The Apple Heart Study app is an innovative research study that uses data from Apple Watch to identify irregular heart rhythms, including those from potentially serious heart conditions such as atrial fibrillation (AFib). This study is being conducted in collaboration with Stanford Medicine to accelerate discovery in heart science.

- AFib is one of the most common forms of irregular heart rhythm. It can lead to blood clots or heart failure and is a leading cause of stroke. AFib affects tens of millions of people — but many of those people don’t experience symptoms, so it often goes undiagnosed.

- The Apple Heart Study uses an app designed to notify participants if an irregular heart rhythm is observed.

- The app will passively monitor your heart rate along with your heart rhythm. If an irregular heart rhythm is observed, the app will notify you.

- After the notification, you’ll receive a free video consultation on your iPhone with the study’s medical professionals for further analysis.

- The video consultation connects you with a board-certified, licensed primary care provider from American Well* - 24 hours a day, 7 days a week.

- In some cases, the doctor may recommend a BioTelemetry electrocardiogram (ECG) patch for additional monitoring. The patch will be mailed to you at no cost and should be worn for seven days. The ECG data gathered over this period will be used to determine whether AFib or another type of irregular heart rhythm is present.

- Participation in the Apple Heart Study is voluntary. After you download the app, you’ll be asked to give your consent for participation. The heart rate sensor data you provide over time will be collected by Stanford Medicine and Apple for research analysis. Apple will not have access to any information that can directly identify you.


- Requires Apple Watch Series 1 (Fall 2016 model) or later with watchOS 4 and later. The Apple Heart Study does not support the original Apple Watch.
- iPhone 5s or later with iOS 11 or later
- You must be a U.S. resident, 22 years or older, and meet other study eligibility criteria as described in the Apple Heart Study app
- You must provide your consent to participate in the study

*Doctors provided by American Well’s clinical partner, Online Care Group.

What's New

Version 1.1

This update includes bug fixes and other improvements.

Ratings and Reviews

3.2 out of 5

908 Ratings
908 Ratings

All went smoothly with sign up...

Brad Hanes

I’ve bought, and still own all three I watches to date.... iWatch 1, 2, & currently three. I had, “zero” issues downloading the heart study app into my iWatch 3. I’m a huge Apple fan and I’m so excited about future in the health field. It’s just amazing that we will all be able to wear this watch on our wrist one day and monitor so many body functions. I look forward to the day were you can download the info Into your doctors computers. I’m betting one day our doctors will receive real time health info from any patient of theirs who wears an Apple iWatch. Can you imagine your doctor calling you and saying I need to see you as I don’t like the readings your iWatch is sending me about some of your body functions. Better yet how about the day were your doctor is notified by your iWatch that you could be having a stroke and the iWatch is able to administer medication from an onboard reservoir. Don’t laugh people as this is what our future will likely be and Apple is aggressively pursuing health issues with its devices, anyway the app has worked well for me so far

App does exactly what it’s supposed to do.


I read many of the one star ratings to determine if I should download this app. In my opinion most are not valid with regard to the app itself.
I am a 61 year old man who just bought a series 3 watch. I downloaded the app followed the instructions and was immediately accepted into the study. At this point the only requirement is for you to wear the watch. have no known heart issues.
The app tells you how many days you’ve been in the study and how many heart rhythm data contributions you’ve made. It is also supposed to alert you if an abnormal rhythm is detected.
If a problem is detected you have the option to speak with a doctor from the study. You can also simply withdraw from the study with a simple keystroke in the app. I plan to stay in the study as long as they want me.

It really worked!!


Like many I was wondering if it really did anything with data, if you would be notified if something seemed irregular. Received a notice the other night stating I should call a doctor due to heart rhythm variation. The notice comes with a button to call their on call doctor. Was told I should go to the ER, didn’t tell me what kind of arrhythmia was suspected. I called on call doc at Cardiology clinic and was told the same thing. As I was leaving for ER heart study doctor called me to make sure I went. Only complaint was I was not told what arrhythmia detected. Ended up the visit was justified. I had several issues. So those of you wondering if there really is a person who receives notice of irregular rhythm and if you will be contacted. In my case it worked as advertised except for notice to be able to communicate info to doctor here.


Apple Inc.
26.7 MB
Health & Fitness
Requires iOS 11.0 or later. Compatible with iPhone.
Age Rating
You must be at least 17 years old to download this app.
Infrequent/Mild Alcohol, Tobacco, or Drug Use or References
Frequent/Intense Medical/Treatment Information
© 2017 Apple Inc


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