Abacus is a free, easy-to-use calculator application that allows users to perform various calculations using their fingers. This simple abacus app has a user-friendly interface that is perfect for those who are not tech-savvy.

The app offers basic math functions such as addition, subtraction, multiplication, and division. It is perfect for those who need a quick and easy way to perform simple calculations. The app also has a feature that allows users to save their calculations for future reference.

Overall, Abacus is an excellent app for those who are looking for a simple and effective calculator. It is perfect for students, professionals, and anyone who needs to perform quick and easy calculations on the go.