# 수면지킴이(Sleep Keeper) vs 세라젬 마인드핏

The clearest difference is update cadence: 수면지킴이(Sleep Keeper) at fortnightly against 세라젬 마인드핏's every 3 months. 수면지킴이(Sleep Keeper) also leads on iOS requirement (11.0 vs 14.0). 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.

수면지킴이(Sleep Keeper) ships an update fortnightly, 세라젬 마인드핏 every 3 months. The most recent releases landed on October 27, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | 수면지킴이(Sleep Keeper) | 세라젬 마인드핏 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Size | 142 MB | 56 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Swing2App Co. Ltd.](https://appshunter.io/developer/573223450) | [YBRAIN Inc.](https://appshunter.io/developer/1164027531) |

## What reviewers say

### 수면지킴이(Sleep Keeper)

[App page](https://appshunter.io/ios/app/sleep-keeper/id6448084250)

**Features:** macOS Compatibility

**In-app purchases:** none


### 세라젬 마인드핏

[App page](https://appshunter.io/ios/app/id6450763891)

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

**In-app purchases:** none


## Frequently asked questions

### Is 수면지킴이(Sleep Keeper) free?

수면지킴이(Sleep Keeper) is free to download, with no in-app purchases.

### Is 세라젬 마인드핏 free?

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

### Do 수면지킴이(Sleep Keeper) or 세라젬 마인드핏 have ads?

Neither 수면지킴이(Sleep Keeper) nor 세라젬 마인드핏 shows ads.

### Which is updated more often, 수면지킴이(Sleep Keeper) or 세라젬 마인드핏?

수면지킴이(Sleep Keeper) ships an update fortnightly, and 세라젬 마인드핏 every 3 months. Most recently, 수면지킴이(Sleep Keeper) was updated on October 27, 2026 and 세라젬 마인드핏 on October 16, 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.*