Metricization: Quantifying Beauty

Beauty apps are becoming more and more miraculously high-tech, but also more and more invasive. You might feel OK about an app that gives your face a "beauty rating", but what if the app started to recommend cosmetic surgery procedures? Or how about a selfie enhancement app that doesn't just get rid of minor skin blemishes, but actually alters the shape of your face to suit and algorithmically determined ideal?