Apparently Leonardo Da Vinci laid down rules for the ideal face shape and pop-psychologists have since used algorithms to construct profiles for age, emotions and personality based on variances from the 'perfect face'... It's a load of tosh, of course, but here's a new UWP app that brings all this together.
Use of advanced algorithms for Microsoft image processing.
Definition of sex, age, emotions from photography.
Determination of the ideal face proportions by the method of Leonardo Da Vinci (PRO).
Find similar photos (PRO)
Definition of a psychological portrait from a photograph (experimentally) (PRO).
Upgraded to the 'pro' version, here's PerfectFace UWP in action on my Lumia 950 XL:
62.8 years old???!! How dare it! Take all this with a pinch of salt, of course, same goes for the 'psychological picture' on the right here. Complete rubbish, complete with typos and made-up words. Pah!
The 'theory' - face shapes may be a 'thing', but they vary massively from culture to culture and have zero to do with personality, in my experience; (right) a search function for people who 'look like you' is an interesting idea, but hadn't found anyone else like me in 15 minutes of phone screen-on time, so I gave up.
You can grab this in the Store here, though most of it doesn't work without the IAP - which is why I took the hit for you, above! Don't waste your own money.