Privacy Policy

Account data

When you create an account we store your email address, your display name and your training data: solved puzzles, attempts, rating, streaks, review schedule, league results and purchases.

Guest mode

The free guest demo stores nothing on our servers. Its temporary state lives only in your browser.

Payments

Subscriptions and course purchases are processed by Stripe. We never receive or store your card details.

Your rights

You can request deletion of your account and its training data at any time, from the email address linked to the account.