Any interest in honorable mentions? I've got a (pretty basic) kanban-style taskboard manager app clocking in at just under 715kb.[0] When I finish the project and switch to using the minified code, I think I'd still be a hair over 512, so it's a fully lost cause at making the club, but I hope you can forgive the shameless plug due to shared appreciation for small apps!

[0] https://catapart.github.io/magnit-ceapp-taskboard-manager/de...