> Should I package it as a .deb, or what makes something self-hosted? The code is already on github: https://github.com/lgommans/dro.pm/ (link was buried in the text - I had a hard time prioritizing what people would want to read first, since that depends on your use-case).

As for no mobile app: how much faster is it going to get than opening the browser that's already on everyone's homescreen and typing a 7-8 character link? Or if you self-host it, you can host it on your own TLD like https://me/. It being an app was also never mentioned as a requirement and I don't see how it helps, but I guess I don't need to understand. As a bonus tip, though: you can add browser bookmarks to your homescreen. Since you'll need internet to share things in the first place, it should behave roughly the same (aside from a share menu, but...).

And there is a share modal for Android, actually. See the github link.