Do I need Premium to Track Sleep Stages and Score?

[AreaMann]

I just bought a Versa 4 after my Versa 2 died. I wore it one night and it did not give me sleep stages or a score.  Tracked heart rate and oxygen but no other health metrics. I can’t find any information that says whether this type of data is locked without a Premium subscription.  If I have to pay to see this data (it was free on the Versa 2), I’m going to have to send it back, which I don’t want to do.  Can anyone answer this?  Thanks!

[LZeeW]

@AreaMann   No, you don't need Premium to get sleep stages or a sleep score.  The most common reason for your missing data is that your Versa 4 couldn't record detailed heart rate data.  As a bit of an explanation, your daily heart rate graph shows an average heart rate over five minutes.  In reality, your Fitbit records your heart rate on a beat to beat basis, measuring in milliseconds.  You need the detailed heart rate data to calculate HRV and breathing rate, too.  If you aren't used to the infinity band on the Versa 4, you might be wearing it too loose.  Try adjusting the fit.

I think, but can't confirm that you might need three days of data to get your skin temperature variation, because of the new device.

[AreaMann]

Thank you so much!  I actually wore it pretty tight and it did give heart rate data all night.  I’ll see what it does tonight but thank you again for your quick and very thoughtful reply!