If I use API "/1/user/-/activities/heart/date/<<date>>/1d.json" I get info about the minutes in heart rate zones of that full day.
I just wanted to know if the device is worn the whole day, so based on the API documentation I figured out that I would not need intraday access (to look at the heart rate values), but could just count how many minutes of a full day were missing from all heart rate zones combined (because there is a minimum HR) in the output of the endpoint mentioned above.
To my surprise, I noticed that the sum of minutes in all zones is always a full day, even if I did not wear the Fitbit in the evening and during the night.
Could you (the Fitbit API maintainers) please correct the minimum HR of the 'out of range' to 0 if it works that way... it does not make sense to count 0 or unknown values into that range if the minimum is 30!
An alternate fix, which would make most sense, is to actually not count 0/unknown values in that HR zone.
