# 脳トレ21 vs なんちゃって２１

The clearest difference is update cadence: なんちゃって２１ at monthly against 脳トレ21's every 3 months. 脳トレ21's advantage is iOS requirement (11.0 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

脳トレ21 ships an update every 3 months, なんちゃって２１ monthly. The most recent releases landed on November 11, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | 脳トレ21 | なんちゃって２１ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Monthly** |
| Size | 107 MB | 116 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ZERONE](https://appshunter.io/developer/1708775781) | [FUKUROU](https://appshunter.io/developer/1603805098) |

## What reviewers say

### 脳トレ21

[App page](https://appshunter.io/ios/app/21/id1471846944)

**Features:** macOS Compatibility

**In-app purchases:** none


### なんちゃって２１

[App page](https://appshunter.io/ios/app/id6698864400)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 脳トレ21 free?

脳トレ21 is free to download, with no in-app purchases.

### Is なんちゃって２１ free?

なんちゃって２１ is free to download, with no in-app purchases.

### Do 脳トレ21 or なんちゃって２１ have ads?

Both 脳トレ21 and なんちゃって２１ show ads.

### Which is updated more often, 脳トレ21 or なんちゃって２１?

脳トレ21 ships an update every 3 months, and なんちゃって２１ monthly. Most recently, 脳トレ21 was updated on November 11, 2026 and なんちゃって２１ on September 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*