diff --git a/app/build.gradle b/app/build.gradle
index a316797..946a344 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -29,7 +29,6 @@ android {
 dependencies {
     implementation 'com.android.support:recyclerview-v7:27.1.1'
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    implementation 'com.google.firebase:firebase-crash:11.8.0'
     androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
@@ -51,7 +50,4 @@ dependencies {
     // https://github.com/bignerdranch/expandable-recycler-view
     implementation 'com.bignerdranch.android:expandablerecyclerview:3.0.0-RC1'
     implementation files('libs/jericho-html-3.4.jar')
-    implementation 'com.google.firebase:firebase-core:16.0.1'
 }
-
-apply plugin: 'com.google.gms.google-services'
diff --git a/app/google-services.json b/app/google-services.json
deleted file mode 100644
index 329a07d..0000000
--- a/app/google-services.json
+++ /dev/null
@@ -1,55 +0,0 @@
-{
-  "project_info": {
-    "project_number": "847234418434",
-    "firebase_url": "https://fu-berlin-planner.firebaseio.com",
-    "project_id": "fu-berlin-planner",
-    "storage_bucket": "fu-berlin-planner.appspot.com"
-  },
-  "client": [
-    {
-      "client_info": {
-        "mobilesdk_app_id": "1:847234418434:android:83c6c85cc1bc6041",
-        "android_client_info": {
-          "package_name": "de.sebse.fuplanner"
-        }
-      },
-      "oauth_client": [
-        {
-          "client_id": "847234418434-2qr5e253rmtr9bvln5nn248lobmv95gd.apps.googleusercontent.com",
-          "client_type": 1,
-          "android_info": {
-            "package_name": "de.sebse.fuplanner",
-            "certificate_hash": "8dcea40178f1803c26007711ebe3b1161daa35a3"
-          }
-        },
-        {
-          "client_id": "847234418434-4rbd4t7lghr6ctdskep62jd5b4ed5fmu.apps.googleusercontent.com",
-          "client_type": 3
-        }
-      ],
-      "api_key": [
-        {
-          "current_key": "AIzaSyAE1qDv8AnvGSqIQxh0mT3_f1Qu2cEu3a4"
-        }
-      ],
-      "services": {
-        "analytics_service": {
-          "status": 1
-        },
-        "appinvite_service": {
-          "status": 2,
-          "other_platform_oauth_client": [
-            {
-              "client_id": "847234418434-4rbd4t7lghr6ctdskep62jd5b4ed5fmu.apps.googleusercontent.com",
-              "client_type": 3
-            }
-          ]
-        },
-        "ads_service": {
-          "status": 2
-        }
-      }
-    }
-  ],
-  "configuration_version": "1"
-}
\ No newline at end of file
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
deleted file mode 100644
index c19b65b..0000000
--- a/app/proguard-rules.pro
+++ /dev/null
@@ -1,25 +0,0 @@
-# Add project specific ProGuard rules here.
-# By default, the flags in this file are appended to flags specified
-# in /home/sebastian/Android/Sdk/tools/proguard/proguard-android.txt
-# You can edit the include path and order by changing the proguardFiles
-# directive in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# Add any project specific keep options here:
-
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
-
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile