This seems like useless spam and pseudo-AI to me, in addition they harvest email addresses and subscribe you to their newsletter against your will. Avoid.
So far as I can tell they ask a number of questions that get weakly gendered answers, put them together with a logistic regression model and can make a reasonable guess.
They do a pretty good job of explaining how it works.
I scored 75% male which is about what I'd expect because (1) I am male, but (2) I score high on some "female" characteristics such as aesthetic appreciation. I like some girly things and sometimes end up in situations a bit like a harem anime.
Men and women have different experiences. Shortly into becoming a parent I went to a party where one child asked me to read a book and next thing I know I had 10 children dogpiled on top of me which I was a bit shocked by. I think someone who grew up female would have more opportunities to take care of kids and would have had this experience that I had around age 32 at age 12.
One viewpoint is that there are "things men are good at" and "things women are good at" and the ideal person would be good at both, like this fictional character
My answers are different than they would have been even a year ago because I consciously made an effort to change behaviors that were problematic or limiting to me. (e.g. struggling to control anger I learned I could flood myself with feelings of sadness. If I couldn't find any reason to be sad I would go to the war memorial and read the names. I learned later that this was something Chinese people knew about a long time ago.)
