# 脳トレ21

> 脳トレ21 (iPhone/iPad app by ZERONE.)

- Source: https://appshunter.io/ios/app/21/id1471846944 (this page in markdown: same URL + `.md`)
- Developer: [ZERONE](https://appshunter.io/developer/1708775781)
- Category: Games, Entertainment, Casino, Word
- Price: Free
- Age rating: 4+
- Requires: iOS 11.0 · 107 MB
- Languages: English
- Released: 2019-07-25
- Data updated: 2026-06-01
- User reviews in markdown: https://appshunter.io/ios/app/21/id1471846944/reviews.md

## What is 脳トレ21?

足して21の数字をつくれ！
ブラックジャック風新感覚脳トレパズルです。
簡単操作のゲームであなたの脳年齢を診断します。


「脳トレ21」はシンプルでハマり度120%の脳トレゲームです。
操作方法は数字をタップするだけ！

遊べば遊ぶほど脳が活性化されます。
あなたの脳は何歳ですか？？


## Version history (last 5 releases)

### 1.0.9 — 2021-03-16

-Minor bug fix
-Performance improvements

### 1.0.8 — 2020-10-15

Fixed a bug related to advertising and now supports iOS14

### 1.0.6 — 2020-07-19

bug fix

### 1.0.5 — 2020-06-12

bug fix

### 1.0.3 — 2020-04-18

bug fix

## Apps similar to 脳トレ21

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [なんちゃって２１](https://appshunter.io/ios/app/id6698864400) | — | Free | Games |
| [「見せ算グランプリ」話題の計算ネタゲーム](https://appshunter.io/ios/app/id6475210387) | — | Free | Games |
| [97 – Prime Number Puzzle](https://appshunter.io/ios/app/97-prime-number-puzzle/id6475675534) | — | Free | Games |
| [GuessNum（ゲスナン）](https://appshunter.io/ios/app/guessnum/id6747065066) | — | $0.99 | Games |
| [無限リーチ](https://appshunter.io/ios/app/id6450327650) | — | Free | Games |

## More apps by ZERONE

- [スイーツドラゴン -完全無料！新感覚シューティングゲーム-](https://appshunter.io/ios/app/id1023598820)
- [One Stroke Puzzle : PURURUN](https://appshunter.io/ios/app/one-stroke-puzzle-pururun/id1145262669)
- [Brain Training Puzzle! PITAPON](https://appshunter.io/ios/app/brain-training-puzzle-pitapon/id1156049875)
- [PURUPURU：ぷるぷる](https://appshunter.io/ios/app/purupuru/id1163693695)
- [大人がハマる物理脳トレ！ポポポン～頭が良くなる脳トレパズル～](https://appshunter.io/ios/app/id1180521682)
- [Make 10 - Logical Brain](https://appshunter.io/ios/app/make-10-logical-brain/id1192640935)

All apps by ZERONE: https://appshunter.io/developer/1708775781

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*