Toán Lớp 3 is an Android app developed by Tri Tuệ Việt. It falls under the education and reference category, and it's free to use. The app is designed to simulate the math curriculum for third-grade students based on the Vietnamese Ministry of Education and Training's textbook.

Toán Lớp 3 offers a wide range of features to help students and parents with their studies. It provides an overview of the entire third-grade math curriculum, including different exercises, interactive quizzes, and fun games to keep students engaged. The app also offers a variety of problem-solving exercises that challenge students to think creatively and develop their analytical skills.

The app's interface is colorful and engaging, with vivid images and animations that make learning math fun. It's an excellent tool for parents who want to help their children with their studies without having to rely solely on textbooks. However, it should be noted that Toán Lớp 3 is not a replacement for the official textbook, but rather a supplementary tool to support the learning process.

Overall, Toán Lớp 3 is an excellent app that provides a fun and interactive way for students to learn math. It's a must-have tool for parents who want to support their children's education and help them develop their math skills.