Soroban is a Japanese right brain training game that helps you to learn the arithmetic and to understand the concepts of the numbers. This application is a tool that lets you do your arithmetic in your head. It is a free game that is fun to play with a lot of benefits. The application helps you to learn the arithmetic by giving you an exercise in which you have to do the operation in your mind. You can play with the app in the following ways:

It is a free game. You can download it from Google Play. You can play it on your Android device.

The game is divided into three levels:

Simple - It is the simplest level. You have to do the operation in your mind. You can play with the app. 

Complex - It is the most difficult level. The number of digits increases.

Advanced - It is the most advanced level.