CO vs Vfit
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
Vfit
Track your fitness and sleep with real-time motion data and trend graphs. Set personalized reminders and sync your activity data with Apple Health for a comprehensive overview of your well-being.
- Real-time motion data tracking
- Weekly/monthly motion trend graphs
- Sleep data detection and analysis
- Personalized bracelet settings (alerts, reminders)
- Activity recording (riding, running)
- Apple Health data synchronization
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The main function: - Measure and record motion data in real time, and provide weekly or monthly motion trend graphs to make the movement situation clear at a glance; - Detect sleep data, record the length of deep sleep, shallow sleep time, help users understand their sleep in real time; - set the bracelet after connecting the bracelet, you can carry out a number of personalized settings such as call alert, smart alarm, sedentary reminder, step number, etc., to provide more convenience for the user's life; - record your riding, running, etc., visualize the results of the data, let you know your own movements; - you can connect the synchronization data to Apple Health, to achieve data movement, the user's steps, calories, distance, heart rate and other data will be synchronized; Note: - Support [health] application, you can synchronize the number of steps, calories and distance to the [health] application after authorization. - Continuous running GPS in the background may reduce your battery life
Screenshots
Verdict
The clearest difference is rating: CO at 4.5 against Vfit's 2.6. CO also leads on ratings volume (1.2K vs 40) and review sentiment (27% vs 13%). Vfit's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases and device support 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 40, 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 Vfit's.
CO ships an update fortnightly, Vfit every 5 weeks. The most recent releases landed on November 11, 2026 and November 5, 2026 respectively.
| Parameter | CO | Vfit |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (1.2K ratings) — better | 2.6 (40 ratings) |
| Positive reviews | 26.9% of reviews — better | 13.0% of reviews |
| Number of ratings | 1.2K — better | 40 |
| Update frequency | Fortnightly — better | Every 5 weeks |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 14 | 12.0 — better |
| Further details — not scored | ||
| Size | 702 MB | 227 MB |
| Age rating | 12+ | 4+ |
| Developer | 深圳叩鼎科技有限责任公司 | Shenzhen Weir Health Technology Co., Ltd |
Customer experience
CO
Vfit
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
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- 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
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- Improved notification handling
- GPS functionality
Vfit
Not enough reviews yet to summarise bugs or requests.
In-app purchases
CO
No in-app purchases
Vfit
No in-app purchases









