Comparison

CO vs JR Smart

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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

About

JR Smart

This app connects to a Bluetooth bracelet to track and display your real-time health and fitness data, including heart rate, sleep, and exercise. It also offers device management features like reminders and factory resets.

Highlights
  • HealthKit integration
  • Real-time heart rate monitoring
  • Sleep tracking
  • Exercise recording
  • Bracelet reminders
  • Device search
  • Factory reset
Read full description

JR Smart app integrates HealthKit to read and write some data in the Health app.   JR Smart is mainly used to connect the Bluetooth bracelet to assist users. Record and display the user's exercise and health status in real time, including information such as heart rate, sleep and exercise. At the same time, it provides users with basic settings such as bracelet reminders, device search, and factory reset. 【Warm Prompt 】 Running track function will continue to use GPS positioning service, switch to the background can still keep running track record, compared to other operation consumes more electricity, will to a certain extent, affect the battery life. Note: Continued use of GPS running in the background can dramatically decrease 'life.

Screenshots

CO4 screens
JR Smart3 screens

Verdict

The call

The clearest difference is ads: JR Smart at none against CO's shown. JR Smart also leads on review sentiment (50% vs 27%) and monetization model (free vs ad-supported). CO's advantage is update cadence (fortnightly vs every 18 months) and ratings volume (1.2K vs 13). On price, rating, 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.5 for CO against 4.5 for JR Smart. That said, the two scores are not equally well evidenced: CO has 1.2K ratings behind it against 13, so its average is the more settled of the two. Written reviews are what separate them: 27% of CO's written reviews are positive against 50% of JR Smart's.

UpkeepUpdate frequency

CO ships an update fortnightly, JR Smart every 18 months. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.

Scorecard6 real differences · 4 level
CO versus JR Smart: the parameters behind the verdict, then further details
ParameterCOJR Smart
PriceFreeFree
Rating4.5 (1.2K ratings) — better4.5 (13 ratings)
Positive reviews27.2% of reviews50.0% of reviews — better
Number of ratings1.2K — better13
Update frequencyFortnightly — betterEvery 18 months
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPodiPhone, iPod
Requires iOS1412.0 — better
Further details — not scored
Size687 MB133 MB
Age rating12+4+
Developer深圳叩鼎科技有限责任公司Shenzhen Joyroom Technology Co., Ltd

Customer experience

CO

All ratings1,175 ratings
Positive87.8%
Neutral4.2%
Negative8.0%
Written reviews235 reviews
Positive27.2%
Neutral19.1%
Negative53.6%

JR Smart

All ratings9 ratings
Positive77.8%
Neutral11.1%
Negative11.1%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

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 more
  • 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 more
  • Improved notification handling
  • GPS functionality

JR Smart

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

CO

No in-app purchases

None

JR Smart

No in-app purchases

Questions

Is CO free?
CO is free to download, with no in-app purchases.
Is JR Smart free?
JR Smart is free to download, with no in-app purchases.
Which has better reviews, CO or JR Smart?
CO is rated higher. CO averages 4.5 out of 5 from 1.2K ratings, while JR Smart averages 4.5 from 13 ratings.
Do CO or JR Smart have ads?
CO shows ads; JR Smart does not.
Which is updated more often, CO or JR Smart?
CO ships an update fortnightly, and JR Smart every 18 months. Most recently, CO was updated on October 29, 2026 and JR Smart on October 21, 2026.

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