# CO vs UtraWatch

The clearest difference is rating: CO at 4.5 against UtraWatch's 2.6. CO also leads on update cadence (fortnightly vs every 6 weeks) and review sentiment (27% vs 13%). UtraWatch's advantage is iOS requirement (12.0 vs 14). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CO holds the better App Store score, 4.5 against 2.6. That said, the two scores are not equally well evidenced: CO has 1.2K ratings behind it against 221, so its average is the more settled of the two. Written reviews point the same way: 27% of CO's written reviews are positive against 13% of UtraWatch's.

CO ships an update fortnightly, UtraWatch every 6 weeks. The most recent releases landed on September 24, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | CO | UtraWatch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (1.2K ratings)](https://appshunter.io/ios/app/co-fit/id1514529526/reviews)** | [2.6 (221 ratings)](https://appshunter.io/ios/app/utrawatch/id6443502090/reviews) |
| Number of ratings | **1.2K** | 221 |
| Positive reviews | **27.2% of reviews** | 12.9% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | Ad-supported | Ad-supported |
| Size | 687 MB | 176 MB |
| Requires iOS | 14 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [深圳叩鼎科技有限责任公司](https://appshunter.io/developer/1514529525) | [平萍 毕](https://appshunter.io/developer/1637783377) |

## What reviewers say

### CO

[App page](https://appshunter.io/ios/app/co-fit/id1514529526)

This app syncs data from a smartwatch, including steps, heart rate, and sleep. It also pushes phone notifications to the watch and allows for watch configuration like alarms and weather updates. Health data is for reference only and not for medical use.

**Highlights:** Sync steps, calories, heart rate, sleep, and exercise, Display data intuitively with a new UI, Push phone calls and text messages to the watch, Configure watch alarms, schedules, and backlighting, Sync weather and AGPS files for watch location, Access iPhone Health for real-time data sync

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to connect
- 🤩 Great watch and app experience
- 🤩 Awesome watch
- 👍 Good for the price
- 👍 Looks good

**What reviewers complain about**

- 🐛 Bluetooth connection issues
- 🐛 App crashes and freezes
- 🐛 Inaccurate measurements
- 🐛 Notifications not working
- 🐛 Firmware issues after updates

**Reported bugs**

- Time setting not working
- Watch disconnecting frequently
- Inaccurate step and distance tracking
- Inability to change weight in user profile
- Firmware update bricking the watch

**Requested features**

- More watch face designs
- Customization options for watch faces
- Integration with Apple Health
- Ability to remove unwanted features
- Better language support


### UtraWatch

[App page](https://appshunter.io/ios/app/utrawatch/id6443502090)

This app syncs with a smartwatch to display health and fitness data. It tracks daily activity, sports, vital signs, and sleep. Users can customize watch settings, receive reminders, and set fitness goals.

**Highlights:** Automatic data synchronization, Daily, weekly, monthly activity graphs, Vital sign tracking (heart rate, temp, SpO2, BP), Sleep data analysis, Watch face and settings customization, Notification management, Sports tracking with GPS

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- ✅ Bluetooth connection fixed in recent updates
- 👍 Good fitness tracker appearance
- 🎨 Customizable wallpaper options
- 💪 Durable design suitable for showers

**What reviewers complain about**

- 🐛 App crashes frequently when changing pictures
- 🔌 Connection issues between app and watch
- ❌ App doesn't work after latest updates
- 🚫 Limited functionality compared to real Apple Watch
- 📵 Cannot send/receive text messages or calls

**Reported bugs**

- App crashes when attempting to change watch photo
- Bluetooth timeout and disconnection issues
- App won't open after updates
- Watch fails to connect to phone
- Registration and login failures

**Requested features**

- Add hands/time display option for custom wallpapers
- Support for downloading third-party apps
- Integration with messaging and calling features
- More watch face options and designs
- Weather and sleep tracking functionality


## Frequently asked questions

### Is CO free?

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

### Is UtraWatch free?

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

### Which has better reviews, CO or UtraWatch?

CO is rated higher. CO averages 4.5 out of 5 from 1.2K ratings, while UtraWatch averages 2.6 from 221 ratings.

### Do CO or UtraWatch have ads?

Both CO and UtraWatch show ads.

### Which is updated more often, CO or UtraWatch?

CO ships an update fortnightly, and UtraWatch every 6 weeks. Most recently, CO was updated on September 24, 2026 and UtraWatch on September 26, 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.*