How to sell your Fitbit
if it's time to say goodbye to your fitness tracker, here's what you should do before selling a fitbit.Fitbit Charge 4 is the antidote to chunky fitness watches
fitbit's new charge 4 keeps the sleek design of its predecessor, but steps up its fitness game with gps and heart rate alerts.Fitbit Charge 4 adds GPS but doesn't work with third-party apps
the updated tracker is fitbit's first gps wearable since the ionic, and is similar to the current charge 3.