Are you taking about the bodybugg?
It is owned by body media but runs different firmware than the bmf. It does not have the sleep function like the bmf. Neither run on live strong, but bmf has a place to enter the days calories in one lump sum where bb does not.
The Bluetooth versions, both bb and bmf do not sync with the watch. Check phone compatabitlity befoe you get that version.
Both require a subscription in order to off load the data from the unit. Bmf also at this time requires a plug in to the computer to get all of the data including sleep data regardless of the Bluetooth or not.
Btw, I like the bmf better. I had a bb and am happy to not have the java issues the bb has, I like the food loggin g better and I like the sleep function too. Oh and bmf has vigorous and moderate activity where the bb does not.
Hope this helps....
If your dog is fat, you aren't getting enough exercise