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CompareOpen in Google Play
Where this app stands in Japan, updated 14 Oct 2026
Top free · Educational
#70 ▲2
Top grossing
Not in this chart today
Top paid
Not in this chart today
| Date | Free |
|---|---|
| 14 Oct 2026 | #70 |
| 13 Oct 2026 | #72 |
| 12 Oct 2026 | #64 |
| 11 Oct 2026 | #62 |
| 10 Oct 2026 | #58 |
| 8 Oct 2026 | #58 |
Best rank in each country today. Click a country to see its graph.
Activate the brain through mental arithmetic with brain training apps.
■ Brain Training Apps Activate the brain through mental arithmetic with brain training apps. Begin mental gymnastics once a day! ■ Application Features Have a great time playing with family and friends. Play with a difficulty that matches your level. Compete for the best time in the world rankings. Become skilled at arithmetic, useful for your mathematical studies. You can also play offline. Increase your ability to concentrate through brain activation.