I have an Apple Watch and iPhone and use all the health tracking stuff. I’m a little bit suspicious of the accuracy of sleep tracking, but so far I haven’t had

I have an Apple Watch and iPhone and use all the health tracking stuff. I’m a little bit suspicious of the accuracy of sleep tracking, but so far I haven’t had any experiences to suggest that it’s not reasonably accurate. And there’s no reason to believe that heart rate and step counting isn’t extremely accurate—seems fairly trivial to measure.