Do you really need an app to tell you you're not eating healthy? Nutrition and exercise aren't that hard; your body is able to let you know fairly easily when you're messing up, if not immediately at least over time. I have a very hard time believing that tracking your calories is going to significantly change your diet in the long term.

If you're overweight, you don't need to check on your smart-watch to know it. If you're drinking too much, you probably know about it already. And if you refuse to recognize it, I'm not sure numbers will help you. You don't need an AI to see that if you're 5 times a week at the pub for an average of 2 hours, you may have a problem.

There seems to be a strong belief that these things are hard to evaluate on your own, that the body is something mystical that can't seem to have any obvious logic. Yet we refuse to listen to the very basic, and reliable, signals our bodies broadcast.

Now if you're diabetic, or developing an illness, having a silent device continuously testing your blood would help. But we're far from it.