3 ms·
> virtually all "sleep trackers" are just movement trackers This has been false since March 2016 when Fitbit introduced sleep stage analysis based on heart rat
by brlewis 7y ago
> virtually all "sleep trackers" are just movement trackers
This has been false since March 2016 when Fitbit introduced sleep stage analysis based on heart rate variability. I work for Fitbit but don't speak for Fitbit. Check my comment history for a link to a help article with details.