# 認知シャッフル睡眠法 vs 脳でんち

The clearest difference is in-app purchases: 脳でんち at none against 認知シャッフル睡眠法's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 認知シャッフル睡眠法 sells 2 in-app purchases, starting at $1.99 per month. 脳でんち asks for nothing beyond the download.

認知シャッフル睡眠法 ships an update every 6 weeks, 脳でんち every 2 months. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 認知シャッフル睡眠法 | 脳でんち |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Size | 136 MB | 7 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [mika kubo](https://appshunter.io/developer/1877061175) | [Masaaki Ohno](https://appshunter.io/developer/6799632703) |

## What reviewers say

### 認知シャッフル睡眠法

[App page](https://appshunter.io/ios/app/sleepwords/id6759151074)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SleepWords Premium (Monthly) | $1.99 | per month |
| SleepWords Premium (Yearly) | $19.99 | per year |


### 脳でんち

[App page](https://appshunter.io/ios/app/id6799632701)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 認知シャッフル睡眠法 free?

認知シャッフル睡眠法 is free to download, with in-app purchases available.

### Is 脳でんち free?

脳でんち is free to download, with no in-app purchases.

### Do 認知シャッフル睡眠法 or 脳でんち have ads?

Neither 認知シャッフル睡眠法 nor 脳でんち shows ads.

### Which is updated more often, 認知シャッフル睡眠法 or 脳でんち?

認知シャッフル睡眠法 ships an update every 6 weeks, and 脳でんち every 2 months. Most recently, 認知シャッフル睡眠法 was updated on November 5, 2026 and 脳でんち on October 31, 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.*