KS OS vs JR Smart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KS OS
This app acts as your personal health steward, integrating health data, movement tracking, and wearable device control. Monitor sleep, record exercise, manage daily reminders, and customize your device's appearance. Share achievements and sync data with Apple Health.
- Health data recording
- Movement track recording
- Wearable device control
- Sleep quality monitoring
- Exercise and activity tracking
- Customizable watch faces
- Achievement sharing
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KS OS is sports and health App with new features. - It integrates such functions as health data recording, movement track recording and wearable device control, acting as your exclusive health steward. -It records all data from your wearable device, allowing you to focus more on your exercise! After connecting your wearable device to the KS OS App, you have access to: [Manage Health]: Set alarms, call reminders, message notifications, inactivity reminders, drinking reminders, serving as an assistant in your life; Record your sleep data, including sleep duration, deep sleep, light sleep and rapid eye movements (REM), in order to monitor and improve your sleep quality; Record your weight trends and set your weight goal, encouraging you to achieve the daily exercise goal; [Record Exercise& Activities]: Record your exercise data sports (running, biking, swimming, rowing machine, etc.), including your movement track, pace, etc.; Record your daily walking steps, calories, medium and high-intensity exercise and other activity data, and view the complete records on a daily/weekly/monthly basis; [Change Dial]: A rich selection of watch face themes are available in the brand-new cloud dial market, giving your device a new look every day; [Share Achievements]: If you use KS OS App to monitor your excercises continuously, virtual medals will be awarded when you reaches milestones. You can share your weekly exercise information for interaction with your friends. [Data Share]: Connect to synchronize data to Apple Health (HealthKit), to achieve data movement, data and consumed calories sleep simultaneous recording to Apple Health (HealthKit) KS OS App supports multiple languages, and it will support more wearable devices in the future, bringing you more wonderful experiences! You are welcome to send you feedback to: service@kieslect.com
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.
- HealthKit integration
- Real-time heart rate monitoring
- Sleep tracking
- Exercise recording
- Bracelet reminders
- Device search
- Factory reset
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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
Verdict
The clearest difference is rating: JR Smart at 4.5 against KS OS's 3.3. JR Smart also leads on review sentiment (50% vs 18%). KS OS's advantage is update cadence (every 4 weeks vs every 18 months) and ratings volume (50 vs 13). 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.
JR Smart holds the better App Store score, 4.5 against 3.3. Both are backed by a comparable volume of ratings — 50 and 13 respectively. Written reviews point the same way: 18% of KS OS's written reviews are positive against 50% of JR Smart's.
KS OS ships an update every 4 weeks, JR Smart every 18 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | KS OS | JR Smart |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (50 ratings) | 4.5 (13 ratings) — better |
| Positive reviews | 17.9% of reviews | 50.0% of reviews — better |
| Number of ratings | 50 — better | 13 |
| Update frequency | Every 4 weeks — better | Every 18 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 198 MB | 133 MB |
| Age rating | 4+ | 4+ |
| Developer | 上海凯斯领拓技术有限公司 | Shenzhen Joyroom Technology Co., Ltd |
Customer experience
KS OS
JR Smart
In-app purchases
KS OS
No in-app purchases
JR Smart
No in-app purchases








