Soroban is a free calculator app developed by s-app planning for Android devices. It falls under the Utilities & Tools category and offers a simple interface for basic calculations. The app is named after the traditional Japanese abacus which is also known as Soroban.

The app is easy to use and operates with finger gestures. It offers basic arithmetic operations such as addition, subtraction, multiplication, and division. The app also has a reset button on the upper left corner to clear the calculation history.

Overall, Soroban is a straightforward calculator app that can be useful for basic calculations. However, it lacks advanced features such as scientific functions or unit conversions. It is a good option for those who prefer a simple and easy-to-use calculator app.