UP SUB Inspector is a free educational mobile application developed by YCT EXPERT TEAM for Android devices. It is designed to help students and learners of all ages to improve their math skills and knowledge. The app covers various topics related to math, such as Number System, Simplification, Decimals and Fraction, Highest Common Factor, and Lowest Common Multiple.

Moreover, the app also covers other essential topics, including Ratio and Proportion, Alligation, Percentage, Profit-Loss, and Discount. The app also includes various complex topics such as Compound Interest, Partnership, Time & Work, Pipe and Cistern, and Mensuration. Furthermore, the app provides an in-depth analysis of Geometry, Arithmetical Computations & other Analytical, Use of Tables and Graphs, and Miscellaneous.

The app also includes various tests for students to self-assess their understanding of the topics covered in the app. These tests include Perception Test, Word Formation Test, Letter and Number Series, Word and Alphabet Analogy, Direction Sense Test, Logical Interpretation of Data, Forcefulness of Argument, and Determining Implied Meanings. The app is an excellent resource for students and learners who want to improve their math skills and prepare for competitive exams.