# 수면지킴이(Sleep Keeper) vs Dr. Calcium

The clearest difference is iOS requirement: 수면지킴이(Sleep Keeper) at 11.0 against Dr. Calcium's 15.0. On price, update cadence, 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.

수면지킴이(Sleep Keeper) ships an update fortnightly, Dr. Calcium every 9 days. The most recent releases landed on October 27, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 수면지킴이(Sleep Keeper) | Dr. Calcium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dr-calcium/id6761144466/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 9 days** |
| Monetization | — | Free |
| Size | 142 MB | 24 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Swing2App Co. Ltd.](https://appshunter.io/developer/573223450) | [True Nutrition Company](https://appshunter.io/developer/1888016648) |

## What reviewers say

### 수면지킴이(Sleep Keeper)

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Dr. Calcium

[App page](https://appshunter.io/ios/app/dr-calcium/id6761144466)

This health and wellness app helps you organize personal health data, track nutrition, and access educational resources. It includes tools for logging meals, monitoring health indicators, and storing medical test results.

**Highlights:** Food Diary, Health Score Tracking, Blood Test Log, Bone Density Log, BMI Calculator, Vitamin D Tools, AI Health Assistant

**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 Dr. Calcium free?

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

### Do 수면지킴이(Sleep Keeper) or Dr. Calcium have ads?

Neither 수면지킴이(Sleep Keeper) nor Dr. Calcium shows ads.

### Which is updated more often, 수면지킴이(Sleep Keeper) or Dr. Calcium?

수면지킴이(Sleep Keeper) ships an update fortnightly, and Dr. Calcium every 9 days. Most recently, 수면지킴이(Sleep Keeper) was updated on October 27, 2026 and Dr. Calcium on October 13, 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.*