Die With Me is not your typical messaging app. You can only use it when your phone has less than 5 percent battery life. And it only lets you chat up random strangers whose phones are also dying. And you thought there would never be a Great App Idea ever again. Ha! First, this is not an April Fool's joke. It's a real app for iOS and Android. Now that you know Jimmy Kimmel's not punking us all, you probably want to know why.