NDA Exam Prep is an Android app designed by Sana Edutech to help students prepare for the National Defense Academy (NDA) and NA exams in India. The app offers past 14 years' question paper sets with solutions in quiz format, as well as model papers covering Mathematics, English, Science, and General Knowledge (GK) subjects. With over 15,000 questions, the app is properly categorized into multiple sections, focusing only on upcoming NDA exams.

One of the app's best features is its fast user interface, which is presented in an easy-to-use quiz format. It is designed to work on all screens, including phones and tablets. Users can review their answers against the correct answers to learn quickly and get detailed reports on their performance for all quizzes attended. The app covers a wide range of subjects such as Mathematics, GK, Indian Polity, Basic Economics, History, Geography, Science, and Indian Armed Forces. The app is free for all students who want to secure a role in NDA.