Sleep Stages isn't just for the Alta HR -- the new tracking feature is hitting all Fitbit devices with the PurePulse, so Charge 2 and Blaze owners will also receive the update. With Sleep Stages ...

although Fitbit could use a boost The Alta HR is 25 percent skinnier than the next smallest Fitbit with PurePulse, the Charge 2, which can be overly chunky for people with smaller wrists.

If this solution doesn't work, or if you don't have access to a charger, there are other ways to attempt to fix syncing and other Fitbit Alta issues. The simplest approach is to simply close the ...