Readiness score is high but my sleep score has gone down drastically.

[Jan871]

Readiness score is high but my sleep score has gone down drastically.
I don’t know what’s going on with my sleep schedule since end of august 2025.

its very worrying, is it me or my Fitbit.?

[RiekoC]

Hello @Jan871 

There was a change to the sleep algorithm that was announced in the Android & iOS app forums. Users have reported lower sleep scores as a result of the algorithm change. 

If you haven't made any big changes to your sleep schedule, I'm wondering if this is what's affect affecting your sleep score. Although my sleep scores didn't seem to be affected as much by the algorithm change, the app definitely showed less sleep hours and more awake time. 

[Jan871]

Hi
I haven’t changed anything, but not had scores so low as this before, I am
going to pu on my husband his Fitbit is a charge 4 and see any difference.
Thank you