# HaWoFit vs Kstyle OS

The clearest difference is rating: HaWoFit at 4.3 against Kstyle OS's 3.6. HaWoFit also leads on ratings volume (55 vs 13) and iOS requirement (12 vs 15.6). Kstyle OS's advantage is update cadence (every 3 days vs every 4 weeks). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

HaWoFit holds the better App Store score, 4.3 against 3.6. Both are backed by a comparable volume of ratings — 55 and 13 respectively. Written reviews point the same way: 36% of HaWoFit's written reviews are positive against 29% of Kstyle OS's.

HaWoFit ships an update every 4 weeks, Kstyle OS every 3 days. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | HaWoFit | Kstyle OS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (55 ratings)](https://appshunter.io/ios/app/hawofit/id1561083814/reviews)** | [3.6 (13 ratings)](https://appshunter.io/ios/app/kstyle-os/id6503945039/reviews) |
| Number of ratings | **55** | 13 |
| Positive reviews | **36.2% of reviews** | 28.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 days** |
| Monetization | Free | Free |
| Size | 328 MB | 248 MB |
| Requires iOS | **12** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hongkong kingwear Intelligent Technology Company Limited](https://appshunter.io/developer/6775733263) | [上海凯斯领拓技术有限公司](https://appshunter.io/developer/1696907877) |

## What reviewers say

### HaWoFit

[App page](https://appshunter.io/ios/app/hawofit/id1561083814)

This app syncs with a smart watch to display heart rate and activity data. It allows users to set reminders and alarms, track exercise, and share health information. Users can also customize watch faces for a personalized experience.

**Highlights:** Syncs SMS and call data to smartwatch, Records and displays heart rate data, Tracks steps, stride, and distance, Set reminders and alarms, Exercise and sleep goal setting, Share exercise information, Customizable watch faces

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

**In-app purchases:** none

**What reviewers like**

- 👍 Neat and clean interface
- 👍 Good app, works perfectly
- 👍 Best and clean app
- 👍 App is good and smooth

**What reviewers complain about**

- 🐛 App crashes frequently
- 🐛 Connection issues
- 🐛 App not updated
- 🐛 Watch faces not updated
- 🐛 Data not saved

**Reported bugs**

- Application is over two years outdated
- Running data not saved
- Maps inaccurate
- Cannot update to new version
- Connection lost between watch and mobile

**Requested features**

- 💡 App update needed
- 💡 More classic watch faces
- 💡 More watch faces
- 💡 Digital watch faces
- 💡 Add AOD current watch face


### Kstyle OS

[App page](https://appshunter.io/ios/app/kstyle-os/id6503945039)

This companion app syncs with a specific smartwatch to display incoming calls and messages. It records and visualizes heart rate and motion data, and allows for smartwatch reminders and alarms. It's designed for general fitness tracking, not medical use.

**Highlights:** Incoming call and SMS/MMS push to smartwatch, Quick reply to rejected calls, Heart rate data recording and visualization, Motion data tracking (steps, distance), Smartwatch reminder and alarm settings, General fitness and health monitoring

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HaWoFit free?

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

### Is Kstyle OS free?

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

### Which has better reviews, HaWoFit or Kstyle OS?

HaWoFit is rated higher. HaWoFit averages 4.3 out of 5 from 55 ratings, while Kstyle OS averages 3.6 from 13 ratings.

### Do HaWoFit or Kstyle OS have ads?

Neither HaWoFit nor Kstyle OS shows ads.

### Which is updated more often, HaWoFit or Kstyle OS?

HaWoFit ships an update every 4 weeks, and Kstyle OS every 3 days. Most recently, HaWoFit was updated on October 22, 2026 and Kstyle OS on October 25, 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.*