FaceTune’s success comes down to the way it makes it child’s play to alter images with far more precision than Snapchat filters but less complexity than professional editing tools like Photoshop.

All too often, however, FaceTune users go overboard, smoothing their selfies into amorphous avatars or slimming their bodies to the point of anatomical impossibility.

Overzealous FaceTuning is so widespread that recently celebrity model Chrissy Tiegen weighed in: “I don’t know what real skin looks like any more.”