Some Apple Watches have an electrocardiogram (ECG or EKG) built in. If your doctor wants you to use it—or you want to share the results of it with them—here’s what to do.
What Apple Watches Have an ECG?
The Apple Watch Series 4, Series 5, and Series 6 have a built-in ECG. The Apple Watch SE and Apple Watch Series 3, both of which are still available for sale as of early 2021, do not.
How to Take an ECG with Your Apple Watch
Before using the ECG app, you need to enable it in the Health app on your iPhone. If you haven’t already done so, open the “Health” app and tap “Set Up ECG app.”