Privacy policy

Your progress (tercets passed, your grimoire, your level and settings) is kept in your own browser, on your device. It is not sent to us. Clearing your browser’s site data for terzina.app deletes it.

Accounts are provided by Clerk, which holds your email address, your name if you give one, and what is needed to sign you in securely (including session cookies, which are the only cookies Terzina uses). Once you sign in, your progress is saved in our database, hosted by Neon, so it follows you between devices.

If you report a word (Segnala, on the word card), we keep the report with your account’s ID: the word, where it is in the poem, what kind of problem it is, your note if you write one, what the card showed you and your level, so the correction can be checked. Only the people who correct the glossary and the recordings see reports. A report is kept until it is dealt with, and deleted a year after that.

Payment is handled by Stripe, and sold through Link, Stripe’s reseller service. They process your payment details under their own privacy policies; we never see your card. We receive and keep a record of the purchase (its reference, amount, currency, date and whether it was refunded) linked to your account, because tax law and refunds require it.

When you talk with your guide, the tercet you are reading, your level, the first name you chose, and your messages are sent to Anthropic (Claude) or Google (Gemini) to write the reply. When you ask for pronunciation feedback, your recording is sent to Google (Gemini) to be heard, and is not kept by us. Illuminating a verse sends only the verse. These services process the data to answer you, under their commercial terms for API use.

To keep AI costs fair, we count each day’s AI requests per account, or for signed-out visitors per salted, one-way hash of the connection, never the address itself. These counts are deleted after 31 days.

Terzina runs on Vercel, which also serves the recordings; like any web host it keeps short-lived request logs, including IP addresses, for security and reliability. Vercel also counts page views for us (Vercel Web Analytics): it sets no cookies, keeps no identifier that follows you, and tells us only which pages are read and from which country and kind of device. If we email you (receipts, account messages, or a notice about Terzina), it is sent through SendGrid. We do not send marketing email.

Your account and saved progress are kept until you delete your account or ask us to. Purchase records are kept for as long as tax law requires, usually seven years. You can ask to see, correct, export or delete your data at any time, by writing to support@terzina.app. Deleting your account removes your saved progress; the record of a purchase stays for the period the law requires.

Our service providers are in the United States and elsewhere, so your data may be processed outside your country, with the safeguards those providers offer. If you are in the EU or UK and believe we have mishandled your data, you may also complain to your data protection authority.

Terzina is not meant for children under 13, and we do not knowingly keep an account for anyone younger. If you think we do, write to support@terzina.app and we will delete it.

If this policy changes in a way that matters, we will say so on the site before the change takes effect. The terms for buying the book are in the Terms of sale.