Math Drills - Math Flash Cards is an iPhone application developed by Jiangguo Yan. It falls under the category of Education & Reference and is designed to help users improve their math skills through interactive flashcards. The app offers practice in addition, subtraction, multiplication, and division, allowing users to answer math problems with handwritten digits.

With colorful stickers as rewards, Math Drills motivates users to achieve high scores and improve math facts fluency. The app is suitable for users of all ages, making it a great tool for students and adults alike. Users have praised the app for its ability to engage and motivate learners, resulting in improved math grades.

Math Drills is free to download, with an option for a Pro Unlimited in-app purchase that provides access to premium features and content. The app also offers a weekly subscription option for those who wish to unlock additional benefits. Overall, Math Drills - Math Flash Cards is a well-designed and effective app for practicing and improving math skills.