Kyle Kucharski/ZDNETThe Pixel Watch 3 is getting a first-of-its-kind, potentially life-saving feature. Also: My new favorite Android smartwatch outperforms Google and Samsung in a crucial wayIn a blog post today, Google announced that it had received FDA clearance for its Loss of Pulse Detection feature. Tracking your heartbeatThe feature works by tracking your heartbeat. If your heart stops beating — due to cardiac arrest, respiratory or circulatory failure, overdose, or poisoning — your watch will automatically turn on more accurate infrared LEDs and look for motion data. If the watch determines you’re not responsive, it will start a countdown and audio alarm. If you still don’t respond, the watch will place a call to emergency services using your LTE or phone connection, inform them that you don’t have a pulse, and share your location. Also: The best Android smartwatchesGoogle says the watch will be able to tell the difference between an actual cardiac event and the user simply removing the watch. Safety features like fall detection and crash detection aren’t new, but they aren’t at the level of this one (which is why it needed FDA clearance first). Other watches have heartbeat tracking, but they track much less frequently than the Pixel 3. The Apple Watch, for example, tracks heart rate every 3 to 7 minutes by default. More