# nighty vs 認知シャッフル睡眠法

The clearest difference is in-app purchases: nighty at none against 認知シャッフル睡眠法's 2. 認知シャッフル睡眠法's advantage is iOS requirement (15.1 vs 26.0). 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. nighty asks for nothing beyond the download.

nighty ships an update every 2 months, 認知シャッフル睡眠法 every 6 weeks. Both last shipped on November 5, 2026.

## The numbers

| Metric | nighty | 認知シャッフル睡眠法 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Size | 18 MB | 136 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [kaneko koudai](https://appshunter.io/developer/912946051) | [mika kubo](https://appshunter.io/developer/1877061175) |

## What reviewers say

### nighty

[App page](https://appshunter.io/ios/app/nighty/id6752117167)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is nighty free?

nighty is free to download, with no in-app purchases.

### 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.

### Do nighty or 認知シャッフル睡眠法 have ads?

Neither nighty nor 認知シャッフル睡眠法 shows ads.

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

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