For what it’s worth, in my experience there is a wide delta in accuracy between bad fitbit-style sleep trackerse and good fiftbit-style trackers.
I do not know if this study used good or bad devices.
For what it’s worth, in my experience there is a wide delta in accuracy between bad fitbit-style sleep trackerse and good fiftbit-style trackers.
I do not know if this study used good or bad devices.