Privacy

We collect as little as we can. There are no accounts.

What stays on your device

Your answers and progress are stored in your browser. Clearing your browser data removes them.

What we record

We log anonymous usage events, such as starting the free check or opening checkout, with a random ID that is not linked to your name. If you arrive from an ad, we keep the ad click ID so we can tell which ads work.

Payments

Stripe processes payments. We never see your card number. Stripe shares your email and payment status with us so we can give you access and help if something goes wrong.

The tutor

If you ask the AI tutor a question, your question and the practice question it is about are sent to Anthropic to write the answer.

Cookies

Two cookies hold your free-question count and your 60-day pass. If ads are running, Google Ads may set a cookie to measure purchases.