symbol_helper">Вы можете найти \"symbol\" в Uczeń -&gt; Dostęp Mobilny -&gt; Zarejestruj urządzenie mobilne</string>
+    <string name="login_select_student">Выберите учеников для авторизации в приложении</string>
+    <string name="login_advanced">Другие варианты</string>
+    <string name="login_privacy_policy">Политика приватности</string>
+    <string name="login_contact_header">Проблемы с авторизацией? Свяжитесь с нами!</string>
+    <string name="login_contact_email">Электронная почта</string>
+    <string name="login_contact_discord">Discord</string>
+    <string name="login_email_intent_title">Отправить письмо</string>
+
+
+    <!--Main-->
+    <string name="main_account_picker">Менеджер аккаунтов</string>
+    <string name="main_log_in">Войти</string>
+    <string name="main_session_expired">Сеанс истёк</string>
+    <string name="main_session_relogin">Сеанс истёк, пожалуйста, авторизируйтесь ещё раз</string>
+
+
+    <!--Grade-->
+    <string name="grade_header">Оценка</string>
+    <string name="grade_semester">Семестр %d</string>
+    <string name="grade_switch_semester">Сменить семестр</string>
+    <string name="grade_no_items">Оценки отсутствуют</string>
+    <string name="grade_weight">Вес</string>
+    <string name="grade_comment">Комментарий</string>
+    <string name="grade_no_new_items">Новые оценки отсутствуют</string>
+    <string name="grade_number_new_items">Количество новых оценок: %1$d</string>
+    <string name="grade_average">Средняя оценка: %1$.2f</string>
+    <string name="grade_no_average">Средняя оценка отсутствует</string>
+    <string name="grade_predicted">Ожидаемая оценка: %1$s</string>
+    <string name="grade_final">Итоговая оценка: %1$s</string>
+    <string name="grade_summary_points">Сумма очков</string>
+    <string name="grade_summary_final_grade">Итоговая оценка</string>
+    <string name="grade_summary_predicted_grade">Ожидаемая оценка</string>
+    <string name="grade_summary_calculated_average">Рассчитанная средняя оценка</string>
+    <string name="grade_summary_final_average">Итоговая средняя оценка</string>
+    <string name="grade_menu_summary">Итоги</string>
+    <string name="grade_menu_statistics">Класс</string>
+    <string name="grade_menu_read">Пометить как \"прочитанное*</string>
+    <string name="grade_statistics_partial">Частичные</string>
+    <string name="grade_statistics_semester">Семестровые</string>
+    <string name="grade_statistics_points">Очки</string>
+    <plurals name="grade_number_item">
+        <item quantity="one">%d оценка</item>
+        <item quantity="few">%d оценки</item>
+        <item quantity="many">%d оценок</item>
+        <item quantity="other">%d оценок</item>
+    </plurals>
+    <plurals name="grade_new_items">
+        <item quantity="one" tools:ignore="ImpliedQuantity">Новая оценка</item>
+        <item quantity="few">Новые оценки</item>
+        <item quantity="many">Новые оценки</item>
+        <item quantity="other">Новые оценки</item>
+    </plurals>
+    <plurals name="grade_notify_new_items">
+        <item quantity="one">Вы получили %1$d оценку</item>
+        <item quantity="few">Вы получили %1$d оценки</item>
+        <item quantity="many">Вы получили %1$d оценок</item>
+        <item quantity="other">Вы получили %1$d оценок</item>
+    </plurals>
+
+
+    <!--Timetable-->
+    <string name="timetable_lesson">Урок</string>
+    <string name="timetable_room">Аудитория</string>
+    <string name="timetable_group">Группа</string>
+    <string name="timetable_time">Часы</string>
+    <string name="timetable_changes">Изменения</string>
+    <string name="timetable_no_items">Нету уроков в данный день</string>
+
+
+    <!--CompletedLesson-->
+    <string name="completed_lessons_title">Проведённые уроки</string>
+    <string name="completed_lessons_button">Просмотреть проведённые уроки</string>
+    <string name="completed_lessons_no_items">Нет информации о проведённых уроках</string>
+    <string name="completed_lessons_topic">Тема</string>
+    <string name="completed_lessons_absence">Отсутствие</string>
+    <string name="completed_lessons_resources">Ресурсы</string>
+
+
+    <!--Attendance-->
+    <string name="attendance_summary_button">Итоговая посещаемость</string>
+    <string name="attendance_absence_school">Отсутствие по школьным причинам</string>
+    <string name="attendance_absence_excused">Оправданное отсутствие</string>
+    <string name="attendance_absence_unexcused">Неоправданное отсутствие</string>
+    <string name="attendance_exemption">Освобождение</string>
+    <string name="attendance_excused_lateness">Оправданное опоздание</string>
+    <string name="attendance_unexcused_lateness">Неоправданное опоздание</string>
+    <string name="attendance_present">Присутствие</string>
+    <string name="attendance_number">Урок №</string>
+    <string name="attendance_no_items">Данные не найдены</string>
+    <plurals name="attendance_number_absences">
+        <item quantity="one">%1$d отсутствие</item>
+        <item quantity="few">%1$d отсутствия</item>
+        <item quantity="many">%1$d отсутствий</item>
+        <item quantity="other">%1$d отсутствий</item>
+    </plurals>
+
+
+    <!--Attendance summary-->
+    <string name="attendance_summary_final">Посещаемость</string>
+
+
+    <!--Exam-->
+    <string name="exam_no_items">Тесты на этой неделе не запланированы</string>
+    <string name="exam_type">Тип</string>
+    <string name="exam_entry_date">Дата записи</string>
+
+
+    <!--Message-->
+    <string name="message_inbox">Полученные</string>
+    <string name="message_sent">Отправленные</string>
+    <string name="message_trash">Корзина</string>
+    <string name="message_no_subject">(нету темы)</string>
+    <string name="message_no_items">Нет сообщений</string>
+    <string name="message_preview_error">Произошла ошибка во время получения текста сообщения</string>
+    <string name="message_from">От:</string>
+    <string name="message_to">Кому:</string>
+    <string name="message_date">Дата: %s</string>
+    <string name="message_reply">Ответ</string>
+    <string name="message_forward">Переслать</string>
+    <string name="message_delete">Удалить</string>
+    <string name="message_move_to_bin">Перенести в корзину</string>
+    <string name="message_delete_forever">Удалить навсегда</string>
+    <string name="message_delete_success">Сообщение успешно удалено</string>
+    <string name="message_subject">Тема</string>
+    <string name="message_content">Текст</string>
+    <string name="message_send_successful">Сообщение успешно отправлено</string>
+    <string name="message_required_recipients">Вы должны выбрать как минимум одного получателя</string>
+    <string name="message_content_min_length">Текст сообщения должен содержать как минимум 3 знака</string>
+    <plurals name="message_number_item">
+        <item quantity="one">%d сообщение</item>
+        <item quantity="few">%d сообщения</item>
+        <item quantity="many">%d сообщений</item>
+        <item quantity="other">%d сообщений</item>
+    </plurals>
+    <plurals name="message_new_items">
+        <item quantity="one" tools:ignore="ImpliedQuantity">Новое сообщение</item>
+        <item quantity="few">Новые сообщения</item>
+        <item quantity="many">Новые сообщения</item>
+        <item quantity="other">Новые сообщения</item>
+    </plurals>
+    <plurals name="message_notify_new_items">
+        <item quantity="one">Вы получили %1$d новое сообщение</item>
+        <item quantity="few">Вы получили %1$d новых сообщения</item>
+        <item quantity="many">Вы получили %1$d новых сообщений</item>
+        <item quantity="other">Вы получили %1$d новых сообщений</item>
+    </plurals>
+
+
+    <!--Note-->
+    <string name="note_no_items">Нет данных о предупреждениях</string>
+    <plurals name="note_number_item">
+        <item quantity="one">%d предупреждение</item>
+        <item quantity="few">%d предупреждения</item>
+        <item quantity="many">%d предупреждений</item>
+        <item quantity="other">%d предупреждений</item>
+    </plurals>
+    <plurals name="note_new_items">
+        <item quantity="one" tools:ignore="ImpliedQuantity">Новое предупреждение</item>
+        <item quantity="few">Новые предупреждения</item>
+        <item quantity="many">Новых предупреждений</item>
+        <item quantity="other">Новых предупреждений</item>
+    </plurals>
+    <plurals name="note_notify_new_items">
+        <item quantity="one">Вы получили %1$d предупреждение</item>
+        <item quantity="few">Вы получили %1$d предупреждения</item>
+        <item quantity="many">Вы получили %1$d предупреждений</item>
+        <item quantity="other">Вы получили %1$d предупреждений</item>
+    </plurals>
+
+
+    <!--Homework-->
+    <string name="homework_no_items">Нет домашних заданий</string>
+
+
+    <!--Lucky number-->
+    <string name="lucky_number_title">Счастливый номер</string>
+    <string name="lucky_number_header">Сегодняшний счастливый номер</string>
+    <string name="lucky_number_empty">Нет данных о счастливом номере</string>
+    <string name="lucky_number_notify_new_item_title">Сегодняшний счастливый номер</string>
+    <string name="lucky_number_notify_new_item">Сегодняшний счастливый номер: %d</string>
+
+
+    <!--Mobile devices-->
+    <string name="mobile_devices_title">Мобильные устройства</string>
+    <string name="mobile_devices_no_items">Нет устройств</string>
+    <string name="mobile_devices_unregister">Удалить</string>
+    <string name="mobile_device_removed">Устройство удалено</string>
+    <string name="mobile_device_qr">QR-код</string>
+    <string name="mobile_device_token">Token</string>
+    <string name="mobile_device_symbol">Symbol</string>
+    <string name="mobile_device_pin">PIN</string>
+
+
+    <!--School and teachers-->
+    <string name="schoolandteachers_title">Школа и учителя</string>
+
+
+    <!--School-->
+    <string name="school_title">Школа</string>
+    <string name="school_no_info">Нет информации о школе</string>
+    <string name="school_name">Название школы</string>
+    <string name="school_address">Адрес школы</string>
+    <string name="school_telephone">Телефон</string>
+    <string name="school_headmaster">Директор</string>
+    <string name="school_pedagogue">Педагог</string>
+    <string name="school_address_button">Показать на карте</string>
+    <string name="school_telephone_button">Позвонить</string>
+
+
+    <!--Teacher-->
+    <string name="teachers_title">Учителя</string>
+    <string name="teacher_no_items">Нет информации о учителях</string>
+    <string name="teacher_no_subject">Нет предмета</string>
+
+
+    <!--Account-->
+    <string name="account_add_new">Добавить аккаунт</string>
+    <string name="account_logout">Выйти</string>
+    <string name="account_confirm">Вы точно хотите выйти из данного аккаунта?</string>
+    <string name="account_logout_student">Выйти</string>
+
+
+    <!--About-->
+    <string name="about_version">Версия приложения</string>
+    <string name="about_feedback">Сообщить о ошибке</string>
+    <string name="about_feedback_summary">Отправить сообщение о ошибке через электронную почту</string>
+    <string name="about_faq">FAQ</string>
+    <string name="about_faq_summary">Читайте часто задаваемые вопросы</string>
+    <string name="about_discord">Сервер Discord</string>
+    <string name="about_discord_summary">Присоединиться к сообществу приложения</string>
+    <string name="about_privacy">Политика приватности</string>
+    <string name="about_privacy_summary">Правила сбора личных данных</string>
+    <string name="about_homepage">Домашняя страница</string>
+    <string name="about_homepage_summary">Посетить страницу и помочь в развитии приложения</string>
+    <string name="about_licenses">Лицензии</string>
+    <string name="about_licenses_summary">Лицензии использованных в приложении библиотек</string>
+
+
+    <!--Licenses-->
+    <string name="license_dialog_title">Лицензия</string>
+
+
+    <!--Generic-->
+    <string name="all_content">Содержание</string>
+    <string name="all_retry">Снова</string>
+    <string name="all_description">Описание</string>
+    <string name="all_no_description">Нет описания</string>
+    <string name="all_teacher">Учитель</string>
+    <string name="all_date">Дата</string>
+    <string name="all_entry_date">Дата записи</string>
+    <string name="all_color">Цвет</string>
+    <string name="all_details">Детали</string>
+    <string name="all_category">Категория</string>
+    <string name="all_close">Закрыть</string>
+    <string name="all_no_data">Нет данных</string>
+    <string name="all_subject">Предмет</string>
+    <string name="all_prev">Предыдущий</string>
+    <string name="all_next">Следующий</string>
+
+
+    <!--Timetable Widget-->
+    <string name="widget_timetable_no_items">Нет уроков</string>
+    <string name="widget_timetable_theme_title">Выбрать тему</string>
+    <string name="widget_timetable_theme_light">Светлая</string>
+    <string name="widget_timetable_theme_dark">Тёмная</string>
+
+
+    <!--Preferences-->
+    <string name="pref_view_header">Внешний вид</string>
+    <string name="pref_view_list">При входе открывать</string>
+    <string name="pref_view_grade_average_mode">Рассчитывание средней годовой оценки</string>
+    <string name="pref_view_grade_average_force_calc">Принудительно высчитать среднюю оценку через приложение</string>
+    <string name="pref_view_present">Показывать присутствия в посещаемости</string>
+    <string name="pref_view_app_theme">Тема приложения</string>
+    <string name="pref_view_expand_grade">Больше оценок</string>
+    <string name="pref_view_grade_color_scheme">Схема цветов оценок</string>
+    <string name="pref_view_app_language">Язык приложения</string>
+    <string name="pref_notify_header">Уведомления</string>
+    <string name="pref_notify_switch">Показывать уведомления</string>
+    <string name="pref_notify_debug_switch">Показывать дебаг-уведомления</string>
+    <string name="pref_services_header">Синхронизация</string>
+    <string name="pref_services_switch">Автоматическая синхронизация</string>
+    <string name="pref_services_suspended">Приостановить синхронизации во время каникул</string>
+    <string name="pref_services_interval">Интервал синхронизации</string>
+    <string name="pref_services_wifi">Только через Wi-Fi</string>
+    <string name="pref_other_header">Другие</string>
+    <string name="pref_other_grade_modifier_plus">Вес плюса</string>
+    <string name="pref_other_grade_modifier_minus">Вес минуса</string>
+    <string name="pref_other_fill_message_content">Ответить с историей сообщений</string>
+
+
+    <!--Notification Channels-->
+    <string name="channel_new_entries">Новые данные в дневнике</string>
+    <string name="channel_debug">Дебаг</string>
+
+
+    <!--Colors-->
+    <string name="all_black">Чёрный</string>
+    <string name="all_red">Красный</string>
+    <string name="all_blue">Голубой</string>
+    <string name="all_green">Зелёный</string>
+    <string name="all_purple">Фиолетовый</string>
+    <string name="all_empty_color">Нет цвета</string>
+
+
+    <!--Others-->
+    <string name="all_copied">Скопировано</string>
+    <string name="all_undo">Отменить</string>
+
+
+    <!--Errors-->
+    <string name="error_no_internet">Нет интернет-подключения</string>
+    <string name="error_timeout">Слишком долгое ожидание соединения с дневником</string>
+    <string name="error_login_failed">Авторизация не удалась. Пожалуйста, попробуйте ещё раз или перезапустите дневник</string>
+    <string name="error_service_unavailable">Дневник недоступен. Попробуйте позже</string>
+    <string name="error_unknown">Произошла неожиданная ошибка</string>
+    <string name="error_feature_disabled">Функция была выключена школой</string>
+    <string name="error_feature_not_available">Функция не доступна в этом режиме</string>
+
+</resources>
diff --git a/app/src/main/res/values-v21/styles.xml b/app/src/main/res/values-v21/styles.xml
new file mode 100644
index 000000000..6b7c7890c
--- /dev/null
+++ b/app/src/main/res/values-v21/styles.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="WulkanowyTheme" parent="BaseWulkanowyTheme">
+        <item name="android:statusBarColor">@android:color/darker_gray</item>
+    </style>
+
+    <style name="WulkanowyTheme.SplashScreen" parent="WulkanowyTheme.NoActionBar">
+        <item name="android:windowBackground">@drawable/layer_splash_background</item>
+        <item name="android:statusBarColor">@color/colorPrimaryDark</item>
+        <item name="android:navigationBarColor">@color/colorPrimaryDark</item>
+    </style>
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-v27/styles.xml b/app/src/main/res/values-v27/styles.xml
new file mode 100644
index 000000000..d33f64228
--- /dev/null
+++ b/app/src/main/res/values-v27/styles.xml
@@ -0,0 +1,15 @@
+<resources>
+
+    <style name="WulkanowyTheme" parent="BaseWulkanowyTheme">
+        <item name="android:statusBarColor">@android:color/darker_gray</item>
+        <item name="android:navigationBarColor">@android:color/white</item>
+        <item name="android:windowLightNavigationBar">true</item>
+    </style>
+
+    <style name="WulkanowyTheme.SplashScreen" parent="WulkanowyTheme.NoActionBar">
+        <item name="android:windowBackground">@drawable/layer_splash_background</item>
+        <item name="android:statusBarColor">@color/colorPrimaryDark</item>
+        <item name="android:navigationBarColor">@color/colorPrimaryDark</item>
+        <item name="android:windowLightNavigationBar">false</item>
+    </style>
+</resources>
diff --git a/app/src/main/res/values-v29/preferences_defaults.xml b/app/src/main/res/values-v29/preferences_defaults.xml
new file mode 100644
index 000000000..bb573d664
--- /dev/null
+++ b/app/src/main/res/values-v29/preferences_defaults.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools" tools:ignore="MissingTranslation">
+    <string name="pref_default_app_theme">system</string>
+</resources>
diff --git a/app/src/main/res/values-v29/preferences_values.xml b/app/src/main/res/values-v29/preferences_values.xml
new file mode 100644
index 000000000..f27c1c69c
--- /dev/null
+++ b/app/src/main/res/values-v29/preferences_values.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <string-array name="app_theme_entries" tools:ignore="InconsistentArrays">
+        <item>System theme</item>
+        <item>Light</item>
+        <item>Dark</item>
+        <item>Black (AMOLED)</item>
+    </string-array>
+    <string-array name="app_theme_values" translatable="false" tools:ignore="InconsistentArrays">
+        <item>system</item>
+        <item>light</item>
+        <item>dark</item>
+        <item>black</item>
+    </string-array>
+</resources>
diff --git a/app/src/main/res/values/api_endpoints.xml b/app/src/main/res/values/api_hosts.xml
similarity index 75%
rename from app/src/main/res/values/api_endpoints.xml
rename to app/src/main/res/values/api_hosts.xml
index ff8cd23ca..df42f592b 100644
--- a/app/src/main/res/values/api_endpoints.xml
+++ b/app/src/main/res/values/api_hosts.xml
@@ -1,19 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources xmlns:tools="http://schemas.android.com/tools" tools:ignore="MissingTranslation">
-    <string-array name="endpoints_keys">
+    <string-array name="hosts_keys">
         <item>Vulcan</item>
         <item>Opolska eSzkoła</item>
         <item>Gdańska Platforma Edukacyjna</item>
+        <item>Lubelski Portal Oświatowy</item>
         <item>EduNet Miasta Tarnowa</item>
         <item>ResMan Rzeszów</item>
         <item>Fakelog</item>
     </string-array>
-    <string-array name="endpoints_values">
+    <string-array name="hosts_values">
         <item>https://vulcan.net.pl</item>
         <item>https://eszkola.opolskie.pl</item>
         <item>https://edu.gdansk.pl</item>
+        <item>https://edu.lublin.eu</item>
         <item>https://umt.tarnow.pl</item>
         <item>https://resman.pl</item>
-        <item>https://fakelog.cf</item>
+        <item>http://fakelog.cf</item>
     </string-array>
 </resources>
diff --git a/app/src/main/res/values/attrs.xml b/app/src/main/res/values/attrs.xml
index eef7eab48..49cdd5b7e 100644
--- a/app/src/main/res/values/attrs.xml
+++ b/app/src/main/res/values/attrs.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <attr name="bottomNavBackground" format="reference" />
-    <attr name="dividerColor" format="reference" />
+    <attr name="colorDivider" format="color" />
+    <attr name="colorTimetableChange" format="color" />
 </resources>
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index 498549553..6221ef99b 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -1,24 +1,29 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <color name="colorPrimary">#d32f2f</color>
+    <color name="colorPrimaryLight">#e57373</color>
     <color name="colorPrimaryDark">#9a0007</color>
-    <color name="colorPrimaryLight">#ff6659</color>
-    <color name="colorBackgroundBottomNav">#f0f0f0</color>
+    <color name="colorError">#ff5722</color>
+    <color name="colorErrorLight">#e84853</color>
 
-    <color name="grade_text">#ffffff</color>
+    <color name="timetable_change_light">#ffd54f</color>
+    <color name="timetable_change_dark">#ff8f00</color>
+
+    <color name="colorDivider">#1f000000</color>
+    <color name="colorDividerInverse">#1fffffff</color>
 
     <color name="grade_black">#424242</color>
-    <color name="grade_red">#F44336</color>
-    <color name="grade_blue">#2196F3</color>
-    <color name="grade_green">#8BC34A</color>
-    <color name="grade_purple">#7E57C2</color>
+    <color name="grade_red">#d43f3f</color>
+    <color name="grade_blue">#49a6f2</color>
+    <color name="grade_green">#a0c431</color>
+    <color name="grade_purple">#8b6bc2</color>
 
-    <color name="grade_material_six">#03a9f4</color>
+    <color name="grade_material_six">#3dbbf5</color>
     <color name="grade_material_five">#4caf50</color>
-    <color name="grade_material_four">#92c400</color>
-    <color name="grade_material_three">#ffa000</color>
-    <color name="grade_material_two">#ff5722</color>
-    <color name="grade_material_one">#d32f2f</color>
+    <color name="grade_material_four">#a0c431</color>
+    <color name="grade_material_three">#ffb940</color>
+    <color name="grade_material_two">#ff774d</color>
+    <color name="grade_material_one">#d43f3f</color>
     <color name="grade_material_default">#607d8b</color>
 
     <color name="grade_vulcan_six">#91b43c</color>
@@ -29,15 +34,10 @@
     <color name="grade_vulcan_one">#d65757</color>
     <color name="grade_vulcan_default">#3d5f9c</color>
 
-    <color name="bottom_nav_background">#303030</color>
-    <color name="bottom_nav_background_inverse">#ffffff</color>
 
-    <color name="chip_backgroundColor_inverse">#595959</color>
-    <color name="chip_labelColor_inverse">#fefefe</color>
-    <color name="chip_detailed_backgroundColor">#fefefe</color>
-    <color name="filterable_list_backgroundColor_inverse">#393939</color>
-    <color name="filterable_list_textColor_inverse">#fefefe</color>
+    <!--Dark color resource for app widgets-->
 
-    <color name="divider">#cccccc</color>
-    <color name="divider_inverse">#777777</color>
+    <color name="colorWidgetBackground">#121212</color>
+    <color name="colorWidgetTopBar">#272727</color>
+    <color name="colorWidgetNavButton">#383838</color>
 </resources>
diff --git a/app/src/main/res/values/dimens.xml b/app/src/main/res/values/dimens.xml
index e0708095e..a4bf80ed6 100644
--- a/app/src/main/res/values/dimens.xml
+++ b/app/src/main/res/values/dimens.xml
@@ -2,7 +2,4 @@
     <!--BottomNav-->
     <dimen name="bottom_navigation_margin_top_active" tools:override="true">8dp</dimen>
     <dimen name="bottom_navigation_margin_top_inactive" tools:override="true">8dp</dimen>
-
-    <!--Timetable Widget-->
-    <dimen name="timetable_widget_bar_height">60dp</dimen>
 </resources>
diff --git a/app/src/main/res/values/ic_launcher_background.xml b/app/src/main/res/values/ic_launcher_background.xml
deleted file mode 100644
index 9646c0b4e..000000000
--- a/app/src/main/res/values/ic_launcher_background.xml
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <color name="ic_launcher_background">#D32F2F</color>
-</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/preferences_defaults.xml b/app/src/main/res/values/preferences_defaults.xml
new file mode 100644
index 000000000..91b357d93
--- /dev/null
+++ b/app/src/main/res/values/preferences_defaults.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools" tools:ignore="MissingTranslation">
+    <string name="pref_default_startup">0</string>
+    <bool name="pref_default_attendance_present">true</bool>
+    <string name="pref_default_grade_average_mode">only_one_semester</string>
+    <bool name="pref_default_grade_average_force_calc">false</bool>
+    <bool name="pref_default_expand_grade">false</bool>
+    <string name="pref_default_app_theme">light</string>
+    <string name="pref_default_grade_color_scheme">vulcan</string>
+    <string name="pref_default_app_language">system</string>
+    <bool name="pref_default_services_enable">true</bool>
+    <string name="pref_default_services_interval">60</string>
+    <bool name="pref_default_services_wifi_only">false</bool>
+    <bool name="pref_default_notifications_enable">true</bool>
+    <bool name="pref_default_notification_debug">false</bool>
+    <string name="pref_default_grade_modifier_plus">0.33</string>
+    <string name="pref_default_grade_modifier_minus">0.33</string>
+    <bool name="pref_default_fill_message_content">true</bool>
+</resources>
diff --git a/app/src/main/res/values/preferences_keys.xml b/app/src/main/res/values/preferences_keys.xml
index 427cca56b..a2172db96 100644
--- a/app/src/main/res/values/preferences_keys.xml
+++ b/app/src/main/res/values/preferences_keys.xml
@@ -2,9 +2,12 @@
 <resources xmlns:tools="http://schemas.android.com/tools" tools:ignore="MissingTranslation">
     <string name="pref_key_start_menu">start_menu</string>
     <string name="pref_key_attendance_present">attendance_present</string>
-    <string name="pref_key_theme">theme</string>
+    <string name="pref_key_app_theme">app_theme</string>
     <string name="pref_key_grade_color_scheme">grade_color_scheme</string>
     <string name="pref_key_expand_grade">expand_grade</string>
+    <string name="pref_key_grade_average_mode">grade_average_mode</string>
+    <string name="pref_key_grade_average_force_calc">grade_average_always_calc</string>
+    <string name="pref_key_app_language">app_language</string>
     <string name="pref_key_services_enable">services_enable</string>
     <string name="pref_key_services_interval">services_interval</string>
     <string name="pref_key_services_wifi_only">services_disable_wifi_only</string>
diff --git a/app/src/main/res/values/value_prefernces.xml b/app/src/main/res/values/preferences_values.xml
similarity index 60%
rename from app/src/main/res/values/value_prefernces.xml
rename to app/src/main/res/values/preferences_values.xml
index 661615e14..ee54d53c6 100644
--- a/app/src/main/res/values/value_prefernces.xml
+++ b/app/src/main/res/values/preferences_values.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<resources>
+<resources xmlns:tools="http://schemas.android.com/tools">
     <string-array name="startup_tab_entries" translatable="false">
         <item>@string/grade_title</item>
         <item>@string/attendance_title</item>
@@ -13,17 +13,28 @@
         <item>3</item>
     </string-array>
 
-    <string-array name="theme_entries">
-        <item>Off</item>
-        <item>On</item>
-        <item>Auto</item>
-        <item>Follow system settings</item>
+    <string-array name="app_theme_entries" tools:ignore="InconsistentArrays">
+        <item>Light</item>
+        <item>Dark</item>
+        <item>Black (AMOLED)</item>
     </string-array>
-    <string-array name="theme_values" translatable="false">
-        <item>1</item>
-        <item>2</item>
-        <item>0</item>
-        <item>-1</item>
+    <string-array name="app_theme_values" translatable="false" tools:ignore="InconsistentArrays">
+        <item>light</item>
+        <item>dark</item>
+        <item>black</item>
+    </string-array>
+
+    <string-array name="app_language_entries">
+        <item>System language</item>
+        <item>Polski</item>
+        <item>English</item>
+        <item>Pусский</item>
+    </string-array>
+    <string-array name="app_language_values" translatable="false">
+        <item>system</item>
+        <item>pl</item>
+        <item>en</item>
+        <item>ru</item>
     </string-array>
 
     <string-array name="services_interval_entries">
@@ -46,7 +57,7 @@
     </string-array>
 
     <string-array name="grade_modifier_entries">
-        <item>Default</item>
+        <item>0,00</item>
         <item>0,25</item>
         <item>0,33</item>
         <item>0,5</item>
@@ -70,4 +81,13 @@
         <item>material</item>
         <item>grade_color</item>
     </string-array>
+
+    <string-array name="grade_average_mode_entries">
+        <item>Average of grades only from the 2nd semester</item>
+        <item>Average of grades from the whole year</item>
+    </string-array>
+    <string-array name="grade_average_mode_values" translatable="false">
+        <item>only_one_semester</item>
+        <item>all_year</item>
+    </string-array>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 1debed7b3..72b9a5d4f 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -3,7 +3,7 @@
 
 
     <!--Activity/Fragment title-->
-    <string name="login_title">Select student</string>
+    <string name="login_title">Login</string>
     <string name="main_title">Wulkanowy</string>
     <string name="grade_title">Grades</string>
     <string name="attendance_title">Attendance</string>
@@ -12,6 +12,7 @@
     <string name="settings_title">Settings</string>
     <string name="more_title">More</string>
     <string name="about_title">About</string>
+    <string name="license_title">Licenses</string>
     <string name="message_title">Messages</string>
     <string name="send_message_title">New message</string>
     <string name="note_title">Notes and achievements</string>
@@ -21,18 +22,37 @@
 
     <!--Login-->
     <string name="login_header_default">Sign in with the student or parent account</string>
-    <string name="login_header_symbol">Enter the VULCAN diary symbol</string>
+    <string name="login_header_symbol">Enter the symbol</string>
     <string name="login_nickname_hint">Email or nick</string>
     <string name="login_password_hint">Password</string>
     <string name="login_host_hint">Register</string>
+    <string name="login_type_api">Mobile API</string>
+    <string name="login_type_scrapper">Scraper</string>
+    <string name="login_type_hybrid">Hybrid</string>
+    <string name="login_token_hint">Token</string>
+    <string name="login_pin_hint">PIN</string>
+    <string name="login_api_key_hint">API key</string>
     <string name="login_symbol_hint">Symbol</string>
     <string name="login_sign_in">Sign in</string>
-    <string name="login_invalid_password">This password is too short</string>
+    <string name="login_invalid_password">Password too short</string>
     <string name="login_incorrect_password">Login details are incorrect</string>
+    <string name="login_invalid_pin">Invalid PIN</string>
+    <string name="login_invalid_token">Invalid token</string>
+    <string name="login_expired_token">Token expired</string>
+    <string name="login_invalid_symbol">Invalid symbol</string>
     <string name="login_incorrect_symbol">Student not found. Check the symbol</string>
     <string name="login_field_required">This field is required</string>
-    <string name="login_duplicate_student">This student has already been logged in</string>
-    <string name="login_symbol_helper">The symbol is located on the register page in the Mobile Access tab</string>
+    <string name="login_duplicate_student">Selected student is already logged in</string>
+    <string name="login_symbol_helper">The symbol can be found on the register page in Uczeń -> Dostęp Mobilny -> Zarejestruj urządzenie mobilne</string>
+    <string name="login_select_student">Select students to log in to the application</string>
+    <string name="login_advanced">Other options</string>
+    <string name="login_privacy_policy">Privacy policy</string>
+    <string name="login_contact_header">Trouble signing in? Contact us!</string>
+    <string name="login_contact_email">Email</string>
+    <string name="login_contact_discord">Discord</string>
+    <string name="login_email_intent_title">Send email</string>
+    <string name="login_email_subject" translatable="false">Zgłoszenie: Problemy z logowaniem</string>
+    <string name="login_email_text" translatable="false">Informacje o aplikacji:\n\nUrządzenie: %1$s\nWersja SDK: %2$s\nWersja aplikacji: %3$s\n\nOpis problemu:</string>
 
 
     <!--Main-->
@@ -55,6 +75,7 @@
     <string name="grade_no_average">No average</string>
     <string name="grade_predicted">Predicted: %1$s</string>
     <string name="grade_final">Final: %1$s</string>
+    <string name="grade_summary_points">Total points</string>
     <string name="grade_summary_final_grade">Final grade</string>
     <string name="grade_summary_predicted_grade">Predicted grade</string>
     <string name="grade_summary_calculated_average">Calculated average</string>
@@ -62,8 +83,9 @@
     <string name="grade_menu_summary">Summary</string>
     <string name="grade_menu_statistics">Class</string>
     <string name="grade_menu_read">Mark as read</string>
-    <string name="grade_statistics_partial">Partial grades</string>
-    <string name="grade_statistics_semester">Semester grades</string>
+    <string name="grade_statistics_partial">Partial</string>
+    <string name="grade_statistics_semester">Semester</string>
+    <string name="grade_statistics_points">Points</string>
     <plurals name="grade_number_item">
         <item quantity="one">%d grade</item>
         <item quantity="other">%d grades</item>
@@ -134,6 +156,11 @@
     <string name="message_to">To:</string>
     <string name="message_date">Date: %s</string>
     <string name="message_reply">Reply</string>
+    <string name="message_forward">Forward</string>
+    <string name="message_delete">Delete</string>
+    <string name="message_move_to_bin">Move to trash</string>
+    <string name="message_delete_forever">Delete permanently</string>
+    <string name="message_delete_success">Message deleted successfully</string>
     <string name="message_subject">Subject</string>
     <string name="message_content">Content</string>
     <string name="message_send_successful">Message sent successfully</string>
@@ -180,6 +207,38 @@
     <string name="lucky_number_notify_new_item_title">Lucky number for today</string>
     <string name="lucky_number_notify_new_item">Today\'s lucky number is: %d</string>
 
+    <!--Mobile devices-->
+    <string name="mobile_devices_title">Mobile devices</string>
+    <string name="mobile_devices_no_items">No devices</string>
+    <string name="mobile_devices_unregister">Deregister</string>
+    <string name="mobile_device_removed">Device removed</string>
+    <string name="mobile_device_qr">QR code</string>
+    <string name="mobile_device_token">Token</string>
+    <string name="mobile_device_symbol">Symbol</string>
+    <string name="mobile_device_pin">PIN</string>
+
+
+    <!--School and teachers-->
+    <string name="schoolandteachers_title">School and teachers</string>
+
+
+    <!--School-->
+    <string name="school_title">School</string>
+    <string name="school_no_info">No info about school</string>
+    <string name="school_name">School name</string>
+    <string name="school_address">School address</string>
+    <string name="school_telephone">Telephone</string>
+    <string name="school_headmaster">Name of headmaster</string>
+    <string name="school_pedagogue">Name of pedagogue</string>
+    <string name="school_address_button">Show on map</string>
+    <string name="school_telephone_button">Call</string>
+
+
+    <!--Teacher-->
+    <string name="teachers_title">Teachers</string>
+    <string name="teacher_no_items">No info about teachers</string>
+    <string name="teacher_no_subject">No subject</string>
+
 
     <!--Account-->
     <string name="account_add_new">Add account</string>
@@ -189,13 +248,28 @@
 
 
     <!--About-->
-    <string name="about_discord_invite">Discord</string>
+    <string name="about_version">App version</string>
     <string name="about_feedback">Report a bug</string>
+    <string name="about_feedback_summary">Send a bug report via e-mail</string>
+    <string name="about_faq">FAQ</string>
+    <string name="about_faq_summary">Read Frequently Asked Questions</string>
+    <string name="about_discord">Discord server</string>
+    <string name="about_discord_summary">Join the Wulkanowy community</string>
+    <string name="about_privacy">Privacy policy</string>
+    <string name="about_privacy_summary">Rules for collecting personal data</string>
     <string name="about_homepage">Homepage</string>
+    <string name="about_homepage_summary">Visit the website and help develop the application</string>
+    <string name="about_licenses">Licenses</string>
+    <string name="about_licenses_summary">Licenses of libraries used in the application</string>
+
+
+    <!--Licenses-->
+    <string name="license_dialog_title">License</string>
 
 
     <!--Generic-->
     <string name="all_content">Content</string>
+    <string name="all_retry">Retry</string>
     <string name="all_description">Description</string>
     <string name="all_no_description">No description</string>
     <string name="all_teacher">Teacher</string>
@@ -213,18 +287,21 @@
 
     <!--Timetable Widget-->
     <string name="widget_timetable_no_items">No lessons</string>
-    <string name="widget_timetable_today">Today</string>
-    <string name="widget_timetable_tomorrow">Tomorrow</string>
+    <string name="widget_timetable_theme_title">Choose theme</string>
+    <string name="widget_timetable_theme_light">Light</string>
+    <string name="widget_timetable_theme_dark">Dark</string>
 
 
     <!--Preferences-->
     <string name="pref_view_header">Appearance</string>
     <string name="pref_view_list">Default view</string>
-    <string name="pref_view_summary">Show the summary in the grades</string>
+    <string name="pref_view_grade_average_mode">Calculation of the end-of-year average</string>
+    <string name="pref_view_grade_average_force_calc">Force average calculation by app</string>
     <string name="pref_view_present">Show presence in attendance</string>
-    <string name="pref_view_theme_dark">Dark theme (Beta)</string>
+    <string name="pref_view_app_theme">Application theme</string>
     <string name="pref_view_expand_grade">Expand grades</string>
-    <string name="pref_grade_color_scheme">Grades color scheme</string>
+    <string name="pref_view_grade_color_scheme">Grades color scheme</string>
+    <string name="pref_view_app_language">App language</string>
 
     <string name="pref_notify_header">Notifications</string>
     <string name="pref_notify_switch">Show notifications</string>
@@ -232,7 +309,7 @@
 
     <string name="pref_services_header">Synchronization</string>
     <string name="pref_services_switch">Automatic update</string>
-    <string name="pref_services_suspended">Suspended on holiday</string>
+    <string name="pref_services_suspended">Suspended on holidays</string>
     <string name="pref_services_interval">Updates interval</string>
     <string name="pref_services_wifi">Wi-Fi only</string>
 
@@ -258,13 +335,16 @@
 
     <!--Others-->
     <string name="all_copied">Copied</string>
+    <string name="all_undo">Undo</string>
 
 
     <!--Errors-->
     <string name="error_no_internet">No internet connection</string>
-    <string name="error_timeout">Too long wait for connection</string>
-    <string name="error_login_failed">Login is failed. Try again or restart the app</string>
-    <string name="error_service_unavailable">The log is not available. Try again later</string>
+    <string name="error_timeout">Connection to the register timed out</string>
+    <string name="error_login_failed">Login failed. Try again or restart the app</string>
+    <string name="error_service_unavailable">The register is not available. Try again later</string>
     <string name="error_unknown">An unexpected error occurred</string>
     <string name="error_feature_disabled">Feature disabled by your school</string>
+    <string name="error_feature_not_available">Feature not available in this mode</string>
+
 </resources>
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index 4bbe3bc1b..68c0800b1 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -1,35 +1,16 @@
 <resources>
 
-    <style name="WulkanowyTheme" parent="@style/Theme.AppCompat.DayNight">
+    <style name="WulkanowyTheme" parent="BaseWulkanowyTheme" />
+
+    <style name="BaseWulkanowyTheme" parent="@style/Theme.MaterialComponents.Light">
         <item name="colorPrimary">@color/colorPrimary</item>
-        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
-        <item name="colorAccent">@color/colorPrimary</item>
-        <item name="actionMenuTextColor">@android:color/primary_text_dark</item>
-        <item name="android:textColorPrimary">@android:color/primary_text_light</item>
-        <item name="android:textColorSecondary">@android:color/secondary_text_light</item>
-        <item name="android:textColorSecondaryInverse">@android:color/primary_text_dark</item>
-        <item name="android:textColorTertiary">@android:color/primary_text_light</item>
-        <item name="android:textColorTertiaryInverse">@android:color/primary_text_dark</item>
-        <item name="titleTextColor">@android:color/primary_text_dark</item>
-        <item name="subtitleTextColor">@android:color/primary_text_dark</item>
-        <item name="android:colorBackground">@android:color/white</item>
-        <item name="bottomNavBackground">@color/bottom_nav_background_inverse</item>
-        <item name="dividerColor">@color/divider</item>
-        <item name="chip_detailed_backgroundColor">@color/chip_detailed_backgroundColor</item>
-
-        <!-- AboutLibraries specific values -->
-        <item name="about_libraries_window_background">@color/about_libraries_window_background</item>
-        <item name="about_libraries_card">@color/about_libraries_card</item>
-        <item name="about_libraries_title_openSource">@color/about_libraries_title_openSource</item>
-        <item name="about_libraries_title_description">@color/about_libraries_title_openSource</item>
-        <item name="about_libraries_text_openSource">@color/about_libraries_text_openSource</item>
-        <item name="about_libraries_special_button_openSource">@color/about_libraries_special_button_openSource</item>
-        <item name="about_libraries_dividerDark_openSource">@color/about_libraries_dividerDark_openSource</item>
-        <item name="about_libraries_dividerLight_openSource">@color/about_libraries_dividerLight_openSource</item>
-    </style>
-
-    <style name="WulkanowyTheme.SplashScreen" parent="WulkanowyTheme.NoActionBar">
-        <item name="android:windowBackground">@drawable/layer_splash_background</item>
+        <item name="colorSecondary">@color/colorPrimary</item>
+        <item name="colorOnSecondary">@android:color/white</item>
+        <item name="colorTimetableChange">@color/timetable_change_dark</item>
+        <item name="colorError">@color/colorError</item>
+        <item name="colorDivider">@color/colorDivider</item>
+        <item name="android:textColor">?android:textColorPrimary</item>
+        <item name="android:preferenceStyle">@style/PreferenceThemeOverlay</item>
     </style>
 
     <style name="WulkanowyTheme.NoActionBar" parent="WulkanowyTheme">
@@ -37,7 +18,17 @@
         <item name="windowNoTitle">true</item>
     </style>
 
-    <style name="WulkanowyTheme.ActionBar" parent="WulkanowyTheme">
-        <item name="colorControlNormal">@android:color/white</item>
+    <style name="WulkanowyTheme.SplashScreen" parent="WulkanowyTheme.NoActionBar">
+        <item name="android:windowBackground">@drawable/layer_splash_background</item>
     </style>
+
+    <style name="WulkanowyTheme.WidgetAccountSwitcher" parent="Theme.MaterialComponents.Light.Dialog">
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorSecondary">@color/colorPrimary</item>
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+        <item name="android:textColor">?android:textColorPrimary</item>
+    </style>
+
+    <style name="mdtp_ActionButton.Text" parent="Widget.MaterialComponents.Button.TextButton.Dialog"/>
 </resources>
diff --git a/app/src/main/res/xml/provider_widget_lucky_number.xml b/app/src/main/res/xml/provider_widget_lucky_number.xml
new file mode 100644
index 000000000..064f20570
--- /dev/null
+++ b/app/src/main/res/xml/provider_widget_lucky_number.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:configure="io.github.wulkanowy.ui.modules.luckynumberwidget.LuckyNumberWidgetConfigureActivity"
+    android:initialLayout="@layout/widget_luckynumber"
+    android:minWidth="110dp"
+    android:minHeight="40dp"
+    android:minResizeWidth="40dp"
+    android:minResizeHeight="40dp"
+    android:previewImage="@drawable/img_luckynumber_widget_preview"
+    android:resizeMode="horizontal|vertical"
+    android:updatePeriodMillis="3600000"
+    android:widgetCategory="home_screen"
+    tools:targetApi="jelly_bean_mr1" />
diff --git a/app/src/main/res/xml/provider_widget_timetable.xml b/app/src/main/res/xml/provider_widget_timetable.xml
index 48c6ba395..5392dd50b 100644
--- a/app/src/main/res/xml/provider_widget_timetable.xml
+++ b/app/src/main/res/xml/provider_widget_timetable.xml
@@ -1,9 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:configure="io.github.wulkanowy.ui.modules.timetablewidget.TimetableWidgetConfigureActivity"
     android:initialLayout="@layout/widget_timetable"
-    android:minWidth="150dp"
-    android:minHeight="100dp"
+    android:minWidth="250dp"
+    android:minHeight="110dp"
+    android:minResizeWidth="250dp"
+    android:minResizeHeight="110dp"
     android:previewImage="@drawable/img_timetable_widget_preview"
     android:resizeMode="horizontal|vertical"
     android:updatePeriodMillis="3600000"
-    android:widgetCategory="home_screen" />
+    android:widgetCategory="home_screen"
+    tools:targetApi="jelly_bean_mr1" />
diff --git a/app/src/main/res/xml/scheme_preferences.xml b/app/src/main/res/xml/scheme_preferences.xml
index 08c241246..d9e6c5333 100644
--- a/app/src/main/res/xml/scheme_preferences.xml
+++ b/app/src/main/res/xml/scheme_preferences.xml
@@ -1,106 +1,126 @@
-<?xml version="1.0" encoding="utf-8"?>
-<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto">
+<?xml version="1.0" encoding="utf-8"?><!--suppress AndroidElementNotAllowed -->
+<PreferenceScreen xmlns:app="http://schemas.android.com/apk/res-auto">
     <PreferenceCategory
-        android:title="@string/pref_view_header"
-        app:iconSpaceReserved="false">
+        app:iconSpaceReserved="false"
+        app:title="@string/pref_view_header">
         <ListPreference
-            android:defaultValue="0"
-            android:entries="@array/startup_tab_entries"
-            android:entryValues="@array/startup_tab_value"
-            android:key="@string/pref_key_start_menu"
-            android:summary="%s"
-            android:title="@string/pref_view_list"
-            app:iconSpaceReserved="false" />
+            app:defaultValue="@string/pref_default_startup"
+            app:entries="@array/startup_tab_entries"
+            app:entryValues="@array/startup_tab_value"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_start_menu"
+            app:title="@string/pref_view_list"
+            app:useSimpleSummaryProvider="true" />
         <ListPreference
-            android:defaultValue="1"
-            android:entries="@array/theme_entries"
-            android:entryValues="@array/theme_values"
-            android:key="theme"
-            android:summary="%s"
-            android:title="@string/pref_view_theme_dark"
-            app:iconSpaceReserved="false" />
-        <SwitchPreference
-            android:defaultValue="true"
-            android:key="@string/pref_key_attendance_present"
-            android:title="@string/pref_view_present"
-            app:iconSpaceReserved="false" />
-        <SwitchPreference
-            android:defaultValue="false"
-            android:key="@string/pref_key_expand_grade"
-            android:title="@string/pref_view_expand_grade"
-            app:iconSpaceReserved="false" />
+            app:defaultValue="@string/pref_default_app_theme"
+            app:entries="@array/app_theme_entries"
+            app:entryValues="@array/app_theme_values"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_app_theme"
+            app:title="@string/pref_view_app_theme"
+            app:useSimpleSummaryProvider="true" />
+        <SwitchPreferenceCompat
+            app:defaultValue="@bool/pref_default_attendance_present"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_attendance_present"
+            app:title="@string/pref_view_present" />
+        <SwitchPreferenceCompat
+            app:defaultValue="@bool/pref_default_expand_grade"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_expand_grade"
+            app:title="@string/pref_view_expand_grade" />
         <ListPreference
-            android:defaultValue="vulcan"
-            android:entries="@array/grade_color_scheme_entries"
-            android:entryValues="@array/grade_color_scheme_values"
-            android:key="@string/pref_key_grade_color_scheme"
-            android:summary="%s"
-            android:title="@string/pref_grade_color_scheme"
-            app:iconSpaceReserved="false" />
+            app:defaultValue="@string/pref_default_grade_color_scheme"
+            app:entries="@array/grade_color_scheme_entries"
+            app:entryValues="@array/grade_color_scheme_values"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_grade_color_scheme"
+            app:title="@string/pref_view_grade_color_scheme"
+            app:useSimpleSummaryProvider="true" />
+        <ListPreference
+            app:defaultValue="@string/pref_default_app_language"
+            app:entries="@array/app_language_entries"
+            app:entryValues="@array/app_language_values"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_app_language"
+            app:title="@string/pref_view_app_language"
+            app:useSimpleSummaryProvider="true" />
     </PreferenceCategory>
     <PreferenceCategory
-        android:title="@string/pref_services_header"
-        app:iconSpaceReserved="false">
-        <SwitchPreference
-            android:defaultValue="true"
-            android:key="@string/pref_key_services_enable"
-            android:title="@string/pref_services_switch"
-            app:iconSpaceReserved="false" />
+        app:iconSpaceReserved="false"
+        app:title="@string/pref_services_header">
+        <SwitchPreferenceCompat
+            app:defaultValue="@bool/pref_default_services_enable"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_services_enable"
+            app:title="@string/pref_services_switch" />
         <ListPreference
-            android:defaultValue="60"
-            android:dependency="services_enable"
-            android:entries="@array/services_interval_entries"
-            android:entryValues="@array/services_interval_value"
-            android:key="@string/pref_key_services_interval"
-            android:summary="%s"
-            android:title="@string/pref_services_interval"
-            app:iconSpaceReserved="false" />
-        <SwitchPreference
-            android:defaultValue="false"
-            android:dependency="services_enable"
-            android:key="@string/pref_key_services_wifi_only"
-            android:title="@string/pref_services_wifi"
-            app:iconSpaceReserved="false" />
+            app:defaultValue="@string/pref_default_services_interval"
+            app:dependency="services_enable"
+            app:entries="@array/services_interval_entries"
+            app:entryValues="@array/services_interval_value"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_services_interval"
+            app:title="@string/pref_services_interval"
+            app:useSimpleSummaryProvider="true" />
+        <SwitchPreferenceCompat
+            app:defaultValue="@bool/pref_default_services_wifi_only"
+            app:dependency="services_enable"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_services_wifi_only"
+            app:title="@string/pref_services_wifi" />
     </PreferenceCategory>
     <PreferenceCategory
-        android:title="@string/pref_notify_header"
-        app:iconSpaceReserved="false">
-        <SwitchPreference
-            android:defaultValue="true"
-            android:dependency="services_enable"
-            android:key="@string/pref_key_notifications_enable"
-            android:title="@string/pref_notify_switch"
-            app:iconSpaceReserved="false" />
-        <SwitchPreference
-            android:defaultValue="false"
-            android:key="@string/pref_key_notification_debug"
-            android:title="@string/pref_notify_debug_switch"
-            app:iconSpaceReserved="false" />
+        app:iconSpaceReserved="false"
+        app:title="@string/pref_notify_header">
+        <SwitchPreferenceCompat
+            app:defaultValue="@bool/pref_default_notifications_enable"
+            app:dependency="services_enable"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_notifications_enable"
+            app:title="@string/pref_notify_switch" />
+        <SwitchPreferenceCompat
+            app:defaultValue="@bool/pref_default_notification_debug"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_notification_debug"
+            app:title="@string/pref_notify_debug_switch" />
     </PreferenceCategory>
     <PreferenceCategory
-        android:title="@string/pref_other_header"
-        app:iconSpaceReserved="false">
+        app:iconSpaceReserved="false"
+        app:title="@string/pref_other_header">
         <ListPreference
-            android:defaultValue="0.0"
-            android:entries="@array/grade_modifier_entries"
-            android:entryValues="@array/grade_modifier_value"
-            android:key="@string/pref_key_grade_modifier_plus"
-            android:summary="%s"
-            android:title="@string/pref_other_grade_modifier_plus"
-            app:iconSpaceReserved="false" />
+            app:defaultValue="@string/pref_default_grade_modifier_plus"
+            app:entries="@array/grade_modifier_entries"
+            app:entryValues="@array/grade_modifier_value"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_grade_modifier_plus"
+            app:title="@string/pref_other_grade_modifier_plus"
+            app:useSimpleSummaryProvider="true" />
         <ListPreference
-            android:defaultValue="0.0"
-            android:entries="@array/grade_modifier_entries"
-            android:entryValues="@array/grade_modifier_value"
-            android:key="@string/pref_key_grade_modifier_minus"
-            android:summary="%s"
-            android:title="@string/pref_other_grade_modifier_minus"
-            app:iconSpaceReserved="false" />
-        <SwitchPreference
-            android:defaultValue="true"
-            android:key="@string/pref_key_fill_message_content"
-            android:title="@string/pref_other_fill_message_content"
-            app:iconSpaceReserved="false" />
+            app:defaultValue="@string/pref_default_grade_modifier_minus"
+            app:entries="@array/grade_modifier_entries"
+            app:entryValues="@array/grade_modifier_value"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_grade_modifier_minus"
+            app:title="@string/pref_other_grade_modifier_minus"
+            app:useSimpleSummaryProvider="true" />
+        <ListPreference
+            app:defaultValue="@string/pref_default_grade_average_mode"
+            app:entries="@array/grade_average_mode_entries"
+            app:entryValues="@array/grade_average_mode_values"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_grade_average_mode"
+            app:title="@string/pref_view_grade_average_mode"
+            app:useSimpleSummaryProvider="true" />
+        <SwitchPreferenceCompat
+            app:defaultValue="@bool/pref_default_grade_average_force_calc"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_grade_average_force_calc"
+            app:title="@string/pref_view_grade_average_force_calc" />
+        <SwitchPreferenceCompat
+            app:defaultValue="@bool/pref_default_fill_message_content"
+            app:iconSpaceReserved="false"
+            app:key="@string/pref_key_fill_message_content"
+            app:title="@string/pref_other_fill_message_content" />
     </PreferenceCategory>
 </PreferenceScreen>
diff --git a/app/src/play/java/io/github/wulkanowy/utils/CrashlyticsUtils.kt b/app/src/play/java/io/github/wulkanowy/utils/CrashlyticsUtils.kt
new file mode 100644
index 000000000..4f76ef837
--- /dev/null
+++ b/app/src/play/java/io/github/wulkanowy/utils/CrashlyticsUtils.kt
@@ -0,0 +1,31 @@
+package io.github.wulkanowy.utils
+
+import android.content.Context
+import com.crashlytics.android.Crashlytics
+import com.crashlytics.android.core.CrashlyticsCore
+import io.fabric.sdk.android.Fabric
+import timber.log.Timber
+
+fun initCrashlytics(context: Context, appInfo: AppInfo) {
+    Fabric.with(Fabric.Builder(context)
+        .kits(
+            Crashlytics.Builder()
+                .core(CrashlyticsCore.Builder()
+                    .disabled(!appInfo.isCrashlyticsEnabled)
+                    .build())
+                .build()
+        )
+        .debuggable(appInfo.isDebug)
+        .build())
+}
+
+class CrashlyticsTree : Timber.Tree() {
+
+    override fun log(priority: Int, tag: String?, message: String, t: Throwable?) {
+        Crashlytics.setInt("priority", priority)
+        Crashlytics.setString("tag", tag)
+
+        if (t == null) Crashlytics.log(message)
+        else Crashlytics.logException(t)
+    }
+}
diff --git a/app/src/main/java/io/github/wulkanowy/utils/FirebaseAnalyticsHelper.kt b/app/src/play/java/io/github/wulkanowy/utils/FirebaseAnalyticsHelper.kt
similarity index 76%
rename from app/src/main/java/io/github/wulkanowy/utils/FirebaseAnalyticsHelper.kt
rename to app/src/play/java/io/github/wulkanowy/utils/FirebaseAnalyticsHelper.kt
index feb33e5d7..6810e66ac 100644
--- a/app/src/main/java/io/github/wulkanowy/utils/FirebaseAnalyticsHelper.kt
+++ b/app/src/play/java/io/github/wulkanowy/utils/FirebaseAnalyticsHelper.kt
@@ -1,11 +1,15 @@
 package io.github.wulkanowy.utils
 
+import android.content.Context
 import android.os.Bundle
 import com.google.firebase.analytics.FirebaseAnalytics
+import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class FirebaseAnalyticsHelper(private val analytics: FirebaseAnalytics) {
+class FirebaseAnalyticsHelper @Inject constructor(private val context: Context) {
+
+    private val analytics by lazy { FirebaseAnalytics.getInstance(context) }
 
     fun logEvent(name: String, vararg params: Pair<String, Any?>) {
         Bundle().apply {
diff --git a/app/src/test/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRemoteTest.kt b/app/src/test/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRemoteTest.kt
index 8adfa83bd..b471dc520 100644
--- a/app/src/test/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRemoteTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/data/repositories/attendance/AttendanceRemoteTest.kt
@@ -1,23 +1,22 @@
 package io.github.wulkanowy.data.repositories.attendance
 
-import io.github.wulkanowy.api.Api
-import io.github.wulkanowy.api.attendance.Attendance
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.sdk.Sdk
+import io.github.wulkanowy.sdk.pojo.Attendance
 import io.mockk.MockKAnnotations
 import io.mockk.every
 import io.mockk.impl.annotations.MockK
-import io.mockk.impl.annotations.SpyK
 import io.reactivex.Single
 import org.junit.Assert.assertEquals
 import org.junit.Before
 import org.junit.Test
 import org.threeten.bp.LocalDate
-import java.sql.Date
+import org.threeten.bp.LocalDate.of
 
 class AttendanceRemoteTest {
 
-    @SpyK
-    private var mockApi = Api()
+    @MockK
+    private lateinit var mockSdk: Sdk
 
     @MockK
     private lateinit var semesterMock: Semester
@@ -29,29 +28,46 @@ class AttendanceRemoteTest {
 
     @Test
     fun getAttendanceTest() {
-        every { mockApi.getAttendance(
-                LocalDate.of(2018, 9, 10),
-                LocalDate.of(2018, 9, 15)
-        ) } returns Single.just(listOf(
-                getAttendance("2018-09-10"),
-                getAttendance("2018-09-17")
+        every {
+            mockSdk.getAttendance(
+                of(2018, 9, 10),
+                of(2018, 9, 15),
+                1
+            )
+        } returns Single.just(listOf(
+            getAttendance(of(2018, 9, 10)),
+            getAttendance(of(2018, 9, 17))
         ))
 
-        every { mockApi.diaryId } returns 1
         every { semesterMock.studentId } returns 1
         every { semesterMock.diaryId } returns 1
+        every { semesterMock.schoolYear } returns 2019
+        every { semesterMock.semesterId } returns 1
+        every { mockSdk.switchDiary(any(), any()) } returns mockSdk
 
-        val attendance = AttendanceRemote(mockApi).getAttendance(semesterMock,
-                LocalDate.of(2018, 9, 10),
-                LocalDate.of(2018, 9, 15)).blockingGet()
+        val attendance = AttendanceRemote(mockSdk).getAttendance(semesterMock,
+            of(2018, 9, 10),
+            of(2018, 9, 15)
+        ).blockingGet()
         assertEquals(2, attendance.size)
     }
 
-    private fun getAttendance(dateString: String): Attendance {
-        return Attendance().apply {
-            subject = "Fizyka"
-            name = "Obecność"
-            date = Date.valueOf(dateString)
-        }
+    private fun getAttendance(date: LocalDate): Attendance {
+        return Attendance(
+            subject = "Fizyka",
+            name = "Obecność",
+            date = date,
+            timeId = 0,
+            number = 0,
+            deleted = false,
+            excusable = false,
+            excused = false,
+            exemption = false,
+            lateness = false,
+            presence = false,
+            categoryId = 1,
+            absence = false,
+            excuseStatus = null
+        )
     }
 }
diff --git a/app/src/test/java/io/github/wulkanowy/data/repositories/completedlessons/CompletedLessonsRemoteTest.kt b/app/src/test/java/io/github/wulkanowy/data/repositories/completedlessons/CompletedLessonsRemoteTest.kt
index bb9f52945..7570164fd 100644
--- a/app/src/test/java/io/github/wulkanowy/data/repositories/completedlessons/CompletedLessonsRemoteTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/data/repositories/completedlessons/CompletedLessonsRemoteTest.kt
@@ -1,23 +1,22 @@
 package io.github.wulkanowy.data.repositories.completedlessons
 
-import io.github.wulkanowy.api.Api
-import io.github.wulkanowy.api.timetable.CompletedLesson
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.sdk.Sdk
+import io.github.wulkanowy.sdk.pojo.CompletedLesson
 import io.mockk.MockKAnnotations
 import io.mockk.every
 import io.mockk.impl.annotations.MockK
-import io.mockk.impl.annotations.SpyK
 import io.reactivex.Single
 import org.junit.Assert
 import org.junit.Before
 import org.junit.Test
 import org.threeten.bp.LocalDate
-import java.sql.Date
+import org.threeten.bp.LocalDate.of
 
 class CompletedLessonsRemoteTest {
 
-    @SpyK
-    private var mockApi = Api()
+    @MockK
+    private lateinit var mockSdk: Sdk
 
     @MockK
     private lateinit var semesterMock: Semester
@@ -30,27 +29,39 @@ class CompletedLessonsRemoteTest {
     @Test
     fun getCompletedLessonsTest() {
         every {
-            mockApi.getCompletedLessons(
-                LocalDate.of(2018, 9, 10),
-                LocalDate.of(2018, 9, 15)
+            mockSdk.getCompletedLessons(
+                of(2018, 9, 10),
+                of(2018, 9, 15)
             )
         } returns Single.just(listOf(
-            getCompletedLesson("2018-09-10"),
-            getCompletedLesson("2018-09-17")
+            getCompletedLesson(of(2018, 9, 10)),
+            getCompletedLesson(of(2018, 9, 17))
         ))
 
-        every { mockApi.diaryId } returns 1
         every { semesterMock.studentId } returns 1
         every { semesterMock.diaryId } returns 1
+        every { semesterMock.schoolYear } returns 2019
+        every { semesterMock.semesterId } returns 1
+        every { mockSdk.switchDiary(any(), any()) } returns mockSdk
 
-        val completed = CompletedLessonsRemote(mockApi).getCompletedLessons(semesterMock,
-            LocalDate.of(2018, 9, 10),
-            LocalDate.of(2018, 9, 15)
+        val completed = CompletedLessonsRemote(mockSdk).getCompletedLessons(semesterMock,
+            of(2018, 9, 10),
+            of(2018, 9, 15)
         ).blockingGet()
         Assert.assertEquals(2, completed.size)
     }
 
-    private fun getCompletedLesson(dateString: String): CompletedLesson {
-        return CompletedLesson().apply { date = Date.valueOf(dateString) }
+    private fun getCompletedLesson(date: LocalDate): CompletedLesson {
+        return CompletedLesson(
+            date = date,
+            subject = "",
+            absence = "",
+            resources = "",
+            substitution = "",
+            teacherSymbol = "",
+            teacher = "",
+            topic = "",
+            number = 1
+        )
     }
 }
diff --git a/app/src/test/java/io/github/wulkanowy/data/repositories/exam/ExamRemoteTest.kt b/app/src/test/java/io/github/wulkanowy/data/repositories/exam/ExamRemoteTest.kt
index 0c83bed0a..c17ec21eb 100644
--- a/app/src/test/java/io/github/wulkanowy/data/repositories/exam/ExamRemoteTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/data/repositories/exam/ExamRemoteTest.kt
@@ -1,23 +1,22 @@
 package io.github.wulkanowy.data.repositories.exam
 
-import io.github.wulkanowy.api.Api
-import io.github.wulkanowy.api.exams.Exam
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.sdk.Sdk
+import io.github.wulkanowy.sdk.pojo.Exam
 import io.mockk.MockKAnnotations
 import io.mockk.every
 import io.mockk.impl.annotations.MockK
-import io.mockk.impl.annotations.SpyK
 import io.reactivex.Single
 import org.junit.Assert.assertEquals
 import org.junit.Before
 import org.junit.Test
 import org.threeten.bp.LocalDate
-import java.sql.Date
+import org.threeten.bp.LocalDate.of
 
 class ExamRemoteTest {
 
-    @SpyK
-    private var mockApi = Api()
+    @MockK
+    private lateinit var mockSdk: Sdk
 
     @MockK
     private lateinit var semesterMock: Semester
@@ -29,35 +28,41 @@ class ExamRemoteTest {
 
     @Test
     fun getExamsTest() {
-        every { mockApi.getExams(
-                LocalDate.of(2018, 9, 10),
-                LocalDate.of(2018, 9, 15)
-        ) } returns Single.just(listOf(
-                getExam("2018-09-10"),
-                getExam("2018-09-17")
+        every {
+            mockSdk.getExams(
+                of(2018, 9, 10),
+                of(2018, 9, 15),
+                1
+            )
+        } returns Single.just(listOf(
+            getExam(of(2018, 9, 10)),
+            getExam(of(2018, 9, 17))
         ))
 
-        every { mockApi.diaryId } returns 1
         every { semesterMock.studentId } returns 1
         every { semesterMock.diaryId } returns 1
+        every { semesterMock.schoolYear } returns 2019
+        every { semesterMock.semesterId } returns 1
+        every { mockSdk.switchDiary(any(), any()) } returns mockSdk
 
-        val exams = ExamRemote(mockApi).getExams(semesterMock,
-                LocalDate.of(2018, 9, 10),
-                LocalDate.of(2018, 9, 15)
-        ).blockingGet()
+        val exams = ExamRemote(mockSdk)
+            .getExams(semesterMock,
+                of(2018, 9, 10),
+                of(2018, 9, 15)
+            ).blockingGet()
         assertEquals(2, exams.size)
     }
 
-    private fun getExam(dateString: String): Exam {
-        return Exam().apply {
-            subject = ""
-            group = ""
-            type = ""
-            description = ""
-            teacher = ""
-            teacherSymbol = ""
-            date = Date.valueOf(dateString)
-            entryDate = Date.valueOf(dateString)
-        }
+    private fun getExam(date: LocalDate): Exam {
+        return Exam(
+            subject = "",
+            group = "",
+            type = "",
+            description = "",
+            teacher = "",
+            teacherSymbol = "",
+            date = date,
+            entryDate = date
+        )
     }
 }
diff --git a/app/src/test/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsRemoteTest.kt b/app/src/test/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsRemoteTest.kt
index 37d3f2ad6..ee08454f1 100644
--- a/app/src/test/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsRemoteTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/data/repositories/gradestatistics/GradeStatisticsRemoteTest.kt
@@ -1,21 +1,21 @@
 package io.github.wulkanowy.data.repositories.gradestatistics
 
-import io.github.wulkanowy.api.Api
-import io.github.wulkanowy.api.grades.GradeStatistics
 import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.sdk.Sdk
+import io.github.wulkanowy.sdk.pojo.GradePointsStatistics
+import io.github.wulkanowy.sdk.pojo.GradeStatistics
 import io.mockk.MockKAnnotations
 import io.mockk.every
 import io.mockk.impl.annotations.MockK
-import io.mockk.impl.annotations.SpyK
 import io.reactivex.Single
-import org.junit.Assert
+import org.junit.Assert.assertEquals
 import org.junit.Before
 import org.junit.Test
 
 class GradeStatisticsRemoteTest {
 
-    @SpyK
-    private var mockApi = Api()
+    @MockK
+    private lateinit var mockSdk: Sdk
 
     @MockK
     private lateinit var semesterMock: Semester
@@ -27,26 +27,54 @@ class GradeStatisticsRemoteTest {
 
     @Test
     fun getGradeStatisticsTest() {
-        every { mockApi.getGradesStatistics(1, any()) } returns Single.just(listOf(
+        every { mockSdk.getGradesPartialStatistics(1) } returns Single.just(listOf(
             getGradeStatistics("Fizyka"),
             getGradeStatistics("Matematyka")
         ))
 
-        every { mockApi.diaryId } returns 1
         every { semesterMock.studentId } returns 1
-        every { semesterMock.semesterId } returns 1
-        every { semesterMock.semesterName } returns 2
         every { semesterMock.diaryId } returns 1
+        every { semesterMock.schoolYear } returns 2019
+        every { semesterMock.semesterId } returns 1
+        every { mockSdk.switchDiary(any(), any()) } returns mockSdk
 
-        val stats = GradeStatisticsRemote(mockApi).getGradeStatistics(semesterMock, false).blockingGet()
-        Assert.assertEquals(2, stats.size)
+        val stats = GradeStatisticsRemote(mockSdk).getGradeStatistics(semesterMock, false).blockingGet()
+        assertEquals(2, stats.size)
+    }
+
+    @Test
+    fun getGradePointsStatisticsTest() {
+        every { mockSdk.getGradesPointsStatistics(1) } returns Single.just(listOf(
+            getGradePointsStatistics("Fizyka"),
+            getGradePointsStatistics("Matematyka")
+        ))
+
+        every { semesterMock.studentId } returns 1
+        every { semesterMock.diaryId } returns 1
+        every { semesterMock.schoolYear } returns 2019
+        every { semesterMock.semesterId } returns 1
+        every { mockSdk.switchDiary(any(), any()) } returns mockSdk
+
+        val stats = GradeStatisticsRemote(mockSdk).getGradePointsStatistics(semesterMock).blockingGet()
+        assertEquals(2, stats.size)
     }
 
     private fun getGradeStatistics(subjectName: String): GradeStatistics {
-        return GradeStatistics().apply {
-            subject = subjectName
-            gradeValue = 5
-            amount = 10
-        }
+        return GradeStatistics(
+            subject = subjectName,
+            gradeValue = 5,
+            amount = 10,
+            grade = "",
+            semesterId = 1
+        )
+    }
+
+    private fun getGradePointsStatistics(subjectName: String): GradePointsStatistics {
+        return GradePointsStatistics(
+            semesterId = 1,
+            subject = subjectName,
+            student = 0.80,
+            others = 0.40
+        )
     }
 }
diff --git a/app/src/test/java/io/github/wulkanowy/data/repositories/luckynumber/LuckyNumberRemoteTest.kt b/app/src/test/java/io/github/wulkanowy/data/repositories/luckynumber/LuckyNumberRemoteTest.kt
index 67e6c2ef6..e8699f1ee 100644
--- a/app/src/test/java/io/github/wulkanowy/data/repositories/luckynumber/LuckyNumberRemoteTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/data/repositories/luckynumber/LuckyNumberRemoteTest.kt
@@ -1,8 +1,7 @@
 package io.github.wulkanowy.data.repositories.luckynumber
 
-import io.github.wulkanowy.api.Api
 import io.github.wulkanowy.data.db.entities.Semester
-import io.github.wulkanowy.data.repositories.luckynumber.LuckyNumberRemote
+import io.github.wulkanowy.sdk.Sdk
 import io.mockk.MockKAnnotations
 import io.mockk.every
 import io.mockk.impl.annotations.MockK
@@ -16,7 +15,7 @@ import org.threeten.bp.LocalDate
 class LuckyNumberRemoteTest {
 
     @SpyK
-    private var mockApi = Api()
+    private var mockSdk = Sdk()
 
     @MockK
     private lateinit var semesterMock: Semester
@@ -28,13 +27,13 @@ class LuckyNumberRemoteTest {
 
     @Test
     fun getLuckyNumberTest() {
-        every { mockApi.getLuckyNumber() } returns Maybe.just(14)
+        every { mockSdk.getLuckyNumber() } returns Maybe.just(14)
 
-        every { mockApi.diaryId } returns 1
+        every { mockSdk.diaryId } returns 1
         every { semesterMock.studentId } returns 1
         every { semesterMock.diaryId } returns 1
 
-        val luckyNumber = LuckyNumberRemote(mockApi)
+        val luckyNumber = LuckyNumberRemote(mockSdk)
             .getLuckyNumber(semesterMock)
             .blockingGet()
 
diff --git a/app/src/test/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRepositoryTest.kt b/app/src/test/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRepositoryTest.kt
new file mode 100644
index 000000000..9c1bb9756
--- /dev/null
+++ b/app/src/test/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRepositoryTest.kt
@@ -0,0 +1,64 @@
+package io.github.wulkanowy.data.repositories.mobiledevice
+
+import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.repositories.UnitTestInternetObservingStrategy
+import io.reactivex.Maybe
+import io.reactivex.Single
+import org.junit.Before
+import org.junit.Test
+import org.mockito.Mock
+import org.mockito.Mockito.doReturn
+import org.mockito.Mockito.verify
+import org.mockito.MockitoAnnotations
+import org.threeten.bp.LocalDateTime.of
+
+class MobileDeviceRepositoryTest {
+
+    @Mock
+    private lateinit var semester: Semester
+
+    @Mock
+    private lateinit var mobileDeviceRemote: MobileDeviceRemote
+
+    @Mock
+    private lateinit var mobileDeviceLocal: MobileDeviceLocal
+
+    private lateinit var mobileDeviceRepository: MobileDeviceRepository
+
+    private val settings = InternetObservingSettings.builder()
+        .strategy(UnitTestInternetObservingStrategy())
+        .build()
+
+    @Before
+    fun initTest() {
+        MockitoAnnotations.initMocks(this)
+        mobileDeviceRepository = MobileDeviceRepository(settings, mobileDeviceLocal, mobileDeviceRemote)
+    }
+
+    @Test
+    fun getDevices() {
+        val devices = listOf(
+            getDeviceEntity(1),
+            getDeviceEntity(2)
+        )
+
+        doReturn(Maybe.empty<MobileDevice>()).`when`(mobileDeviceLocal).getDevices(semester)
+        doReturn(Single.just(devices)).`when`(mobileDeviceRemote).getDevices(semester)
+
+        mobileDeviceRepository.getDevices(semester).blockingGet()
+
+        verify(mobileDeviceLocal).deleteDevices(emptyList())
+        verify(mobileDeviceLocal).saveDevices(devices)
+    }
+
+    private fun getDeviceEntity(day: Int): MobileDevice {
+        return MobileDevice(
+            studentId = 1,
+            deviceId = 1,
+            name = "",
+            date = of(2019, 5, day, 0, 0, 0)
+        )
+    }
+}
diff --git a/app/src/test/java/io/github/wulkanowy/data/repositories/semester/SemesterRepositoryTest.kt b/app/src/test/java/io/github/wulkanowy/data/repositories/semester/SemesterRepositoryTest.kt
index 7856b9370..808354761 100644
--- a/app/src/test/java/io/github/wulkanowy/data/repositories/semester/SemesterRepositoryTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/data/repositories/semester/SemesterRepositoryTest.kt
@@ -1,7 +1,7 @@
 package io.github.wulkanowy.data.repositories.semester
 
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
-import io.github.wulkanowy.data.ApiHelper
+import io.github.wulkanowy.data.SdkHelper
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.repositories.UnitTestInternetObservingStrategy
@@ -24,7 +24,7 @@ class SemesterRepositoryTest {
     private lateinit var semesterLocal: SemesterLocal
 
     @Mock
-    private lateinit var apiHelper: ApiHelper
+    private lateinit var sdkHelper: SdkHelper
 
     @Mock
     private lateinit var student: Student
@@ -38,7 +38,7 @@ class SemesterRepositoryTest {
     @Before
     fun initTest() {
         MockitoAnnotations.initMocks(this)
-        semesterRepository = SemesterRepository(semesterRemote, semesterLocal, settings, apiHelper)
+        semesterRepository = SemesterRepository(semesterRemote, semesterLocal, settings, sdkHelper)
     }
 
     @Test
@@ -48,7 +48,7 @@ class SemesterRepositoryTest {
             createSemesterEntity(true)
         )
 
-        doNothing().`when`(apiHelper).initApi(student)
+        doNothing().`when`(sdkHelper).init(student)
         doReturn(Maybe.empty<Semester>()).`when`(semesterLocal).getSemesters(student)
         doReturn(Single.just(semesters)).`when`(semesterRemote).getSemesters(student)
 
@@ -65,7 +65,7 @@ class SemesterRepositoryTest {
             createSemesterEntity(true)
         )
 
-        doNothing().`when`(apiHelper).initApi(student)
+        doNothing().`when`(sdkHelper).init(student)
         doReturn(Maybe.empty<Semester>()).`when`(semesterLocal).getSemesters(student)
         doReturn(Single.just(semesters)).`when`(semesterRemote).getSemesters(student)
 
diff --git a/app/src/test/java/io/github/wulkanowy/data/repositories/student/StudentRemoteTest.kt b/app/src/test/java/io/github/wulkanowy/data/repositories/student/StudentRemoteTest.kt
index 4d7b23ebd..f52c01424 100644
--- a/app/src/test/java/io/github/wulkanowy/data/repositories/student/StudentRemoteTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/data/repositories/student/StudentRemoteTest.kt
@@ -1,19 +1,23 @@
 package io.github.wulkanowy.data.repositories.student
 
-import io.github.wulkanowy.api.Api
-import io.github.wulkanowy.api.register.Student
+import io.github.wulkanowy.data.SdkHelper
+import io.github.wulkanowy.sdk.Sdk
+import io.github.wulkanowy.sdk.pojo.Student
+import io.mockk.impl.annotations.SpyK
 import io.reactivex.Single
 import org.junit.Assert.assertEquals
 import org.junit.Before
 import org.junit.Test
 import org.mockito.Mock
+import org.mockito.Mockito.anyBoolean
+import org.mockito.Mockito.anyString
 import org.mockito.Mockito.doReturn
 import org.mockito.MockitoAnnotations
 
 class StudentRemoteTest {
 
     @Mock
-    private lateinit var mockApi: Api
+    private lateinit var mockSdk: Sdk
 
     @Before
     fun initApi() {
@@ -22,11 +26,31 @@ class StudentRemoteTest {
 
     @Test
     fun testRemoteAll() {
-        doReturn(Single.just(listOf(Student("", "", 1, "test", "", "", "", 1, Api.LoginType.AUTO))))
-            .`when`(mockApi).getStudents()
+        doReturn(Single.just(listOf(getStudent("test")))).`when`(mockSdk).getStudentsFromScrapper(anyString(), anyString(), anyString(), anyString())
 
-        val students = StudentRemote(mockApi).getStudents("", "", "").blockingGet()
+        val students = StudentRemote(mockSdk).getStudentsScrapper("", "", "http://fakelog.cf", "").blockingGet()
         assertEquals(1, students.size)
         assertEquals("test", students.first().studentName)
     }
+
+    private fun getStudent(name: String): Student {
+        return Student(
+            email = "",
+            symbol = "",
+            studentId = 0,
+            userLoginId = 0,
+            studentName = name,
+            schoolSymbol = "",
+            schoolName = "",
+            className = "",
+            classId = 0,
+            certificateKey = "",
+            privateKey = "",
+            loginMode = Sdk.Mode.SCRAPPER,
+            mobileBaseUrl = "",
+            loginType = Sdk.ScrapperLoginType.STANDARD,
+            scrapperBaseUrl = "",
+            isParent = false
+        )
+    }
 }
diff --git a/app/src/test/java/io/github/wulkanowy/data/repositories/timetable/TimetableRemoteTest.kt b/app/src/test/java/io/github/wulkanowy/data/repositories/timetable/TimetableRemoteTest.kt
index 4bb4091fb..100bc0aed 100644
--- a/app/src/test/java/io/github/wulkanowy/data/repositories/timetable/TimetableRemoteTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/data/repositories/timetable/TimetableRemoteTest.kt
@@ -1,24 +1,23 @@
 package io.github.wulkanowy.data.repositories.timetable
 
-import io.github.wulkanowy.api.Api
-import io.github.wulkanowy.api.timetable.Timetable
 import io.github.wulkanowy.data.db.entities.Semester
-import io.github.wulkanowy.data.repositories.timetable.TimetableRemote
+import io.github.wulkanowy.sdk.Sdk
+import io.github.wulkanowy.sdk.pojo.Timetable
 import io.mockk.MockKAnnotations
 import io.mockk.every
 import io.mockk.impl.annotations.MockK
-import io.mockk.impl.annotations.SpyK
 import io.reactivex.Single
 import org.junit.Assert.assertEquals
 import org.junit.Before
 import org.junit.Test
 import org.threeten.bp.LocalDate
-import java.sql.Date
+import org.threeten.bp.LocalDate.of
+import org.threeten.bp.LocalDateTime.now
 
 class TimetableRemoteTest {
 
-    @SpyK
-    private var mockApi = Api()
+    @MockK
+    private lateinit var mockSdk: Sdk
 
     @MockK
     private lateinit var semesterMock: Semester
@@ -30,26 +29,46 @@ class TimetableRemoteTest {
 
     @Test
     fun getTimetableTest() {
-        every { mockApi.getTimetable(
-                LocalDate.of(2018, 9, 10),
-                LocalDate.of(2018, 9, 15)
-        ) } returns Single.just(listOf(
-                getTimetable("2018-09-10"),
-                getTimetable("2018-09-17")
+        every {
+            mockSdk.getTimetable(
+                of(2018, 9, 10),
+                of(2018, 9, 15)
+            )
+        } returns Single.just(listOf(
+            getTimetable(of(2018, 9, 10)),
+            getTimetable(of(2018, 9, 17))
         ))
 
-        every { mockApi.diaryId } returns 1
         every { semesterMock.studentId } returns 1
         every { semesterMock.diaryId } returns 1
+        every { semesterMock.schoolYear } returns 2019
+        every { semesterMock.semesterId } returns 1
+        every { mockSdk.switchDiary(any(), any()) } returns mockSdk
 
-        val timetable = TimetableRemote(mockApi).getTimetable(semesterMock,
-                LocalDate.of(2018, 9, 10),
-                LocalDate.of(2018, 9, 15)
+        val timetable = TimetableRemote(mockSdk).getTimetable(semesterMock,
+            of(2018, 9, 10),
+            of(2018, 9, 15)
         ).blockingGet()
         assertEquals(2, timetable.size)
     }
 
-    private fun getTimetable(dateString: String): Timetable {
-        return Timetable(date = Date.valueOf(dateString))
+    private fun getTimetable(date: LocalDate): Timetable {
+        return Timetable(
+            date = date,
+            number = 0,
+            teacherOld = "",
+            subjectOld = "",
+            roomOld = "",
+            subject = "",
+            teacher = "",
+            group = "",
+            canceled = false,
+            changes = false,
+            info = "",
+            room = "",
+            end = now(),
+            start = now(),
+            studentPlan = true
+        )
     }
 }
diff --git a/app/src/test/java/io/github/wulkanowy/ui/modules/grade/GradeAverageProviderTest.kt b/app/src/test/java/io/github/wulkanowy/ui/modules/grade/GradeAverageProviderTest.kt
new file mode 100644
index 000000000..56b1e66f8
--- /dev/null
+++ b/app/src/test/java/io/github/wulkanowy/ui/modules/grade/GradeAverageProviderTest.kt
@@ -0,0 +1,237 @@
+package io.github.wulkanowy.ui.modules.grade
+
+import io.github.wulkanowy.data.db.entities.Grade
+import io.github.wulkanowy.data.db.entities.GradeSummary
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.data.repositories.grade.GradeRepository
+import io.github.wulkanowy.data.repositories.gradessummary.GradeSummaryRepository
+import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
+import io.github.wulkanowy.sdk.Sdk
+import io.reactivex.Single
+import org.junit.Assert.assertEquals
+import org.junit.Before
+import org.junit.Test
+import org.mockito.Mock
+import org.mockito.Mockito.doReturn
+import org.mockito.MockitoAnnotations
+import org.threeten.bp.LocalDate.now
+import org.threeten.bp.LocalDateTime
+
+class GradeAverageProviderTest {
+
+    @Mock
+    lateinit var preferencesRepository: PreferencesRepository
+
+    @Mock
+    lateinit var gradeRepository: GradeRepository
+
+    @Mock
+    lateinit var gradeSummaryRepository: GradeSummaryRepository
+
+    private lateinit var gradeAverageProvider: GradeAverageProvider
+
+    private val student = Student("", "", "", "SCRAPPER", "", "", false, "", "", "", 101, 0, "", "", "", "", 1, true, LocalDateTime.now())
+
+    private val semesters = mutableListOf(
+        Semester(101, 10, "", 1, 21, 1, false, now(), now(), 1, 1),
+        Semester(101, 11, "", 1, 22, 1, false, now(), now(), 1, 1),
+        Semester(101, 11, "", 1, 23, 2, true, now(), now(), 1, 1)
+    )
+
+    private val firstGrades = listOf(
+        getGrade(22, "Matematyka", 4.0),
+        getGrade(22, "Matematyka", 3.0),
+        getGrade(22, "Fizyka", 6.0),
+        getGrade(22, "Fizyka", 1.0)
+    )
+
+    private val secondGrade = listOf(
+        getGrade(23, "Matematyka", 2.0),
+        getGrade(23, "Matematyka", 3.0),
+        getGrade(23, "Fizyka", 4.0),
+        getGrade(23, "Fizyka", 2.0)
+    )
+
+    private val secondGradeWithModifier = listOf(
+        getGrade(24, "Język polski", 3.0, -0.50),
+        getGrade(24, "Język polski", 4.0, 0.25)
+    )
+
+    @Before
+    fun initTest() {
+        MockitoAnnotations.initMocks(this)
+        gradeAverageProvider = GradeAverageProvider(preferencesRepository, gradeRepository, gradeSummaryRepository)
+
+        doReturn(.33).`when`(preferencesRepository).gradeMinusModifier
+        doReturn(.33).`when`(preferencesRepository).gradePlusModifier
+        doReturn(false).`when`(preferencesRepository).gradeAverageForceCalc
+
+        doReturn(Single.just(firstGrades)).`when`(gradeRepository).getGrades(student, semesters[1], true)
+        doReturn(Single.just(secondGrade)).`when`(gradeRepository).getGrades(student, semesters[2], true)
+    }
+
+    @Test
+    fun onlyOneSemesterTest() {
+        doReturn("only_one_semester").`when`(preferencesRepository).gradeAverageMode
+        doReturn(Single.just(emptyList<GradeSummary>())).`when`(gradeSummaryRepository).getGradesSummary(semesters[2], true)
+
+        val averages = gradeAverageProvider.getGradeAverage(student, semesters, semesters[2].semesterId, true)
+            .blockingGet()
+
+        assertEquals(2, averages.size)
+        assertEquals(2.5, averages["Matematyka"])
+        assertEquals(3.0, averages["Fizyka"])
+    }
+
+    @Test
+    fun onlyOneSemester_gradesWithModifiers_default() {
+        doReturn("only_one_semester").`when`(preferencesRepository).gradeAverageMode
+        doReturn(Single.just(emptyList<GradeSummary>())).`when`(gradeSummaryRepository).getGradesSummary(semesters[2], true)
+        doReturn(Single.just(secondGradeWithModifier)).`when`(gradeRepository).getGrades(student, semesters[2], true)
+
+        val averages = gradeAverageProvider.getGradeAverage(student, semesters, semesters[2].semesterId, true)
+            .blockingGet()
+
+        assertEquals(3.5, averages["Język polski"])
+    }
+
+    @Test
+    fun onlyOneSemester_gradesWithModifiers_api() {
+        doReturn("only_one_semester").`when`(preferencesRepository).gradeAverageMode
+        doReturn(Single.just(emptyList<GradeSummary>())).`when`(gradeSummaryRepository).getGradesSummary(semesters[2], true)
+        doReturn(Single.just(secondGradeWithModifier)).`when`(gradeRepository).getGrades(student.copy(loginMode = Sdk.Mode.API.name), semesters[2], true)
+
+        val averages = gradeAverageProvider.getGradeAverage(student.copy(loginMode = Sdk.Mode.API.name), semesters, semesters[2].semesterId, true)
+            .blockingGet()
+
+        assertEquals(3.375, averages["Język polski"])
+    }
+
+    @Test
+    fun onlyOneSemester_gradesWithModifiers_scrapper() {
+        doReturn("only_one_semester").`when`(preferencesRepository).gradeAverageMode
+        doReturn(Single.just(emptyList<GradeSummary>())).`when`(gradeSummaryRepository).getGradesSummary(semesters[2], true)
+        doReturn(Single.just(secondGradeWithModifier)).`when`(gradeRepository).getGrades(student.copy(loginMode = Sdk.Mode.SCRAPPER.name), semesters[2], true)
+
+        val averages = gradeAverageProvider.getGradeAverage(student.copy(loginMode = Sdk.Mode.SCRAPPER.name), semesters, semesters[2].semesterId, true)
+            .blockingGet()
+
+        assertEquals(3.5, averages["Język polski"])
+    }
+
+    @Test
+    fun onlyOneSemester_gradesWithModifiers_hybrid() {
+        doReturn("only_one_semester").`when`(preferencesRepository).gradeAverageMode
+        doReturn(Single.just(emptyList<GradeSummary>())).`when`(gradeSummaryRepository).getGradesSummary(semesters[2], true)
+        doReturn(Single.just(secondGradeWithModifier)).`when`(gradeRepository).getGrades(student.copy(loginMode = Sdk.Mode.HYBRID.name), semesters[2], true)
+
+        val averages = gradeAverageProvider.getGradeAverage(student.copy(loginMode = Sdk.Mode.HYBRID.name), semesters, semesters[2].semesterId, true)
+            .blockingGet()
+
+        assertEquals(3.375, averages["Język polski"])
+    }
+
+    @Test
+    fun allYearFirstSemesterTest() {
+        doReturn("all_year").`when`(preferencesRepository).gradeAverageMode
+        doReturn(Single.just(emptyList<GradeSummary>())).`when`(gradeSummaryRepository).getGradesSummary(semesters[1], true)
+
+        val averages = gradeAverageProvider.getGradeAverage(student, semesters, semesters[1].semesterId, true)
+            .blockingGet()
+
+        assertEquals(2, averages.size)
+        assertEquals(3.5, averages["Matematyka"])
+        assertEquals(3.5, averages["Fizyka"])
+    }
+
+    @Test
+    fun allYearSecondSemesterTest() {
+        doReturn("all_year").`when`(preferencesRepository).gradeAverageMode
+        doReturn(Single.just(firstGrades)).`when`(gradeRepository).getGrades(student, semesters[1], false)
+        doReturn(Single.just(emptyList<GradeSummary>())).`when`(gradeSummaryRepository).getGradesSummary(semesters[2], true)
+
+        val averages = gradeAverageProvider.getGradeAverage(student, semesters, semesters[2].semesterId, true)
+            .blockingGet()
+
+        assertEquals(2, averages.size)
+        assertEquals(3.0, averages["Matematyka"])
+        assertEquals(3.25, averages["Fizyka"])
+    }
+
+    @Test(expected = IllegalArgumentException::class)
+    fun incorrectAverageModeTest() {
+        doReturn("test_mode").`when`(preferencesRepository).gradeAverageMode
+
+        gradeAverageProvider.getGradeAverage(student, semesters, semesters[2].semesterId, true).blockingGet()
+    }
+
+    @Test
+    fun onlyOneSemester_averageFromSummary() {
+        doReturn("all_year").`when`(preferencesRepository).gradeAverageMode
+        doReturn(Single.just(firstGrades)).`when`(gradeRepository).getGrades(student, semesters[1], false)
+        doReturn(Single.just(listOf(
+            getSummary(22, "Matematyka", 3.1),
+            getSummary(22, "Fizyka", 3.26)
+        ))).`when`(gradeSummaryRepository).getGradesSummary(semesters[2], true)
+
+        val averages = gradeAverageProvider.getGradeAverage(student, semesters, semesters[2].semesterId, true)
+            .blockingGet()
+
+        assertEquals(2, averages.size)
+        assertEquals(3.1, averages["Matematyka"])
+        assertEquals(3.26, averages["Fizyka"])
+    }
+
+    @Test
+    fun onlyOneSemester_averageFromSummary_forceCalc() {
+        doReturn(true).`when`(preferencesRepository).gradeAverageForceCalc
+        doReturn("all_year").`when`(preferencesRepository).gradeAverageMode
+        doReturn(Single.just(firstGrades)).`when`(gradeRepository).getGrades(student, semesters[1], false)
+        doReturn(Single.just(listOf(
+            getSummary(22, "Matematyka", 3.1),
+            getSummary(22, "Fizyka", 3.26)
+        ))).`when`(gradeSummaryRepository).getGradesSummary(semesters[2], true)
+
+        val averages = gradeAverageProvider.getGradeAverage(student, semesters, semesters[2].semesterId, true)
+            .blockingGet()
+
+        assertEquals(2, averages.size)
+        assertEquals(3.0, averages["Matematyka"])
+        assertEquals(3.25, averages["Fizyka"])
+    }
+
+    private fun getGrade(semesterId: Int, subject: String, value: Double, modifier: Double = 0.0): Grade {
+        return Grade(
+            studentId = 101,
+            semesterId = semesterId,
+            subject = subject,
+            value = value,
+            modifier = modifier,
+            weightValue = 1.0,
+            teacher = "",
+            date = now(),
+            weight = "",
+            gradeSymbol = "",
+            entry = "",
+            description = "",
+            comment = "",
+            color = ""
+        )
+    }
+
+    private fun getSummary(semesterId: Int, subject: String, value: Double): GradeSummary {
+        return GradeSummary(
+            studentId = 101,
+            semesterId = semesterId,
+            subject = subject,
+            average = value,
+            pointsSum = "",
+            proposedPoints = "",
+            finalPoints = "",
+            finalGrade = "",
+            predictedGrade = "",
+            position = 0
+        )
+    }
+}
diff --git a/app/src/test/java/io/github/wulkanowy/ui/modules/login/LoginPresenterTest.kt b/app/src/test/java/io/github/wulkanowy/ui/modules/login/LoginPresenterTest.kt
index 54b3b8792..4ef5904fb 100644
--- a/app/src/test/java/io/github/wulkanowy/ui/modules/login/LoginPresenterTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/ui/modules/login/LoginPresenterTest.kt
@@ -1,5 +1,7 @@
 package io.github.wulkanowy.ui.modules.login
 
+import io.github.wulkanowy.TestSchedulersProvider
+import io.github.wulkanowy.data.repositories.student.StudentRepository
 import org.junit.Assert.assertNotEquals
 import org.junit.Before
 import org.junit.Test
@@ -17,6 +19,9 @@ class LoginPresenterTest {
     @Mock
     lateinit var errorHandler: LoginErrorHandler
 
+    @Mock
+    lateinit var studentRepository: StudentRepository
+
     private lateinit var presenter: LoginPresenter
 
     @Before
@@ -24,13 +29,13 @@ class LoginPresenterTest {
         MockitoAnnotations.initMocks(this)
         clearInvocations(loginView)
 
-        presenter = LoginPresenter(errorHandler)
+        presenter = LoginPresenter(TestSchedulersProvider(), errorHandler, studentRepository)
         presenter.onAttachView(loginView)
     }
 
     @Test
     fun initViewTest() {
-        verify(loginView).initAdapter()
+        verify(loginView).initView()
         verify(loginView).showActionBar(false)
     }
 
diff --git a/app/src/test/java/io/github/wulkanowy/ui/modules/login/form/LoginFormPresenterTest.kt b/app/src/test/java/io/github/wulkanowy/ui/modules/login/form/LoginFormPresenterTest.kt
index 83047e02b..be99d4d46 100644
--- a/app/src/test/java/io/github/wulkanowy/ui/modules/login/form/LoginFormPresenterTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/ui/modules/login/form/LoginFormPresenterTest.kt
@@ -4,6 +4,7 @@ import io.github.wulkanowy.TestSchedulersProvider
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.modules.login.LoginErrorHandler
+import io.github.wulkanowy.utils.AppInfo
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.reactivex.Single
 import org.junit.Before
@@ -33,13 +34,16 @@ class LoginFormPresenterTest {
     @Mock
     lateinit var analytics: FirebaseAnalyticsHelper
 
+    @Mock
+    lateinit var appInfo: AppInfo
+
     private lateinit var presenter: LoginFormPresenter
 
     @Before
     fun initPresenter() {
         MockitoAnnotations.initMocks(this)
         clearInvocations(repository, loginFormView)
-        presenter = LoginFormPresenter(TestSchedulersProvider(), errorHandler, repository, analytics, false)
+        presenter = LoginFormPresenter(TestSchedulersProvider(), repository, errorHandler, analytics)
         presenter.onAttachView(loginFormView)
     }
 
@@ -53,7 +57,7 @@ class LoginFormPresenterTest {
         `when`(loginFormView.formNameValue).thenReturn("")
         `when`(loginFormView.formPassValue).thenReturn("test123")
         `when`(loginFormView.formHostValue).thenReturn("https://fakelog.cf")
-        presenter.attemptLogin()
+        presenter.onSignInClick()
 
         verify(loginFormView).setErrorNameRequired()
         verify(loginFormView, never()).setErrorPassRequired(false)
@@ -65,7 +69,7 @@ class LoginFormPresenterTest {
         `when`(loginFormView.formNameValue).thenReturn("@")
         `when`(loginFormView.formPassValue).thenReturn("")
         `when`(loginFormView.formHostValue).thenReturn("https://fakelog.cf")
-        presenter.attemptLogin()
+        presenter.onSignInClick()
 
         verify(loginFormView, never()).setErrorNameRequired()
         verify(loginFormView).setErrorPassRequired(true)
@@ -77,7 +81,7 @@ class LoginFormPresenterTest {
         `when`(loginFormView.formNameValue).thenReturn("@")
         `when`(loginFormView.formPassValue).thenReturn("123")
         `when`(loginFormView.formHostValue).thenReturn("https://fakelog.cf")
-        presenter.attemptLogin()
+        presenter.onSignInClick()
 
         verify(loginFormView, never()).setErrorNameRequired()
         verify(loginFormView, never()).setErrorPassRequired(true)
@@ -86,14 +90,13 @@ class LoginFormPresenterTest {
 
     @Test
     fun loginTest() {
-        val studentTest = Student(email = "test@", password = "123", endpoint = "https://fakelog.cf", loginType = "AUTO", studentName = "", schoolSymbol = "", schoolName = "", studentId = 0, classId = 1, isCurrent = false, symbol = "", registrationDate = now(), className = "")
-        doReturn(Single.just(listOf(studentTest)))
-            .`when`(repository).getStudents(anyString(), anyString(), anyString(), anyString())
+        val studentTest = Student(email = "test@", password = "123", scrapperBaseUrl = "https://fakelog.cf", loginType = "AUTO", studentName = "", schoolSymbol = "", schoolName = "", studentId = 0, classId = 1, isCurrent = false, symbol = "", registrationDate = now(), className = "", mobileBaseUrl = "", privateKey = "", certificateKey = "", loginMode = "", userLoginId = 0, isParent = false)
+        doReturn(Single.just(listOf(studentTest))).`when`(repository).getStudentsScrapper(anyString(), anyString(), anyString(), anyString())
 
         `when`(loginFormView.formNameValue).thenReturn("@")
         `when`(loginFormView.formPassValue).thenReturn("123456")
         `when`(loginFormView.formHostValue).thenReturn("https://fakelog.cf")
-        presenter.attemptLogin()
+        presenter.onSignInClick()
 
         verify(loginFormView).hideSoftKeyboard()
         verify(loginFormView).showProgress(true)
@@ -105,11 +108,11 @@ class LoginFormPresenterTest {
     @Test
     fun loginEmptyTest() {
         doReturn(Single.just(emptyList<Student>()))
-            .`when`(repository).getStudents(anyString(), anyString(), anyString(), anyString())
+            .`when`(repository).getStudentsScrapper(anyString(), anyString(), anyString(), anyString())
         `when`(loginFormView.formNameValue).thenReturn("@")
         `when`(loginFormView.formPassValue).thenReturn("123456")
         `when`(loginFormView.formHostValue).thenReturn("https://fakelog.cf")
-        presenter.attemptLogin()
+        presenter.onSignInClick()
 
         verify(loginFormView).hideSoftKeyboard()
         verify(loginFormView).showProgress(true)
@@ -121,12 +124,12 @@ class LoginFormPresenterTest {
     @Test
     fun loginEmptyTwiceTest() {
         doReturn(Single.just(emptyList<Student>()))
-            .`when`(repository).getStudents(anyString(), anyString(), anyString(), anyString())
+            .`when`(repository).getStudentsScrapper(anyString(), anyString(), anyString(), anyString())
         `when`(loginFormView.formNameValue).thenReturn("@")
         `when`(loginFormView.formPassValue).thenReturn("123456")
         `when`(loginFormView.formHostValue).thenReturn("https://fakelog.cf")
-        presenter.attemptLogin()
-        presenter.attemptLogin()
+        presenter.onSignInClick()
+        presenter.onSignInClick()
 
         verify(loginFormView, times(2)).hideSoftKeyboard()
         verify(loginFormView, times(2)).showProgress(true)
@@ -138,12 +141,11 @@ class LoginFormPresenterTest {
     @Test
     fun loginErrorTest() {
         val testException = RuntimeException("test")
-        doReturn(Single.error<List<Student>>(testException))
-            .`when`(repository).getStudents(anyString(), anyString(), anyString(), anyString())
+        doReturn(Single.error<List<Student>>(testException)).`when`(repository).getStudentsScrapper(anyString(), anyString(), anyString(), anyString())
         `when`(loginFormView.formNameValue).thenReturn("@")
         `when`(loginFormView.formPassValue).thenReturn("123456")
         `when`(loginFormView.formHostValue).thenReturn("https://fakelog.cf")
-        presenter.attemptLogin()
+        presenter.onSignInClick()
 
         verify(loginFormView).hideSoftKeyboard()
         verify(loginFormView).showProgress(true)
@@ -153,4 +155,3 @@ class LoginFormPresenterTest {
         verify(errorHandler).dispatch(testException)
     }
 }
-
diff --git a/app/src/test/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectPresenterTest.kt b/app/src/test/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectPresenterTest.kt
index 192602b78..2c174fb58 100644
--- a/app/src/test/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectPresenterTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectPresenterTest.kt
@@ -32,7 +32,7 @@ class LoginStudentSelectPresenterTest {
 
     private lateinit var presenter: LoginStudentSelectPresenter
 
-    private val testStudent by lazy { Student(email = "test", password = "test123", endpoint = "https://fakelog.cf", loginType = "AUTO", symbol = "", isCurrent = false, studentId = 0, schoolName = "", schoolSymbol = "", classId = 1, studentName = "", registrationDate = now(), className = "") }
+    private val testStudent by lazy { Student(email = "test", password = "test123", scrapperBaseUrl = "https://fakelog.cf", loginType = "AUTO", symbol = "", isCurrent = false, studentId = 0, schoolName = "", schoolSymbol = "", classId = 1, studentName = "", registrationDate = now(), className = "", loginMode = "", certificateKey = "", privateKey = "", mobileBaseUrl = "", userLoginId = 1, isParent = false) }
 
     private val testException by lazy { RuntimeException("Problem") }
 
@@ -40,7 +40,7 @@ class LoginStudentSelectPresenterTest {
     fun initPresenter() {
         MockitoAnnotations.initMocks(this)
         clearInvocations(studentRepository, loginStudentSelectView)
-        presenter = LoginStudentSelectPresenter(errorHandler, studentRepository, TestSchedulersProvider(), analytics)
+        presenter = LoginStudentSelectPresenter(TestSchedulersProvider(), studentRepository, errorHandler, analytics)
         presenter.onAttachView(loginStudentSelectView, null)
     }
 
@@ -51,9 +51,10 @@ class LoginStudentSelectPresenterTest {
 
     @Test
     fun onSelectedStudentTest() {
-        doReturn(Single.just(1L)).`when`(studentRepository).saveStudent(testStudent)
+        doReturn(Single.just(listOf(1L))).`when`(studentRepository).saveStudents(listOf(testStudent))
         doReturn(Completable.complete()).`when`(studentRepository).switchStudent(testStudent)
         presenter.onItemSelected(LoginStudentSelectItem(testStudent))
+        presenter.onSignIn()
         verify(loginStudentSelectView).showContent(false)
         verify(loginStudentSelectView).showProgress(true)
         verify(loginStudentSelectView).openMainView()
@@ -61,9 +62,10 @@ class LoginStudentSelectPresenterTest {
 
     @Test
     fun onSelectedStudentErrorTest() {
-        doReturn(Single.error<Student>(testException)).`when`(studentRepository).saveStudent(testStudent)
+        doReturn(Single.error<Student>(testException)).`when`(studentRepository).saveStudents(listOf(testStudent))
         doReturn(Completable.complete()).`when`(studentRepository).logoutStudent(testStudent)
         presenter.onItemSelected(LoginStudentSelectItem(testStudent))
+        presenter.onSignIn()
         verify(loginStudentSelectView).showContent(false)
         verify(loginStudentSelectView).showProgress(true)
         verify(errorHandler).dispatch(testException)
diff --git a/app/src/test/java/io/github/wulkanowy/ui/modules/main/MainPresenterTest.kt b/app/src/test/java/io/github/wulkanowy/ui/modules/main/MainPresenterTest.kt
index f7c5559dd..936098970 100644
--- a/app/src/test/java/io/github/wulkanowy/ui/modules/main/MainPresenterTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/ui/modules/main/MainPresenterTest.kt
@@ -40,8 +40,8 @@ class MainPresenterTest {
         MockitoAnnotations.initMocks(this)
         clearInvocations(mainView)
 
-        presenter = MainPresenter(errorHandler, studentRepository, prefRepository, syncManager, TestSchedulersProvider(), analytics)
-        presenter.onAttachView(mainView, -1)
+        presenter = MainPresenter(TestSchedulersProvider(), errorHandler, studentRepository, prefRepository, syncManager, analytics)
+        presenter.onAttachView(mainView, null)
     }
 
     @Test
diff --git a/app/src/test/java/io/github/wulkanowy/ui/modules/message/send/TestRecipientChip.kt b/app/src/test/java/io/github/wulkanowy/ui/modules/message/send/TestRecipientChip.kt
deleted file mode 100644
index 943fb1902..000000000
--- a/app/src/test/java/io/github/wulkanowy/ui/modules/message/send/TestRecipientChip.kt
+++ /dev/null
@@ -1,20 +0,0 @@
-package io.github.wulkanowy.ui.modules.message.send
-
-import io.github.wulkanowy.data.db.entities.Recipient
-import org.junit.Assert.assertEquals
-import org.junit.Test
-
-class TestRecipientChip {
-
-    @Test
-    fun testRecipientChipInfo() {
-        assertEquals("Uczeń", getRecipientChip("Kowalski Jan - Uczeń").info)
-        assertEquals("(JK) - pracownik [Fake123456]", getRecipientChip("Kowalski Jan (JK) - pracownik [Fake123456]").info)
-        assertEquals("[KK] - pracownik (Fake123456)", getRecipientChip("Kowalska Karolina [KK] - pracownik (Fake123456)").info)
-        assertEquals("(BK) - Nauczyciel [Fake123456]", getRecipientChip("Kowal-Mazur Barbara (BK) - Nauczyciel [Fake123456]").info)
-    }
-
-    private fun getRecipientChip(realName: String): RecipientChip {
-        return RecipientChip(Recipient(0, "", "", realName, 0, 0, 0, ""))
-    }
-}
diff --git a/app/src/test/java/io/github/wulkanowy/ui/modules/splash/SplashPresenterTest.kt b/app/src/test/java/io/github/wulkanowy/ui/modules/splash/SplashPresenterTest.kt
index fc25c0953..34d0ce5cb 100644
--- a/app/src/test/java/io/github/wulkanowy/ui/modules/splash/SplashPresenterTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/ui/modules/splash/SplashPresenterTest.kt
@@ -27,19 +27,19 @@ class SplashPresenterTest {
     @Before
     fun initPresenter() {
         MockitoAnnotations.initMocks(this)
-        presenter = SplashPresenter(studentRepository, errorHandler, TestSchedulersProvider())
+        presenter = SplashPresenter(TestSchedulersProvider(), errorHandler, studentRepository)
     }
 
     @Test
     fun testOpenLoginView() {
-        doReturn(Single.just(false)).`when`(studentRepository).isStudentSaved()
+        doReturn(Single.just(false)).`when`(studentRepository).isCurrentStudentSet()
         presenter.onAttachView(splashView)
         verify(splashView).openLoginView()
     }
 
     @Test
     fun testMainMainView() {
-        doReturn(Single.just(true)).`when`(studentRepository).isStudentSaved()
+        doReturn(Single.just(true)).`when`(studentRepository).isCurrentStudentSet()
         presenter.onAttachView(splashView)
         verify(splashView).openMainView()
     }
diff --git a/app/src/test/java/io/github/wulkanowy/utils/GradeExtensionTest.kt b/app/src/test/java/io/github/wulkanowy/utils/GradeExtensionTest.kt
index 3b1ab648c..ece7acf20 100644
--- a/app/src/test/java/io/github/wulkanowy/utils/GradeExtensionTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/utils/GradeExtensionTest.kt
@@ -1,5 +1,6 @@
 package io.github.wulkanowy.utils
 
+import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Grade
 import io.github.wulkanowy.data.db.entities.GradeSummary
 import org.junit.Assert.assertEquals
@@ -22,43 +23,51 @@ class GradeExtensionTest {
     @Test
     fun calcWeightedAverage() {
         assertEquals(3.47, listOf(
-            createGrade(5, 6.0, 0.33),
-            createGrade(5, 5.0, -0.33),
-            createGrade(4, 1.0, 0.0),
-            createGrade(1, 9.0, 0.5),
-            createGrade(0, .0, 0.0)
+            createGrade(5.0, 6.0, 0.33),
+            createGrade(5.0, 5.0, -0.33),
+            createGrade(4.0, 1.0, 0.0),
+            createGrade(1.0, 9.0, 0.5),
+            createGrade(0.0, .0, 0.0)
         ).calcAverage(), 0.005)
     }
 
     @Test
     fun calcSummaryAverage() {
         assertEquals(2.5, listOf(
-            GradeSummary(1, 1, "", "", "5"),
-            GradeSummary(1, 1, "", "", "-5"),
-            GradeSummary(1, 1, "", "", "test"),
-            GradeSummary(1, 1, "", "", "0")
+            createGradeSummary("5"),
+            createGradeSummary("-5"),
+            createGradeSummary("test"),
+            createGradeSummary("0")
         ).calcAverage(), 0.005)
     }
 
     @Test
-    fun changeModifier_default() {
-        assertEquals(.33, createGrade(5, .0, .33).changeModifier(.0, .0).modifier, .0)
-        assertEquals(-.33, createGrade(5, .0, -.33).changeModifier(.0, .0).modifier, .0)
+    fun getBackgroundColor() {
+        assertEquals(R.color.grade_material_five, createGrade(5.0).getBackgroundColor("material"))
+        assertEquals(R.color.grade_material_five, createGrade(5.5).getBackgroundColor("material"))
+        assertEquals(R.color.grade_material_five, createGrade(5.9).getBackgroundColor("material"))
+        assertEquals(R.color.grade_vulcan_five, createGrade(5.9).getBackgroundColor("whatever"))
+    }
+
+    @Test
+    fun changeModifier_zero() {
+        assertEquals(.0, createGrade(5.0, .0, .5).changeModifier(.0, .0).modifier, .0)
+        assertEquals(.0, createGrade(5.0, .0, -.5).changeModifier(.0, .0).modifier, .0)
     }
 
     @Test
     fun changeModifier_plus() {
-        assertEquals(.33, createGrade(5, .0, .25).changeModifier(.33, .50).modifier, .0)
-        assertEquals(.25, createGrade(5, .0, .33).changeModifier(.25, .0).modifier, .0)
+        assertEquals(.33, createGrade(5.0, .0, .25).changeModifier(.33, .50).modifier, .0)
+        assertEquals(.25, createGrade(5.0, .0, .33).changeModifier(.25, .0).modifier, .0)
     }
 
     @Test
     fun changeModifier_minus() {
-        assertEquals(-.33, createGrade(5, .0, -.25).changeModifier(.25, .33).modifier, .0)
-        assertEquals(-.25, createGrade(5, .0, -.33).changeModifier(.0, .25).modifier, .0)
+        assertEquals(-.33, createGrade(5.0, .0, -.25).changeModifier(.25, .33).modifier, .0)
+        assertEquals(-.25, createGrade(5.0, .0, -.33).changeModifier(.0, .25).modifier, .0)
     }
 
-    private fun createGrade(value: Int, weightValue: Double = .0, modifier: Double = 0.25): Grade {
+    private fun createGrade(value: Double, weightValue: Double = .0, modifier: Double = 0.25): Grade {
         return Grade(
             semesterId = 1,
             studentId = 1,
@@ -76,4 +85,19 @@ class GradeExtensionTest {
             teacher = ""
         )
     }
+
+    private fun createGradeSummary(finalGrade: String): GradeSummary {
+        return GradeSummary(
+            semesterId = 1,
+            studentId = 1,
+            position = 0,
+            subject = "",
+            predictedGrade = "",
+            finalGrade = finalGrade,
+            proposedPoints = "",
+            finalPoints = "",
+            pointsSum = "",
+            average = .0
+        )
+    }
 }
diff --git a/app/src/test/java/io/github/wulkanowy/utils/TimeExtensionTest.kt b/app/src/test/java/io/github/wulkanowy/utils/TimeExtensionTest.kt
index 442356dc6..024b4727b 100644
--- a/app/src/test/java/io/github/wulkanowy/utils/TimeExtensionTest.kt
+++ b/app/src/test/java/io/github/wulkanowy/utils/TimeExtensionTest.kt
@@ -4,7 +4,7 @@ import org.junit.Assert.assertEquals
 import org.junit.Assert.assertFalse
 import org.junit.Assert.assertTrue
 import org.junit.Test
-import org.threeten.bp.LocalDate
+import org.threeten.bp.LocalDate.of
 import org.threeten.bp.LocalDateTime
 import org.threeten.bp.Month.JANUARY
 import java.util.Locale
@@ -13,13 +13,13 @@ class TimeExtensionTest {
 
     @Test
     fun toLocalDateTest() {
-        assertEquals(LocalDate.of(1970, 1, 1), "1970-01-01".toLocalDate("yyyy-MM-dd"))
+        assertEquals(of(1970, 1, 1), "1970-01-01".toLocalDate("yyyy-MM-dd"))
     }
 
     @Test
     fun toFormattedStringLocalDateTest() {
-        assertEquals("01.10.2018", LocalDate.of(2018, 10, 1).toFormattedString())
-        assertEquals("2018-10.01", LocalDate.of(2018, 10, 1).toFormattedString("yyyy-MM.dd"))
+        assertEquals("01.10.2018", of(2018, 10, 1).toFormattedString())
+        assertEquals("2018-10.01", of(2018, 10, 1).toFormattedString("yyyy-MM.dd"))
     }
 
     @Test
@@ -30,20 +30,20 @@ class TimeExtensionTest {
 
     @Test
     fun mondayTest() {
-        assertEquals(LocalDate.of(2018, 10, 1), LocalDate.of(2018, 10, 2).monday)
-        assertEquals(LocalDate.of(2018, 10, 1), LocalDate.of(2018, 10, 5).monday)
-        assertEquals(LocalDate.of(2018, 10, 1), LocalDate.of(2018, 10, 6).monday)
-        assertEquals(LocalDate.of(2018, 10, 1), LocalDate.of(2018, 10, 7).monday)
-        assertEquals(LocalDate.of(2018, 10, 8), LocalDate.of(2018, 10, 8).monday)
+        assertEquals(of(2018, 10, 1), of(2018, 10, 2).monday)
+        assertEquals(of(2018, 10, 1), of(2018, 10, 5).monday)
+        assertEquals(of(2018, 10, 1), of(2018, 10, 6).monday)
+        assertEquals(of(2018, 10, 1), of(2018, 10, 7).monday)
+        assertEquals(of(2018, 10, 8), of(2018, 10, 8).monday)
     }
 
     @Test
     fun fridayTest() {
-        assertEquals(LocalDate.of(2018, 10, 5), LocalDate.of(2018, 10, 2).friday)
-        assertEquals(LocalDate.of(2018, 10, 5), LocalDate.of(2018, 10, 5).friday)
-        assertEquals(LocalDate.of(2018, 10, 5), LocalDate.of(2018, 10, 6).friday)
-        assertEquals(LocalDate.of(2018, 10, 5), LocalDate.of(2018, 10, 7).friday)
-        assertEquals(LocalDate.of(2018, 10, 12), LocalDate.of(2018, 10, 8).friday)
+        assertEquals(of(2018, 10, 5), of(2018, 10, 2).friday)
+        assertEquals(of(2018, 10, 5), of(2018, 10, 5).friday)
+        assertEquals(of(2018, 10, 5), of(2018, 10, 6).friday)
+        assertEquals(of(2018, 10, 5), of(2018, 10, 7).friday)
+        assertEquals(of(2018, 10, 12), of(2018, 10, 8).friday)
     }
 
     @Test
@@ -57,106 +57,118 @@ class TimeExtensionTest {
     @Test
     fun weekDayNameTest() {
         Locale.setDefault(Locale.forLanguageTag("PL"))
-        assertEquals("poniedziałek", LocalDate.of(2018, 10, 1).weekDayName)
+        assertEquals("poniedziałek", of(2018, 10, 1).weekDayName)
         Locale.setDefault(Locale.forLanguageTag("US"))
-        assertEquals("Monday", LocalDate.of(2018, 10, 1).weekDayName)
+        assertEquals("Monday", of(2018, 10, 1).weekDayName)
     }
 
     @Test
     fun nextSchoolDayTest() {
-        assertEquals(LocalDate.of(2018, 10, 2), LocalDate.of(2018, 10, 1).nextSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 3), LocalDate.of(2018, 10, 2).nextSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 4), LocalDate.of(2018, 10, 3).nextSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 5), LocalDate.of(2018, 10, 4).nextSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 8), LocalDate.of(2018, 10, 5).nextSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 8), LocalDate.of(2018, 10, 6).nextSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 8), LocalDate.of(2018, 10, 7).nextSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 9), LocalDate.of(2018, 10, 8).nextSchoolDay)
+        assertEquals(of(2018, 10, 2), of(2018, 10, 1).nextSchoolDay)
+        assertEquals(of(2018, 10, 3), of(2018, 10, 2).nextSchoolDay)
+        assertEquals(of(2018, 10, 4), of(2018, 10, 3).nextSchoolDay)
+        assertEquals(of(2018, 10, 5), of(2018, 10, 4).nextSchoolDay)
+        assertEquals(of(2018, 10, 8), of(2018, 10, 5).nextSchoolDay)
+        assertEquals(of(2018, 10, 8), of(2018, 10, 6).nextSchoolDay)
+        assertEquals(of(2018, 10, 8), of(2018, 10, 7).nextSchoolDay)
+        assertEquals(of(2018, 10, 9), of(2018, 10, 8).nextSchoolDay)
     }
 
     @Test
     fun previousSchoolDayTest() {
-        assertEquals(LocalDate.of(2018, 10, 9), LocalDate.of(2018, 10, 10).previousSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 8), LocalDate.of(2018, 10, 9).previousSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 5), LocalDate.of(2018, 10, 8).previousSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 5), LocalDate.of(2018, 10, 7).previousSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 5), LocalDate.of(2018, 10, 6).previousSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 4), LocalDate.of(2018, 10, 5).previousSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 3), LocalDate.of(2018, 10, 4).previousSchoolDay)
+        assertEquals(of(2018, 10, 9), of(2018, 10, 10).previousSchoolDay)
+        assertEquals(of(2018, 10, 8), of(2018, 10, 9).previousSchoolDay)
+        assertEquals(of(2018, 10, 5), of(2018, 10, 8).previousSchoolDay)
+        assertEquals(of(2018, 10, 5), of(2018, 10, 7).previousSchoolDay)
+        assertEquals(of(2018, 10, 5), of(2018, 10, 6).previousSchoolDay)
+        assertEquals(of(2018, 10, 4), of(2018, 10, 5).previousSchoolDay)
+        assertEquals(of(2018, 10, 3), of(2018, 10, 4).previousSchoolDay)
     }
 
     @Test
     fun nextOrSameSchoolDayTest() {
-        assertEquals(LocalDate.of(2018, 9, 28), LocalDate.of(2018, 9, 28).nextOrSameSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 1), LocalDate.of(2018, 9, 29).nextOrSameSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 1), LocalDate.of(2018, 9, 30).nextOrSameSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 1), LocalDate.of(2018, 10, 1).nextOrSameSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 2), LocalDate.of(2018, 10, 2).nextOrSameSchoolDay)
+        assertEquals(of(2018, 9, 28), of(2018, 9, 28).nextOrSameSchoolDay)
+        assertEquals(of(2018, 10, 1), of(2018, 9, 29).nextOrSameSchoolDay)
+        assertEquals(of(2018, 10, 1), of(2018, 9, 30).nextOrSameSchoolDay)
+        assertEquals(of(2018, 10, 1), of(2018, 10, 1).nextOrSameSchoolDay)
+        assertEquals(of(2018, 10, 2), of(2018, 10, 2).nextOrSameSchoolDay)
     }
 
     @Test
     fun previousOrSameSchoolDayTest() {
-        assertEquals(LocalDate.of(2018, 9, 28), LocalDate.of(2018, 9, 28).previousOrSameSchoolDay)
-        assertEquals(LocalDate.of(2018, 9, 28), LocalDate.of(2018, 9, 29).previousOrSameSchoolDay)
-        assertEquals(LocalDate.of(2018, 9, 28), LocalDate.of(2018, 9, 30).previousOrSameSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 1), LocalDate.of(2018, 10, 1).previousOrSameSchoolDay)
-        assertEquals(LocalDate.of(2018, 10, 2), LocalDate.of(2018, 10, 2).previousOrSameSchoolDay)
+        assertEquals(of(2018, 9, 28), of(2018, 9, 28).previousOrSameSchoolDay)
+        assertEquals(of(2018, 9, 28), of(2018, 9, 29).previousOrSameSchoolDay)
+        assertEquals(of(2018, 9, 28), of(2018, 9, 30).previousOrSameSchoolDay)
+        assertEquals(of(2018, 10, 1), of(2018, 10, 1).previousOrSameSchoolDay)
+        assertEquals(of(2018, 10, 2), of(2018, 10, 2).previousOrSameSchoolDay)
     }
 
     @Test
     fun isHolidays_schoolEndTest() {
-        assertFalse(LocalDate.of(2017, 6, 23).isHolidays)
-        assertFalse(LocalDate.of(2018, 6, 22).isHolidays)
-        assertFalse(LocalDate.of(2019, 6, 21).isHolidays)
-        assertFalse(LocalDate.of(2020, 6, 26).isHolidays)
-        assertFalse(LocalDate.of(2021, 6, 25).isHolidays)
-        assertFalse(LocalDate.of(2022, 6, 24).isHolidays)
-        assertFalse(LocalDate.of(2023, 6, 23).isHolidays)
-        assertFalse(LocalDate.of(2024, 6, 21).isHolidays)
-        assertFalse(LocalDate.of(2025, 6, 27).isHolidays)
+        assertFalse(of(2017, 6, 23).isHolidays)
+        assertFalse(of(2018, 6, 22).isHolidays)
+        assertFalse(of(2019, 6, 21).isHolidays)
+        assertFalse(of(2020, 6, 26).isHolidays)
+        assertFalse(of(2021, 6, 25).isHolidays)
+        assertFalse(of(2022, 6, 24).isHolidays)
+        assertFalse(of(2023, 6, 23).isHolidays)
+        assertFalse(of(2024, 6, 21).isHolidays)
+        assertFalse(of(2025, 6, 27).isHolidays)
     }
 
     @Test
     fun isHolidays_holidaysStartTest() {
-        assertTrue(LocalDate.of(2017, 6, 24).isHolidays)
-        assertTrue(LocalDate.of(2018, 6, 23).isHolidays)
-        assertTrue(LocalDate.of(2019, 6, 22).isHolidays)
-        assertTrue(LocalDate.of(2020, 6, 27).isHolidays)
-        assertTrue(LocalDate.of(2021, 6, 26).isHolidays)
-        assertTrue(LocalDate.of(2022, 6, 25).isHolidays)
-        assertTrue(LocalDate.of(2023, 6, 24).isHolidays)
-        assertTrue(LocalDate.of(2024, 6, 22).isHolidays)
-        assertTrue(LocalDate.of(2025, 6, 28).isHolidays)
+        assertTrue(of(2017, 6, 24).isHolidays)
+        assertTrue(of(2018, 6, 23).isHolidays)
+        assertTrue(of(2019, 6, 22).isHolidays)
+        assertTrue(of(2020, 6, 27).isHolidays)
+        assertTrue(of(2021, 6, 26).isHolidays)
+        assertTrue(of(2022, 6, 25).isHolidays)
+        assertTrue(of(2023, 6, 24).isHolidays)
+        assertTrue(of(2024, 6, 22).isHolidays)
+        assertTrue(of(2025, 6, 28).isHolidays)
     }
 
     @Test
     fun isHolidays_holidaysEndTest() {
-        assertTrue(LocalDate.of(2017, 9, 1).isHolidays) // friday
-        assertTrue(LocalDate.of(2017, 9, 2).isHolidays) // saturday
-        assertTrue(LocalDate.of(2017, 9, 3).isHolidays) // sunday
-        assertTrue(LocalDate.of(2018, 9, 1).isHolidays) // saturday
-        assertTrue(LocalDate.of(2018, 9, 2).isHolidays) // sunday
-        assertTrue(LocalDate.of(2019, 9, 1).isHolidays) // sunday
-        assertTrue(LocalDate.of(2020, 8, 31).isHolidays) // monday
-        assertTrue(LocalDate.of(2021, 8, 31).isHolidays) // tuesday
-        assertTrue(LocalDate.of(2022, 8, 31).isHolidays) // wednesday
-        assertTrue(LocalDate.of(2023, 9, 1).isHolidays) // friday
-        assertTrue(LocalDate.of(2023, 9, 2).isHolidays) // saturday
-        assertTrue(LocalDate.of(2023, 9, 3).isHolidays) // sunday
-        assertTrue(LocalDate.of(2024, 9, 1).isHolidays) // sunday
-        assertTrue(LocalDate.of(2025, 8, 31).isHolidays) // sunday
+        assertTrue(of(2017, 9, 1).isHolidays) // friday
+        assertTrue(of(2017, 9, 2).isHolidays) // saturday
+        assertTrue(of(2017, 9, 3).isHolidays) // sunday
+        assertTrue(of(2018, 9, 1).isHolidays) // saturday
+        assertTrue(of(2018, 9, 2).isHolidays) // sunday
+        assertTrue(of(2019, 9, 1).isHolidays) // sunday
+        assertTrue(of(2020, 8, 31).isHolidays) // monday
+        assertTrue(of(2021, 8, 31).isHolidays) // tuesday
+        assertTrue(of(2022, 8, 31).isHolidays) // wednesday
+        assertTrue(of(2023, 9, 1).isHolidays) // friday
+        assertTrue(of(2023, 9, 2).isHolidays) // saturday
+        assertTrue(of(2023, 9, 3).isHolidays) // sunday
+        assertTrue(of(2024, 9, 1).isHolidays) // sunday
+        assertTrue(of(2025, 8, 31).isHolidays) // sunday
     }
 
     @Test
     fun isHolidays_schoolStartTest() {
-        assertFalse(LocalDate.of(2017, 9, 4).isHolidays) // monday
-        assertFalse(LocalDate.of(2018, 9, 3).isHolidays) // monday
-        assertFalse(LocalDate.of(2019, 9, 2).isHolidays) // monday
-        assertFalse(LocalDate.of(2020, 9, 1).isHolidays) // tuesday
-        assertFalse(LocalDate.of(2021, 9, 1).isHolidays) // wednesday
-        assertFalse(LocalDate.of(2022, 9, 1).isHolidays) // thursday
-        assertFalse(LocalDate.of(2023, 9, 4).isHolidays) // monday
-        assertFalse(LocalDate.of(2024, 9, 2).isHolidays) // monday
-        assertFalse(LocalDate.of(2025, 9, 1).isHolidays) // monday
+        assertFalse(of(2017, 9, 4).isHolidays) // monday
+        assertFalse(of(2018, 9, 3).isHolidays) // monday
+        assertFalse(of(2019, 9, 2).isHolidays) // monday
+        assertFalse(of(2020, 9, 1).isHolidays) // tuesday
+        assertFalse(of(2021, 9, 1).isHolidays) // wednesday
+        assertFalse(of(2022, 9, 1).isHolidays) // thursday
+        assertFalse(of(2023, 9, 4).isHolidays) // monday
+        assertFalse(of(2024, 9, 2).isHolidays) // monday
+        assertFalse(of(2025, 9, 1).isHolidays) // monday
+    }
+
+    @Test
+    fun getCorrectedDate_holidays() {
+        assertEquals(of(2019, 6, 21), of(2019, 8, 9).getLastSchoolDayIfHoliday(2018))
+        assertEquals(of(2018, 6, 22), of(2019, 8, 9).getLastSchoolDayIfHoliday(2017))
+    }
+
+    @Test
+    fun getCorrectedDate_schoolYear() {
+        assertEquals(of(2019, 5, 1), of(2019, 5, 1).getLastSchoolDayIfHoliday(2018))
+        assertEquals(of(2018, 5, 1), of(2019, 5, 1).getLastSchoolDayIfHoliday(2017))
     }
 }
diff --git a/app/upload-key-encrypted.jks b/app/upload-key-encrypted.jks
deleted file mode 100644
index 6ad925d83..000000000
Binary files a/app/upload-key-encrypted.jks and /dev/null differ
diff --git a/build.gradle b/build.gradle
index caeca70f2..0843a31a3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.3.21'
+    ext.kotlin_version = '1.3.61'
     repositories {
         mavenCentral()
         google()
@@ -9,11 +9,12 @@ buildscript {
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-        classpath 'com.android.tools.build:gradle:3.3.2'
-        classpath 'com.google.gms:google-services:4.2.0'
-        classpath "io.fabric.tools:gradle:1.27.1"
-        classpath "com.github.triplet.gradle:play-publisher:2.1.0"
-        classpath "org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:2.7"
+        classpath 'com.android.tools.build:gradle:3.5.3'
+        classpath 'com.google.gms:google-services:4.3.3'
+        classpath "io.fabric.tools:gradle:1.31.2"
+        classpath "com.github.triplet.gradle:play-publisher:2.4.2"
+        classpath "org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:2.8.0.1969"
+        classpath "gradle.plugin.com.star-zero.gradle:githook:1.2.0"
     }
 }
 
@@ -34,7 +35,6 @@ allprojects {
         google()
         jcenter()
         maven { url 'https://jitpack.io' }
-        maven { url "https://kotlin.bintray.com/kotlinx/" }
     }
 }
 
diff --git a/gradle.properties b/gradle.properties
index 24e69b6ac..113bb1069 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,9 +1,7 @@
 # Project-wide Gradle settings.
-
 # IDE (e.g. Android Studio) users:
 # Gradle settings configured through the IDE *will override*
 # any settings specified in this file.
-
 # For more details on how to configure your build environment visit
 # http://www.gradle.org/docs/current/userguide/build_environment.html
 
@@ -13,8 +11,9 @@ android.enableJetifier=true
 android.useAndroidX=true
 android.enableR8=true
 org.gradle.jvmargs=-Xmx1536m
+kapt.incremental.apt=true
 
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
-# org.gradle.parallel=true
+# org.gradle.parallel=true
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 13372aef5..5c2d1cf01 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index f95599f57..0ebb3108e 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,5 @@
-#Sun Jan 20 13:58:58 CET 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip
diff --git a/gradlew b/gradlew
index 9d82f7891..83f2acfdc 100755
--- a/gradlew
+++ b/gradlew
@@ -1,4 +1,20 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 
 ##############################################################################
 ##
@@ -6,42 +22,6 @@
 ##
 ##############################################################################
 
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
-
-APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
-
-# Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
-
-warn ( ) {
-    echo "$*"
-}
-
-die ( ) {
-    echo
-    echo "$*"
-    echo
-    exit 1
-}
-
-# OS specific support (must be 'true' or 'false').
-cygwin=false
-msys=false
-darwin=false
-case "`uname`" in
-  CYGWIN* )
-    cygwin=true
-    ;;
-  Darwin* )
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-esac
-
 # Attempt to set APP_HOME
 # Resolve links: $0 may be a link
 PRG="$0"
@@ -60,6 +40,46 @@ cd "`dirname \"$PRG\"`/" >/dev/null
 APP_HOME="`pwd -P`"
 cd "$SAVED" >/dev/null
 
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
 # Determine the Java command to use to start the JVM.
@@ -85,7 +105,7 @@ location of your Java installation."
 fi
 
 # Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
     MAX_FD_LIMIT=`ulimit -H -n`
     if [ $? -eq 0 ] ; then
         if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
@@ -105,8 +125,8 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
     JAVACMD=`cygpath --unix "$JAVACMD"`
@@ -150,11 +170,19 @@ if $cygwin ; then
     esac
 fi
 
-# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
-function splitJvmOpts() {
-    JVM_OPTS=("$@")
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
 }
-eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
-JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+APP_ARGS=$(save "$@")
 
-exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
index 8a0b282aa..24467a141 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -1,90 +1,100 @@
-@if "%DEBUG%" == "" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
-
-set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
-
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto init
-
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:init
-@rem Get command-line arguments, handling Windowz variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-if "%@eval[2+2]" == "4" goto 4NT_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-goto execute
-
-:4NT_args
-@rem Get arguments from the 4NT Shell from JP Software
-set CMD_LINE_ARGS=%$
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
-
-:end
-@rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega