UPSC Prelims IAS Pre Solutions is a unique app that provides a comprehensive study of the various topics that are included in the UPSC civil services exam. This is a user-friendly app that is designed to help the users understand the concept of each and every topic in a simple manner. 

The app contains the last 20 years' worth of preliminary questions from the UPSC examination. It also provides a detailed explanation to each and every question so that the users can understand the nature of the questions in a simple manner. It also contains a lot of model questions so that the users can practice and understand the concepts in a simple manner.

It also contains a lot of other information such as the various topics that are included in the UPSC civil services exam, the importance of each and every topic, a detailed explanation of how the user can rank the candidates, and many more.