Tennis Note
Fair doubles rotations, scores and dues for tennis groups
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Tennis Note - Fair doubles rotations, scores and dues for tennis groups

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TennisNote runs a recreational tennis club. Check who's coming, generate a fair doubles (or singles) rotation in one tap — max 1-game difference per player, minimal repeat partners and opponents — enter scores court-side or from a smartwatch, and get win rates, rankings, monthly awards and an AI match recap. Dues tracking included. Web, Android, iOS.

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Hi PH 👋 I'm Sungkyun from Seoul. I built TennisNote for the person every tennis group has: the one who makes the rotation sheet every week. It's been used by real clubs every match day since October 2025 — 19,161 games and 2,397 matches scored so far (as of Sep 2026). What it does: - Attendance — post a sign-up link in your group chat, or upload a screenshot of the chat poll and it picks out who's coming. - Fair rotation — 11 formats (7 doubles, 4 singles) plus team, tournament and round-robin. Max 1-game difference per player, same partner/opponent repeats minimized, nobody sits out twice in a row. Late arrival or early leave? Reorder without changing pairs. Every update passes an automatic check against 200 random rosters. - Scores → stats — enter court scores and you get win rates, partner chemistry, rankings, monthly awards and a 20-type "player character". A Wear OS smartwatch can show today's courts and take score input. - AI recap — why this rotation is fair, and a match-day write-up (MVP, upsets) with optional narration. - Dues — monthly payment table, reminders, income/expense summary. Members don't need to install anything — the web version works, and only the organizer needs an account to run the day. Interface in English, Japanese and Korean. Free for now. I'd love to hear how your group does its weekly rotation today — spreadsheet? paper? a WhatsApp argument?