Ngữ pháp tiếng anh is a free Android app that provides a compact system for learning the basics of English grammar. With this app, users can easily study and look up English grammar rules. The app's main features include an offline learning content system, an easy-to-use catalog system that displays content when swiping, and accurate, basic grammar rules. This app is completely free for Android users.

Ngữ pháp tiếng anh is an excellent app for anyone who wants to learn the basics of English grammar in a simple and easy way. It is especially useful for those who are constantly on-the-go and may not have access to Wi-Fi or 3G. The app's offline learning system allows users to study anytime, anywhere. Overall, Ngữ pháp tiếng anh is a highly recommended app for anyone who wants to improve their English grammar skills.