If "Hello, I'm your health coach" came up on my phone I'd probably throw it in the bath out of pure fear!
Do people actually believe in this stuff? Surely no-one is so gullible?
I'm all for objective health data being routinely measured/estimated by Apple Watch or another device (I measure my blood pressure and weight once a week, have done for at least 10 years), but the variability between different individuals is so great that there is no way that machine learning (ML, please lets not call it intelligence) can provide anything but an average assessment for any one person.
Perhaps one day, when/if we fully understand the workings of the human body, including all the diverse implications of a person's DNA, then ML can provide something useful.
Until then, I'll rely on common-sense interpretation of the data, and my doctor!