Teens already have plenty of tools to hide mobile communication from their parents, but now there’s another trick in their arsenal: BEEP is an app with an alert tone that only young people can hear.

Teens already have plenty of tools to hide mobile communication from their parents, but now there’s another trick in their arsenal: BEEP is an app with an alert tone that only young people can hear. When users receive a message, the ringtone that sounds is a high frequency that most older people cannot hear and most teens can—which means that they could use their phones in places that they are usually banned. (iDigital)