diff --git a/.travis.yml b/.travis.yml
index a430c90ef..e144bdd77 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,10 @@ cache:
     - $HOME/.gradle/caches/
     - $HOME/.gradle/wrapper/
 
+branches:
+  only:
+    - master
+
 android:
  licenses:
     - android-sdk-preview-license-.+
diff --git a/app/build.gradle b/app/build.gradle
index 9325c91c7..5aa3a521a 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -80,7 +80,7 @@ play {
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
-    implementation('io.github.wulkanowy:api:0.6.2') { exclude module: "threetenbp" }
+    implementation('io.github.wulkanowy:api:0.6.3') { exclude module: "threetenbp" }
 
     implementation "androidx.legacy:legacy-support-v4:1.0.0"
     implementation "androidx.appcompat:appcompat:1.0.2"
@@ -118,6 +118,9 @@ dependencies {
     implementation 'com.google.firebase:firebase-core:16.0.6'
     implementation 'com.crashlytics.sdk.android:crashlytics:2.9.8'
 
+    releaseImplementation 'fr.o80.chucker:library-no-op:2.0.3'
+    debugImplementation 'fr.o80.chucker:library:2.0.3'
+
     debugImplementation "com.amitshekhar.android:debug-db:1.0.4"
 
     testImplementation "junit:junit:4.12"
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 10fe53119..2bc7e0a91 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -4,6 +4,8 @@
     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" />
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 3c58ea4bd..f5bb1b2a4 100644
--- a/app/src/main/java/io/github/wulkanowy/data/RepositoryModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/RepositoryModule.kt
@@ -6,10 +6,14 @@ import android.content.res.Resources
 import androidx.preference.PreferenceManager
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
 import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.strategy.SocketInternetObservingStrategy
+import com.readystatesoftware.chuck.api.ChuckCollector
+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.repositories.PreferencesRepository
 import okhttp3.logging.HttpLoggingInterceptor
 import okhttp3.logging.HttpLoggingInterceptor.Level.BASIC
 import okhttp3.logging.HttpLoggingInterceptor.Level.NONE
@@ -30,15 +34,26 @@ internal class RepositoryModule {
 
     @Singleton
     @Provides
-    fun provideApi(): Api {
+    fun provideApi(chuckCollector: ChuckCollector, context: Context): Api {
         return Api().apply {
             logLevel = NONE
             androidVersion = android.os.Build.VERSION.RELEASE
             buildTag = android.os.Build.MODEL
             setInterceptor(HttpLoggingInterceptor(HttpLoggingInterceptor.Logger { Timber.d(it) }).setLevel(BASIC))
+
+            // for debug only
+            setInterceptor(ChuckInterceptor(context, chuckCollector).maxContentLength(250000L), true, 0)
         }
     }
 
+    @Singleton
+    @Provides
+    fun provideChuckCollector(context: Context, prefRepository: PreferencesRepository): ChuckCollector {
+        return ChuckCollector(context)
+            .showNotification(prefRepository.isShowChuckerNotification)
+            .retentionManager(RetentionManager(context, ChuckCollector.Period.ONE_HOUR))
+    }
+
     @Singleton
     @Provides
     fun provideDatabase(context: Context) = AppDatabase.newInstance(context)
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/PreferencesRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/PreferencesRepository.kt
index 205baa3aa..d83ae667d 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/PreferencesRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/PreferencesRepository.kt
@@ -44,4 +44,8 @@ class PreferencesRepository @Inject constructor(
 
     val isNotificationsEnable: Boolean
         get() = sharedPref.getBoolean(context.getString(R.string.pref_key_notifications_enable), true)
+
+    val isShowChuckerNotificationKey: String = context.getString(R.string.pref_key_debug_chucker_notification)
+    val isShowChuckerNotification: Boolean
+        get() = sharedPref.getBoolean(isShowChuckerNotificationKey, false)
 }
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 e0e32e2c8..a8f210e67 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
@@ -1,6 +1,7 @@
 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.ServiceUnavailableException
 import io.github.wulkanowy.api.login.NotLoggedInException
@@ -9,11 +10,12 @@ import java.net.SocketTimeoutException
 import java.net.UnknownHostException
 import javax.inject.Inject
 
-open class ErrorHandler @Inject constructor(protected val resources: Resources) {
+open class ErrorHandler @Inject constructor(protected val resources: Resources, private val chuckCollector: ChuckCollector) {
 
     var showErrorMessage: (String, Throwable) -> Unit = { _, _ -> }
 
     fun dispatch(error: Throwable) {
+        chuckCollector.onError(error.javaClass.simpleName, error)
         Timber.e(error, "An exception occurred while the Wulkanowy was running")
         proceed(error)
     }
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
index 89654732a..f8ea6e3db 100644
--- 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
@@ -1,11 +1,12 @@
 package io.github.wulkanowy.ui.base.session
 
 import android.content.res.Resources
+import com.readystatesoftware.chuck.api.ChuckCollector
 import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.security.ScramblerException
 import javax.inject.Inject
 
-class SessionErrorHandler @Inject constructor(resources: Resources) : ErrorHandler(resources) {
+class SessionErrorHandler @Inject constructor(resources: Resources, chuckCollector: ChuckCollector) : ErrorHandler(resources, chuckCollector) {
 
     var onDecryptionFail: () -> Unit = {}
 
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 40f1d711c..18c3a422a 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
@@ -2,12 +2,13 @@ package io.github.wulkanowy.ui.modules.login
 
 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.ui.base.ErrorHandler
 import javax.inject.Inject
 
-class LoginErrorHandler @Inject constructor(resources: Resources) : ErrorHandler(resources) {
+class LoginErrorHandler @Inject constructor(resources: Resources, chuckCollector: ChuckCollector) : ErrorHandler(resources, chuckCollector) {
 
     var onBadCredentials: () -> Unit = {}
 
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 7273e8e9a..57fcea099 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
@@ -6,6 +6,7 @@ import android.os.Bundle
 import androidx.appcompat.app.AppCompatDelegate
 import com.takisoft.preferencex.PreferenceFragmentCompat
 import dagger.android.support.AndroidSupportInjection
+import io.github.wulkanowy.BuildConfig
 import io.github.wulkanowy.R
 import io.github.wulkanowy.ui.base.BaseActivity
 import io.github.wulkanowy.ui.modules.main.MainView
@@ -36,6 +37,7 @@ class SettingsFragment : PreferenceFragmentCompat(), SharedPreferences.OnSharedP
 
     override fun onCreatePreferencesFix(savedInstanceState: Bundle?, rootKey: String?) {
         addPreferencesFromResource(R.xml.scheme_preferences)
+        findPreference(getString(R.string.pref_key_debug_chucker_notification)).isVisible = BuildConfig.DEBUG
     }
 
     override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences, key: String) {
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 403689138..6a2087558 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
@@ -1,5 +1,7 @@
 package io.github.wulkanowy.ui.modules.settings
 
+import com.readystatesoftware.chuck.api.ChuckCollector
+import io.github.wulkanowy.data.RepositoryModule_ProvideChuckCollectorFactory
 import io.github.wulkanowy.data.repositories.PreferencesRepository
 import io.github.wulkanowy.services.job.ServiceHelper
 import io.github.wulkanowy.ui.base.BasePresenter
@@ -13,7 +15,8 @@ class SettingsPresenter @Inject constructor(
     errorHandler: ErrorHandler,
     private val preferencesRepository: PreferencesRepository,
     private val serviceHelper: ServiceHelper,
-    private val analytics: FirebaseAnalyticsHelper
+    private val analytics: FirebaseAnalyticsHelper,
+    private val chuckCollector: ChuckCollector
 ) : BasePresenter<SettingsView>(errorHandler) {
 
     override fun onAttachView(view: SettingsView) {
@@ -37,6 +40,9 @@ class SettingsPresenter @Inject constructor(
             preferencesRepository.currentThemeKey -> {
                 view?.setTheme(preferencesRepository.currentTheme)
             }
+            preferencesRepository.isShowChuckerNotificationKey -> {
+                chuckCollector.showNotification(preferencesRepository.isShowChuckerNotification)
+            }
         }
 
         analytics.logEvent("setting_changed", mapOf("name" to key))
diff --git a/app/src/main/res/values-pl/strings.xml b/app/src/main/res/values-pl/strings.xml
index f2e48b4da..3c4a4ebba 100644
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@@ -227,6 +227,7 @@
 
     <string name="pref_notify_header">Powiadomienia</string>
     <string name="pref_notify_switch">Pokazuj powiadomienia</string>
+    <string name="pref_debug_notify_switch">Pokazuj powiadomienia debugowania</string>
 
     <string name="pref_services_header">Synchronizacja</string>
     <string name="pref_services_switch">Automatyczna aktualizacja</string>
diff --git a/app/src/main/res/values/preferences_keys.xml b/app/src/main/res/values/preferences_keys.xml
index ea2585e79..54cc2bbde 100644
--- a/app/src/main/res/values/preferences_keys.xml
+++ b/app/src/main/res/values/preferences_keys.xml
@@ -10,4 +10,5 @@
     <string name="pref_key_services_interval">services_interval</string>
     <string name="pref_key_services_wifi_only">services_disable_wifi_only</string>
     <string name="pref_key_notifications_enable">notifications_enable</string>
+    <string name="pref_key_debug_chucker_notification">chucker_notification</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index a4cb76952..f6140ad04 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -210,6 +210,7 @@
 
     <string name="pref_notify_header">Notifications</string>
     <string name="pref_notify_switch">Show notifications</string>
+    <string name="pref_debug_notify_switch">Show debug notifications</string>
 
     <string name="pref_services_header">Synchronization</string>
     <string name="pref_services_switch">Automatic update</string>
diff --git a/app/src/main/res/xml/scheme_preferences.xml b/app/src/main/res/xml/scheme_preferences.xml
index 1ba8885a6..575fea63d 100644
--- a/app/src/main/res/xml/scheme_preferences.xml
+++ b/app/src/main/res/xml/scheme_preferences.xml
@@ -80,5 +80,10 @@
             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_debug_chucker_notification"
+            android:title="@string/pref_debug_notify_switch"
+            app:iconSpaceReserved="false" />
     </PreferenceCategory>
 </PreferenceScreen>