Apple Debuts Re-architected Health Sensing System in Watch Series 12
AI-generated image · US National Wire
The tech giant claims its new hardware and S11 chip deliver the most accurate heart rate sensing of any wearable.
Apple has unveiled the Watch Series 12 and Ultra 4, featuring a re-architected "Health Sensing System" and the S11 chip. According to reporting from Ars Technica, Apple claims these devices offer the most accurate heart rate sensing in any wearable, citing a study conducted on a diverse group of more than 1,000 participants.
The hardware overhaul includes a larger electrode surface area for improved skin contact and redesigned photodiodes arranged in a ring. Engadget notes that the new model features a ring of 12 lights, a departure from the four-LED diamond layout found in the Series 11. Ars Technica reports that the green LEDs are larger and more power-efficient, enabling heart rate measurements every five seconds.
These hardware updates allow for significantly higher sampling rates. Apple states that heart rate variability (HRV) can now be measured up to 24 times more frequently than previous models. Engadget reports that HRV is now measured as often as every five minutes, compared to the previous interval of every two to four hours.
This data feeds into several new software features:
* **Readiness Scores:** A daily metric from 0 to 10 that analyzes sleep, vitals, training load, and activity. * **Vitals App:** Now includes recovery HRV measurements compared against a personal baseline and a new daytime vitals view. * **Health App Update:** A redesigned interface coming later this year that includes a "Health Age" score and a Longevity tab.
Additionally, Ars Technica reports that users can now purchase lab tests for over 50 biomarkers for $119 through the Health app, available at approximately 2,000 Quest Diagnostics locations in the U.S.