# CO vs ZERO LIFESTYLE

The clearest difference is rating: CO at 4.5 against ZERO LIFESTYLE's 2.0. CO also leads on review sentiment (27% vs 0%) and ratings volume (1.2K vs 3). ZERO LIFESTYLE'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.

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 2.0. That said, the two scores are not equally well evidenced: CO has 1.2K ratings behind it against 3, 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 0% of ZERO LIFESTYLE's.

CO ships an update fortnightly, ZERO LIFESTYLE every 3 months. The most recent releases landed on September 24, 2026 and July 8, 2026 respectively.

## The numbers

| Metric | CO | ZERO LIFESTYLE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (1.2K ratings)](https://appshunter.io/ios/app/co-fit/id1514529526/reviews)** | [2.0 (3 ratings)](https://appshunter.io/ios/app/zero-lifestyle/id1663781476/reviews) |
| Number of ratings | **1.2K** | 3 |
| Positive reviews | **27.2% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Ad-supported | **Free** |
| Size | 687 MB | 91 MB |
| Requires iOS | 14 | **10.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [深圳叩鼎科技有限责任公司](https://appshunter.io/developer/1514529525) | [腾飞 王](https://appshunter.io/developer/1445983614) |

## 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


### ZERO LIFESTYLE

[App page](https://appshunter.io/ios/app/zero-lifestyle/id1663781476)

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

**Highlights:** HealthKit integration, Bluetooth bracelet connection, Real-time heart rate monitoring, Sleep tracking, Exercise recording, Bracelet reminders, Device search

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CO free?

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

### Is ZERO LIFESTYLE free?

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

### Which has better reviews, CO or ZERO LIFESTYLE?

CO is rated higher. CO averages 4.5 out of 5 from 1.2K ratings, while ZERO LIFESTYLE averages 2.0 from 3 ratings.

### Do CO or ZERO LIFESTYLE have ads?

CO shows ads; ZERO LIFESTYLE does not.

### Which is updated more often, CO or ZERO LIFESTYLE?

CO ships an update fortnightly, and ZERO LIFESTYLE every 3 months. Most recently, CO was updated on September 24, 2026 and ZERO LIFESTYLE on July 8, 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.*