Mental Math
- Added Greek translation contributed by Nick Batzakis. Thank you! :)
- Added German translation.
- fixed bug for devices with older version of SQLite
- Enable per-app language selection via Android system settings (requires Android 13 or higher)
- Prepared for sound effects for correct and incorrect answers in the future.
- updated dependencies
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 game with preset settings for a fair and fresh challenge for everyone.
Difficulty Calculation
Problem 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 problems 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 match to view a detailed summary of its results.
Practice Reminders
Set up periodic reminders to support regular mental math practice. Notifications are sent in the evening (around 6 p.m.) and can be scheduled daily, every three days, or weekly.
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, Private, Free & Ad-free
"Mental Math" is fully open source, free to use, and does not contain any ads. It also does not collect, store, or process any personal data, nor does it use trackers or third-party services.
- Author: HeldDerTierwelt
- License: GNU General Public License v3.0 only
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Versions
Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.
Download F-Droid-
arm64-v8aarmeabi-v7ax86x86_64This version requires Android 7.0 or newer.
It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Download APK 11 MiB PGP Signature | Build Log
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arm64-v8aarmeabi-v7ax86x86_64This version requires Android 7.0 or newer.
It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Download APK 11 MiB PGP Signature | Build Log
-
arm64-v8aarmeabi-v7ax86x86_64This version requires Android 7.0 or newer.
It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Download APK 11 MiB PGP Signature | Build Log
- Removed “Total Score” and renamed “Active Score” to simply “Score” to reduce confusion
- Added tooltips to the game overview for improved clarity
- Reworked the speed statistic: now displayed as time per correct answer instead of correct answers per minute
- Fixed a crash when using the “About” or “Feedback” options on systems without a default browser or mail client
- Added a message to the problem overview when no problems have be
- Also added a popup notification when switching input direction in game
- Improved a few colors
- Dependency updates