657 Soru Bankası is a mobile application aimed at state officials who are preparing for civil service exams. The app is designed to provide detailed explanations and study materials for 657 State Officials Law, which is one of the most important topics in these exams. The app is developed by Fatih Durmaz and is available for free on the Android platform.

The app comes with a wide range of features including comprehensive study materials, practice tests, and mock exams. With its user-friendly interface, you can easily navigate through various topics and explore the detailed explanations. The app also offers a summary of key concepts, which is helpful for quick revision.

Please note that the lite version of the app contains advertisements. However, you can download the ad-free PRO version from the Google Play Store for a nominal fee of 5 TL. Overall, 657 Soru Bankası is an excellent study guide for state officials preparing for civil service exams and is highly recommended.