Privacy policy

What we collect

Your email address (and name and avatar if you sign in with Google), the rating you enter, and your training activity: which positions you have studied, drill results and review schedule. If you buy a plan, Stripe collects your payment details; we never see your card number.

How we use it

To run your account, build your curriculum, schedule your reviews, and bill your subscription. We do not sell your data and we do not use it for advertising.

Where it lives

Accounts and progress are stored with Supabase. Payments are processed by Stripe. Position verdicts are requested from the Lichess tablebase API (the request contains only the chess position, never who you are). We use privacy-friendly page analytics that do not use cookies.

Your choices

You can export or delete your progress from the Stats page. To delete your account entirely, email us from the address on your account and we will remove it within 7 days.

Contact

Questions: hello@lucena.chess (replace with your real support address before launch).