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Cardiogram for Apple Watch

By Cardiogram, Inc.

This app is only available on the App Store for iOS devices.


Your Apple Watch measures your heart rate every five minutes—Cardiogram tells you what that data means. We help you understand health, sleep, stress, and fitness.

The Cardiogram native Watch app and complication shows you a graph of your heart rate in real time.

On your iPhone, you can get more details and historical trends:
• The Timeline tab shows your heart rate each day, with a detailed view for workouts that shows minutes in each heart rate zone, and a special interface to track spikes related to stress, diet, or exercise.
• The Daily Leaderboard lens 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 compatible with the built-in iPhone step tracker!
• The Metrics tab shows you how your resting heart rate, sleep, and move, exercise, and stand activity rings are trending over time.
• The new Habits tab 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.
• The "Me" tab lets you build a profile and share your health data with medical researchers, to 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.

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. Cardiogram is compatible with all Apple Watch models, including Apple Watch Series 1, Apple Watch Series 2, and Apple Watch Series 3. Cardiogram is free.

What's your heart telling you?

What's New in Version 2.8.11

Updates in Cardiogram 2.8.11:
• Minor update in syncing heart beats and workouts—data syncing is now slightly faster!
• Please email us at if you're seeing syncing problems. Thanks!


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Customer Reviews

Good except for bradycardia

This app is great especially if looking for high rhythms. If you have bradycardia and want to monitor that, it’s iffy. It doesn’t always choose the lowest rate in a minute. And there’s no low alert that I’ve seen. Another app showed 43 bpm and this one chose 52 for that low reading. It also will erase the low one if another higher one is found. Other apps do record lowest. One day of all day 50s readings recorded, but it has been inconsistent.

The graphs are nice, it’s also good to have research options too. Overall it’s a great app.

Sign in is broken

I use to love this app. I had been using it for about a year. Then today, my daughter wanted to do some heart rate experiments for her 1st grade Science project. So I let her wear my watch while the Watch app was continuously recording. She did a series of activities for an hour. But when I went to open the iOS app it won’t sign in. I keep getting an error saying my account exists but used a different sign in method. But I’ve never signed in with Facebook or Twitter so that can’t be right. I even tried resetting my password. But now the app just sits on the sign in page saying “creating account”. Now it looks like I need to find another way for my daughter to do her experiment. Thanks Cardiogram!

Never would I..

I’m someone who enjoys technology, the only reason i purchased the watch. To try and sum up the reason i love this app. I downloaded this app just to follow my heart patterns due to family history. I blacked out xmas eve ended up going to my pcp physician along with and EKG and my daily charts using this app further tests are being done but wow, i would have never thought my Dr world have asked do you track your heart rate on your apple watch.


Cardiogram for Apple Watch
View in iTunes
Offers Apple Watch App for iPhone
  • Free
  • Category: Health & Fitness
  • Updated:
  • Version: 2.8.11
  • Size: 55.1 MB
  • Apple Watch: Yes
  • Language: English
  • Seller:
Rated 12+ for the following:
  • Infrequent/Mild Medical/Treatment Information

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

Customer Ratings

Current Version:
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