Mr. Abacus Lite 2 is a free educational game available on Android that simulates the Japanese abacus, also known as soroban. It offers addition and subtraction problems to solve in the shortest time, making it a fun and engaging way to learn abacus math for kids and adults alike.

The lite version is a great way to try out the game and see if it's right for you before committing to the full version. The game is well-designed, with simple and easy-to-use controls and a clean and intuitive interface. The addition and subtraction problems are challenging enough to keep you engaged, but not so difficult that you get frustrated.

Future updates are planned, including the addition of a time chase mode and a mental mode, which will add even more excitement and challenge to the game. The recent addition of slide (drag) mode to move the beads is a welcome feature that enhances the overall experience.

Overall, Mr. Abacus Lite 2 is a great way to learn the abacus and practice addition and subtraction. It's a fun and educational game that will keep you engaged and entertained for hours.