Apple has announced the Apple Watch Series 12 and Ultra 4 featuring an upgraded health tracking system that measures heart rate every five seconds and adds a new readiness score. The models also introduce Audio Intelligence with sound recognition, live rewind transcription, and Siri recaps while running on the new S11 chip (previously reported to include A20 Pro-derived components).

The new models share an upgraded heart rate monitor as the centerpiece of their health sensing system.
https://x.com/9to5mac/status/2097743046347493730
Audio Intelligence adds sound recognition and live transcription capabilities.
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