Apple’s update to Watch OS 1.0.1 was intended to improve the performance of several fitness-related functions, but also appears to have introduced a bug. Instead of the Apple Watch recording your heart rate every ten minutes, many users – including myself – are seeing large gaps in the data.
My readings for yesterday afternoon and evening, shown above, contain four gaps of more than an hour. Two of these gaps span times when I was cycling, when the data would have been most relevant. Users in an Apple Support Communities thread (via EverythingCafe) are reporting the same thing … expand full story