# 잘자, 수면에 특화된 음악 및 가이드 앱 vs while you were sleeping

The clearest difference is in-app purchases: while you were sleeping at none against 잘자, 수면에 특화된 음악 및 가이드 앱's 4. 잘자, 수면에 특화된 음악 및 가이드 앱's advantage is device support and iOS requirement (13.0 vs 17.0). On price there is nothing between them.

Both are free to download. 잘자, 수면에 특화된 음악 및 가이드 앱 sells 4 in-app purchases, starting at $2.99 per month. while you were sleeping asks for nothing beyond the download.

## The numbers

| Metric | 잘자, 수면에 특화된 음악 및 가이드 앱 | while you were sleeping |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 2 months | — |
| Size | 56 MB | 278 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Sound Platform Co., Ltd.](https://appshunter.io/developer/1601753261) | [(주)허니냅스 (Honeynaps Co., Ltd.)](https://appshunter.io/developer/1192105907) |

## What reviewers say

### 잘자, 수면에 특화된 음악 및 가이드 앱

[App page](https://appshunter.io/ios/app/id6446684455)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Membership | $2.99 | per month |
| Yearly Premium Membership | $22.99 | per year |
| Zalza 7 days Ticket | $0.99 | one-time |
| Zalza 30 days Ticket | $1.99 | one-time |


### while you were sleeping

[App page](https://appshunter.io/ios/app/while-you-were-sleeping-stud/id6476932076)

**In-app purchases:** none


## Frequently asked questions

### Is 잘자, 수면에 특화된 음악 및 가이드 앱 free?

잘자, 수면에 특화된 음악 및 가이드 앱 is free to download, with in-app purchases available.

### Is while you were sleeping free?

while you were sleeping is free to download, with no in-app purchases.

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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.*