Last updated October 30, 2026 · Beta
No account is needed. We don't ask for your name. We use anonymous usage data to make the questions and explanations better. If you give us your email, we use it only for streak reminders, and you can remove it anytime.
Your progress (answers, mastery, streak, XP, settings and interview date) is saved in your browser's local storage. Clearing your browser data or using Reset in Settings deletes it.
Usage events: pages viewed, rounds started and finished, each answer (which question, right or wrong, how sure you were, time taken), and your “was this clear?” votes. These are tied to a random ID, not your name. We use PostHog to store and analyze them; PostHog also records standard technical data like browser type and approximate location from IP.
Only if you enter it. It's used to send streak reminders and nothing else. We don't sell or share it. Remove it in Settings, or use the unsubscribe link in any email.
Questions or deletion requests: email davidhcerecero@gmail.com and we'll handle it within 30 days.