On Luyen is a comprehensive test prep and practice app designed specifically for Vietnamese high school students. It covers a wide range of subjects including Maths, Physics, Chemistry, English, Biology, History, Geography, and Civic Education.

The app offers self-pacing practices, allowing students to reinforce their learning immediately after studying each unit. Students can easily arrange their study schedule according to their needs. With a question bank consisting of over 120,000 items, each question comes with detailed answers and explanations. Additionally, there are theory flashcards and video lectures related to each question, ensuring a comprehensive learning experience.

On Luyen also provides testing features to help students prepare for various exams such as 45-minute tests, end term exams, and national high school exams. The app generates thousands of tests based on the standard national curriculum and includes previous tests from renowned schools across Vietnam. Detailed instructions and reports are provided for each test paper, allowing students to analyze their performance and identify areas for improvement.

The app also offers useful supporting functions such as bookmarking, allowing students to save interesting or challenging questions for future reference. The doubt feature enables students to ask questions and receive answers for any test item. Additionally, the learning progress feature provides a detailed report of every attempt, allowing students to track their progress over time.

On Luyen is a valuable tool for Vietnamese high school students, providing comprehensive test preparation and practice in a user-friendly app format. It offers a wealth of resources and features to enhance learning and improve exam performance.