MyLeaguePickem

It connects to your Sleeper league ID, pulls your weekly matchups, and lets the whole league vote on who wins. It tracks a leaderboard so we can see who the best predictor is. Features: Syncs fully with Sleeper (just enter League ID). Secure PIN login (no email required). Mobile-first (looks like an app but runs in browser). Completely free (I'm just a dev who loves fantasy).