Apple Heart Study

To accelerate discovery in heart science, we’ve created an innovative research study.

It uses an app designed to notify participants if an irregular heart rhythm is observed.

Early diagnosis and treatment may prevent serious heart complications, including strokes.

Downloading the app is simple. And the study is open to people across the United States.

The more people who get involved, the greater the potential benefit.

Your participation is important. So we made it easy.

Joining the study is as simple as downloading an app. The study is open to any U.S. resident who is 22 years or older, uses an iPhone 5s or later with iOS 11 and an Apple Watch Series 1 or later with watchOS 4, and meets other study eligibility criteria.

Getting started

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.

Learn more about Stanford Medicine


The Apple Heart Study app will passively monitor your heart rate along with your heart rhythm. If an irregular heart rhythm — also known as an arrhythmia — is identified,1 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.

Study doctor consultations

The video consultation connects you with a board-certified, licensed primary care provider through American Well2 — 24 hours a day, 7 days a week.

Learn more about American Well

BioTelemetry ECG Patch

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 atrial fibrillation (AFib) or another type of irregular heart rhythm is present.

Learn more about the BioTelemetry ECG Patch

Why we’re studying irregular heart rhythms.

AFib is one of the most common forms of serious arrhythmia. 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.

5x Increased risk of stroke from AFib3
750K Hospitalizations due to AFib each year in the U.S.4

Your personal data stays secure.

Apple will not have access to any information that can directly identify you. You may receive data from wearing the BioTelemetry ECG patch, and summary notes after doctor consultations. It’s completely up to you whether to share these reports with your primary care physician.5

Download the Apple Heart Study app.

Go to the App Store