diff --git a/app.py b/app.py
index d2430e2..3bea4bb 100644
--- a/app.py
+++ b/app.py
@@ -5,6 +5,7 @@ Modularized version with Blueprints
 
 import logging
 import os
+import socket
 from flask import Flask
 from flask_wtf.csrf import CSRFProtect
 from models import db
@@ -99,12 +100,38 @@ def create_app(config: dict | None = None) -> Flask:
 app = create_app()
 
 
-if __name__ == '__main__':
-    logger.info("=" * 50)
-    logger.info("Tipptrainer gestartet")
-    logger.info(f"Version: {app.config['APP_VERSION']}")
-    logger.info(f"Lektionen geladen: {len(app.config['LESSONS'])}")
-    logger.info("Debug-Info verfügbar unter: http://127.0.0.1:5000/debug")
-    logger.info("=" * 50)
+def get_lan_ip() -> str:
+    """Ermittelt die LAN-IP-Adresse dieses Rechners (Best-Effort).
 
-    app.run(debug=True, host='0.0.0.0', port=5000)
+    Öffnet einen UDP-Socket zu einer externen Adresse, um das ausgehende
+    Interface zu bestimmen – es werden dabei keine Daten gesendet.
+    Fällt bei Fehlern auf 127.0.0.1 zurück.
+    """
+    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    try:
+        s.connect(('8.8.8.8', 80))
+        return s.getsockname()[0]
+    except OSError:
+        return '127.0.0.1'
+    finally:
+        s.close()
+
+
+if __name__ == '__main__':
+    DEBUG = True
+    PORT = 5000
+
+    # Banner genau einmal ausgeben: ohne Reloader sofort, mit Reloader nur
+    # im Worker-Prozess (WERKZEUG_RUN_MAIN), nicht im Supervisor.
+    if not DEBUG or os.environ.get('WERKZEUG_RUN_MAIN') == 'true':
+        lan_ip = get_lan_ip()
+        logger.info("=" * 50)
+        logger.info("Tipptrainer gestartet")
+        logger.info(f"Version: {app.config['APP_VERSION']}")
+        logger.info(f"Lektionen geladen: {len(app.config['LESSONS'])}")
+        logger.info(f"Tipp-Training lokal:  http://127.0.0.1:{PORT}")
+        logger.info(f"Tipp-Training im LAN: http://{lan_ip}:{PORT}")
+        logger.info(f"Debug-Info:           http://127.0.0.1:{PORT}/debug")
+        logger.info("=" * 50)
+
+    app.run(debug=DEBUG, host='0.0.0.0', port=PORT)
diff --git a/tests/test_integration_progress.py b/tests/test_integration_progress.py
index 7aed9b4..c69786c 100644
--- a/tests/test_integration_progress.py
+++ b/tests/test_integration_progress.py
@@ -5,7 +5,7 @@ import unittest
 import os
 os.environ['FLASK_TESTING'] = 'true'  # Set before importing app
 
-from app import app, db
+from app import create_app, db
 from models import Progress, LessonProgress
 from services.progress_service import ProgressService
 
@@ -15,10 +15,11 @@ class TestProgressServiceIntegration(unittest.TestCase):
 
     def setUp(self):
         """Setup: Test-App und In-Memory-Datenbank"""
-        app.config['TESTING'] = True
-        app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///:memory:'
-        app.config['WTF_CSRF_ENABLED'] = False
-        self.app = app
+        self.app = create_app({
+            'TESTING': True,
+            'SQLALCHEMY_DATABASE_URI': 'sqlite:///:memory:',
+            'WTF_CSRF_ENABLED': False,
+        })
         self.app_context = self.app.app_context()
         self.app_context.push()
         db.create_all()
@@ -259,10 +260,12 @@ class TestResolveCurrentLessonIndex(unittest.TestCase):
     """Tests für die zentrale Lektions-Auflösung (Resume + Validierung)."""
 
     def setUp(self):
-        app.config['TESTING'] = True
-        app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///:memory:'
-        app.config['WTF_CSRF_ENABLED'] = False
-        self.app_context = app.app_context()
+        self.app = create_app({
+            'TESTING': True,
+            'SQLALCHEMY_DATABASE_URI': 'sqlite:///:memory:',
+            'WTF_CSRF_ENABLED': False,
+        })
+        self.app_context = self.app.app_context()
         self.app_context.push()
         db.create_all()
 
diff --git a/tests/test_integration_statistics.py b/tests/test_integration_statistics.py
index 591ab2b..8c5c94b 100644
--- a/tests/test_integration_statistics.py
+++ b/tests/test_integration_statistics.py
@@ -6,7 +6,7 @@ import os
 os.environ['FLASK_TESTING'] = 'true'  # Set before importing app
 
 from datetime import timedelta, date
-from app import app, db
+from app import create_app, db
 from models import LessonStatistic, DailyPractice
 from services.statistics_service import StatisticsService
 
@@ -16,10 +16,11 @@ class TestStatisticsServiceIntegration(unittest.TestCase):
 
     def setUp(self):
         """Setup: Test-App und In-Memory-Datenbank"""
-        app.config['TESTING'] = True
-        app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///:memory:'
-        app.config['WTF_CSRF_ENABLED'] = False
-        self.app = app
+        self.app = create_app({
+            'TESTING': True,
+            'SQLALCHEMY_DATABASE_URI': 'sqlite:///:memory:',
+            'WTF_CSRF_ENABLED': False,
+        })
         self.app_context = self.app.app_context()
         self.app_context.push()
         db.create_all()