India, Dec. 5 -- Apple Watch is often touted as a powerful health-tracking device. Now, taking another step in that direction, Apple has finally brought the Hypertension Notification feature to users in India, which alerts users if chronic high blood pressure or hypertension is detected. Apple says hypertension is the leading risk factor for heart attack, stroke, and kidney disease, and it affects over 1.3 billion adults world over, and it is often left undiagnosed because it comes with no symptoms at all.

Hypertension Notification on Apple Watch uses hardware like the Optical Heart Sensor to check how a user's blood vessels respond to the beats of a person's heart. Then the algorithm works in the background to review the data over a 30-...