onsim: Exercise to Your Rhythm
Workout Just for You
Free
■ Personalized Workouts for You
- We analyze your age, gender, resting heart rate, and health survey responses to recommend the most effective and safe target heart rate zone for you.
■ Explanations from the Experts
- Get a detailed breakdown of your health status, along with the reasoning behind why you should exercise this way.
■ Weekly Goals at a Glance
- Check your progress toward this week's goals at a glance and stay motivated.
■ Heart Rate Analysis by Workout
- See how effective today's workout was through your heart rate graph.
■ My Health Change Report
- Easily record and track your weekly changes in exercise, sleep, and overall health.
■ Building Healthy Habits Together
- Share your records, grow alongside your peers, and keep your consistency going.
■ Who onsim Is For
- Those who already exercise but feel they're not seeing enough results
- Those who want to safely improve their fitness without pressure
- Those who hesitate to start exercising due to conditions such as hypertension, diabetes, or dyslipidemia
■ Frequently Asked Questions
Q. Do I really need a wearable device?
- If you have a device that can measure your heart rate via Bluetooth, you'll be able to access heart rate–based workout analysis and personalized feedback for more accurate health management. To fully experience onsim's core features, we recommend connecting a device.
Q. How are my target heart rate and workout duration calculated?
- onsim determines your personalized target heart rate zone (Onsim Zone) and workout duration based on your age, gender, resting heart rate, and health survey responses, following the scientifically validated ACSM (American College of Sports Medicine) guidelines.
Q. Where is my workout data collected from?
- We use data provided by your phone and smartwatch. We collect and analyze data such as heart rate, step count, distance, calories, and workout time to provide you with reports.
Q. Is this a medical service?
- No. onsim is a health management and exercise guidance app. It does not replace medical diagnosis or treatment, and if you have any health concerns or are currently undergoing treatment, you must consult a medical professional.
※ This app is not a medical device and does not replace medical diagnosis, treatment, or prescription. The app is not responsible for any issues that may arise from the user's use of the information provided.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
⏺ Squashed all those bugs hiding in every corner!
⏺ Now you can check your Onsim heart rate while working out on the Onsim watch app!
The developer, 에이치비커넥트, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
- Contact Info
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- HBconnect
- Size
- 76.2 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.6 or later.
- iPhone
- Location
- This app may use your location even when it isn’t open, which can decrease device battery life.
- Languages
- English and Korean
- Age Rating
16+
- 16+
- Infrequent
Medical Treatment information
Simulated Gambling
Contests
Contains
Loot Boxes
Messaging and Chat
User-Generated Content
Health or Wellness Topics
- Copyright
- © 2026 HBconnect