Google is rolling out Pixel Watch 3's 'loss of pulse detection' feature in the US

Google has started rolling out the loss of pulse detection feature for Pixel Watch 3 devices in the US. The feature does exactly what it describes: It checks for your pulse when the watch is on your wrist and will call emergency services if it determines that your pulse has stopped. It debuted in several European countries last year when the watch launched, but it didn't get approval from the US Food and Drug Administration until February this year. 

The feature uses concurrent passive algorithms to check for the presence of a pulse at the rate of once a second. If it detects the absence of a pulse, active sensors kick in to check for signals that could indicate false detections, such as if you...