HaWoFit vs Kstyle OS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HaWoFit
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.
- 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
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HaWoFit app is a supporting application for smart watches. Main function: 1. This app is a supporting application of the smart watch, and will use related permissions such as SMS and phone calls. After the user agrees, it will send the monitored SMS and phone-related information to the smart watch through Bluetooth, bringing convenience to the user. experience 2. Record the heart rate data collected by the smart watch, and display it in the form of a line graph and a histogram according to the heart rate data; 3. Record the sports data collected by the smart watch, including the number of steps, stride frequency and distance, and display them in the form of line graphs and histograms; 4. Set reminders and alarms for your smart watch. App Features: 1. Detailed data help you exercise more rationally and scientifically; 2. Exercise and sleep goals encourage yourself to exercise every day and live a healthy life; 3. Support the sharing of healthy exercise information; 4. Massive dials and custom dials, interesting and individual. 【HealthKit】 - Synchronize with motion data in healthkit.You can automatically synchronize the exercise data recorded in HaWoFit to healthkit. 【Contact us】 - Company name: Huawo Wear Technology Co.,Ltd, - Official website: https://www.huawo-wear.com/ - Contact email: limingxing@huawo-wear.com 【Warm tips】 - The HaWoFit application supports only iOS 12.0 or later. - HaWoFit must be used together with HaWoFit smart watch. The application alone cannot play all its functions This app is a health and fitness application and is not a medical device. All health-related data is for reference only and does not constitute medical advice, diagnosis, or treatment.
Kstyle OS
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.
- 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
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The Kstyle OS APP is a companion application of the "Kieslect" smartwatch, with the following functions: One of the main functions of the APP is to push incoming calls and SMS/MMS received by the phone to the associated smartwatch, so that you can answer and view SMS/MMS on the watch end; When the watch terminal rejects a call, it can quickly reply, and the APP will send a pre configured SMS to the caller. It should be noted that the application will request "SMS and call record permissions" to implement these functions, and without these permissions, the application will not be able to use them. 2. Record the step data collected by the smartwatch, including step count, step frequency, and distance, and display them in the form of line charts and bar charts; 3. Set reminders and alarms for your smartwatch. 4. Not for medical use, only for general fitness/health purposes Disclaimer: This application aims to assist users in managing and monitoring health data, supporting a healthy lifestyle. However, this application is for general health reference only and cannot replace professional medical advice. Before using this application or making any medical decisions, please be sure to consult a professional doctor. We do not assume responsibility for any health issues arising from reliance on the information provided by this application.
Screenshots
Verdict
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.
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.
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.
| Parameter | HaWoFit | Kstyle OS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (55 ratings) — better | 3.6 (13 ratings) |
| Positive reviews | 36.2% of reviews — better | 28.6% of reviews |
| Number of ratings | 55 — better | 13 |
| Update frequency | Every 4 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12 — better | 15.6 |
| Further details — not scored | ||
| Size | 328 MB | 248 MB |
| Age rating | 4+ | 4+ |
| Developer | Hongkong kingwear Intelligent Technology Company Limited | 上海凯斯领拓技术有限公司 |
Customer experience
HaWoFit
Kstyle OS
Bugs and requests
HaWoFit
Reported bugs
23 issues- Application is over two years outdated
- Running data not saved
- Maps inaccurate
- Cannot update to new version
- Connection lost between watch and mobile
Show 18 moreShow fewer
- Cannot change faces
- Losses sync frequently
- Raise to wake not working
- App crashes when raise to wake is enabled
- Connection quality is very poor
- Frequent disconnections
- Network unavailable problem
- Network error
- Cannot log in to app
- App crashes when trying to download more dials
- Theme selection closes suddenly
- App does not run in background
- Steps are not counting
- Contact name not showing on incoming calls
- Unable to update firmware
- App crashes a lot
- App closes when clicking update app
- App closes when clicking watch icon in device tab
Requested features
9 requests- 💡 App update needed
- 💡 More classic watch faces
- 💡 More watch faces
- 💡 Digital watch faces
- 💡 Add AOD current watch face
Show 4 moreShow fewer
- 💡 Live wallpaper option
- 💡 Connect to Strava
- 💡 Double tap to wake feature
- 💡 Black to white background option
Kstyle OS
Not enough reviews yet to summarise bugs or requests.
In-app purchases
HaWoFit
No in-app purchases
Kstyle OS
No in-app purchases









