# Chief iWatch vs Circle O

The clearest difference is device support: Chief iWatch at 2 against Circle O's —. Chief iWatch also leads on iOS requirement (9.0 vs 12.0). On price 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.

## The numbers

| Metric | Chief iWatch | Circle O |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 6 weeks | — |
| Size | 80 MB | 229 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | **iPhone, iPod** | — |
| Age rating | 12+ | 4+ |
| Developer | [是方電訊股份有限公司](https://appshunter.io/developer/719288276) | [Trisonx INC.](https://appshunter.io/developer/1764041219) |

## What reviewers say

### Chief iWatch

[App page](https://appshunter.io/ios/app/chief-iwatch/id1617973738)

**Features:** macOS Compatibility

**In-app purchases:** none


### Circle O

[App page](https://appshunter.io/ios/app/circle-o/id6651850026)

**In-app purchases:** none


## Frequently asked questions

### Is Chief iWatch free?

Chief iWatch is free to download, with no in-app purchases.

### Is Circle O free?

Circle O is free to download, with no in-app purchases.

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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.*