Privacy policy

Last updated: August 8, 2026.

QuestionCard is built to run in your browser, and that shapes what we do and don't collect.

What stays on your device

Deck progress, quiz scores, favorited cards, Plus activation, and every custom deck you build are stored in your browser's local storage. They are never uploaded, and we can't see them. Clearing your browser data deletes them.

What we collect

Two things. First, anonymous usage analytics (page views and events like "checkout clicked") via Vercel Analytics, which doesn't use cookies or track you across sites. Second, if you buy QuestionCard Plus, we store your license key and the Stripe checkout session id used to issue it, so the key can be verified and recovered. Payment details are handled entirely by Stripe — we never see your card number.

What we don't do

We don't sell or share your data, run third-party ad trackers, or require accounts. There is no email list unless you email us first.

Contact

Questions about privacy: email Mark@Reinventing.AI.