Peek is a new iOS app that's a little like that children's game – but for big kids (known in some circles as "adults") who want to instantly share before-and-after shots with friends.
Begin by taking an initial photo to entice your audience (think of it like the setup, the before, the suspense shot). Then snap your second shot to cap it (the punch line, the after, or the conclusion). Peek shows your followers the first picture and lets them reveal the second by tapping the screen.
Peek is all about the element of surprise. Use it to improve your food pics (say, by showing that burger before and after you devoured it), or debut a drastic new haircut, or show how you look before and after an insane workout.
