Apple Watch Series 4 is getting the hotly-anticipated ECG feature today. The ECG app will appear for customers using Apple Watch in the United States, after updating to watchOS 5.1.2 (releasing later today). The 5.1.2 update will also include irregular heart rate notifications for Apple Watch Series 1 through Series 4.
To take an ECG, users simply place their finger on the digital crown and wait for 30 seconds whilst the Watch scans the electrical impulses in your finger. The announcement was tipped off by The Verge, who appeared to have published an embargoed post prematurely.
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