I think that this is doable for most of the normal population (and likely not novel (which does not diminish its value)) with public private crypto and some authority (eg government issued ids having keys like Portugal) and then using those to authenticate to a service that allows specifically what you want to share. So normally you’d only ever share say age or something

Leuk, dank je

You’re welcome. You should also try without the app by setting it to something like dns.adguard-dns.com if the app is only a trial!

This sounds interesting. Do you have sources for these studies and models?

Just fyi if you want to block ads on your phone you can go to your WIFI settings and set DNS to the AdGuard website or some similar service. Google is your friend for step by step guides