Best Kstyle OS Apps

228+ iOS apps curated and reviewed

4.1 avg rating
20 free apps
Updated May 2026

From beginner-friendly picks to power-user tools, our kstyle os list covers 228+ iPhone apps updated through May 2026. Compare ratings, prices, and screenshots in one place.

Top Picks for Kstyle OS

Kstyle OS#1

Kstyle OS by Shanghai Kieslect Technology Company Limited

Editor's Choice
💪 Health & Fitness
3.4(9 ratings)
Free
Kstyle OS screenshot 1
Kstyle OS screenshot 2
Kstyle OS screenshot 3

This app is a companion for a smartwatch, allowing users to receive and respond to calls and messages directly from the watch, as well as track fitness data such as heart rate and activity levels. It also enables users to set reminders and alarms on their watch, promoting a healthy lifestyle.

Da Fit#2

Da Fit by MO YOUNG LIMITED

Strong Contender
💪 Health & Fitness
4.7😐(206K ratings)
FreeAds
Da Fit screenshot 1
Da Fit screenshot 2
Da Fit screenshot 3
Da Fit screenshot 4
Da Fit screenshot 5

Get accurate motion tracking, detailed sleep analysis, and exercise insights with this app. Connect to multiple devices, monitor your health, and stay motivated to lead an active lifestyle. Download now for a better, healthier you.

What We Love

  • 💎 Great value for the price
  • 🚀 Lots of features
  • 👍 Customizable watch faces
  • 🔋 Good battery life

Room to Improve

  • 🐛 Inaccurate step counting
  • 🐛 Sleep tracking issues
  • 🐛 Unreliable blood pressure readings
FitCloudPro#3

FitCloudPro by 欣 黄

Worth Considering
💪 Health & Fitness
3.6😐(3.6K ratings)
Free
FitCloudPro screenshot 1
FitCloudPro screenshot 2
FitCloudPro screenshot 3
FitCloudPro screenshot 4

Stay on top of your health with FitCloudPro! Track your exercise, sleep, receive notifications, set reminders, monitor hydration, control camera, and more with this smart watch app. Join FitCloudPro now for a healthier lifestyle.

What We Love

  • 👍 Easy to use
  • 🚀 Accurate health tracking
  • 💡 Customizable watch faces
  • 🔒 Reliable Bluetooth connection

Room to Improve

  • 🐛 Inconsistent sleep tracking
  • 🔋 Short battery life
  • 🚫 Limited watch face options

More Kstyle OS apps to explore

4
WHOOP
WHOOP
WHOOP
by Whoop Incorporated
Free

This application is a wearable device that tracks sleep, strain, recovery, stress, and health biometrics 24/7 to provide personalized coaching for optimal performance. It offers insights into sleep quality, daily strain levels, stress management techniques, and monitoring of recovery readiness, along with tracking the impact of various behaviors.

💪 Health & Fitness
(742)
5
VeryFitPro
VeryFitPro
VeryFitPro
by Shenzhen DO Intelligent Technology Co., Ltd.
Free

Track your exercise, sleep, heart rate, and receive alerts with this smart band app. Monitor your physical activity, calorie consumption, and sleep quality while syncing data to Apple Health for a comprehensive health overview.

💪 Health & Fitness
(4.1K)
6
FITIV Workout & Health Tracker
FITIV Workout & Health Tracker
FITIV Workout & Health Tracker
HRV, Sleep & Heart Rate Zones
Free

Get the ultimate fitness companion for unlocking your workout potential with comprehensive heart rate monitoring and personalized fitness data integration. Track progress, set goals, and enjoy live workout streaming with this all-in-one app. Crush your fitness targets and elevate your performance with guided workout planning, live coaching, and detailed exercise analysis. Start your fitness journey today!

💪 Health & Fitness
(13K)
7
iTOUCH Wearables
iTOUCH Wearables
iTOUCH Wearables
iTOUCH Wearables
Free

"Stay connected, motivated, and in control of your health and fitness goals with our ultimate smartwatch app. Track steps, monitor heart rate, set activity goals, receive notifications, and more to enhance your well-being. Download now for a healthier, more active lifestyle!"

💪 Health & Fitness
(48K)
8
Withings
Withings
Withings
THE NEXUS OF YOUR HEALTH
Free

Track your weight, blood pressure, and sleep with this powerful health app. Get personalized health insights and take control of your well-being today.

💪 Health & Fitness
(353K)
9
HryFine
HryFine
HryFine
HryFine
Free

Track your exercise, monitor sleep, receive notifications, and more with this versatile app. Stay on top of your health goals and never miss important information.

⚽ Sports
(1.6K)
10
Wear OS by Google
Wear OS by Google
Wear OS by Google
Formerly Android Wear
Free

The app syncs your smartwatch and phone, allowing you to access Google Assistant, track health, control music, check notifications, and more directly from your wrist. Experience a seamless integration between your devices and enhance your daily activities.

🔧 Utilities
(4.1K)
11
Zeroner(Zeroner health Pro)
Zeroner(Zeroner health Pro)
Zeroner(Zeroner health Pro)
by 红甲 祝
Free

Track your health and fitness with Zeroner Health Pro - your ultimate companion for monitoring steps, calories, distance, sleep, and more using a stylish bracelet and Bluetooth connectivity. Sync data with your phone and receive call and SMS notifications for a complete health experience.

💪 Health & Fitness
(1.6K)
12
Oura
Oura
Oura
by Oura Health Oy
Free

Monitor and improve your health with a revolutionary smart ring that tracks over 20 biometrics like heart rate and body temperature. Get personalized insights on sleep, activity, and stress resilience, and track your daily movements to stay balanced and healthy. Start optimizing your routine today!

💪 Health & Fitness
(11K)
13
EōS Fitness
EōS Fitness
EōS Fitness
by Fitness Alliance LLC
Free

Elevate your fitness routine with our all-in-one app for tracking workouts, personalized training plans, activity levels, challenges, class schedules, and more. Reach your fitness goals with engaging insights and motivation. Email us at digitalsupport@egym.com for any questions!

💪 Health & Fitness
(4.3K)
14
Cronometer: Calorie Counter
Cronometer: Calorie Counter
Cronometer: Calorie Counter
Nutrition, macro, diet tracker
Free

Track your daily food intake and nutritional information with precision using this advanced calorie counter app. Set personal goals, monitor macros, and track your diet to maintain a healthy lifestyle. Download now for accurate and comprehensive food tracking.

💪 Health & Fitness
(1.3K)
15
Google Fit: Activity Tracker
Google Fit: Activity Tracker
Google Fit: Activity Tracker
Track your health and fitness
Free

Track your health and fitness with a versatile activity tracker that collaborates with WHO and AHA to set activity goals known as Heart Points. It provides detailed workout insights, goal monitoring, and integration with various apps and devices for a holistic view of your health progress. Dive into a healthier lifestyle with Google Fit. Visit https://www.google.com/fit to learn more.

💪 Health & Fitness
(2.1K)
16
Connect IQ™ Store
Connect IQ™ Store
Connect IQ™ Store
by Garmin International
Free

Easily enhance your device with a variety of free apps from the Store for added functionality like music streaming, widgets, data fields, and custom watch faces. Streamline your experience by conveniently managing all your downloads in one place.

🔧 Utilities
(8.2K)
17
Map My Fitness Workout Tracker
Map My Fitness Workout Tracker
Map My Fitness Workout Tracker
Daily Exercise & Gym Training
Free

Track your gym workouts easily with personalized routines, over 800 exercises, and community sharing. Connect with devices and apps like Under Armour shoes, MyFitnessPal, and more to achieve your fitness goals efficiently. Upgrade to MVP Premium for advanced features like Live Tracking and personalized training plans. Start your fitness journey today!

💪 Health & Fitness
(77K)
18
Activity Tracker・FitnessView
Activity Tracker・FitnessView
Activity Tracker・FitnessView
Exercise・Workout・Step Counter
Free

Track your exercise, workouts, and daily steps with FitnessView. Syncs seamlessly with Watch Activity and Health apps for a comprehensive overview of your health and fitness progress. Start tracking today!

💪 Health & Fitness
(7.3K)
19
Fossil Smartwatches
Fossil Smartwatches
Fossil Smartwatches
Function, Fossil Style
Free

Track steps, monitor sleep, and receive alerts from favorite apps with the Fossil Smartwatches companion app. Customize buttons, dial design, and settings to make your smartwatch uniquely yours. Stay connected and in control - download now!

🌟 Lifestyle
(51K)
20
KS OS
KS OS
KS OS
by Shanghai Kieslect Technology Company Limited
Free

KS OS is a sports and health app that integrates functions for health data recording, movement track recording, and wearable device control, helping you focus on exercise and improve your overall well-being. With features like setting alarms, recording sleep data, monitoring weight trends, and more, KS OS serves as your exclusive health steward. Experience a new level of health management and exercise tracking by connecting your wearable device to KS OS.

💪 Health & Fitness
(30)