Draw a dog. That's it. Somehow, you can't. Purupaint is a drawing app that actively works against you. Your lines shake. They overshoot. They arrive a little late. The harder you try to draw straight, the worse it gets. There is no eraser. You get one undo. Whatever comes out, you keep. ■ A new prompt every day ■ Share the wreckage ■ Good for - Killing five minutes - Drawing without caring how bad you are - Making someone laugh