(Open Source) Mental Math
Math games & brain training
Free · Designed for iPad. Not verified for macOS.
Free, open-source mental math training. Timed tests, custom drills, tricks — no paywalls.
A free, open-source mental math trainer. No ads, no paywalls, no locked content — every exercise and difficulty is included.
Sharpen your arithmetic with quick timed tests, custom drills, and a library of mental-math tricks. Everything runs offline and your progress stays on your device.
FEATURES
Timed Tests
A daily 60-second challenge plus sprints, a two-minute marathon, per-operation tests, and a hard mixed test — at four difficulty levels, each with best scores.
Custom Trainer
Pick a number domain (Times tables, Natural, Decimal, Money, Huge), choose one or more exercises, and set per-exercise difficulty from Easy to Super hard.
All the Operations
Addition, subtraction, multiplication, division, squares, square roots, fractions, percentages, and modulo.
Mental Math Tricks
Dozens of step-by-step tricks for faster addition, subtraction, multiplication, division, and squares — with worked examples and favorites.
Practice Any Trick
Every trick comes with a 60-second drill built for it: × 11 drills, squares ending in 5, numbers near 100, and more.
Magic Square
A number puzzle: make every row, column, and diagonal add up to the same total. Four levels, from 1-9 up to bigger number sets.
Progress Tracking
Solved totals, accuracy, best run, daily streak, longest streak, and a weekly activity view.
Fast Sessions
An on-screen keypad with instant answer checking and haptics.
No ads. No paywalls. No account required.
100% Open Source
The complete source code is public - see it, audit it, or contribute at https://github.com/Open-Apps-Studio/mental-math
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
New
- Practice this trick: every trick in Knowledge now has a 60-second drill built just for it
- Pick a difficulty for every test, from Easy to Super hard
- New game: Magic Square. Make every row, column and diagonal add up to the same number
Fixes
- An answer typed in the last second before time runs out now counts
- The Results screen no longer shows the round's close button
- Removed the Sound effects switch (the app has no sounds, so it did nothing)
- Better VoiceOver support and layout on iPhones with a home indicator
The developer, AHMET EMRE DEDELER, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- AHMET EMRE DEDELER
- Size
- 42.5 MB
- Category
- Education
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Ahmet Dedeler