Hindi Word Book is an Android application developed by Sohid Uddin that aims to help users learn Hindi. This free app offers an English to Hindi dictionary, with words divided into categories for easy learning. Users can mark words as favorites and study them separately. The app also includes a pronunciation feature to help users improve their English speaking and listening skills.

Additionally, Hindi Word Book includes a plethora of idioms and phrases to increase users' vocabulary and make them experts in the English language. It also includes appropriate prepositions with meanings. This small dictionary-like word book is an excellent way to increase knowledge of the Hindi language in a smart way.