Privacy Policy

Last updated: March 11, 2026

1. Information We Collect

When you sign in with Discord, we receive your Discord user ID, username, and avatar. We do not access your Discord messages, friends list, or servers.

2. How We Use Your Information

Your Discord ID is used to associate your data (decks, match results, study progress) with your account. We do not sell or share your personal information with third parties.

3. Data Storage

Your data is stored in our database. We take reasonable measures to protect it but cannot guarantee absolute security.

4. Cookies

We use essential cookies for authentication (session cookies via NextAuth). We do not use tracking or advertising cookies.

5. Third-Party Services

We use Discord OAuth for authentication. Card images are loaded from the official One Piece Card Game website. Please review their respective privacy policies.

6. Data Deletion

You can request deletion of all your data by contacting us via Discord. We will remove your account data within a reasonable timeframe.

7. Changes

We may update this policy. Continued use of the site after changes constitutes acceptance.

8. Contact

For privacy concerns, reach out via our Discord community.