Flash Mental Arithmetic-Simple is an educational application designed for iPhone users, focusing on enhancing mental arithmetic skills. The app features three standard difficulty levels: easy, normal, and difficult, allowing users to choose the mode that best suits their proficiency. Additionally, it offers custom modes, enabling a tailored experience for users seeking specific challenges.

This app serves as an effective brain training tool, encouraging users to improve their calculation speed and accuracy. By engaging with various arithmetic exercises, users can develop their cognitive abilities while enjoying the interactive format of the app. The combination of structured modes and customizable options makes it suitable for learners of all ages aiming to sharpen their mental math skills.