Nudging to prevent losing your phone

The Ciago iAlert and Cobra Tag are Bluetooth keychain fobs that communicate with your iPhone or Android phone. Once you’re 30 feet away from the phone, the keychain starts beeping, as though to say, “You’re leaving your $200 phone behind, you idiot!” It works the other way, too; the phone beeps if you leave your keys behind.

(HT: Pogie Awards NYT)