When the United States Food and Drug Administration cleared the Apple Watch’s Hypertension Notification Feature last year, some saw it as a turning point in the fight against one of the leading causes of cardiac disease. Rather than booking a doctor’s appointment and strapping a bulging cuff around one’s arm, users could instead receive passive hypertension alerts from the watch’s optical sensors to track blood flow patterns. Watch wearers who were previously unaware that they had signs of this ever-common “silent killer” would receive an alert advising them to seek…
