Học tốt Tiếng Việt lớp 4 is an Android application developed by NDT Production. It is a free educational app that falls under the Education & Reference category. The app is designed to help grade 4 students study the Vietnamese language, improve their writing skills, and prepare for exams.

This app provides a wide range of sample papers, exercises, and lessons that cater to the Vietnamese curriculum. The app's user interface is simple and easy to navigate, making it accessible to students of all levels. Additionally, the app is updated regularly with new content, ensuring that students always have access to fresh material to study.

Overall, Học tốt Tiếng Việt lớp 4 is a great tool for Vietnamese students looking to improve their Vietnamese language skills. The app's extensive library of content and user-friendly interface make it a valuable resource for grade 4 students preparing for their exams.