Cool Math Flash Cards is a full version iPhone app developed by Corey Smith in the Education & Reference category. This app is designed to help users improve their math skills by practicing addition, subtraction, multiplication, and division. It offers smart multiple-choice answer generation and adaptive difficulty challenge mode, which increases the difficulty level as the user's skill rating increases.

One of the unique features of this app is the ability to toggle between multiples or problem types, making it easy for users to focus on specific areas they want to improve. The app also offers five warm background colors to choose from, enhancing the user experience.

In addition, Cool Math Flash Cards offers global leaderboards for skill rating and best streak, allowing users to challenge friends and see how they rank against the rest of the world. This app is perfect for kids in 2nd to 6th grade, as well as anyone who wants to practice their math skills.

Overall, Cool Math Flash Cards is an excellent math practice app that offers adaptive difficulty and colorful backgrounds to make learning math fun. With its smart multiple-choice answer generation and global leaderboards, users can improve their skills and challenge themselves to achieve a 100% skill rating.