diff --git a/.travis.yml b/.travis.yml
index 5dbd9e36..45818739 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -48,8 +48,8 @@ before_script:
 script:
   - ./gradlew dependencies --stacktrace --daemon
   - fossa --no-ansi || true
-  - ./gradlew -Pcoverage testPlayDebugUnitTest --stacktrace --daemon
-  - ./gradlew -Pcoverage createFdroidDebugCoverageReport --stacktrace --daemon
+  - ./gradlew -Pcoverage testFdroidDebugUnitTest --stacktrace --daemon
+  - ./gradlew -Pcoverage connectedFdroidDebugAndroidTest --stacktrace --daemon
   - ./gradlew -Pcoverage jacocoTestReport --stacktrace --daemon
   - |
     if [ $TRAVIS_TAG ]; then
diff --git a/app/jacoco.gradle b/app/jacoco.gradle
index e9abfb61..a5cf84e6 100644
--- a/app/jacoco.gradle
+++ b/app/jacoco.gradle
@@ -35,13 +35,13 @@ task jacocoTestReport(type: JacocoReport) {
             dir: "$buildDir/intermediates/classes/debug",
             excludes: excludes
     ) + fileTree(
-            dir: "$buildDir/tmp/kotlin-classes/playDebug",
+            dir: "$buildDir/tmp/kotlin-classes/fdroidDebug",
             excludes: excludes
     ))
 
     sourceDirectories.setFrom(files([
             "src/main/java",
-            "src/play/java"
+            "src/fdroid/java"
     ]))
     executionData.setFrom(fileTree(
             dir: project.projectDir,
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 42169ca5..7e287767 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -19,7 +19,7 @@
     <string name="homework_title">Hausaufgaben</string>
     <string name="account_title">Wählen Sie ein Konto</string>
     <!--Subtitles-->
-    <string name="grade_subtitle">Semester %d, %d/%d</string>
+    <string name="grade_subtitle">Semester %1$d, %2$d/%3$d</string>
     <!--Login-->
     <string name="login_header_default">Melden Sie sich mit dem Studenten- oder Elternkonto an</string>
     <string name="login_header_symbol">Geben Sie das Symbol</string>
diff --git a/app/src/main/res/values-pl/strings.xml b/app/src/main/res/values-pl/strings.xml
index ebc14542..bc94b227 100644
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@@ -19,7 +19,7 @@
     <string name="homework_title">Zadania domowe</string>
     <string name="account_title">Wybierz konto</string>
     <!--Subtitles-->
-    <string name="grade_subtitle">Semestr %d, %d/%d</string>
+    <string name="grade_subtitle">Semestr %1$d, %2$d/%3$d</string>
     <!--Login-->
     <string name="login_header_default">Zaloguj się za pomocą konta ucznia lub rodzica</string>
     <string name="login_header_symbol">Podaj symbol</string>
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
index 15c58317..7052fbc9 100644
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@@ -19,7 +19,7 @@
     <string name="homework_title">Домашние задания</string>
     <string name="account_title">Выберите аккаунт</string>
     <!--Subtitles-->
-    <string name="grade_subtitle">%d семестр, %d/%d</string>
+    <string name="grade_subtitle">%1$d семестр, %2$d/%3$d</string>
     <!--Login-->
     <string name="login_header_default">Авторизируйтесь при помощи аккаунта ученика или родителя</string>
     <string name="login_header_symbol">Впишите \"symbol\"</string>
diff --git a/app/src/main/res/values-uk/strings.xml b/app/src/main/res/values-uk/strings.xml
index 423c4e12..15fe203d 100644
--- a/app/src/main/res/values-uk/strings.xml
+++ b/app/src/main/res/values-uk/strings.xml
@@ -19,7 +19,7 @@
     <string name="homework_title">Домашні завдання</string>
     <string name="account_title">Оберіть аккаунт</string>
     <!--Subtitles-->
-    <string name="grade_subtitle">%d семестр, %d/%d</string>
+    <string name="grade_subtitle">%1$d семестр, %2$d/%3$d</string>
     <!--Login-->
     <string name="login_header_default">Авторизуйтеся за допомогою аккаунта учня або батька</string>
     <string name="login_header_symbol">Впишіть \"symbol\"</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 963c7047..7df2b68a 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -21,7 +21,7 @@
 
 
     <!--Subtitles-->
-    <string name="grade_subtitle">Semester %d, %d/%d</string>
+    <string name="grade_subtitle">Semester %1$d, %2$d/%3$d</string>
 
 
     <!--Login-->
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index f3d88b1c..e708b1c0 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 6623300b..33682bbb 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.6.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
index 2fe81a7d..4f906e0c 100755
--- a/gradlew
+++ b/gradlew
@@ -82,6 +82,7 @@ esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
@@ -129,6 +130,7 @@ fi
 if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
     JAVACMD=`cygpath --unix "$JAVACMD"`
 
     # We build the pattern for arguments to be converted via cygpath
diff --git a/gradlew.bat b/gradlew.bat
index 9109989e..ac1b06f9 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -40,7 +40,7 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
+if "%ERRORLEVEL%" == "0" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
@@ -54,7 +54,7 @@ goto fail
 set JAVA_HOME=%JAVA_HOME:"=%
 set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
-if exist "%JAVA_EXE%" goto init
+if exist "%JAVA_EXE%" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
@@ -64,28 +64,14 @@ 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%
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
 
 :end
 @rem End local scope for the variables with windows NT shell