“Virtually perfect” is an amazing endorsement!
Any peer-reviewed studies in leading journals and by veteran medical researchers at well-regarded universities or medical centers that confirm that?!
It'd be reassuring. From Apple's own spec sheets, they had gotten up to the third generation heart sensor, so there must have been improvements. Or, did they go from “almost perfect” to “virtually perfect”?! 😁 Just teasing, but it would be interesting to see what professional medical researchers have concluded.
Note as well that the answer must depend upon which indicator one is considering — snapshot heart rate, the day's resting HR (which seems grossly off and depends on the “standard” or formula for calculating it), irregular HR detection, low or high HR, and, the biggie, ECG and atrial fibrillation.
I’m skeptical that the Watch is providing “virtually perfect” measures in *each* of those areas, but would be happy to be disproven. That's especially true because the watch's own resting heart rate graphs show how off the reported resting HR is — the bulk of the measured values, even when resting, lie above, often well above, the so-called resting rate! So, that one is definitely not “virtually perfect”.
I'd like to know, as the OP does, whether Apple is describing the AW 10's sensor as new or 4th generation!
Just checked. It's listed as “Third-generation optical heart sensor” just as the Apple Watch 6 and later models have!
Compare specs for the latest Apple Watch models: Apple Watch Ultra 2, Apple Watch Series 10, and Apple Watch SE.
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