Abacus Lesson is an educational app developed by Hirokazu Komatsu, designed to teach users the art of mental arithmetic using an abacus. With the goal of solving math problems within 5 seconds, this app provides a comprehensive learning experience for individuals of all ages.

The app features all the lessons from the highly acclaimed Abacus Lesson series, which has garnered international recognition. These lessons have been reworked to be more detailed and easily understandable. Additionally, unique training methods, including finger movement exercises and mental arithmetic training, have been incorporated to enhance the efficiency of learning the abacus.

Abacus Lesson offers a range of improvements to enhance user experience. Users have the option to choose between vertical and horizontal screen orientations, as well as customize the position and size of the abacus and window. The app is ad-free, ensuring a distraction-free learning environment. Sound variations have been added, with the ability to finely adjust volume control. Users can also personalize the color of the abacus to their preference.

Furthermore, Abacus Lesson provides a sense of achievement with the opportunity to earn trophies by reaching specific goals. The app's operability has been optimized for smoother navigation and usage.

Whether you are a beginner or an advanced learner, Abacus Lesson is a valuable tool for mastering mental arithmetic with the abacus. Visit the support web page for more information.