Rubi Math is a free Android app developed by You Turn under the Education & Reference category. The app is an effort by a Government school teacher to provide free, easy-to-understand math lessons to students who cannot afford expensive coaching classes. The app contains a collection of videos that cover the entire school math curriculum and also prepare students for competitive exams.

The app is designed to provide an easy way for students to learn math. The videos are created by RUBI teacher, whose efforts to teach math in an easy way went viral on the internet. The app is a single source for all the videos and is available for free, making it accessible to students from all backgrounds. The app is constantly updated with new videos, ensuring that students have access to the latest teaching methods and techniques.