Recently I tried to make a GTK app, but the problem was, for none of the languages I tried the bindings were working well enough. So in the end I decided to make a local first static web app in Python and Django. Everything is rendered server side and state is stored in the database. If I ever finish it, it should be easy to bring it online. And then maybe registrations ...

Yeah they're called Electron now ;)

Qt is such a pain to work with it's almost like it's intentional that people should avoid it.