Privacy Policy

Last updated: 2026-04-28

GuanMaster ("we") values your privacy. This policy explains what data we collect, how we use it, and your rights.

1. Data we collect

• Account: profile data from LINE or Google OAuth (name, avatar, and email if available) — we never store your password
• Your clubs: club name, location, members, match stats
• Usage: sign-in times and basic technical info (IP, browser)

2. How we use it

• To run the badminton club management and live board features
• To authenticate and secure your account
• To improve the product

3. Storage

All data is stored on Supabase (PostgreSQL), encrypted in transit (TLS), with Row Level Security so only the club organizer can access their own club's data.

4. Third parties

We do not sell, rent, or share your data with third parties for marketing. Data processors: Supabase (database/auth), Vercel (hosting), LINE and Google (OAuth — only the one you sign in with), Stripe (payment processing — only when you make a lifetime purchase).

5. Public live board links

When you share a Live Board link, anyone with the link can view member names, pairings, and scores for that session — no account required. The link only exposes the active and completed sessions of that club.

6. Your rights

• Access, edit, and delete your data any time in the app
• Request account & full club-data deletion via the contact form — completed within 30 days