If you are looking for a free educational app for your Android device, then "الصف الأول المتوسط" is worth checking out. Developed by خليل الخفاجي, this app is a one-stop solution for students of the first intermediate grade. It offers a range of books and exercise sheets that cover various subjects such as Islamic studies, Arabic, mathematics, English, science, social studies, and even computer science.

The app includes both books and exercise sheets for each subject, making it easier for students to study and revise the concepts. The app's interface is user-friendly and straightforward, making it easy for students to navigate and find the materials they need. Overall, "الصف الأول المتوسط" is an excellent app for students who want to learn and revise their lessons on the go.