Mental Math

"Mental Math" is a simple and clean Android app for mental arithmetic training. You can practice on your own or challenge friends to compete and improve your skills. The app is open source and respects your privacy.

Customizable Training
Select which arithmetic operations to include (+, −, ×, ÷). For each operation, choose from nine difficulty levels to customize your training precisely to your skill level.

Two Game Modes
• Practice Mode lets you complete a fixed number of problems (10, 20, 30, 40, or 50).
• Timed Mode challenges you to solve as many problems as possible within a time limit (1, 2, 3, 4, or 5 minutes).

Challenge your Friends
You can share a game link to:
1. Replay a completed game with the exact same problems to compare scores with friends.
2. Start a new gam