UPSC IAS Prelim Practice Exam is a free Android app developed by Prexam for students preparing for the UPSC IAS Prelims exam. The app aims to help students improve their performance and increase their confidence to face the actual exam. It offers scientifically designed tools to help students prepare for their exams efficiently.

The app covers two main subjects: General Studies and CSAT. In the free version, students can take three tests in "Take a Test" and practice with a few free questions for three chapters for each subject in "Practice Qs". The premium version of the app costs Rs.900 and offers unlimited "Take a Test" and access to the complete question bank using "Practice Qs". The app does not require an internet connection, except for downloading, updating, or buying the premium version.