Apple Launches $399 Watch Series 12 and Ultra 4 With 5-Second Heart Tracking
Updated
Updated · GQ · Oct 2
Apple Launches $399 Watch Series 12 and Ultra 4 With 5-Second Heart Tracking
3 articles · Updated · GQ · Oct 2
Summary
Apple unveiled Watch Series 12 and Ultra 4 with a redesigned heart-rate sensor that measures every five seconds, shifting the lineup further toward health monitoring.
The new watches add a personalized Readiness score built from sleep, recent workouts, blood oxygen and heart-rate variability, while a redesigned Health app surfaces those insights more clearly on iPhone.
Apple says the upgraded sensor array uses larger, more efficient LEDs and a denser photodiode layout; the company also cited a recent study ranking its heart tracking as the most accurate among wearables.
The push comes as Oura and Whoop gain traction with screenless, health-first devices, pressuring Apple to deepen wellness features without changing the Watch’s long-standing design.