diff --git a/Source Code Mobile/auth_service.dart b/Source Code Mobile/auth_service.dart
new file mode 100644
index 0000000..1104983
--- /dev/null
+++ b/Source Code Mobile/auth_service.dart	
@@ -0,0 +1,70 @@
+import 'package:firebase_auth/firebase_auth.dart';
+import 'package:firebase_database/firebase_database.dart';
+
+class AuthService {
+  final FirebaseAuth _auth = FirebaseAuth.instance;
+
+  final FirebaseDatabase _database = FirebaseDatabase.instance;
+
+  User? get currentUser => _auth.currentUser;
+
+  // ================= LOGIN =================
+
+  Future<UserCredential> login({
+    required String email,
+    required String password,
+  }) async {
+    return await _auth.signInWithEmailAndPassword(
+      email: email,
+      password: password,
+    );
+  }
+
+  // ================= REGISTER =================
+
+  Future<UserCredential> register({
+    required String name,
+    required String email,
+    required String password,
+  }) async {
+    UserCredential credential = await _auth.createUserWithEmailAndPassword(
+      email: email,
+      password: password,
+    );
+
+    final uid = credential.user!.uid;
+
+    await _database.ref('users').child(uid).set({
+      'uid': uid,
+      'name': name,
+      'email': email,
+      'created_at': DateTime.now().toIso8601String(),
+    });
+
+    return credential;
+  }
+
+  // ================= LOGOUT =================
+
+  Future<void> logout() async {
+    await _auth.signOut();
+  }
+
+  // ================= GET USER =================
+
+  Future<Map<String, dynamic>?> getUserData() async {
+    if (_auth.currentUser == null) {
+      return null;
+    }
+
+    final uid = _auth.currentUser!.uid;
+
+    final snapshot = await _database.ref('users').child(uid).get();
+
+    if (!snapshot.exists) {
+      return null;
+    }
+
+    return Map<String, dynamic>.from(snapshot.value as Map<dynamic, dynamic>);
+  }
+}
diff --git a/Source Code Mobile/firebase_service.dart b/Source Code Mobile/firebase_service.dart
new file mode 100644
index 0000000..2216156
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+++ b/Source Code Mobile/firebase_service.dart	
@@ -0,0 +1,42 @@
+import 'package:firebase_database/firebase_database.dart';
+
+class FirebaseService {
+  static final FirebaseDatabase _database = FirebaseDatabase.instance;
+
+  // ================= CURRENT =================
+
+  static DatabaseReference currentRef = _database.ref('monitoring/current');
+
+  // ================= AC =================
+  // Path untuk mengirim perintah dari Flutter ke ESP32 (script expects '/ac/control')
+  static DatabaseReference acCommandRef = _database.ref('ac/control');
+  static DatabaseReference acStateRef = _database.ref('ac/state');
+  static DatabaseReference acConfigStatusRef = _database.ref('ac/config_status');
+  static DatabaseReference acConfigBrandsRef = _database.ref('ac/config_brands');
+  static DatabaseReference acAutoTriggerHistoryRef = _database.ref('ac/auto_trigger_history');
+
+  // ================= HISTORY =================
+
+  static DatabaseReference monitoringHistoryRef = _database.ref(
+    'monitoring/history',
+  );
+
+  static DatabaseReference controlHistoryRef = _database.ref('history_control');
+
+  // ================= NOTIFICATION =================
+
+  static DatabaseReference notificationRef = _database.ref('notification');
+
+  // ================= IR RECEIVED =================
+
+  static DatabaseReference irReceivedRef = _database.ref('ir_received');
+
+  // ================= IR LEARNED & COMMANDS =================
+
+  static DatabaseReference irLearnedRef = _database.ref('ir_learned');
+  static DatabaseReference irCommandsRef = _database.ref('ir_commands');
+
+  // ================= USERS =================
+
+  static DatabaseReference usersRef = _database.ref('users');
+}
diff --git a/Source Code Mobile/notification_service.dart b/Source Code Mobile/notification_service.dart
new file mode 100644
index 0000000..58384dc
--- /dev/null
+++ b/Source Code Mobile/notification_service.dart	
@@ -0,0 +1,42 @@
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+
+class NotificationService {
+  static final FlutterLocalNotificationsPlugin _plugin =
+      FlutterLocalNotificationsPlugin();
+
+  static const AndroidNotificationChannel _channel = AndroidNotificationChannel(
+    'air_quality_channel',
+    'Kualitas Udara',
+    description: 'Notifikasi sistem monitoring kualitas udara & AC otomatis',
+    importance: Importance.high,
+    playSound: true,
+  );
+
+  static Future<void> initialize() async {
+    const androidInit = AndroidInitializationSettings('@mipmap/ic_launcher');
+    const initSettings = InitializationSettings(android: androidInit);
+    await _plugin.initialize(initSettings);
+
+    final androidPlugin = _plugin.resolvePlatformSpecificImplementation<
+        AndroidFlutterLocalNotificationsPlugin>();
+    await androidPlugin?.createNotificationChannel(_channel);
+    await androidPlugin?.requestNotificationsPermission();
+  }
+
+  static Future<void> showNotification({
+    required String title,
+    required String body,
+    int id = 0,
+  }) async {
+    final androidDetails = AndroidNotificationDetails(
+      _channel.id,
+      _channel.name,
+      channelDescription: _channel.description,
+      importance: Importance.high,
+      priority: Priority.high,
+      icon: '@mipmap/ic_launcher',
+    );
+    final notifDetails = NotificationDetails(android: androidDetails);
+    await _plugin.show(id, title, body, notifDetails);
+  }
+}