Meet the iPrank Cracked Screen Sticker Pack. It’s better than some app that shows ads or a wallpaper that shows your icons on top of the spiderweb pattern instead of behind. It’s a set of 6 screen protectors that look like you’ve broken your screen: 2 for iPhone 5, 2 for iPhone 4, and 2 for iPad. Know what that means? You can prank six of your friends.