ACE UPSC is a free all-in-one app developed by Appztag for UPSC IAS exam preparation. The app offers topic-wise MCQ Quizzes according to the IAS prelims syllabus, making it very helpful for UPSC IAS PrelimsIt features solved previous year's prelim exams papers, which gives an idea about the questions asked in UPSC prelims and CSAT exams. The app also provides study material for IAS exams preparation such as NCERT books, NIOS study material, Yojana Magazines, and much more.

The app contains quizzes on various subjects such as History, Environment and Biodiversity, Indian Polity, Art and Culture, Geography, and Economy and Growth. It also has downloads for Yojana Magazines, NCERT Books, and NIOS study material for Civil Services Preparation. The developers have plans to add hundreds of quizzes and study material in the future, which will boost the preparation for civil services exams. ACE UPSC is an excellent app for those who want to prepare for the UPSC IAS exam and contains everything one needs for IAS preparation.