diff --git a/CHANGELOG.md b/CHANGELOG.md
index c162cf22..54471d28 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 1.2.3 (Narcg 2, 2021)
+
+* Add a backend on default
+* Fix different app bars
+* Fix servers offline issues
+* Add changelog to settings
+
 ## 1.2.2 (February 24, 2021)
 
 * Fix responsive rebuild issues
diff --git a/README.md b/README.md
index e5008dc2..9cfbf2cc 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,10 @@
 
 > A free, opensource, serverless learning platform. A linwood project.
 
+![Play store badge](https://img.shields.io/endpoint?color=green&style=for-the-badge&url=https%3A%2F%2Fplayshields.herokuapp.com%2Fplay%3Fi%3Dcom.github.linwoodcloud.dev_doctor%26l%3DPlay%2520Store%26m%3D%24version)
+[![GitHub License badge](https://img.shields.io/github/license/LinwoodCloud/dev_doctor?style=for-the-badge)](https://github.com/LinwoodCloud/dev_doctor/blob/main/LICENSE)
+[![Discord badge](https://img.shields.io/discord/735424757142519848?style=for-the-badge)](https://discord.linwood.tk)
+
 ## Introduction
 
 ### Learn everything
@@ -26,6 +30,8 @@ Click [here](https://dev-doctor.cf) and try it. You have nothing to lose!
 #### Stores
 
 * Play Store: <https://play.google.com/store/apps/details?id=com.github.linwoodcloud.dev_doctor>
+* SkyDroid: <https://to.skydroid.app/com.github.linwoodcloud.dev_doctor.izzyondroid>
+* FDroid: <https://www.f-droid.org/en/packages/com.github.linwoodcloud.dev_doctor/>
 
 ### iOS
 
diff --git a/android/app/build.gradle b/android/app/build.gradle
index 2ffe8278..2b76745b 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -42,6 +42,7 @@ android {
         targetSdkVersion 30
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
+        multiDexEnabled true
     }
     signingConfigs {
         release {
@@ -68,6 +69,8 @@ flutter {
 }
 
 dependencies {
+    def multidex_version = "2.0.1"
+    implementation "androidx.multidex:multidex:$multidex_version"
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'com.google.android.material:material:1.3.0'
 }
diff --git a/android/build.gradle b/android/build.gradle
index c505a863..2536f19c 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -6,7 +6,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.0'
+        classpath 'com.android.tools.build:gradle:4.1.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
diff --git a/android/gradle/wrapper/gradle-wrapper.properties b/android/gradle/wrapper/gradle-wrapper.properties
index bc6a58af..442d9132 100644
--- a/android/gradle/wrapper/gradle-wrapper.properties
+++ b/android/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,5 @@
-#Fri Jun 23 08:50:38 CEST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip
diff --git a/fastlane/metadata/android/en-US/changelogs/7.txt b/fastlane/metadata/android/en-US/changelogs/7.txt
new file mode 100644
index 00000000..e5ea2fb1
--- /dev/null
+++ b/fastlane/metadata/android/en-US/changelogs/7.txt
@@ -0,0 +1,4 @@
+Add a backend on default
+Fix different app bars
+Fix servers offline issues
+Add changelog to settings
\ No newline at end of file
diff --git a/lib/backends/home.dart b/lib/backends/home.dart
index 396831c6..11a64465 100644
--- a/lib/backends/home.dart
+++ b/lib/backends/home.dart
@@ -2,6 +2,7 @@ import 'dart:math';
 
 import 'package:dev_doctor/models/collection.dart';
 import 'package:dev_doctor/models/server.dart';
+import 'package:dev_doctor/widgets/appbar.dart';
 import 'package:dev_doctor/widgets/image.dart';
 import 'package:flutter/material.dart';
 import 'package:easy_localization/easy_localization.dart';
@@ -173,7 +174,7 @@ class _BackendsPageState extends State<BackendsPage> with TickerProviderStateMix
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-        appBar: AppBar(title: Text("backends.title").tr(), actions: [
+        appBar: MyAppBar(title: "backends.title".tr(), actions: [
           IconButton(
               icon: Icon(Icons.search),
               onPressed: () {
diff --git a/lib/backends/user.dart b/lib/backends/user.dart
index 9846b01b..27b1d734 100644
--- a/lib/backends/user.dart
+++ b/lib/backends/user.dart
@@ -1,5 +1,6 @@
 import 'package:dev_doctor/models/collection.dart';
 import 'package:dev_doctor/models/server.dart';
+import 'package:dev_doctor/widgets/appbar.dart';
 import 'package:dev_doctor/widgets/image.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_modular/flutter_modular.dart';
@@ -36,10 +37,8 @@ class BackendUserPage extends StatelessWidget {
 
   Widget _buildView(BackendUser backendUser) {
     var entries = backendUser.buildEntries();
-    print(entries[0]);
-    print(entries.length);
     return Scaffold(
-        appBar: AppBar(title: Text(backendUser.name)),
+        appBar: MyAppBar(title: backendUser.name),
         body: Scrollbar(
             child: SingleChildScrollView(
                 child: Wrap(
diff --git a/lib/courses/home.dart b/lib/courses/home.dart
index be302970..3eaf45a3 100644
--- a/lib/courses/home.dart
+++ b/lib/courses/home.dart
@@ -2,6 +2,7 @@ import 'dart:math';
 
 import 'package:dev_doctor/models/course.dart';
 import 'package:dev_doctor/models/server.dart';
+import 'package:dev_doctor/widgets/appbar.dart';
 import 'package:dev_doctor/widgets/image.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_modular/flutter_modular.dart';
@@ -115,7 +116,7 @@ class _CoursesPageState extends State<CoursesPage> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-        appBar: AppBar(title: Text("courses.title").tr(), actions: [
+        appBar: MyAppBar(title: "courses.title".tr(), actions: [
           IconButton(
               icon: Icon(Icons.search_outlined),
               onPressed: () {
diff --git a/lib/courses/part/layout.dart b/lib/courses/part/layout.dart
index ce3e4903..063b044d 100644
--- a/lib/courses/part/layout.dart
+++ b/lib/courses/part/layout.dart
@@ -3,6 +3,7 @@ import 'package:dev_doctor/models/items/quiz.dart';
 import 'package:dev_doctor/models/items/text.dart';
 import 'package:dev_doctor/models/items/video.dart';
 import 'package:dev_doctor/models/part.dart';
+import 'package:dev_doctor/widgets/appbar.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_modular/flutter_modular.dart';
 
@@ -55,8 +56,8 @@ class _PartItemLayoutState extends State<PartItemLayout> {
                       bloc?.fetch(serverId: serverId, courseId: courseId, partId: index);
                     },
                   ),
-                  appBar: AppBar(
-                    title: Text(snapshot.data.name),
+                  appBar: MyAppBar(
+                    title: snapshot.data.name,
                     bottom: TabBar(
                         isScrollable: true,
                         onTap: (index) => Modular.to.pushReplacementNamed(
diff --git a/lib/loader.dart b/lib/loader.dart
index ed90b6fc..48bfd4e7 100644
--- a/lib/loader.dart
+++ b/lib/loader.dart
@@ -6,11 +6,11 @@ import 'yaml.dart';
 
 Future<Map<String, dynamic>> loadFile(String path, {String type}) async {
   try {
-    var result = await loadJsonFile(path);
+    var result = await loadJsonFile(path) ?? {};
     if (type == null) result['type'] = 'json';
     return result;
   } catch (e) {
-    var result = await loadYamlFile(path);
+    var result = await loadYamlFile(path) ?? {};
     if (type == null) result['type'] = 'yml';
     return result;
   }
@@ -22,6 +22,12 @@ Future<Map<String, dynamic>> loadJsonFile(String path) async {
 }
 
 Future<Map<String, dynamic>> loadYamlFile(String path) async {
-  var response = await http.get(Uri.parse(path + ".yml"));
-  return yamlMapToJson(loadYaml(utf8.decode(response.bodyBytes)));
+  try {
+    var response = await http.get(Uri.parse(path + ".yml"));
+    return yamlMapToJson(loadYaml(utf8.decode(response.bodyBytes)));
+  } catch (e) {
+    print(e);
+  }
+
+  return null;
 }
diff --git a/lib/main.dart b/lib/main.dart
index 02ee9971..044632c5 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -11,9 +11,9 @@ void main() async {
   await Hive.initFlutter();
   await Hive.openBox('settings');
   await Hive.openBox('appearance');
-  /*var _serversBox = */ await Hive.openBox<String>('servers');
+  var _serversBox = await Hive.openBox<String>('servers');
   var _collectionsBox = await Hive.openBox<String>('collections');
   if (_collectionsBox.isEmpty) await _collectionsBox.add('https://collection.dev-doctor.cf');
-  // if (_serversBox.isEmpty) await _serversBox.add('https://backend.dev-doctor.cf');
+  if (_serversBox.isEmpty) await _serversBox.add('https://backend.dev-doctor.cf');
   runApp(ModularApp(module: AppModule(), child: AppWidget()));
 }
diff --git a/lib/models/collection.dart b/lib/models/collection.dart
index 3dfe28d1..a83599f2 100644
--- a/lib/models/collection.dart
+++ b/lib/models/collection.dart
@@ -29,7 +29,7 @@ class BackendCollection {
         var current = _box.values.toList().indexOf(url);
         if (current != -1) index = _box.keyAt(current);
       } else if (url == null) url = _box.get(index);
-      data = await loadFile("$url/config");
+      data = await loadFile("$url/config") ?? {};
     } catch (e) {
       print(e);
     }
diff --git a/lib/models/server.dart b/lib/models/server.dart
index 7532a65b..11b7ebb6 100644
--- a/lib/models/server.dart
+++ b/lib/models/server.dart
@@ -68,16 +68,17 @@ class CoursesServer {
   Future<CoursesServer> toggle() => added ? remove() : add();
 
   static Future<CoursesServer> fetch({String url, int index, BackendEntry entry}) async {
-    var data = Map<String, dynamic>();
+    var data = <String, dynamic>{};
     try {
       if (index == null) {
         var current = _box.values.toList().indexOf(url);
         if (current != -1) index = _box.keyAt(current);
       } else if (url == null) url = Hive.box<String>('servers').get(index);
-      data = await loadFile("$url/config");
+      data = await loadFile("$url/config") ?? {};
     } catch (e) {
       print(e);
     }
+    data['courses'] = data['courses'] ?? [];
     data['entry'] = entry;
     data['url'] = url;
     data['index'] = index;
diff --git a/lib/settings/home.dart b/lib/settings/home.dart
index 2c492c82..829115eb 100644
--- a/lib/settings/home.dart
+++ b/lib/settings/home.dart
@@ -85,6 +85,11 @@ class SettingsList extends StatelessWidget {
               leading: Icon(Icons.code_outlined),
               title: Text("settings.code").tr(),
               onTap: () => launch("https://github.com/LinwoodCloud/dev-doctor")),
+          ListTile(
+              leading: Icon(Icons.history_outlined),
+              title: Text("settings.changelog").tr(),
+              onTap: () =>
+                  launch("https://github.com/LinwoodCloud/dev_doctor/blob/main/CHANGELOG.md")),
           ListTile(
               leading: Icon(Icons.privacy_tip_outlined),
               title: Text("settings.privacypolicy").tr(),
diff --git a/lib/settings/servers.dart b/lib/settings/servers.dart
index 02fb478c..d197c227 100644
--- a/lib/settings/servers.dart
+++ b/lib/settings/servers.dart
@@ -20,6 +20,16 @@ class _ServersSettingsPageState extends State<ServersSettingsPage> {
     super.initState();
   }
 
+  Future<List<CoursesServer>> _buildFuture() async {
+    var urls = _serversBox.values.toList().asMap();
+    var servers = <CoursesServer>[];
+    for (var key in urls.keys) {
+      var value = urls[key];
+      servers.add(await CoursesServer.fetch(url: value, index: key));
+    }
+    return servers;
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -27,19 +37,15 @@ class _ServersSettingsPageState extends State<ServersSettingsPage> {
       body: SettingsLayout(
           child: ValueListenableBuilder(
               valueListenable: _serversBox.listenable(),
-              builder: (context, Box<String> box, _) => FutureBuilder(
-                  future: Future.wait(_serversBox.values
-                      .toList()
-                      .asMap()
-                      .map((index, e) => MapEntry(index, CoursesServer.fetch(url: e, index: index)))
-                      .values),
+              builder: (context, Box<String> box, _) => FutureBuilder<List<CoursesServer>>(
+                  future: _buildFuture(),
                   builder: (context, snapshot) {
                     switch (snapshot.connectionState) {
                       case ConnectionState.waiting:
                         return Center(child: CircularProgressIndicator());
                       default:
                         if (snapshot.hasError) return Text('Error: ${snapshot.error}');
-                        var data = snapshot.data as List<CoursesServer>;
+                        var data = snapshot.data;
                         return Scrollbar(
                             child: ListView.builder(
                                 itemCount: box.length,
diff --git a/lib/widgets/appbar.dart b/lib/widgets/appbar.dart
index c448c0f2..d16f5d87 100644
--- a/lib/widgets/appbar.dart
+++ b/lib/widgets/appbar.dart
@@ -6,7 +6,9 @@ class MyAppBar extends StatelessWidget with PreferredSizeWidget {
   final Size preferredSize;
   final List<Widget> actions;
 
-  MyAppBar({this.title, this.actions, Key key})
+  final PreferredSizeWidget bottom;
+
+  MyAppBar({this.title, this.actions, Key key, this.bottom})
       : preferredSize = Size.fromHeight(50.0),
         super(key: key);
 
@@ -15,6 +17,7 @@ class MyAppBar extends StatelessWidget with PreferredSizeWidget {
     return AppBar(
       elevation: 5.0,
       title: Text(title),
+      bottom: bottom,
       actions: actions,
       //actions: [IconButton(icon: Icon(Icons.settings_outlined), onPressed: () {})],
       automaticallyImplyLeading: true,
diff --git a/pubspec.lock b/pubspec.lock
index e6bd083c..c8b4b281 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -162,13 +162,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.5"
-  cupertino_icons:
-    dependency: "direct main"
-    description:
-      name: cupertino_icons
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.2"
   dart_style:
     dependency: transitive
     description:
@@ -288,7 +281,7 @@ packages:
       name: flutter_svg
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.20.0-nullsafety.3"
+    version: "0.21.0-nullsafety.0"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -378,7 +371,7 @@ packages:
       name: io
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.4"
+    version: "0.3.5"
   js:
     dependency: transitive
     description:
@@ -553,7 +546,7 @@ packages:
       name: rxdart
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.26.0-nullsafety.1"
+    version: "0.26.0"
   shared_preferences:
     dependency: transitive
     description:
@@ -712,7 +705,7 @@ packages:
       name: url_launcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.0.0"
+    version: "6.0.1"
   url_launcher_linux:
     dependency: transitive
     description:
@@ -817,7 +810,7 @@ packages:
       name: yaml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "3.1.0"
 sdks:
   dart: ">=2.12.0-259.9.beta <3.0.0"
   flutter: ">=1.24.0-7.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 4e9a2204..f79a1c80 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -15,7 +15,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
 # Read more about iOS versioning at
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
-version: '1.2.2+6'
+version: '1.2.3+7'
 
 environment:
   sdk: ">=2.7.0 <3.0.0"
@@ -27,13 +27,13 @@ dependencies:
   enum_to_string: ^2.0.0-nullsafety.1
   http: ^0.13.0
   hive: ^1.4.4+1
-  rxdart: ^0.26.0-nullsafety.1
+  rxdart: ^0.26.0
   hive_flutter: ^0.3.1
   flutter_modular: ^3.0.0-nullsafety.45
   url_launcher: ^6.0.0-nullsafety.7
   flutter_markdown: ^0.5.2
   #universal_html: ^1.2.4
-  flutter_svg: ^0.20.0-nullsafety.3
+  flutter_svg: ^0.21.0-nullsafety.0
   flutter_inappwebview: ^4.0.0+4
   xml: ^5.0.0-nullsafety.1
   flutter_localized_locales: ^2.0.1
@@ -41,8 +41,8 @@ dependencies:
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^1.0.2
-  yaml: ^3.0.0
+  # cupertino_icons: ^1.0.2
+  yaml: ^3.1.0
 flutter_icons:
   android: true
   ios: true
diff --git a/translations/de.json b/translations/de.json
index 474ce698..97b603b0 100644
--- a/translations/de.json
+++ b/translations/de.json
@@ -55,6 +55,7 @@
         "information": "Informationen",
         "title": "Einstellungen",
         "privacypolicy": "Datenschutzerklärung",
+        "changelog":"Änderungsliste",
         "home": {
             "title": "Start",
             "username": "Benutzername"
diff --git a/translations/en.json b/translations/en.json
index 0ba99f38..dbe427a6 100644
--- a/translations/en.json
+++ b/translations/en.json
@@ -55,6 +55,7 @@
         "information": "Information",
         "title": "Settings",
         "privacypolicy": "Privacy Policy",
+        "changelog":"Changelog",
         "home": {
             "title": "Home",
             "username": "Username"