Privacy Policy
What we collect
Account details from Google sign-in (name, email, profile image, locale); prompts you submit and volumes you create; an email address you choose to leave so we can tell you when a volume is ready (used for that one message, then deleted); optional demographics you choose to provide (birth date, gender); purchase records; and usage/analytics including a hashed form of your IP address. Google does not provide us your age or gender.
How we use it
To generate and store your volumes, operate the public library, process payments, prevent abuse, send transactional email, and understand and improve the Service in aggregate.
Third parties
We share data as needed with: OpenRouter (AI generation — prompt logging kept off), Stripe (payments), Resend (email), PostHog (analytics), and Railway (hosting & database). We do not sell your personal information.
Cookies
We use a signed, first-party cookie to track your free volume before sign-in, and a session cookie once you sign in. We do not use third-party advertising cookies.
Retention & your rights
We keep your data while your account is active. You may request access to or deletion of your data at z@greatlibrary.ai.
Children
The Service is for adults 18+. We do not knowingly collect data from children.