Just a heads up, There's a app called "tapatalk" that is fully supported and supports xenforo.
It requires a plugin to be installed on the webserver.
https://tapatalk.com/start-here.php
It now supports RSS feeds and Wordpress too.
The free mobile app runs on IOS and Android.
It might help generate revenue for the site, and keep the app users happy.
FWIW: I love the dynamic website and don't really need the app.
That said, I have a bunch of other sites I go to that I access via the tapatalk app. This way all my forums are in one single app, and I get updates from all of them in that single place without needing email updates to be sent to me.
No commercial affiliation. I'm just a happy tapatalk user.