Is there a personal trainer that you can wear around your wrist, and possibly interface with a biometric chip inside your body that measures sugars/caloric inta

Is there a personal trainer that you can wear around your wrist, and possibly interface with a biometric chip inside your body that measures sugars/caloric intake and sends you automated feedback like: "Hey, you're overeating, is something wrong? Are you emotional eating?" -- or that charts and tracks every last ounce of calories burned, and can literally quantify the entire metabolic output of your body in a given day? What about one that can track which workouts actually keep you motivated longer, which diet foods you like better, just by watching your behavior? -- Nothing like this exists today, but it will, eventually. AI will be a lot like the AI in HER and it won't be very long of a wait, probably in 20 years or so..