# SD Scan Tool vs CK Wear OS

The clearest difference is update cadence: CK Wear OS at every 10 days against SD Scan Tool's every 2 months. SD Scan Tool's advantage is iOS requirement (8.0 vs 13.0). 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.

SD Scan Tool ships an update every 2 months, CK Wear OS every 10 days. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | SD Scan Tool | CK Wear OS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Size | 3 MB | 188 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wetrusty](https://appshunter.io/developer/917655408) | [Shenzhen Aienmi Technology Co., Ltd.](https://appshunter.io/developer/1761782444) |

## What reviewers say

### SD Scan Tool

[App page](https://appshunter.io/ios/app/sd-scan-tool/id1259056999)

**Features:** macOS Compatibility

**In-app purchases:** none


### CK Wear OS

[App page](https://appshunter.io/ios/app/ck-wear-os/id6618142425)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SD Scan Tool free?

SD Scan Tool is free to download, with no in-app purchases.

### Is CK Wear OS free?

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

### Do SD Scan Tool or CK Wear OS have ads?

Neither SD Scan Tool nor CK Wear OS shows ads.

### Which is updated more often, SD Scan Tool or CK Wear OS?

SD Scan Tool ships an update every 2 months, and CK Wear OS every 10 days. Most recently, SD Scan Tool was updated on October 26, 2026 and CK Wear OS on October 27, 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.*