English Grammar - Ngữ pháp tiếng Anh - Bài tập c is a free Android app developed by dopteams under the Education & Reference category. This app is designed to help users look up English grammar quickly on their phone. One of the most useful features of the app is that it can be used offline, which makes it more convenient for users who are always on-the-go.

The app offers a wide range of English grammar lessons from basic to advanced. Users can learn about the formula of tenses in English, formula for rewriting passive active sentences, table of irregular verbs and much more. Additionally, the app provides grammar exercises with full explanations and bilingual stories with translation to help users improve their English language skills. With English Grammar - Ngữ pháp tiếng Anh - Bài tập c, users can learn English anytime, anywhere completely free on their mobile phone.