Just as Meitu, the insanely popular mobile app that 'anime-fies' your face, has gone viral in the Western world, so has security and privacy concerns over the amount of data it collects on its users. Some security researchers have noted that, for a frivolous photo editing app, it's asking for way too many permissions to access information on a user's phone. The app is also apparently sending data about its users to remote servers in China. Here's what you need to know.