Remax Fit vs Kstyle OS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Remax Fit
Connect your Bluetooth bracelet to monitor real-time health data like heart rate and sleep. Track your exercise progress and manage device settings, including reminders and searches. The app integrates with HealthKit for seamless data syncing.
- HealthKit integration
- Real-time heart rate monitoring
- Sleep tracking
- Exercise status display
- Bracelet reminders
- Device search
- Factory reset
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Remax Fit app integrates HealthKit to read and write some data in the Health app. Remax Fit 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.
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 review sentiment: Remax Fit at 100% against Kstyle OS's 27%. Remax Fit also leads on rating (4.7 vs 3.5) and ratings volume (51 vs 15). Kstyle OS's advantage is update cadence (every 3 days vs every 6 weeks). On price, ads, in-app purchases and monetization model 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.
Remax Fit holds the better App Store score, 4.7 against 3.5. Both are backed by a comparable volume of ratings — 51 and 15 respectively. Written reviews point the same way: 100% of Remax Fit's written reviews are positive against 27% of Kstyle OS's.
Remax Fit ships an update every 6 weeks, Kstyle OS every 3 days. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.
| Parameter | Remax Fit | Kstyle OS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (51 ratings) — better | 3.5 (15 ratings) |
| Positive reviews | 100.0% of reviews — better | 26.7% of reviews |
| Number of ratings | 51 — better | 15 |
| Update frequency | Every 6 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 121 MB | 251 MB |
| Age rating | 12+ | 4+ |
| Developer | 腾飞 王 | 上海凯斯领拓技术有限公司 |
Customer experience
Remax Fit
Kstyle OS
In-app purchases
Remax Fit
No in-app purchases
Kstyle OS
No in-app purchases









