Privacy

Without an account

Your attempts, settings and today's free-problem count are kept in this browser's storage. They are not sent to us. Clearing your browser data removes them.

With an account

We store, keyed by an account id and nothing else:

• your email address, and your first name if you give one or sign in with Google;
• your attempts: the problem, your answers and the result;
• your settings, exam date and time zone, used for the free-problem reset, the countdown and reminder emails;
• your plan, its dates, the amount paid and the Stripe customer id.

Card details are entered on Stripe's page and never reach us. Accounts and data are held with Supabase in the United States; payments are handled by Stripe. No personal data goes in page addresses, and we do not sell or share it.

Deleting your data

Settings, then Delete account, removes your attempts, settings and payment link at once, well inside the 24 hours we promise. Stripe keeps its own payment records as the law requires. Questions: support@dosedrills.com.