Cardiogram - HR Monitor

Cardiogram - HR Monitor

Private Heart Rate Tracker

12 ratings
16 reviews
$3.99

Details

  • Released
  • Updated

Features

Cardiogram - HR Monitor video #1 for iPhone
Cardiogram - HR Monitor screenshot #2 for iPhone
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Cardiogram - HR Monitor screenshot #8 for iPhone
Cardiogram - HR Monitor screenshot #9 for iPhone
Cardiogram - HR Monitor screenshot #10 for iPhone
Cardiogram - HR Monitor screenshot #11 for iPhone
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About

This app provides real-time heart rate and BPM tracking using your Apple Watch or compatible Bluetooth monitors. It prioritizes user privacy by storing all data locally on your device without accounts or cloud syncing. Visualize workout intensity with heart rate zones and optimize your training.

Real-time heart rate and BPM tracking
Privacy-first design with local data storage
Apple Health integration
Heart rate zones for training intensity
Compatibility with BLE heart rate monitors
Efficient and battery-friendly operation
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What's New in Cardiogram

11.3

August 22, 2026

This update brings major improvements to Apple Watch connectivity, workout sync reliability, and Live Activity visual widgets - crafted to perfection for your daily training. New Features - Dynamic HR Zone Colors in Live Activity: Your Lock Screen and Dynamic Island widgets now display real-time heart rate using color-coded zone indicators (Warm-Up to Max Effort) so you can track intensity at a glance. - Two-Way Workout Type Sync: Changing your selected activity on either your iPhone or Apple Watch now updates both devices instantly. - Expanded Health Import & Source Labels: The Sessions tab now displays workouts from all Apple Health sources (including Strava, Apple Workouts, and third-party apps) with explicit source labeling. Fixes & Reliability Enhancements - Eliminated Phantom Workout Starts: Resolved an issue where opening, foregrounding, or reconnecting the Apple Watch app could mistakenly auto-start a session on either device. - Live Activity Timer Fix: Fixed an issue where the Live Activity elapsed duration timer could remain stuck at 0. - Smoother Session Transitions: The "Save workout?" prompt now automatically clears when a new session begins, preventing lingering alerts from interfering with fresh workouts. - Watch State Consistency: Ensured the watch app accurately resets its running state when returning from the background. Disclaimer: Cardiogram is not a medical device and does not diagnose, treat, or prevent medical conditions. Always consult a healthcare professional regarding health concerns.

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User reviews

Doesn’t work with Apple Health

Doesnt work with Apple Health.

Doesn’t really do anything other than show you your heart rate, which many other apps do for free.

No answers from support

Response from developer

Hi, sorry to hear about your experience. Cardiogram can read heart rate and workout data from Apple Health, including data recorded by Apple Watch and other compatible sources. We also do answer support requests, although sometimes replies can end up in spam or junk folders. Please contact us with more details and we’ll be happy to help.

iPad app

the version for iPad does not save any sessions and crashes every time you stop the measuring. iPadOS 17.7.11

Works well

Works well for recording heart rate during workouts with good privacy protection. Would be nice if it could also record GPS position so I could correlate where I was on my ride with the heart rate data.

Overall great, with show stopping recent problem

I’ve been a happy user of Cardiogram for some years, but as of the most recent update (in February 2025, I believe) it’s no longer writing HR samples to Apple Health for me. This is the only reason I use Cardiogram, as a kind of relay between my Bluetooth HR strap & the Apple Health database. (Which is to say, I don’t use its “workout” features.) I’m not able to access the Facebook page that the App Store support links to, so am posting here to give some visibility to the developer. Thanks.
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Response from developer

please update to the latest version ... we solved your problem thank you again for your feedback and patience

A great little app!

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.
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Developer apps

FAQ

What is Cardiogram?

Cardiogram is a private, real-time heart rate monitor and BPM tracker designed for iPhone, Apple Watch, and Apple Health users. It allows you to monitor your heart rate during workouts, daily activity, recovery, or rest with all data stored securely on your device.

How does Cardiogram protect my privacy?

Cardiogram is privacy-first by design. It requires no account, no cloud storage, and does not track or sell your data. All your health information is stored locally on your iPhone and Apple Health.

What devices does Cardiogram support?

Cardiogram is supported on iPhone, iPad, and Apple Watch. It can track live heart rate using an Apple Watch or compatible Bluetooth Low Energy (BLE) heart rate monitors.

Can Cardiogram connect to external heart rate sensors?

Yes, Cardiogram has wide BLE monitor compatibility. It can connect to external heart rate sensors from brands like Polar, Garmin, Wahoo, and other Bluetooth heart rate monitors.

What are heart rate zones in Cardiogram?

Cardiogram visualizes workout intensity instantly with color-coded HR zones, including Fitness, Fat Burn, Aerobic, Anaerobic, and Maximum Effort. This helps you optimize cardio sessions, endurance training, and performance improvement.

Is Cardiogram a medical device?

No, Cardiogram is not a medical device and does not diagnose, treat, or prevent medical conditions. Always consult a healthcare professional regarding health concerns.

How much does Cardiogram cost?

Cardiogram is a paid application. The current price is $3.99.

How often is Cardiogram updated?

The latest version of Cardiogram is 10.5, and it was last updated on March 30, 2026. This indicates a relatively frequent update schedule.