Your heart beats over 102,000 times per day—Cardiogram tells you what that data means. We help you understand health, sleep, stress, and fitness.

The iPhone app is compatible with Apple Watch, Fitbit, Garmin, and Wear OS by Google devices with a heart rate sensor. The Cardiogram app for Apple Watch shows you a graph of your heart rate in real time, on your wrist.

Open the phone app to get more details and historical trends:
• The Timeline tab shows your heart rate each day, with a detailed view for workouts for minutes in each heart rate zone, and a special interface to track spikes related to stress, diet, or exercise.
• The Daily Leaderboard in the Timeline tab lets you compete steps and activity levels with your friends. You can even invite friends who don't own an Apple Watch—this feature is also compatible with the built-in iPhone step tracker.
• Metrics shows you how your resting heart rate, sleep, and move, exercise, and stand activity rings are trending over time.
• Habits lets you find a new healthy habit or activity you'll love, invite a friend to share metrics, and optimize your overall health and fitness.
• You can also build a profile to share health data with medical researchers and contribute to studies on abnormal heart rhythms like atrial fibrillation, heart failure, and more. Note: Cardiogram is not a medical device and is currently for research purposes only.

For Apple Watch users, Cardiogram displays data from the Health app, including heart rate, steps, Apple Watch activity rings, and sleep, in chart or graph format, and lets you compare with other users and compete with your friends. For Fitbit, Garmin, and wearOS by Google devices, Cardiogram receives data directly from the respective manufacturer.

Cardiogram is compatible with many devices with a heart rate sensor, including Apple Watch (series 1-4), Fitbit (Charge, Versa, Ionic, Alta HR, Inspire HR, and more) Garmin (fēnix, Forerunner, and vívo series, and more), and wear OS by Google (Fossil, Ticwatch, Moto, LG, Misfit, Huawei, and more).

Best of all, these core features are free!

Finally, if you’re looking for advanced sharing, you can subscribe to Cardiogram Premium, which gives you access to:
• Share with Family: allow up to 2 family members to remotely monitor your Cardiogram data and receive insights about your health. This is helpful for keeping an extra eye on your loved one.
• Share with Doctor: export your Cardiogram data into a PDF that you can print out and show your doctor.
• Premium Support: if you have any questions or issues with the Cardiogram app, your support requests will be prioritized and we'll respond to you within 24 hrs.

Subscription Info:
• Payment will be charged to iTunes Account at confirmation of purchase.
• Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period.
• Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal.
• Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase.
• Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription.

Pricing options:
• 1-month subscription: $14.99 / mth.
• 6-month subscription: $69.99 ($11.67 / mth).
• 12-month subscription: $99.99 ($8.33 / mth).

Terms of Service:
Privacy Policy:

What’s New

Version 3.1.0

Bug fixes!

Ratings and Reviews

4.1 out of 5
207 Ratings

207 Ratings

Hagsishakahd ,

Seems to have really improved from a year ago

When I first got this app back in December 2017, I wasn't impressed. I think almost all the negative reviews on here are from around then. But just tried it again and it now gives me continuous HR for almost full 12 hour day on Series 3 watch before draining the battery (fine for my needs), and doesn't log the monitoring as a workout which most other apps do in order to get continuous HR. Just checked the main app on the phone and it gives lots of extra insights aboht your stats compare to average user of the app. That sealed it for me and pushed me to actually write a review, which I rarely do. Great app and really happy with it!

Deeply veined ,

It becomes somewhat of an obsession, but in a good way

Just like the heart app on the Apple Watch, this app has found me become very much more engaged with what my heart is up to on a daily and weekly basis. It adds extra layers of info to my burgeoning exercise routines and it’s now a personal challenge to keep lowering my resting heart rate. It’s great when you can relate your daily activities to the peaks and troughs of the heart rate chart. Had shot of espresso? Let’s see what that does. How much did I peak during that bike ride? Maybe I can push a bit harder on tomorrow’s commute. I love this app and I am sure it will only improve with time. I also feel suitably virtuous to be a participant in their worldwide heart health study.

Edlongnz ,

One of the best apps on AppStore

I have cardiomyopathy and Irregular heart rhythm and had a cardiac arrest 4 years ago, lucky my Implanted defibrillator kick started my heart after 5 attempts As the technology has improved with the likes of the Apple Watch apps like Cardiogram have been a great help. Although my ICD monitors my heart and the information is automatically downloaded and sent to my Cardiologist I don’t have access to this data so Cardiogram gives me a very accurate overview of what my heart is up to. Highly recommended


Cardiogram Inc.
80.1 MB
Health & Fitness

Requires iOS 9.3 or later. Compatible with iPhone and iPod touch.



Age Rating
Rated 12+ for the following:
Infrequent/Mild Medical/Treatment Information
© 2019 Cardiogram Inc
In-App Purchases
  1. Premium (1 month, 75% off) £3.49
  2. Premium (12 month, 75% off) £22.99
  3. Cardiogram Premium (1 month) £14.49


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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