Apple's long-awaited ECG app is coming to Apple Watch Series 4 today as a free update. With it, you can take a reading of your heart's rhythm using the electrodes in the Series 4 to check for irregularities.
Additionally, watchOS 5.1.2 includes onboard notifications when a heart rate reading determines an irregularity. Through normal heart rate tracking, Apple Watch Series 1 through Series 4 will also check for signs if irregular heart rhythm that could be related to AFib and alert you with a notification if it detects five irregular heartbeats across 65 minutes.
Apple notes that AFib, or atrial fibrillation, is one of the most common forms of irregular heart rhythm.
Apple performed a clinical study of about 600 participants to confirm Apple Watch Series 4's ability to successfully read heart rhythm.
The ECG app and irregular heart rhythm notification feature will roll out across Apple Watch through the watchOS 5.1.2 update today.
Once updated, you'll be taken through an onscreen setup that will detail what the features can and can't do, how to interpret your results, and instructions on how to seek help if you're feeling symptoms that require medical attention.
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Lory is a renaissance woman, writing news, reviews, and how-to guides for iMore. She also fancies herself a bit of a rock star in her town and spends too much time reading comic books. If she's not typing away at her keyboard, you can probably find her at Disneyland or watching Star Wars (or both).