Chính tả Tiếng Việt Lớp 1 is an Android app developed by Nahu Studio to help children in their spelling and pronunciation. In the early stages of learning, children might find it difficult to visualize and pronounce certain letters and words properly. However, this app aims to solve that problem by training children to identify and spell words correctly.

The app offers a range of features, including the ability to pronounce a word or sentence as per the content in the class 1 textbook. The child is then required to choose the correct spelling from the options provided. Additionally, the app also offers a 30-second timer to complete the test and provides statistics on the results by question. The app also generates content heard and the wrong results automatically and offers the option to display sentences in printed or handwriting form.