PrepAir - Entrance Preparation is a free Android app developed by T4 Technology that aids in the preparation of various competitive exams. With courses available for 10+2 Science, Diploma in Nursing and CTEVT, Bachelors in Engineering, Medical/MBBS, Law, CSIT, CMAT, Bachelors in Public Health, Agriculture and Forestry, Licensure in Medical, Medical Laboratory, Nursing, and Pharmacy, Shikshak Seva Aayog - Pra.Vi/Ni.Ma.Vi/Madhyamik Tahaka Sabai Ra Shikshak Adhyapan Anumati Patra, and Nepal Swasthya Seva- Staff Nurse, Health Assistant, the app offers a wide range of topics to study.

The app's features include topic-wise practice questions, mock and pocket tests, live tests, daily doses for refreshment, events timeline, and upcoming PrepCom - PrepAir Community. With these features, users can assess their preparation level, understand their weak areas, and improve their performance. PrepAir - Entrance Preparation is an excellent tool for anyone looking to take competitive exams and wants to prepare themselves thoroughly.