jfruhlinger wrote Your smartphone can send texts, surf the web and update your Facebook page, so of course it can also cure acne, right? Well, maybe not. Two companies which marketed acne cure applications are installed with the FTC and have been forced to take applications market. (colored light can kill bacteria that cause acne, but it must be much more powerful than what a smartphone screen can extinguish.) Nearly 15,000 people have purchased applications.