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.


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 had an iPhone 5s or later, an Apple Watch Series 1 or later and who met other study eligibility criteria could join other people from across the United States who were committed to heart health. 

More information can be found on