# Shuffle Sleep vs 認知シャッフル睡眠

The clearest difference is ads: 認知シャッフル睡眠 at none against Shuffle Sleep's shown. 認知シャッフル睡眠 also leads on update cadence (every 2 weeks vs every 5 weeks) and iOS requirement (12.0 vs 15.6). Shuffle Sleep's advantage is ratings volume (4 vs 1). On price, rating, in-app purchases and monetization model there is nothing between them.

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

On the App Store both sit at effectively the same score — 3.0 for Shuffle Sleep against 3.0 for 認知シャッフル睡眠. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Shuffle Sleep ships an update every 5 weeks, 認知シャッフル睡眠 every 2 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Shuffle Sleep | 認知シャッフル睡眠 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (4 ratings)](https://appshunter.io/ios/app/shuffle-sleep-brain-shutdown/id1500187007/reviews) | [3.0 (1 ratings)](https://appshunter.io/ios/app/cognitive-shuffle/id6483436496/reviews) |
| Number of ratings | **4** | 1 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 4 MB | 49 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sollapps](https://appshunter.io/developer/1449408622) | [Masao Sasaki](https://appshunter.io/developer/1651201873) |

## What reviewers say

### Shuffle Sleep

[App page](https://appshunter.io/ios/app/shuffle-sleep-brain-shutdown/id1500187007)

This app uses a cognitive method to help you fall asleep faster by presenting a sequence of unrelated images. It features human narrations, customizable rhythms, and a sleep timer to aid your transition into rest.

**Highlights:** Cognitive shuffle method, Human narrations, Bi-lingual support (English/Japanese), Customizable rhythms, Sleep timer, Word management

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Shuffle Sleep free?

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

### 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.

### Which has better reviews, Shuffle Sleep or 認知シャッフル睡眠?

Shuffle Sleep and 認知シャッフル睡眠 are both rated 3.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do Shuffle Sleep or 認知シャッフル睡眠 have ads?

Shuffle Sleep shows ads; 認知シャッフル睡眠 does not.

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

Shuffle Sleep ships an update every 5 weeks, and 認知シャッフル睡眠 every 2 weeks. Most recently, Shuffle Sleep was updated on November 3, 2026 and 認知シャッフル睡眠 on November 4, 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.*