Tập Viết Chữ Cái Tiếng Việt is a free Android app developed by Thanh Tam 123. It falls under the Education & Reference category and is designed to help children learn to write Vietnamese letters. The app offers a visual and interactive way of learning, showing each stroke at a slow pace and using different colors to distinguish between strokes.

One of the key features of the app is the direct writing practice, where children can trace each stroke and create letters with ease. The app provides a broken line for each stroke, making it easier for children to follow and learn the correct form of each letter. The app also includes a guiding arrow to show the direction of the stroke. Overall, Tập Viết Chữ Cái Tiếng Việt is a useful tool to help children learn to write Vietnamese letters in a fun and interactive way.