BlueScanner lets you scan for Bluetooth devices that are nearby, challenging you to find as many as you can as part of a fun social game.
Every time BlueScanner finds a new device, its name is displayed on screen, and another point is added to your overall total. As you continue 'collecting' Bluetooth names, your experience points go up to improve your global ranking.
In the Stats section of BlueScanner you can see your total experience points, level, and the number of devices you have found. You can also see how you match up against other players, although it'll be tough to knock the overall leader off the top at the moment - at the time of writing they've found 778 million devices!
BlueScanner can make bus and train journeys more interesting, by allowing you to earn points for the game for just scanning fellow passenger's devices. Just remember that leaving Bluetooth turned on can quickly drain battery power.
If you're feeling like your phone's Bluetooth connection is being wasted, then give BlueScanner a try.