# 認知シャッフル睡眠 vs Corelax

The clearest difference is in-app purchases: Corelax at none against 認知シャッフル睡眠's 3. Corelax also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. 認知シャッフル睡眠 sells 3 one-off in-app purchases. Corelax asks for nothing beyond the download.

認知シャッフル睡眠 ships an update fortnightly, Corelax every 10 days. The most recent releases landed on August 31, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 認知シャッフル睡眠 | Corelax |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6462812706/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | Free | — |
| Size | 73 MB | 83 MB |
| Requires iOS | 16.1 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Tsubasa Takahashi](https://appshunter.io/developer/1600061125) | [DUNKIT K.K.](https://appshunter.io/developer/1780948183) |

## What reviewers say

### 認知シャッフル睡眠

[App page](https://appshunter.io/ios/app/id6462812706)

This unofficial healthcare app uses a unique method to help you fall asleep faster. By listening to a series of random words and imagining them, you can suppress distracting thoughts and relax into sleep. Customize voice, playback time, and intervals for a personalized sleep experience.

**Highlights:** Background audio playback, Multiple voice options, Customizable playback duration, Adjustable audio intervals, Random word imagery technique

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 四国めたんパック | $1.99 | one-time |
| 中国うさぎパック | $1.99 | one-time |
| 九州そらパック | $1.99 | one-time |


### Corelax

[App page](https://appshunter.io/ios/app/corelax/id6752983129)

**Features:** macOS Compatibility, Apple Wallet, 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 in-app purchases available.

### Is Corelax free?

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

### Do 認知シャッフル睡眠 or Corelax have ads?

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

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

認知シャッフル睡眠 ships an update fortnightly, and Corelax every 10 days. Most recently, 認知シャッフル睡眠 was updated on August 31, 2026 and Corelax on September 9, 2026.

---

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