# 認知シャッフル睡眠 vs nighty

The clearest difference is update cadence: 認知シャッフル睡眠 at every 2 weeks against nighty's every 2 months. 認知シャッフル睡眠 also leads on iOS requirement (12.0 vs 26.0). 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.

認知シャッフル睡眠 ships an update every 2 weeks, nighty every 2 months. The most recent releases landed on November 4, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 認知シャッフル睡眠 | nighty |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/cognitive-shuffle/id6483436496/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 49 MB | 18 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Masao Sasaki](https://appshunter.io/developer/1651201873) | [kaneko koudai](https://appshunter.io/developer/912946051) |

## What reviewers say

### 認知シャッフル睡眠

[App page](https://appshunter.io/ios/app/cognitive-shuffle/id6483436496)

This app guides you to sleep using a cognitive shuffle method. It reads out random words, allowing you to focus your imagination and drift off to sleep. Customize voice, duration, and playback settings for a personalized experience.

**Highlights:** Randomized word recitation, Customizable voice (male/female), Adjustable playback duration (1-30 mins), Adjustable word recitation interval, Adjustable recitation speed, Adjustable volume control, Notification sounds are OFF

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

**In-app purchases:** none


### nighty

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

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

**In-app purchases:** none


## Frequently asked questions

### Is 認知シャッフル睡眠 free?

認知シャッフル睡眠 is free to download, with no in-app purchases.

### Is nighty free?

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

### Do 認知シャッフル睡眠 or nighty have ads?

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

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

認知シャッフル睡眠 ships an update every 2 weeks, and nighty every 2 months. Most recently, 認知シャッフル睡眠 was updated on November 4, 2026 and nighty on October 24, 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.*