While the website has some responsiveness (that's the word we in the webdev biz to describe UI adapting to screen sizes) there actually is a plan to make a mobile app for the site! It's a bit in the future so I wouldn't hold your breath. There are some hurdles needed to get publishing arranged on both Android and iOS stores for my own privacy but I have been exploring options for making a cross-platform app using React Native. Been experimenting with Expo but again nothing to show for now.

A version of this site that would be more mobile-friendly would be nice, though I don't see any real reason why it should be its own app.

One of the advantages would be better notifications that aren't email. Also potentially GDPS switching. Is is possible currently to switch servers using a DNS app to switch boomlings.com to a different server. However 2.2 has been confirmed to use https which makes this harder. Having an app also helps discoverability (mostly from kids searching on the app store for GD and downloading any free apps that look related lol)