The heart rate updates constantly. On the Fitbit itself, it will show you that.
The app also shows you an update, but you have to keep going to it. That's the
only advantage to the watch that I know of. I use my Fitbit for heart rate as
well. But I don't get as many options in the app, as you
Does anyone know if there is a way to have your heart rate updated
frequently to make sure you are in the zone that you want for cardio
workouts?
Also, the Charge 2 seems very accurate as far as wearing it on your wrist
while on a treadmill.
Lynda
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