IMO - International Math is a free educational app available for iPhone and iPad. Developed by Hoa Nguyen Quang, this app is designed to help students practice and prepare for the International Mathematical Olympiad (IMO), which is a world championship mathematics competition for high school students.

The app offers a range of features to support students in their preparation. It includes 8 levels, catering to students from grade 1 to grade 8. The two modes available are Practice and Test. In Practice mode, students can choose from a variety of topics to practice, making it easy to focus on specific areas of improvement.

Additionally, the app allows students to check their answers, view their results, and access explanations for each question in the practice mode. In Test mode, there are numerous test lessons available, and students can save their test results for future reference.

The app also provides a question list and question status review, allowing students to easily track their progress. Navigation between questions is made simple with the option to swipe left or right.

Overall, IMO - International Math is a comprehensive app that provides students with a platform to practice and enhance their mathematical skills in preparation for the International Mathematical Olympiad.