Earlier quoted context omitted.
The difficulty of porting to mobile is generally changing the UI to work well on a small touchscreen.
The desktop UI actually worked pretty much fine on mobile, to be honest. I ran it for a while using the porting methods available from the desktop binaries to an APK. The mobile UI basically just changes the interactions from a small button on the card to a drag-bases UI, which is slightly better on mobile.
Example: https://i.postimg.cc/P5VrVhQ4/Screenshot-20250101-103921.png