Privacy policy

Last updated: 15 November 2026. This policy explains how personal data is processed on this website under the EU General Data Protection Regulation (GDPR).

1. Controller

Amirhossein Basiri, Uferstraße 47, 79115 Freiburg im Breisgau, Germany. E-mail: sam@sambasiri.com

2. Hosting and server logs

This website is hosted by Vercel Inc., 440 N Barranca Ave #4133, Covina, CA 91723, USA. When you visit the site, Vercel processes technical data (IP address, date and time, requested page, browser and operating system) to deliver the site and keep it secure. Legal basis: Art. 6(1)(f) GDPR (legitimate interest in a secure, working website). Vercel acts as our processor under a data processing agreement; transfers to the USA are based on the EU-U.S. Data Privacy Framework and/or Standard Contractual Clauses.

3. Analytics without cookies

We use Vercel Web Analytics to count page views. It does not use cookies and does not identify individual visitors; data is aggregated. Legal basis: Art. 6(1)(f) GDPR (understanding how the site is used).

4. Cookies

We do not set cookies for tracking or advertising. The free calculator runs entirely in your browser; the numbers you enter are not sent to us.

5. Purchases

Purchases are processed by Stripe through Stripe Managed Payments, where Stripe acts as the merchant of record (reseller) and processes your payment, billing and tax data as an independent controller. See Stripe's privacy policy at stripe.com/privacy. We receive order details (name, e-mail, country, product, amount) to deliver the product, send updates to the kit you bought and handle support and refunds. Legal basis: Art. 6(1)(b) GDPR (performance of a contract) and Art. 6(1)(c) GDPR (statutory retention obligations, e.g. under German commercial and tax law, up to 10 years).

6. Contact by e-mail

If you e-mail us, we process your message and address to reply. Legal basis: Art. 6(1)(b) or (f) GDPR. We delete the correspondence when it is no longer needed, subject to retention obligations.

7. Fonts

Fonts are served from our own server. No connection to Google is made when you load this site.

8. Your rights

You have the right to access (Art. 15), rectification (Art. 16), erasure (Art. 17), restriction (Art. 18), data portability (Art. 20) and to object to processing based on legitimate interests (Art. 21). Contact us at the address above. You also have the right to lodge a complaint with a data protection supervisory authority, for example the authority in your country of residence or the authority responsible for us.