Soroban is an Android app developed by VISION CRAFT that provides a digital version of the Japanese abacus. This app is designed to help users learn and practice the traditional calculation method of the soroban.

One of the standout features of Soroban is the smoothness of the abacus' movement, which provides a realistic experience for users. The sound effects accompanying the movements of the beads are also a nice touch, adding to the authenticity of the app.

Overall, Soroban is a great tool for anyone interested in learning and practicing the soroban calculation method. It's a free app that offers a unique and educational experience.