Opening the iTunes Store.If iTunes doesn't open, click the iTunes application icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To download the free app Cardiogram - Watch your Heart Rate by Cardiogram, Inc., get iTunes now.

Already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC

Cardiogram - Watch your Heart Rate

By Cardiogram, Inc.

Open iTunes to buy and download apps.


Your Apple Watch measures your heart rate more than 200 times each day. Cardiogram organizes heart rate, activity, and sleep data from the Health app and makes it meaningful and useful.

On your Apple Watch, the Cardiogram watchOS 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 and a special interface to track spikes related to stress, diet, or exercise.
• The Metrics tab shows you how your resting heart rate, activity, and sleep are trending over the last few weeks or months.
• And the new Habits tab lets you find a new healthy habit 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 to other users.

What's your heart telling you?

What's New in Version 2.0.4

Updates in Cardiogram 2.0.4:
• Fix Habits invite link for iOS 8 and older.

Updates in Cardiogram 2.0.3:
• Invited friends to join you on a Habit, and you can now ping your friends after completing the habit each day to help them stay on track!
• Updated Habits invite link. If your friend doesn't already have Cardiogram installed, the invite link will take him/her to the app store, and once Cardiogram opens, your friend will be added to your Habit automatically.

Updates in Cardiogram 2.0.2:
• Fixed one more issue with data refresh, due to a problem with HealthKit permissions when upgrading to iOS 10.1.
• If you're still seeing stale data after upgrading to 2.0.2, try restarting the app (double-click home button, find Cardiogram, and swipe up).
• Please email us if you're still having trouble with data sync: Thanks!

Updates in Cardiogram 2.0.1:
• Fixed bug where data would not refresh. If you've recently upgraded to iOS 10.1 and you're seeing stale data, please email us:
• Updated Cardiogram icon in the app store.
• Smoother transition when selecting a habit from the "All Habits" tab.

Updates in Cardiogram 2.0:

Habits. We all have health goals we're working towards, but it's hard to keep track and keep up each day when you don't have data to measure progress against. We think Cardiogram can help. The Habits tab is designed to help you improve health in 3 categories: Fitness, Sleep, and Stress. Each category offers a set of evidence-based Habits you can try for 14 days. Each day as you complete a Habit, you'll be rewarded with a checkmark to congratulate your daily progress. Plus, you can monitor how the Habit improves your key biometrics, such as resting heart rate and sleep quality, on a daily basis.

To make Habits more fun, invite your friends to join a Habit with you. Research has shown that one of the best ways to keep yourself on track towards a goal is to publicly announce your commitment and work towards it with a group of people with the same goal. You and your friends can keep each other accountable on a daily basis, and motivate each other by comparing your biometric results! So what are you waiting for? Go on, invite a few friends, and find a new habit you'll love!

Also included in Cardiogram 2.0:
• New sleep quality metrics: a) Sleep Duration, and b) Sleeping BPM.
• New and revamped profiles page.

If you have ideas for new Habits to add, we'd love to hear your thoughts! Email us at:


iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4
iPhone Screenshot 5
iPhone Screenshot 1
iPhone Screenshot 2

Customer Reviews

Well designed app, but it's inaccurate

The visuals are well designed, and I think it's a great idea. There aren't a ton of apps out there that take advantage of/use the data that gets collected by the Apple Watch. My issue with it, as with apps like Fitbit, is that they're trying to come up with some funky formula for resting heart rate. Instead of taking the universal definition - the lowest BPM during waking hours, while not moving - they seem to be trying to find an average or something. Either way, it's wrong. My RHR is far lower than what this app always tries to tell me.

What about supporting long term behaviors?

"Habits" is interesting. But habits are about starting something new. What about those who have been practicing long term behaviors such as daily meditation, yoga, exercise, etc. These folks probably will not see any change in heart metrics as such changes took place long before, but if they provided such information, possibly it would help the research study understand the data they are submitting.

Increases my frequency of healthy activities

I like the reminders offered each day and the ability to enter and track activity periods. These features have given me a little extra motivation to do things like go for a walk or do some Yoga, if only because I get to record the activity and feel a sense of accomplishment. My activity level per day has increased since getting this app.

Cardiogram - Watch your Heart Rate
View in iTunes
Offers Apple Watch App for iPhone
  • Free
  • Category: Health & Fitness
  • Updated:
  • Version: 2.0.4
  • Size: 42.5 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:
All Versions: