The Apple Watch may be able to alert wearers to heart palpitations, but Google LLC’s Pixel Watch 3 can now detect when a user’s heart stops – and call emergency services. The pulse detection featured received clearance from the U.S. FDA on Feb. 26 and Google plans to make it available on its Pixel Watch 3 starting in March. Pulse detection is already available for watches sold in the U.K. and EU.