Privacy

You can use Common Ground without an account. Browsing the site keeps no personal data about you: no analytics, no advertising and no tracking cookies. Your browser stores a few settings, such as the last date range you chose, and they never leave it.

If you create an account

We keep only what the account needs:

• your email address;
• how you sign in (an email link or Discord) and, with Discord, the basic profile it shares: your Discord id, username and avatar;
• when you created the account and when you last signed in;
• later, the card collection you choose to import, to compare it with the metagame.

We use these data only to give you the account. We do not sell or share them, and we do not send you marketing email. The emails you get are the sign-in links you ask for.

Where they are kept

Accounts are stored with Supabase ↗ (opens another site), in a data center in the European Union. While you are signed in, your browser keeps your session so you do not have to sign in again.

Your rights

You can ask to see, correct or delete your data, or to take a copy of it, by writing to privacy@commongroundmtg.com. Deleting your account removes everything linked to it. You can also complain to your data protection authority.