Privacy

Who is responsible

We publish the operator's legal name, address and contact email here before purchases open. Until then, the site is free to use and nothing is sold.

Using the calculator and the index

No account is needed and nothing you type is sent to us. The numbers you enter in the calculator live in the page address, so a shared link carries them. Your printer, rate and Etsy fees are remembered on this browser, so the next visit starts from them. They never leave your device. The Forget link under The print clears it.

Analytics

We use Vercel Web Analytics, which counts page views without cookies and without identifying you across sites. There is no advertising, no tracking pixel and no third-party tracker.

If you sign in

Sign-in is a one-time link sent to your email. We then store your email address and the calculations you choose to save, each with a name and the calculator's page address. If you buy Pro, we also store your Stripe customer id and the status and period of your subscription. We store all of this with Supabase in Frankfurt, Germany (EU).

If you ask to be told when Pro opens, we store that email address for one purpose. We use it to send the single email that says Pro has opened. We do not use it for anything else and do not pass it on. Write to us to have it removed at any time.

If you send a message through the Help button in the corner, we store the message and which page it was sent from. If you typed your email address, we store that too, so we can answer. Nothing else is attached to it.

You enter payment details on Stripe's checkout, and they never reach our servers. Stripe is the payment processor and keeps what it needs for the payment and for tax. See Stripe's own privacy policy.

The index data

We build the demand index from public listings on MakerWorld, Printables and Etsy. It includes each listing's model title, creator, download and like counts, price and the date the source published it. It contains no personal data about you. Creator names appear as the sources show them. We show listing photos and model covers from the sources' own servers, linked to the original listing. We never copy or store them ourselves. A creator or shop that wants a listing or photo removed from these pages can write to info@3dprintindex.io.

Deletion and your rights

Write to info@3dprintindex.io from the email you signed in with. We then delete the account, its saved calculations and the billing record within 30 days. Stripe keeps the payment record for as long as tax law requires. You can also ask what we hold about you, correct it, or complain to your data protection authority.