A free program for Android, by teachoo.

Teachoo – Accounts, Tax, NCERT Maths Class 6-12 is an educational app that helps you to learn and understand the concept of tax, its application and its effects. The app contains all the topics that are to be expected in the upcoming tax exam. Each topic is well explained in detail with the relevant questions and answers. You can also ask any question to the experts for help. The app is designed to help you in understanding the concepts in an easy and simplified manner. It contains all the relevant information that is to be expected in the upcoming tax exam.