Tieng Viet Lop 1 - Tap 1 is an educational app developed by Tracy Duong for Android devices. This free app is designed to supplement the Vietnamese language curriculum for first-grade students, providing a digital version of the textbook with additional features to support learning. The app includes 83 lessons covering 512 words, phrases, poems, and stories, along with corresponding images and audio recordings. The app's interface is user-friendly, with a font that mimics handwriting to make it easier for children to practice writing.

One of the app's key features is the use of illustrations to help children understand abstract or difficult-to-grasp concepts in the textbook. Additionally, each word, phrase, and sentence can be clicked on to hear its pronunciation. The app also includes a search function to help users quickly find specific lessons. While the app is a valuable tool for students and parents, it is not intended to replace the physical textbook. Overall, Tieng Viet Lop 1 - Tap 1 is a useful and engaging app for first-grade Vietnamese students to supplement their language learning.