Cardiogram - HR Monitor

Cardiogram - HR Monitor

Private Heart Rate Tracker

11 ratings
13 reviews
$3.99

Details

  • Released
  • Updated

Features

Cardiogram - HR Monitor video #1 for iPhone
Cardiogram - HR Monitor screenshot #2 for iPhone
Cardiogram - HR Monitor screenshot #3 for iPhone
Cardiogram - HR Monitor screenshot #4 for iPhone
Cardiogram - HR Monitor screenshot #5 for iPhone
Cardiogram - HR Monitor screenshot #6 for iPhone
Cardiogram - HR Monitor screenshot #7 for iPhone
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

11.0

June 23, 2026

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.

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User reviews

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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Feedback

Should allow option to select activity as sleep

Response from developer

Thank you for your feedback and review. Will try to add it in the next updates.

Great simple App

Get 5 stars when integrate a custom activity. While sleep tracking I dont want to select one of the existing exercise modes.

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.