سنتر اون لاين is a free educational app developed by UniyApps, aimed at facilitating and enhancing the learning process for secondary school students in Egypt and the Arab world. The app provides an innovative and modern platform for the most qualified teachers and academics to offer their expertise in all subjects related to the secondary school curriculum. It provides complete and free scientific content for all students, with a direct and easy communication channel between students and content providers.

The app offers a wide range of educational resources for each subject, such as explanatory videos, notes, reviews, illustrative images, comprehensive tests, and online exams. After watching each video, students can rate the quality of the explanation and how much they understood by answering a question that appears after each video. They can also add comments if they have any questions or need clarification, and the content provider can respond with additional information. Additionally, students can evaluate their learning progress by taking an online test after each video.

This revolutionary educational app provides an opportunity for students to improve their knowledge and skills quickly and easily from the comfort of their homes. The app is constantly updated with new features and resources, making it a valuable tool for secondary school students in Egypt and the Arab world.