# 쪽잠 Pro vs 온숨 Onsum

The clearest difference is update cadence: 쪽잠 Pro at every 3 weeks against 온숨 Onsum's every 6 weeks. 온숨 Onsum's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

쪽잠 Pro ships an update every 3 weeks, 온숨 Onsum every 6 weeks. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | 쪽잠 Pro | 온숨 Onsum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (4 ratings)](https://appshunter.io/ios/app/pro/id6767180257/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Free | — |
| Size | 9 MB | 28 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yechan Gu](https://appshunter.io/developer/1879393081) | [Minwoo Ryu](https://appshunter.io/developer/6775730330) |

## What reviewers say

### 쪽잠 Pro

[App page](https://appshunter.io/ios/app/pro/id6767180257)

This app provides a quiet nap timer for short rests, allowing custom duration settings. It plays alarms only through earphones for discreet use in quiet environments and displays remaining time on the lock screen and Dynamic Island.

**Highlights:** Custom nap time setting, Quick selection for common durations, Earphone-only alarm playback, Lock screen and Dynamic Island display, Adjustable system volume within the app, 5-minute interval repeat alarm

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

**In-app purchases:** none


### 온숨 Onsum

[App page](https://appshunter.io/ios/app/onsum/id6786813143)

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

**In-app purchases:** none


## Frequently asked questions

### Is 쪽잠 Pro free?

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

### Is 온숨 Onsum free?

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

### Do 쪽잠 Pro or 온숨 Onsum have ads?

Neither 쪽잠 Pro nor 온숨 Onsum shows ads.

### Which is updated more often, 쪽잠 Pro or 온숨 Onsum?

쪽잠 Pro ships an update every 3 weeks, and 온숨 Onsum every 6 weeks. Most recently, 쪽잠 Pro was updated on October 12, 2026 and 온숨 Onsum on October 15, 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.*