I gave it another try.
I do not have this Xenforo community app in my App store search results. The Webadres xenforo.com leads me to the website for owners (pay or free demo) to start a new community. Its not for the users.
-> It still doesn’t work in the Netherlands on an Iphone/safari
About a different app (didn’t know where to put it). Thought it might be interesting for the moderators.
In the Netherlands they introduced an app where you can enter all you’re animals (dogs, pigs, ducks and even chickens) with some basic features like name, date of birth, father/mother...