What leaves the platform
Your messages and the tutor’s replies are sent to Anthropic for processing. Anthropic does not retain content for training under our commercial agreement — all API calls sit inside Anthropic’s zero-retention product tier.
Payment data is handled entirely by Stripe. We never see your card number.
What parents see
Only effort signal: time on task, hints used, explain-back scores, recall streaks, Brain score. Never any content. See the parent-privacy stance for the full reasoning.
Deleting your account
Settings → Delete account. Removes your profile, sessions, messages, recall cards, and scores permanently within 30 days. Backups purge on a 90-day rolling window.
Legal version
The long, cross-jurisdictional version lives at /legal/privacy. This page is the plain-language one you can actually read.