Comparison

KS OS vs CK OS

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Health data recording
  • Movement track recording
  • Wearable device control
  • Sleep quality monitoring
  • Exercise and activity tracking
  • Customizable watch faces
  • Achievement sharing
Features
Read full description

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

About

CK OS

Track your workouts with personalized plans and real-time data analysis. Monitor your health with heart rate and sleep tracking, and sync with other health platforms. Achieve your fitness goals with this comprehensive exercise companion.

Highlights
  • Multiple exercise modes
  • Real-time data tracking
  • Personalized training plans
  • Health monitoring
  • Data synchronization with Apple Health
Features
Read full description

CK OS is a comprehensive and intelligent exercise tracking application designed to help you achieve your fitness goals and maintain a healthy lifestyle. Whether you are a beginner or a seasoned athlete,CK OS can provide you with personalized training plans and real-time sports data analysis. Main functions: Multiple exercise modes: Supports running, cycling, swimming, strength training, yoga, and other exercise modes to meet your different exercise needs. Real time data tracking: Accurately track your movement trajectory through GPS, and record key data such as steps, distance, speed, calorie consumption, etc. in real time. Personalized training plan: Based on your physical fitness level and goals, intelligently generate daily training plans to help you gradually improve. Health monitoring: Integrated heart rate monitoring and sleep analysis functions to comprehensively understand your physical condition. Data synchronization: seamlessly synchronize with platforms such as Apple Health to ensure that your health data is managed in one place. intended for: CK OS is suitable for all people who pursue health and exercise. Whether you want to lose weight and shape up, or improve your athletic performance, CK Fit OS can be your ideal partner, helping you move towards a healthier life.

Screenshots

KS OS4 screens
CK OS3 screens

Verdict

The call

The clearest difference is rating: CK OS at 5.0 against KS OS's 3.3. KS OS's advantage is ratings volume (50 vs 1). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

CK OS holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: KS OS has 50 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

KS OS ships an update every 4 weeks, CK OS fortnightly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
KS OS versus CK OS: the parameters behind the verdict, then further details
ParameterKS OSCK OS
PriceFreeFree
Rating3.3 (50 ratings)5.0 (1 ratings) — better
Positive reviews17.9% of reviews—
Number of ratings50 — better1
Update frequencyEvery 4 weeksFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.013.0
Further details — not scored
Size198 MB255 MB
Age rating4+4+
Developer上海凯斯领拓技术有限公司Shenzhen Aienmi Technology Co., Ltd.

Customer experience

KS OS

All ratings30 ratings
Positive53.3%
Neutral10.0%
Negative36.7%
Written reviews84 reviews
Positive17.9%
Neutral19.0%
Negative63.1%

CK OS

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

KS OS

No in-app purchases

None

CK OS

No in-app purchases

Questions

Is KS OS free?
KS OS is free to download, with no in-app purchases.
Is CK OS free?
CK OS is free to download, with no in-app purchases.
Which has better reviews, KS OS or CK OS?
CK OS is rated higher. KS OS averages 3.3 out of 5 from 50 ratings, while CK OS averages 5.0 from 1 ratings.
Do KS OS or CK OS have ads?
Neither KS OS nor CK OS shows ads.
Which is updated more often, KS OS or CK OS?
KS OS ships an update every 4 weeks, and CK OS fortnightly. Most recently, KS OS was updated on November 3, 2026 and CK OS on October 30, 2026.

Other comparisons