3 ms·Apple Watch's heart rate monitor is accurate to 5bpm 89-98% of the time4 points by brandonb 1y agobrandonb 1y agoNote that these results were measured on the third generation heart rate sensor (basically, 2020 models or later, minus the SE series).deleted 1y ago[deleted]chiph2o 1y agoInteresting, read somewhere Apple has positioned itself as a health care tech quietly over the years.