I use a fitbit. When I found the S Health thingy, I thought I would give it a shot. I have been using the phone as a pedometer for a few days now. The phone is always short of what the fitbit says. I am opting to believe the Fitbit, but it makes me wonder which is actually correct. The Fitbit also syncs with the S4, so I'm really not concerned about the S Health accessories. One would think that they would be available with the launch of the device though.