Ôn thi bằng lái xe - B2OTO is a free education and reference app developed by 123GoVn for Android devices. This app is designed to help users prepare for their driving test by providing them with a complete set of theoretical and practical driving lessons in the Vietnamese language.

The app includes a smart design that shortens the user's learning time while ensuring the quality of their practice. The system consists of 450 questions divided into different topics, allowing users to save their current learning position. It also features a complete system of Vietnamese traffic signs, 15 sets of mock tests from easy to difficult, and statistical score tracking for each test. The app also provides theoretical test preparation lessons, tips, and tricks. Users can save their incorrect answers, allowing them to review and memorize the concepts better. The app's data is updated regularly, with the latest update being in.