Mental Math Icon Mental Math

App Overview

"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.

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Features

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

• Task Mode lets you complete a fixed number of tasks (10, 20, 30, 40, or 50).
• Timed Mode challenges you to solve as many tasks 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 tasks to compare scores with friends.
2. Start a new game with preset settings for a fair and fresh challenge for everyone.

Difficulty Calculation

Task difficulty is determined using algorithms based on column addition, column subtraction, long multiplication, and long division, creating realistic and well-balanced exercises.

Detailed Results

After each game, view a detailed summary that includes your selected settings, your performance (accuracy, speed, and score), and a complete list of all your tasks and answers for review.

Personal Leaderboard

Your top 10 results are displayed separately for each combination of settings, allowing you to easily track your progress. You can also review detailed summaries of your top games at any time.

Game History

Explore the complete history of all your scored games. You can sort the list by time or numerically to find specific games. Anytime, you can revisit any game to view a detailed summary of its results.

Clean Design

A simple and minimalist app design with no unnecessary elements or distractions, designed to keep your focus fully on mental math training. Supports both light and dark modes.

Open Source and Privacy

"Mental Math" is fully open source, free to use, and does not collect or process any personal data. It requires no permissions, contains no ads, and runs entirely offline to respect your privacy.

Screenshots

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Privacy Policy

Your privacy is important. This app does not collect any personal data, does not require any permissions, and does not use any trackers, ads, or third-party services. Your use of the app is completely anonymous.

If you have any questions or feedback, feel free to reach out via mental_math_feedback@pm.me.

License Information

Mental Math © 2025 HeldDerTierwelt
This project is licensed under the GNU General Public License Version 3 (GPLv3).

Donation

If you enjoy this app, feel free to support me via Ko-Fi. It means a lot to me ❤️.

Legal Notice

This website is part of a personal, non-commercial open source project and is provided for informational purposes only. Responsible according to § 5 TMG:

Alexander Goy
aka HeldDerTierwelt
mental_math_app@pm.me