Tieng Viet Lop 4 is an Android-based educational software designed to assist fourth-grade students in their studies. The software is based on the Vietnamese Language textbook for fourth-grade students, published by the Ministry of Education and Training.

This free software helps students understand the reading materials in the textbook and provides instructions on how to solve the exercises. The content includes hints for solving exercises for all 35 weeks of the two volumes of the Vietnamese Language textbook for fourth-grade students. However, it should be noted that the software is not a substitute for the textbook and the content provided is for reference only and does not guarantee the accuracy of the hints.