AppMarketSpy › Education › Sumflash: Mental Math Flash
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App info
- Developer
- Toru Fukui
- Category
- Education
- Released
- Oct 2, 2026
- Version
- 1.0.2 (Oct 12, 2026)
- Price
- Free
- Size
- 14.0 MB
- Requires
- iOS 17.0
- Age rating
- 4+
- Languages
- English, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
In-app purchases
| Premium (Monthly) | $1.99 |
Current prices, App Store US.
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About Sumflash: Mental Math Flash
Numbers appear on screen one at a time, each for just a moment. Add them all up in your head and enter the total. This is flash mental math, the way it's practiced with the soroban (Japanese abacus). There are 30 levels, and you practice at the one you choose. - See why you missed After each answer, review every number that flashed along with the running total at that point. Numbers where a carry happened are highlighted, so you can spot exactly where you slipped. Replay the same problem, or replay it slowly. - From 0.2 to 5.0 seconds Set the speed yourself anywhere from 0.2 to 5.0 seconds per number. - 30 levels From 1 digit, 3 numbers, 1 second each, each level changes one thing at a time: more numbers, then faster, then more digits (up to 3 digits, 15 numbers, 0.5 seconds). Change your level anytime from the home screen. Already experienced? Pick a higher starting point on the first…
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