A free program for Android, by Engineering Wale Baba.

ENGINEERING MATHEMATICS – II is a free mathematics book app that can be used for self-learning, reference and preparation for exams. This app is a comprehensive free handbook of Engineering Mathematics and covers all important topics. It contains detailed notes, diagrams, equations, formulas, and course material. The app is designed for quick learning, revisions, references at the time of exams and interviews. It also includes a lot of helpful resources that you can use for more in-depth study.

This app covers most of the related topics and provides a detailed explanation with all the basics topics. It also includes a lot of resources that you can use for more in-depth study.