Apple releases a study that evaluates the heart-rate sensing accuracy of the Apple Watch Series 12 and Apple Watch Ultra 4, tying the result to the devices’ Health Sensing System. Apple says the system delivers the “most accurate heart rate sensing in a wearable,” and it presents evidence by comparing measurements against other leading categories of consumer wearables.
Across outlets, the reporting focuses on how Apple frames the comparison and what the study emphasizes. AppleInsider notes that the results depend on specific testing conditions and highlights details such as the watch measuring heart rate every five seconds. 9to5Mac similarly reports that Apple backs up its claim with published testing against rivals, including smart rings and fitness bands, showing how close competing devices can be under those circumstances. Both sources describe Apple’s study as a direct comparison rather than an evaluation of overall health metrics, and they stress that the new sensing approach is central to the company’s accuracy claim.
