CO vs UtraWatch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CO
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.
- 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
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CO FIT is a newly designed and developed app for our new smartwatch collection only. main feature: Sync your steps, calories, mileage, heart rate, sleep and exercise records from your watch. The newly designed UI can display data more intuitively. After binding and authorization, we will push the phone's incoming calls and text messages to the watch to avoid losing information. You can use the app to configure the watch's sedentary alarms, alarms, schedules, backlighting, as well as sync weather and AGPS files (to help the watch locate) and other features for better use of the watch. During use, if you have any questions, you can ask at any time, we will listen to your suggestions and make improvements. Disclaimer: 1. The data displayed by the app is provided by the device, and the app only records and shares 2. All health data displayed in the app are not suitable for medical use, all health data are for reference only, these data should not be used as a substitute for the opinions of health care professionals For accurate data, consult your doctor. Authorization Instructions 1. We will access iPhone Health, sync device data to iPhone Health in real time 2. We will access the mobile phone location to obtain local weather information and synchronize it to the device display
UtraWatch
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.
- 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
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Using our smartwatch and its accompanying UtraWatch app enables you to: ● You can use all features of the app without registering and logging in, and your stored data will be cleared when you decide to leave. ● The app automatically synchronizes the phone system time, language and local weather information to the watch ● The watch automatically syncs data to the app and displays graphs by day, week, and month, including: ○ Daily total steps, duration, distance and calories burned ○ Sports records ○ Last measured heart rate, body temperature, blood oxygen and blood pressure ○ Sleep data from the previous night ● Set up the watch's time system, watch face, alarm clocks, phone book, emergency contact, do not disturb, and turning on the watch screen when raising the wrist ● Set up notifications for SMS, incoming calls and app messages ● Set up drinking reminder, sedentary reminder, daily goals (sleep duration, exercise duration, exercise distance, steps, calories burned) and goal achievement reminder ● Set up timed measurement of heart rate and body temperature ● Measure heart rate, body temperature, blood oxygen and blood pressure with one click ● Play sports involving map and positioning tracks, including walking, running, cycling, and trekking (Continued location updates in the background may reduce phone battery life) ● Supports for synchronizing a user's exercise data to the Health app. With the user's permission, UtraWatch synchronizes the generated or acquired exercise data such as steps, distance and calories to the Health app ● Other features, such as updating watch firmware, finding the watch
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 August 18, 2026 respectively.
| Parameter | CO | UtraWatch |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (1.2K ratings) — better | 2.6 (221 ratings) |
| Positive reviews | 27.2% of reviews — better | 12.9% of reviews |
| Number of ratings | 1.2K — better | 221 |
| Update frequency | Fortnightly — better | Every 6 weeks |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 14 | 12.0 — better |
| Further details — not scored | ||
| Size | 687 MB | 176 MB |
| Age rating | 12+ | 4+ |
| Developer | 深圳叩鼎科技有限责任公司 | 平萍 毕 |
Customer experience
CO
UtraWatch
User reviews
CO
From 1.2K App Store ratingsWhat we love
- 👍 Easy to connect
- 🤩 Great watch and app experience
- 🤩 Awesome watch
- 👍 Good for the price
- 👍 Looks good
Room to improve
- 🐛 Bluetooth connection issues
- 🐛 App crashes and freezes
- 🐛 Inaccurate measurements
- 🐛 Notifications not working
- 🐛 Firmware issues after updates
UtraWatch
From 221 App Store ratingsWhat we love
- ✅ Bluetooth connection fixed in recent updates
- 👍 Good fitness tracker appearance
- 🎨 Customizable wallpaper options
- 💪 Durable design suitable for showers
Room to improve
- 🐛 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
Bugs and requests
CO
Reported bugs
7 issues- Time setting not working
- Watch disconnecting frequently
- Inaccurate step and distance tracking
- Inability to change weight in user profile
- Firmware update bricking the watch
Show 2 moreShow fewer
- Syncing issues with iPhone
- Bluetooth not connecting properly
Requested features
7 requests- More watch face designs
- Customization options for watch faces
- Integration with Apple Health
- Ability to remove unwanted features
- Better language support
Show 2 moreShow fewer
- Improved notification handling
- GPS functionality
UtraWatch
Reported bugs
12 issues- 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
Show 7 moreShow fewer
- App logs off automatically
- Watch resets to default settings
- Incompatibility with iPhone 13, iPhone 16, iPhone XR
- Password reset functionality unavailable
- Watch face customization not accessible
- Inaccurate step counter adding thousands of steps
- App crashes on every launch
Requested features
7 requests- 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
Show 2 moreShow fewer
- Activity rings feature
- Better app marketplace for watch faces
In-app purchases
CO
No in-app purchases
UtraWatch
No in-app purchases






