Privacy Policy

• Account details. Your email address and the username you choose. If you sign in with Google, we receive your email address and basic profile information from Google, never your Google password.
• Game activity. Your wagers, picks, stakes, balance, and transaction history within the game.
• Operational records. Session cookies that keep you signed in, and rate-limiting records that stop abuse of the wager endpoints.

We do not collect payment details, because nothing in KOIN costs money.

KOIN is a competitive leaderboard, so some of your activity is visible to everyone, including people who aren't signed in:

• Your username, balance, and league standing.
• Your wagers on a fight after that fight has settled.

Your open wagers stay private until settlement. Nobody can see your pick while betting is still live. Your email address is never shown publicly. Choose a username you're comfortable being seen.

We use a small number of service providers to operate KOIN. They process data on our behalf; we don't sell or rent it to anyone.

• Supabase: database, authentication, and session management.
• Vercel: application hosting and delivery.
• Google: only if you choose to sign in with Google.
• Resend: sends account emails such as sign-up confirmation and password resets.

We use cookies for one purpose: keeping you signed in. There are no advertising, profiling, or cross-site tracking cookies. Clearing them signs you out.

• Access or correct your account details from your profile page.
• Delete your account. Email us and we'll remove your account and personal data. Settled wagers may be retained in anonymised form so historical leaderboards stay consistent.
• Stop account emails by deleting your account. We only send transactional messages (confirmation, password reset), never marketing.

We keep your account data for as long as your account exists. Operational logs are kept only as long as they're useful for debugging and abuse prevention.

KOIN is intended for users 18 and over. Although no real money is involved, the game simulates wagering. We don't knowingly collect data from anyone under 18; if you believe a minor has created an account, contact us and we'll remove it.

If this policy changes materially, we'll update the date at the top of this page. Questions, corrections, or deletion requests: support@koinmma.com.