My wife lost her FitBit so I got this since I knew it was still in the house (we were getting low battery emails from the app, so it was connected to her phone). Took me about 10 minutes to find it in the closet on the shelf under clothes. It actually labeled it FLEX, so it was easy. It was finding MANY Bluetooth devises in my house, but the FitBit was the only one with a name. I recommend this app!!
JonnyBennett about Bluetooth Smart Scanner