A free program for Android, by VD.

English Grammar Master is a free offline grammar book. This app is a useful reference guide that provides comprehensive information on a variety of topics, including adjectives, adverbs, articles, capitalization, conditions, conjunctions, degree of comparison, determiners, direct and indirect speech, and many more. You can also learn more about the structure of English sentences, the parts of speech, and the different types of English words and sentences. This app will help you improve your writing skills and boost your vocabulary.

If you are preparing for a grammar exam, or just want to improve your English grammar and vocabulary, this app is a useful tool that will help you pass your exam with good grades. This is an English grammar reference book that can be used for any purpose, whether it is for a school, college, university, or any other institution.