Privacy

PetriKey is a study reference. We keep data collection minimal and store your study progress in your own browser.

What stays on your device

Your notes, flashcard mastery, quiz progress, and Premium access identifier are stored in this browser's local storage. They are not uploaded to us and are not shared. Clearing your browser storage removes them.

Analytics

If analytics is enabled for this site, we use Cloudflare Web Analytics. It is cookieless and privacy-first: it reports aggregate traffic (page views, referrers, country-level region) without tracking individuals across sites and without building a profile of you. There is no advertising network and no cross-site tracking.

Payments

Premium purchases are processed by RevenueCat and Stripe. When you subscribe, your email and payment details are handled directly by those providers — PetriKey never sees or stores your card number. To recognise your Premium access on this device, an anonymous purchase identifier is stored in this browser's local storage. You can copy it from the Premium page to restore access on another browser via Restore access.

Contact

Questions about privacy? Reach out through the support address on your purchase receipt, or reply to your receipt email from the address you paid with.