Apple Heart Study

The Apple Heart Study app uses data from Apple Watch to identify irregular heart rhythms, including those from potentially serious heart conditions such as atrial fibrillation. Apple is conducting this research study in collaboration with Stanford Medicine to improve the technology used to detect and analyze irregular heart rhythms, like atrial fibrillation - a leading cause of stroke.

 We need You

Apple and Stanford Medicine are committed to making it easy for people to participate in medical research, because more data can lead to discoveries that save lives. Early detection of irregular heart rhythms may prevent more serious health issues.

Anyone 22 years or older who has an iPhone 5s or later, an Apple Watch Series 1 or later and who meet other study eligibility criteria can join other people from across the United States who are committed to heart health.  

Join the Study

It’s Easy



Download and install the
Apple Heart Study app

Enrollment is closed to new participants as of August 1, 2018.



Wear your Apple Watch 



If notified of an irregular heart rhythm, consult with a Study Telehealth Provider from American Well, who may ask you to wear an ePatch monitor for up to seven days. The ePatch monitor will be provided to you at no cost.