Grade 9 Books, developed by Mayush Singh, is a free Android application aimed at students in grade 9. The app offers English medium books on various subjects, including math, science, and social studies. The program boasts a user-friendly interface with an aesthetic theme that makes it easy to navigate.

One of the most significant features of Grade 9 Books is its ad-free environment that eliminates distractions and allows students to focus on their studies. The program's interface is designed to create an easy-to-learn environment, which makes it an ideal learning tool for students.

Overall, Grade 9 Books is an excellent educational resource for students looking for a user-friendly and distraction-free learning environment. However, it is worth noting that the developer's contact information is provided within the app, which may not be suitable for some users.