How to identify a site visitor by gender and age without registration?

Question

Google Analytics

Interested in the API of various external systems where you can get the gender and age of a website visitor. Share your experience
Is it possible to do this on the basis of Yandex Metrika or Google Analytics in real-time? It is important for us to understand at the moment age and gender

Answer 1

You make a segment in the metrics or analytics by gender and/or age
. Then you set up ads based on it. All
Regular retargeting by segments.

Answer 2

as far as I know, there are paid services that can, with some degree of probability, tell demographics, mainly by analyzing the pages visited by the user on other sites. but this is not from Google and not from Yandex, mostly unknown or little-known companies in narrow circles.
I will not advertise anyone - google.

Answer 3

I already wrote: a question about Kodak and four answers