Got proposed to install this on my phone. Can’t be sure if it’s a new thing. (If it isn’t, let me know.) It’s not a standalone app, just a Chrome web interface, but still good to keep that separation. The speed of adding new features has been great, all things considered.
This works for Firefox as well with nothing else needed. Had kbin open and in the options menu it had an ‘Install’ button which made it work just the same.