Abacus is a free Android app developed by makinosoft. It belongs to the category of Utilities & Tools and offers a simple and easy-to-use abacus for users. The program has a basic structure with 6 or 7 digits and a beam on top that can be swiped to use the abacus. The app is designed to be used with a simple touch and flick motion, and the ball drops to the bottom after each calculation.

To start using Abacus, users need to swipe at the beam top for initialization. The app then builds up like a real abacus and is ready to be used. The program offers a realistic experience with the ability to swipe on the beam to perform calculations. The app is ideal for anyone looking for a simple abacus on their Android device.

Overall, Abacus is a great app for anyone who needs to perform simple calculations. It is easy to use and provides a realistic experience with its simple design and touch functionality.