Built a free app for running group badminton sessions: check-in, auto doubles rounds, stats

This sub is for organizing games in Pune, thought this might help whoever's running a session.

Add the players, check in whoever turned up, and it generates doubles rounds that spread court time and rotate partners, instead of the same four monopolising a court while everyone waits.

Scoring uses the real rules: 21, win by 2, cap at 30, serve rotation, side changes. The court diagram shows who serves next, so nobody argues about it. Finish a session and you get a leaderboard, plus per-player win %, form and best partner.

Works offline. Free, no ads.

Android: https://play.google.com/store/apps/details?id=com.navalo.courtside Browser, no signup, quick scoring only: https://courtside-links.vercel.app

If you're already running a regular group here, I'd like to know where it breaks, especially above ~12 players.