NIOS Books is an Android app developed by SUPERCOP, available for free on the Google Play Store. The app is a great source of study material for students preparing for NIOS board exams and other competitive exams like UPSC IAS, CSAT, and state PSCs. The app contains NIOS study material for both secondary and senior secondary courses in Hindi and English.

The app covers a wide range of subjects, including Mathematics, Science, Social Science, Economics, Business Studies, Accountancy, Home Science, Psychology, Indian Culture and Heritage, and more. In addition, the app offers study material in Bengali, Sanskrit, and other languages. The app also includes courses like Data Entry Operations, Environmental Science, Tourism, Introduction to Law, Library & Information Science, and Indian Knowledge Tradition.

It is important to note that the app does not claim ownership or modification of the PDF files provided in the app. The app simply provides the material from the official NIOS website. The app is user-friendly and easy to navigate, making it a great resource for students looking for additional study material.