Instead of merely adding data to a reflection of your self, it uses cameras, microphones, virtual avatars, and deepfake technology to show you as you are, as you’d like to be, or as you don’t want to become. Conversational AI engages you in dialog with your digital twin, for information, self-motivation, or even cognitive behavioral therapy. At scale, the device could to to psychology what gene sequencing machines did to genomics: turn a largely qualitative field with low reproducibility into a quantitative, predictive science and engineering discipline.