I found it myself, and the app STILL said “cold”
The app never helped me get any closer than about 54% , though I knew the Fitbit had to be in the house. We eventually found it in a recycling drawer on our own — not with the help of the app — and STILL, when I put the Fitbit right next to my iPad (the app), it said only about 50-something percent. So I’m not impressed; I so wanted it to work!