jfruhlinger writes "Your smartphone can send texts, surf the Web, and update your Facebook page, so it stands to reason that it can cure acne too, right? Well, maybe not. Two companies that marketed acne-cure apps have settled with the FTC and have been forced to take the apps off the market. (Colored light can kill acne-causing bacteria, but needs to be much more powerful than what a smartphone screen can put out.) Almost 15,000 people bought the apps."