Abacus Mental Math Training is a specialized educational app designed for iPhone that focuses on improving mental calculation skills through structured training. Compliant with the World Abacus Mental Calculation Federation's standards, it offers a comprehensive grading system and a variety of engaging content. Users can choose between Challenge Mode and Custom Mode, with the former providing 10 levels and 200 stages that gradually increase in difficulty, aligned with official assessment standards. This mode allows users to prepare for various abacus mental calculation exams, including those relevant for accounting certifications.

The Custom Mode features options for Flash Calculation and tailored Abacus Mental Calculation exercises, enabling users to adjust calculation methods, number ranges, and time limits to suit their learning preferences. The app boasts a user-friendly interface and interactive elements that enhance the learning experience. It is ideal for students, enthusiasts of speed calculation, and those preparing for formal assessments, making it a valuable tool for anyone looking to improve their mathematical proficiency.