Deutsch Grammatik Test is a free, offline grammar practice app developed by Compos Apps S.L. for Android 9.0 and above. The app offers 50 tests with thousands of questions to help you improve your German grammar skills. It is perfect for those who are studying German for travel, work, or study purposes.

The app is designed to be user-friendly with a clear interface and supports both portrait and landscape views. The best part is that it works offline, so you can practice your grammar skills anytime and anywhere. When you make a mistake, the app provides simple explanations to help you understand why your answer was incorrect.