diff --git a/filcnaplo/assets/fonts/SpaceMono/SpaceMono-Bold.ttf b/filcnaplo/assets/fonts/SpaceMono/SpaceMono-Bold.ttf
new file mode 100644
index 0000000..18b8aea
Binary files /dev/null and b/filcnaplo/assets/fonts/SpaceMono/SpaceMono-Bold.ttf differ
diff --git a/filcnaplo/assets/fonts/SpaceMono/SpaceMono-BoldItalic.ttf b/filcnaplo/assets/fonts/SpaceMono/SpaceMono-BoldItalic.ttf
new file mode 100644
index 0000000..51fcc39
Binary files /dev/null and b/filcnaplo/assets/fonts/SpaceMono/SpaceMono-BoldItalic.ttf differ
diff --git a/filcnaplo/assets/fonts/SpaceMono/SpaceMono-Italic.ttf b/filcnaplo/assets/fonts/SpaceMono/SpaceMono-Italic.ttf
new file mode 100644
index 0000000..119c545
Binary files /dev/null and b/filcnaplo/assets/fonts/SpaceMono/SpaceMono-Italic.ttf differ
diff --git a/filcnaplo/assets/fonts/SpaceMono/SpaceMono-Regular.ttf b/filcnaplo/assets/fonts/SpaceMono/SpaceMono-Regular.ttf
new file mode 100644
index 0000000..3374aca
Binary files /dev/null and b/filcnaplo/assets/fonts/SpaceMono/SpaceMono-Regular.ttf differ
diff --git a/filcnaplo/lib/api/client.dart b/filcnaplo/lib/api/client.dart
index 8005fd0..460c4ba 100644
--- a/filcnaplo/lib/api/client.dart
+++ b/filcnaplo/lib/api/client.dart
@@ -3,15 +3,23 @@ import 'dart:convert';
 import 'package:filcnaplo/models/config.dart';
 import 'package:filcnaplo/models/news.dart';
 import 'package:filcnaplo/models/release.dart';
+import 'package:filcnaplo/models/settings.dart';
 import 'package:filcnaplo/models/supporter.dart';
 import 'package:filcnaplo_kreta_api/models/school.dart';
+import 'package:flutter/cupertino.dart';
 import 'package:http/http.dart' as http;
 
 class FilcAPI {
+  // Public API
   static const SCHOOL_LIST = "https://filcnaplo.hu/v2/school_list.json";
-  static const CONFIG = "https://filcnaplo.hu/v2/config.json";
   static const NEWS = "https://filcnaplo.hu/v2/news.json";
   static const SUPPORTERS = "https://filcnaplo.hu/v2/supporters.json";
+
+  // Private API
+  static const CONFIG = "https://api.filcnaplo.hu/config";
+  static const REPORT = "https://api.filcnaplo.hu/report";
+
+  // Updates
   static const REPO = "filc/naplo";
   static const RELEASES = "https://api.github.com/repos/$REPO/releases";
 
@@ -35,15 +43,22 @@ class FilcAPI {
     }
   }
 
-  static Future<Config?> getConfig() async {
+  static Future<Config?> getConfig(SettingsProvider settings) async {
+    Map<String, String> headers = {
+      "x-filc-id": settings.xFilcId,
+      "user-agent": settings.config.userAgent,
+    };
+
     try {
-      http.Response res = await http.get(Uri.parse(CONFIG));
+      http.Response res = await http.get(Uri.parse(CONFIG), headers: headers);
 
       if (res.statusCode == 200) {
         return Config.fromJson(jsonDecode(res.body));
-      } else {
-        throw "HTTP ${res.statusCode}: ${res.body}";
+      } else if (res.statusCode == 429) {
+        res = await http.get(Uri.parse(CONFIG));
+        if (res.statusCode == 200) return Config.fromJson(jsonDecode(res.body));
       }
+      throw "HTTP ${res.statusCode}: ${res.body}";
     } catch (error) {
       print("ERROR: FilcAPI.getConfig: $error");
     }
@@ -104,4 +119,35 @@ class FilcAPI {
 
     return Future.value(null);
   }
+
+  static Future<void> sendReport(ErrorReport report) async {
+    try {
+      http.Response res = await http.post(Uri.parse(REPORT), body: {
+        "os": report.os,
+        "version": report.version,
+        "error": report.error,
+        "stack_trace": report.stack,
+      });
+
+      if (res.statusCode != 200) {
+        throw "HTTP ${res.statusCode}: ${res.body}";
+      }
+    } catch (error) {
+      print("ERROR: FilcAPI.sendReport: $error");
+    }
+  }
+}
+
+class ErrorReport {
+  String stack;
+  String os;
+  String version;
+  String error;
+
+  ErrorReport({
+    required this.stack,
+    required this.os,
+    required this.version,
+    required this.error,
+  });
 }
diff --git a/filcnaplo/lib/app.dart b/filcnaplo/lib/app.dart
index 9fe579e..de1e499 100644
--- a/filcnaplo/lib/app.dart
+++ b/filcnaplo/lib/app.dart
@@ -46,7 +46,7 @@ class App extends StatelessWidget {
     setSystemChrome(context);
 
     WidgetsBinding.instance?.addPostFrameCallback((_) {
-      FilcAPI.getConfig().then((Config? config) {
+      FilcAPI.getConfig(settings).then((Config? config) {
         settings.update(context, database: database, config: config ?? Config.fromJson({}));
       });
     });
diff --git a/filcnaplo/lib/database/init.dart b/filcnaplo/lib/database/init.dart
index 3590cf1..49dfb0e 100644
--- a/filcnaplo/lib/database/init.dart
+++ b/filcnaplo/lib/database/init.dart
@@ -32,6 +32,7 @@ Future<DatabaseStruct> createSettingsTable(Database db) async {
     "grade_color1": int, "grade_color2": int, "grade_color3": int, "grade_color4": int, "grade_color5": int, // grade colors
     "vibration_strength": int, "ab_weeks": int, "swap_ab_weeks": int,
     "notifications": int, "notifications_bitfield": int, "notification_poll_interval": int, // notifications
+    "x_filc_id": String,
   });
 
   // Create table Settings
@@ -42,7 +43,7 @@ Future<DatabaseStruct> createSettingsTable(Database db) async {
 
 Future<DatabaseStruct> createUsersTable(Database db) async {
   var usersDB = DatabaseStruct(
-      {"id": String, "name": String, "username": String, "password": String, "institute_code": String, "student": String, "role": String});
+      {"id": String, "name": String, "username": String, "password": String, "institute_code": String, "student": String, "role": int});
 
   // Create table Users
   await db.execute("CREATE TABLE IF NOT EXISTS users ($usersDB)");
diff --git a/filcnaplo/lib/main.dart b/filcnaplo/lib/main.dart
index ef24d6a..61830b7 100644
--- a/filcnaplo/lib/main.dart
+++ b/filcnaplo/lib/main.dart
@@ -2,10 +2,12 @@ import 'package:filcnaplo/api/providers/user_provider.dart';
 import 'package:filcnaplo/api/providers/database_provider.dart';
 import 'package:filcnaplo/database/init.dart';
 import 'package:filcnaplo/models/settings.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:filcnaplo/app.dart';
 import 'package:flutter/services.dart';
 import 'package:filcnaplo_mobile_ui/screens/error_screen.dart';
+import 'package:filcnaplo_mobile_ui/screens/error_report_screen.dart';
 
 void main() async {
   // Initalize
@@ -39,12 +41,24 @@ class Startup {
   }
 }
 
+bool errorShown = false;
+String lastException = '';
+
 Widget errorBuilder(FlutterErrorDetails details) {
   return Builder(builder: (context) {
     if (Navigator.of(context).canPop()) Navigator.pop(context);
 
     WidgetsBinding.instance?.addPostFrameCallback((_) {
-      Navigator.of(context, rootNavigator: true).push(MaterialPageRoute(builder: (ctx) => ErrorScreen(details)));
+      if (!errorShown && details.exceptionAsString() != lastException) {
+        errorShown = true;
+        lastException = details.exceptionAsString();
+        Navigator.of(context, rootNavigator: true).push(MaterialPageRoute(builder: (context) {
+          if (kReleaseMode)
+            return ErrorReportScreen(details);
+          else
+            return ErrorScreen(details);
+        })).then((_) => errorShown = false);
+      }
     });
 
     return Container();
diff --git a/filcnaplo/lib/models/settings.dart b/filcnaplo/lib/models/settings.dart
index 98918c5..cd6f0a5 100644
--- a/filcnaplo/lib/models/settings.dart
+++ b/filcnaplo/lib/models/settings.dart
@@ -6,6 +6,7 @@ import 'package:filcnaplo/theme.dart';
 import 'package:flutter/material.dart';
 import 'package:package_info_plus/package_info_plus.dart';
 import 'package:provider/provider.dart';
+import 'package:uuid/uuid.dart';
 
 enum Pages { home, grades, timetable, messages, absences }
 enum UpdateChannel { stable, beta, dev }
@@ -47,6 +48,7 @@ class SettingsProvider extends ChangeNotifier {
   bool _swapABweeks;
   UpdateChannel _updateChannel;
   Config _config;
+  String _xFilcId;
 
   SettingsProvider({
     required String language,
@@ -66,6 +68,7 @@ class SettingsProvider extends ChangeNotifier {
     required bool swapABweeks,
     required UpdateChannel updateChannel,
     required Config config,
+    required String xFilcId,
   })  : _language = language,
         _startPage = startPage,
         _rounding = rounding,
@@ -82,7 +85,8 @@ class SettingsProvider extends ChangeNotifier {
         _ABweeks = ABweeks,
         _swapABweeks = swapABweeks,
         _updateChannel = updateChannel,
-        _config = config {
+        _config = config,
+        _xFilcId = xFilcId {
     PackageInfo.fromPlatform().then((PackageInfo packageInfo) {
       _packageInfo = packageInfo;
     });
@@ -113,6 +117,7 @@ class SettingsProvider extends ChangeNotifier {
       swapABweeks: map["swap_ab_weeks"] == 1 ? true : false,
       updateChannel: UpdateChannel.values[map["update_channel"]],
       config: Config.fromJson(jsonDecode(map["config"] ?? "{}")),
+      xFilcId: map["x_filc_id"],
     );
   }
 
@@ -139,6 +144,7 @@ class SettingsProvider extends ChangeNotifier {
       "swap_ab_weeks": _swapABweeks ? 1 : 0,
       "notification_poll_interval": _notificationPollInterval,
       "config": jsonEncode(config.json),
+      "x_filc_id": _xFilcId,
     };
   }
 
@@ -167,6 +173,7 @@ class SettingsProvider extends ChangeNotifier {
       swapABweeks: false,
       updateChannel: UpdateChannel.stable,
       config: Config.fromJson({}),
+      xFilcId: Uuid().v4(),
     );
   }
 
@@ -189,6 +196,7 @@ class SettingsProvider extends ChangeNotifier {
   UpdateChannel get updateChannel => _updateChannel;
   PackageInfo? get packageInfo => _packageInfo;
   Config get config => _config;
+  String get xFilcId => _xFilcId;
 
   Future<void> update(
     BuildContext context, {
@@ -210,6 +218,7 @@ class SettingsProvider extends ChangeNotifier {
     bool? swapABweeks,
     UpdateChannel? updateChannel,
     Config? config,
+    String? xFilcId,
   }) async {
     if (language != null && language != _language) _language = language;
     if (startPage != null && startPage != _startPage) _startPage = startPage;
@@ -229,6 +238,7 @@ class SettingsProvider extends ChangeNotifier {
     if (swapABweeks != null && swapABweeks != _swapABweeks) _swapABweeks = swapABweeks;
     if (updateChannel != null && updateChannel != _updateChannel) _updateChannel = updateChannel;
     if (config != null && config != _config) _config = config;
+    if (xFilcId != null && xFilcId != _xFilcId) _xFilcId = xFilcId;
 
     if (database == null) database = Provider.of<DatabaseProvider>(context, listen: false);
     await database.store.storeSettings(this);
diff --git a/filcnaplo/pubspec.yaml b/filcnaplo/pubspec.yaml
index 82ae9a4..bf0eac0 100644
--- a/filcnaplo/pubspec.yaml
+++ b/filcnaplo/pubspec.yaml
@@ -101,6 +101,17 @@ flutter:
           weight: 100
           style: italic
 
+    - family: SpaceMono
+      fonts:
+        - asset: assets/fonts/SpaceMono/SpaceMono-Regular.ttf
+        - asset: assets/fonts/SpaceMono/SpaceMono-Bold.ttf
+          weight: 700
+        - asset: assets/fonts/SpaceMono/SpaceMono-Italic.ttf
+          style: italic
+        - asset: assets/fonts/SpaceMono/SpaceMono-BoldItalic.ttf
+          weight: 700
+          style: italic
+
 flutter_icons:
   image_path: "assets/icons/ic_launcher.png"
   adaptive_icon_background: "#1F5B50"
diff --git a/filcnaplo_mobile_ui b/filcnaplo_mobile_ui
index 29313fe..33bfa51 160000
--- a/filcnaplo_mobile_ui
+++ b/filcnaplo_mobile_ui
@@ -1 +1 @@
-Subproject commit 29313fe1ee789f824eee394cf96263e02798f4bd
+Subproject commit 33bfa51329b52f900835b06adc8f62b9cb16b8eb