# KS OS vs CK OS

The clearest difference is rating: CK OS at 5.0 against KS OS's 3.3. KS OS's advantage is ratings volume (50 vs 1). 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.

CK OS holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: KS OS has 50 ratings behind it against 1, so its average is the more settled of the two.

KS OS ships an update every 4 weeks, CK OS fortnightly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | KS OS | CK OS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (50 ratings)](https://appshunter.io/ios/app/ks-os/id6451134361/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ck-os/id6667112670/reviews)** |
| Number of ratings | **50** | 1 |
| Positive reviews | 17.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | Free | Free |
| Size | 198 MB | 255 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [上海凯斯领拓技术有限公司](https://appshunter.io/developer/1696907877) | [Shenzhen Aienmi Technology Co., Ltd.](https://appshunter.io/developer/1761782444) |

## What reviewers say

### KS OS

[App page](https://appshunter.io/ios/app/ks-os/id6451134361)

This app acts as your personal health steward, integrating health data, movement tracking, and wearable device control. Monitor sleep, record exercise, manage daily reminders, and customize your device's appearance. Share achievements and sync data with Apple Health.

**Highlights:** Health data recording, Movement track recording, Wearable device control, Sleep quality monitoring, Exercise and activity tracking, Customizable watch faces, Achievement sharing

**Features:** macOS Compatibility

**In-app purchases:** none


### CK OS

[App page](https://appshunter.io/ios/app/ck-os/id6667112670)

Track your workouts with personalized plans and real-time data analysis. Monitor your health with heart rate and sleep tracking, and sync with other health platforms. Achieve your fitness goals with this comprehensive exercise companion.

**Highlights:** Multiple exercise modes, Real-time data tracking, Personalized training plans, Health monitoring, Data synchronization with Apple Health

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KS OS free?

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

### Is CK OS free?

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

### Which has better reviews, KS OS or CK OS?

CK OS is rated higher. KS OS averages 3.3 out of 5 from 50 ratings, while CK OS averages 5.0 from 1 ratings.

### Do KS OS or CK OS have ads?

Neither KS OS nor CK OS shows ads.

### Which is updated more often, KS OS or CK OS?

KS OS ships an update every 4 weeks, and CK OS fortnightly. Most recently, KS OS was updated on November 3, 2026 and CK OS on October 30, 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.*