Cardiogram - HR Monitor
Private Heart Rate Tracker
£2.99 · Designed for iPad
Real-time heart rate & BPM tracking for Apple Watch and BLE monitors. Private offline HR zone & workout tracking with Apple Health sync. No account. No subscription.
Cardiogram is a private, real-time heart rate monitor, BPM tracker, and workout analysis app designed for iPhone, Apple Watch, and Apple Health users. Monitor, record, and analyze your heart rate during workouts, recovery, daily activity, or rest, with all data stored securely on your device.
Unlike subscription fitness apps, Cardiogram works without accounts, cloud services, or data sharing, giving you complete control over your health information.
Real-Time Heart Rate & BPM Tracking
Track your heart rate and BPM live using Apple Watch or compatible Bluetooth Low Energy (BLE) heart rate monitors. Whether you're training, running, cycling, or monitoring your daily fitness, Cardiogram delivers accurate real-time heart rate data when you need it most.
Apple Health Integration & Workout Analysis
Import and analyze workouts stored in Apple Health, including sessions recorded with Apple Watch and other compatible fitness apps. Cardiogram automatically keeps your workout history up to date, making it easy to review heart rate trends, training intensity, and performance over time.
Recovery Heart Rate
Understand how your body recovers after exercise with the 1-minute Recovery Heart Rate metric. Track your recovery across workouts and gain valuable insights into your cardiovascular fitness and training progress.
Heart Rate Zones for Smarter Training
Visualize workout intensity instantly with color-coded heart rate zones:
• Fitness
• Fat Burn
• Aerobic
• Anaerobic
• Maximum Effort
See how much time you spend in each zone and optimize your workouts for endurance, fat burning, cardiovascular fitness, or peak performance.
Privacy-First by Design
Your health data stays private.
• No account required
• No cloud storage
• No tracking or data selling
• Data stored locally on your iPhone and Apple Health
Built for users who want accurate heart rate tracking and workout analysis without compromising their privacy.
Wide BLE Monitor Compatibility
Connect external heart rate sensors including:
• Polar
• Garmin
• Wahoo
• CooSpo
• Magene
• Other Bluetooth heart rate monitors
Ideal for runners, cyclists, gym enthusiasts, and anyone who trains with a Bluetooth heart rate monitor.
Fast & Battery Efficient
Cardiogram is optimized for long workouts with minimal battery usage, providing reliable heart rate monitoring and workout analysis throughout every training session.
Built for Training & Everyday Health
Use Cardiogram to:
• Monitor your heart rate in real time
• Track workout intensity and heart rate zones
• Analyze workouts from Apple Health
• Measure Recovery Heart Rate
• Review heart rate history and trends
• Record heart rate sessions
• Improve training with actionable heart rate insights
Simple, accurate, private, and built to help you better understand your heart rate.
Disclaimer: Cardiogram is not a medical device and does not diagnose, treat, or prevent medical conditions. Always consult a healthcare professional regarding health concerns.
more Great little app that helps me with monitoring my hr from chest sensor. There are few missing functions like adding notes or ability to select type of workout run, yoga, weights. I would like to be able to calculate calories and see battery level of my sensor. There are few bugs when changing screens. Overall great app and I can’t wait to see what future updates will bring.
Developer Response Thank you for your review and. suggestionsWe just updated the app, fixed the changing screen bug and optimized it for iOS 15. We already working to add notes for workouts and will soon come up with an update.
Great little app that helps me with monitoring my hr from chest sensor. There are few missing functions like adding notes or ability to select type of workout run, yoga, weights. I would like to be able to calculate calories and see battery level of my sensor. There are few bugs when changing screens. Overall great app and I can’t wait to see what future updates will bring.
Thank you for your review and. suggestionsWe just updated the app, fixed the changing screen bug and optimized it for iOS 15. We already working to add notes for workouts and will soon come up with an update.
This is a super little app for those that don’t have (and don’t want) an Apple Watch… it does exactly what it says on the tin.For me - being very privacy conscious - probably the single biggest benefit is that there’s no need to register or worry about having all your details harvested by some anonymous 3rd party and used for goodness knows what purposes.Integrated seamlessly with my Coospo HW706 heart rate monitor (purchased in 2023) and Apple Health.Yes I’d like a few more features (such as being able to add a custom workout type, for example) - but for the money I’m delighted.
This is a super little app for those that don’t have (and don’t want) an Apple Watch… it does exactly what it says on the tin.For me - being very privacy conscious - probably the single biggest benefit is that there’s no need to register or worry about having all your details harvested by some anonymous 3rd party and used for goodness knows what purposes.Integrated seamlessly with my Coospo HW706 heart rate monitor (purchased in 2023) and Apple Health.Yes I’d like a few more features (such as being able to add a custom workout type, for example) - but for the money I’m delighted.
This is a fabulous app. It synced with my CooSpo H6 Heart Rate Monitor (Chest Strap) Sensor with no problem via iPhone. When I posted a question re the app I received a prompt reply. You can’t get better than that.👏
This is a fabulous app. It synced with my CooSpo H6 Heart Rate Monitor (Chest Strap) Sensor with no problem via iPhone. When I posted a question re the app I received a prompt reply. You can’t get better than that.👏
I check my pulse on a daily basis as I have a heart condition and I’ve found this app to be very reliable. It also lets me track my heart rate for longer periods of timeSurprisingly I managed to connect it to my Mi Band straight away with no issues, which has always been a hassle with other apps I’ve tried 👍
I check my pulse on a daily basis as I have a heart condition and I’ve found this app to be very reliable. It also lets me track my heart rate for longer periods of timeSurprisingly I managed to connect it to my Mi Band straight away with no issues, which has always been a hassle with other apps I’ve tried 👍
• Import and analyze workouts from Apple Watch and other apps through Apple Health.
• Added Recovery Heart Rate (1-minute) to workout details for deeper training insights.
• Workout history now updates automatically when new sessions are added to Apple Health.
• Improved workout details with clearer session information and heart rate zone summaries.
• Performance improvements, bug fixes, and enhanced reliability throughout the app.
11.2 22 Jul
Bug Fixes & Improvements
- Fixed an issue that could occasionally cause the app to crash when starting or ending workouts from Apple Watch.
- Improved Apple Watch connectivity and compatibility with the latest iOS and watchOS versions for a more reliable experience.
- Fixed compatibility with certain heart rate monitors from Polar, Garmin, Wahoo, and other supported devices.
- Resolved a rare issue where workout sessions could continue running after leaving the monitor screen.
- Improved performance during long workouts for faster and more responsive heart rate statistics.
- General bug fixes and stability improvements.
11.0 23 Jun
This update brings improvements across the app to make your heart rate tracking experience even better.
What's new:
• Improved stability and reliability
• Faster connections and smoother performance
• Enhanced workout experience
• Better battery efficiency
• Refined charts and heart rate zones
• General bug fixes and usability improvements
Cardiogram remains fast, private, and fully offline — no accounts, no cloud, no tracking.
10.9 14 Jun
This update improves Apple Watch connectivity and overall performance.
What’s new:
• Faster and more reliable Apple Watch connection
• Improved real-time heart rate streaming stability
• Smoother switching between Apple Watch and BLE monitors
• Better performance during workouts
• Optimized battery efficiency
• General bug fixes and improvements
Cardiogram remains private and fully offline — no accounts, no cloud, no tracking.
10.8 5 May
Our most reliable heart rate tracking yet. We have completely overhauled how your Watch and iPhone stay connected to ensure you never miss a beat. Your heart rate data is now automatically saved even if your phone is out of range, and syncs perfectly the moment you are back. We have also added a new workout picker so you can choose activities like Yoga, Cycling, or Hiking, along with real-time indicators so you always know your devices are synced.
10.7 27 Apr
Row your way to a stronger heart. We have added Rowing workouts to our supported activities and significantly improved Apple Watch connectivity for a more seamless and reliable data sync.
10.6 14 Apr
We’ve polished the heart of the app! This update includes bug fixes and performance improvements to ensure your tracking experience is smoother and more reliable.
10.5 30 Mar
Improved reliability and smoother heart rate monitoring. This update includes bug fixes, performance improvements, and stability enhancements to make Cardiogram work better during every session.
Disclaimer: Cardiogram is not a medical device and does not diagnose or treat health conditions. Consult a healthcare professional before making medical decisions.
10.4 17 Mar
• Fixed several issues affecting connectivity and stability when using Cardiogram with Apple Watch.
• Improved reliability during heart rate monitoring sessions.
• Additional bug fixes and performance improvements.
We’re committed to making Cardiogram as reliable and smooth as possible. Thank you for your feedback and support!
Disclaimer: Cardiogram is not a medical device and does not diagnose or treat health conditions. Consult a healthcare professional before making medical decisions.
10.3 10 Mar
Apple Watch support has arrived. You can now use Apple Watch as a heart rate source and view live heart rate data on iPhone during workouts.
What’s new:
• Apple Watch heart rate streaming to iPhone
• Seamless switching between Apple Watch and BLE heart rate monitors
• Improved workout stability and performance
• More accurate Apple Health synchronization
• Enhanced battery efficiency for longer sessions
• Refined interface with clearer charts and heart rate zones
• General bug fixes and performance improvements
Cardiogram remains private and fully offline — no accounts, no cloud, no tracking.
Disclaimer: Cardiogram is not a medical device and does not diagnose or treat health conditions. Consult a healthcare professional before making medical decisions.
10.2 3 Mar
Apple Watch support is here. Cardiogram now lets you use Apple Watch as a heart rate provider. Start a workout on your watch and see your heart rate live on iPhone.
What’s new:
* Apple Watch heart rate support with live streaming to iPhone
* Easy switching between Apple Watch and BLE sensors (Polar, Garmin, Wahoo, CooSpo, Magene, and more)
* Improved stability and performance during workouts
* Smarter Apple Health syncing with better accuracy
* Better battery efficiency for long sessions
* Refined UI, clearer charts, and improved heart rate zones
* Bug fixes and performance improvements
Cardiogram remains fast, private, and fully offline. No accounts, no cloud, no tracking.
Disclaimer: Cardiogram is not a medical device and does not diagnose or treat health conditions. Consult a healthcare professional before making medical decisions.
10.1 29 Jan
Cardiogram is a fast, private, and beautifully simple heart rate monitor designed for iPhone and Apple Health. It reads your heart rate in real time, works fully offline, and keeps all your data on your device - no accounts, no cloud, no tracking.
• Stronger privacy & rock-solid stability for a smoother, more reliable experience.
• Smarter Apple Health syncing with improved accuracy and faster updates.
• Upgraded BLE connectivity for seamless pairing with sensors like Polar, Garmin, Wahoo, CooSpo, Magene, and more.
• Better battery performance, perfect for long runs, workouts, or all-day monitoring.
• Sharper visuals, with refined charts, a cleaner UI, and improved color-coded heart rate zones.
• Bug fixes and performance improvements throughout the app for a more polished experience.
Whether you're training, recovering, or keeping an eye on your heart, Cardiogram gives you control, clarity, and peace of mind - without sacrificing your privacy.
Disclaimer: Cardiogram is not a medical device and does not diagnose or treat health conditions. Consult a healthcare professional before making medical decisions.
10.0 10/12/2025
Cardiogram is a sleek and reliable heart rate monitor app built with privacy first. Designed for iPhone and Apple Health users, it records your heart rate in real time, stores all data locally, and works completely offline - no accounts or cloud services required.
What’s New:
• Enhanced privacy and stability for smoother performance.
• Improved Apple Health integration for more accurate syncing.
• Refined BLE connectivity with popular sensors like Polar, Garmin, and Wahoo.
• Optimized energy use for longer workouts and continuous tracking.
• Visual updates with cleaner charts and color-coded workout zones.
Whether you’re training, tracking sleep, or monitoring stress, Cardiogram helps you stay in control of your heart health - securely and accurately.
Disclaimer: Cardiogram is not a medical device and does not diagnose or treat conditions. Always consult a healthcare professional before making health decisions.
9.9 10/11/2025
Introducing the new Liquid Glass design for iOS 16+, giving Cardiogram a fresh, modern, and fluid look.
What’s improved:
- Stability: Fewer crashes and a more dependable experience.
- Connectivity: Stronger, more reliable links with your heart rate monitors.
- Performance: Faster responses and a snappier feel across the app.
Thanks for your continued feedback - it helps us keep making Cardiogram better.
Disclaimer: Cardiogram is not a substitute for professional medical advice. Always consult a healthcare professional for any health concerns.
9.8 02/10/2025
We’ve polished Cardiogram to make it smoother, faster, and more reliable than ever!
What’s improved:
- Stability: Fewer crashes and a more dependable experience.
- Connectivity: Stronger, more reliable links with your heart rate monitors.
- Performance: Faster responses and a snappier feel across the app.
Thanks for your feedback - it keeps us moving forward!
Disclaimer: Cardiogram is not a substitute for professional medical advice. Always consult a healthcare professional for any health concerns.
9.7 12/08/2025
This update focuses on making your Cardiogram experience even better! We've worked hard to boost overall performance and squash pesky bugs, resulting in a more stable and seamless app.
You'll notice improved:
- App Stability: Fewer crashes and a more dependable experience.
- Heart Rate Monitor Connectivity: A smoother and more reliable connection to your devices.
- Overall Performance: Quicker responses and a snappier feel throughout the app.
We're committed to providing you with a more seamless and dependable tracking experience. Thanks for your continued feedback – it helps us make Cardiogram even better!
Disclaimer: Cardiogram is not a substitute for professional medical advice. Always consult a healthcare professional for any health concerns.
9.6 14/07/2025
Performance Boost & Bug Fixes
This update is all about making your experience smoother and more reliable. We've squashed bugs to improve app stability, enhanced connectivity with heart rate monitors, and smoothed out overall performance.
Enjoy a more seamless and dependable tracking experience. Thanks for your feedback!
Disclaimer: Not a substitute for medical advice. Always consult a healthcare professional.
9.5 28/06/2025
Stay in control of your heart health with the latest updates to Cardiogram: HR Monitor! We’ve packed this version with powerful new features and improvements for all heart rate monitor users—whether you use Polar, Wahoo Fitness, CooSpo, Kickr, or any Bluetooth HR sensor.
- Live Activity Widget: Instantly view your heart rate and workout stats right on your home screen for real-time tracking.
- Heart Rate Alarms: Get notified if your HR (frecuencia cardíaca) goes above your custom max—perfect for safe training and peace of mind.
- Custom Max Heart Rate: Set your own max HR based on medical advice, not just age formulas.
- More Activities: Now track yoga, meditation, and more for a complete fitness and workout overview.
- Improved Charts: Enjoy clearer, more detailed graphs to analyze your cardio sessions and health trends.
- Enhanced HealthKit Sync: Faster, more reliable integration with Apple Health for seamless data syncing.
- SwiftUI Interface: Experience a modern, smooth, and responsive app design across all iOS devices.
- Device Compatibility: Now supports Magene H303, CooSpo HW706, Polar, Wahoo, and more heart rate monitors.
- Better Battery Life: Optimized for low energy use, so you can track longer workouts.
- Optimized for iOS 17+: Enjoy the best performance on the latest iOS.
- Privacy First: No account or location required—your data stays private and secure.
Whether you’re tracking your heart rate, recording workouts, or monitoring your health, Cardiogram: HR Monitor is your trusted app for accurate, real-time cardio insights.
Disclaimer: Cardiogram: HR Monitor is not a substitute for professional medical advice. Always consult a healthcare professional for medical decisions.
9.4 15/06/2025
Exciting New Updates in Cardiogram! We’ve been hard at work making Cardiogram even better for you. Check out what’s new:
Live Activity Widget: Your heart health, live on your Lock Screen! Keep an eye on your pulse effortlessly.
Smart Heart Rate Alarms: Get instant alerts if your heart rate goes above your personalized safe limit. Stay informed, stay safe.
Truly Custom Max Heart Rate: Set your maximum heart rate based on your doctor’s advice, not just generic formulas.
Expanded Activity Tracking: Namaste! Now track Yoga, Meditation, and even more activities for a complete picture of your fitness.
Revamped Charts: Dive deeper into your heart health with our beautifully redesigned, easy-to-understand graphs.
Supercharged HealthKit Sync: Enjoy lightning-fast and ultra-reliable data import from Apple Health.
Sleek SwiftUI Interface: Experience a buttery-smooth, modern, and intuitive app, now fully built with SwiftUI.
Flawless Responsive Design: Looks and works beautifully on every device, with major usability enhancements.
Broader Device Support: We now seamlessly connect with Magene H303 and CooSpo HW706 Armband heart rate monitors!
Extended Battery Life: Track for longer! We’ve further optimized for minimal power use.
Optimized for iOS 17+: Enjoy peak performance, perfectly tailored for the latest iOS.
Your Privacy, Our Priority: Still no accounts, no location tracking. Your data is yours, always.
DISCLAIMER: This app is not a substitute for professional medical advice. Always consult a healthcare professional for medical decisions.
9.3 13/05/2025
Live Activity Widget: Stay on top of your heart health with a dynamic live activity widget, right on your home screen.
Heart Rate Alarms: Receive instant notifications if your heart rate exceeds your custom maximum limit.
Custom Max Heart Rate: Personalize your maximum heart rate based on medical advice, not just age-based calculations.
More Activities: Now track yoga, meditation, and other activities for a more comprehensive fitness overview.
Improved Charts: Enjoy detailed, easy-to-read graphs for better insights into your heart health.
Enhanced HealthKit Import: Faster and more reliable syncing with Apple Health for seamless data integration.
SwiftUI Interface: Experience a smoother, more modern app design with our full migration to SwiftUI.
Responsive Interface: Significant usability and design improvements across all devices.
Device Compatibility: Now supports Magene H303 and CooSpo HW706 Armband heart rate monitors.
Improved Battery Efficiency: Optimized for minimal power consumption, so you can track longer.
Optimized for iOS 17+: Enhanced performance tailored for the latest iOS release.
Privacy First: No account creation or location services required—your data stays yours.
DISCLAIMER: This app is not a substitute for professional medical advice. Always consult a healthcare professional for medical decisions.
9.2 07/04/2025
Live Activity Widget: Add a dynamic live activity widget to your home screen for continuous monitoring.
SwiftUI Interface: Fully migrated to SwiftUI for a smoother and more modern interface.
More Activities: Expanded tracking now includes yoga, meditation, and other activities.
Heart Rate Alarms: Get notified when your heart rate exceeds your maximum limit.
Custom Max Heart Rate: Adjust your maximum heart rate based on medical advice, not just age-based calculations.
Enhanced HealthKit Import: Faster and more reliable syncing with Apple Health.
Improved Charts: New detailed and easy-to-understand graphs.
Responsive Interface: Significant usability and design improvements for all devices.
Device Compatibility: Now supports Magene H303 and CooSpo HW706 Armband heart rate monitors.
Improved Battery Efficiency: Optimized for minimal power consumption.
Privacy First: No account creation or location services required.
Optimized for iOS 17: Enhanced performance for the latest iOS release.
Disclaimer: This app is not a substitute for professional medical advice. Always consult a healthcare professional for medical decisions.
9.1 18/02/2025
Heart Rate Alarms: Set an alarm to notify you when your heart rate goes above your custom limits.
Device Compatibility: Now supports Magene H303 and CooSpo HW706 Armband heart rate monitors.
More Workouts: Expanded tracking now includes yoga, meditation, and more activities.
Custom Max Heart Rate: Adjust your maximum heart rate based on medical advice instead of just age-based calculations.
Resting Heart Rate Check: Quickly measure with a long press on the Start button.
Improved Battery Efficiency: Optimized for minimal power consumption.
New iOS Widget: Add a heart rate widget to your home screen (iOS 16+).
Privacy First: No account creation or location services required.
Optimized for iOS 17: Enhanced performance for the latest iOS release.
Disclaimer: This app is not a substitute for professional medical advice. Always consult a healthcare professional for medical decisions.
9.0 20/12/2024
Sound alarms for heart rate limits: Activate a new setting to trigger an alarm when your heart rate exceeds set limits.
Added support for Magene H303 Heart Rate Monitor.
Added support for CooSpo HW706 Armband Heart Rate Monitor.
Expanded workout tracking: Now includes yoga, meditation, and more.
Customize your maximum heart rate: Set it based on medical advice, not just age.
Quick resting heart rate check: Measure it with a long tap on Start.
Enhanced energy efficiency for minimal battery drain.
New home screen widget for iOS 16+ users.
No mandatory account creation or location services required.
Optimized for the latest iOS release.
DISCLAIMER: This app is not intended for medical diagnoses or treatments. Please consult a healthcare professional before making any medical decisions based on app records.
8.9 02/10/2024
Sound alarms for heart rate limits: Activate a new setting to trigger an alarm when your heart rate exceeds set limits.
Added support for Magene H303 Heart Rate Monitor.
Expanded workout tracking: Now includes yoga, meditation, and more.
Customize your maximum heart rate: Set it based on medical advice, not just age.
Interface improvements: Enhanced user experience, especially on iPhone SE.
Quick resting heart rate check: Measure it with a long tap on Start.
Added support for CooSpo HW706 Armband Heart Rate Monitor.
Enhanced energy efficiency for minimal battery drain.
New home screen widget for iOS 16+ users.
Seamlessly sync data with Apple Health for a complete wellness overview.
No mandatory account creation or location services required.
Optimized for the latest iOS release.
DISCLAIMER: This app is not intended for medical diagnoses or treatments. Please consult a healthcare professional before making any medical decisions based on app records.
8.8 25/08/2024
Sound alarm on limits: New setting to enable sound alarm when heart rate limits are reached
New compatible heart rate monitor: Magene H303 Heart Rate Monitor
Track new workouts: Yoga, meditation, and more
Set maximum heart rate based on your medical advice, not just age
Fixed interface bugs: Improved user experience on iPhone SE
Measure resting heart rate with a long tap on Start
New compatible heart rate monitor: CooSpo HW706 Armband Heart Rate Monitor
Improved energy efficiency for minimal battery impact
Introducing a home screen widget for iOS 16+ users
Sync data with Apple Health for a complete wellness overview
No mandatory account creation or reliance on location services
Optimized for the latest iOS release
DISCLAIMER: This app does not provide medical diagnoses or treatments. Consult a healthcare professional before making any medical decisions based on app records.
8.7 27/07/2024
• Import and analyze workouts from Apple Watch and other apps through Apple Health.
• Added Recovery Heart Rate (1-minute) to workout details for deeper training insights.
• Workout history now updates automatically when new sessions are added to Apple Health.
• Improved workout details with clearer session information and heart rate zone summaries.
• Performance improvements, bug fixes, and enhanced reliability throughout the app.
more Version 11.2 22 Jul
Data Not Collected The developer does not collect any data from this app.
