Apple Watch Now Reads Heart Data Every Five Seconds, All Day
The redesigned Health App adds a Health Age score, perimenopause tracking, and $119 lab panels sold through Quest Diagnostics later this year.
- watchOS 27 launches September 14, 2026, compatible with Apple Watch Series 9 and later.
- New sensors measure heart rate every five seconds and HRV every five minutes.
- Quest Diagnostics will sell 50-plus biomarker panels inside the Health app for $119.
Why it matters: The company that measures a pulse every five seconds now sells the blood test to interpret it.