What a waste!
The app will only tell you what type of device it "hears" but cant tell you anything to be sure it is your Fitbit. I just spent 45 minutes tracking a signal but never found it. The right Fitbit was in my pants cuff the whole time. It had stopped talking to my iPhone and needed to be "reset". So bad on Fitbit for flakey devices and double bad on this stupid program for not giving a clue about which device is which. Apple Watch 2 and I can trash this junk.
Embers Grandfather about
Find Your Fitbit - Super Fast!, v2.1