Privacy Policy

1. Information we collect

Account information — such as your username, email address, and password (stored hashed, never in plain text).

Activity data — problems you attempt, answers you submit, ratings, matches, sprint results, and similar gameplay telemetry used to power ratings, leaderboards, and your progress.

Technical data — basic log and device information (e.g. IP address, browser type) needed to operate and protect the Service.

2. How we use your information

We use your information to provide and personalize the Service, calculate ratings and match you with opponents, maintain leaderboards, communicate with you about your account, and detect and prevent abuse. We do not sell your personal data.

3. Cookies

We use cookies and similar technologies to keep you signed in and to remember preferences such as your language. Disabling cookies may affect core functionality such as staying logged in.

4. Marketing emails

We only send newsletters and occasional product updates if you have opted in — this is never required to use the Service. You can change your mind at any time from your account preferences, and every marketing email will include an unsubscribe option. Account and security messages (such as password or sign-in notices) are not marketing and are sent regardless of this setting.

5. Sharing

We share data with service providers who help us operate the Service (for example hosting and infrastructure providers), under appropriate confidentiality obligations. We may also disclose information when required by law or to protect the rights and safety of our users and the Service. Public profile elements such as your username, rating, and leaderboard position are visible to other users.

6. Data retention and security

We retain your information for as long as your account is active or as needed to provide the Service and meet legal obligations. We use reasonable technical and organizational measures to protect your data, though no system can be guaranteed perfectly secure.

7. Your rights

Depending on your location, you may have rights to access, correct, export, or delete your personal data, and to object to or restrict certain processing. You can delete your account yourself at any time under Settings → Delete account; doing so erases your username, email and password (past matches and ratings are retained anonymously so other players’ histories stay intact). For any other request, contact us at the address below.

8. Changes to this policy

We may update this Privacy Policy from time to time. If we make material changes, we will take reasonable steps to notify you.

9. Contact

Questions about your privacy? Contact us at [email protected]. See also our Terms of Service.