It's called Ignore No More. And when a parent calls their kid and the kid doesn't answer, the app locks their phone and only gives them two options: Call their parent back or call 911. So they can't text, play games, or use apps until they call their parents back and get the unlock code. Ignore No More costs $1.99 but it's only available for Android phones . . . Apple doesn't allow apps to lock up the phone the way this does.