Privacy Policy

1. Controller

The controller responsible for data processing on this website within the meaning of the General Data Protection Regulation (GDPR) is:

2. General

This is a private, non-commercial project. It does not use cookies or any analytics or tracking tools, and it does not embed content from external providers (e.g. fonts, videos or maps). The fonts are delivered together with the website. Personal data is only processed to the extent described below.

3. Hosting on GitHub Pages

This website is provided via GitHub Pages, a service of GitHub, Inc., 88 Colin P. Kelly Jr. Street, San Francisco, CA 94107, USA. When you visit the website, GitHub's servers necessarily process the information transmitted by your browser, in particular your IP address, in order to deliver the website to your device.

According to GitHub, the IP addresses of visitors to GitHub Pages sites are logged to maintain the security and integrity of the service. I have no access to these logs and do not store any access data myself.

The legal basis is Art. 6(1)(f) GDPR; the legitimate interest lies in delivering the website and operating it securely and without errors. Data may be transferred to the USA in the process. According to GitHub, such transfers are based on the EU-U.S. Data Privacy Framework (adequacy decision of the European Commission, Art. 45 GDPR) and on standard contractual clauses (Art. 46 GDPR). For details, see theGitHub General Privacy Statement.

4. Storage in your browser

So that your settings survive a reload, the website stores them only locally in your browser (local storage): selected topic, estimate, period, own amount, language, your selection in the comparison, values and prices you entered, and your answers in the “Make it about you” questionnaire. This information is not transmitted to me or to third parties.

This storage is strictly necessary for the function you expressly use (§ 25(2) no. 2 TDDDG). You can delete it at any time with the “Reset” buttons on the website or by clearing the site data in your browser.

5. Links to sources

The website links to the sources of the figures it uses. Your browser only connects to such a website when you click the link; its operator is responsible for any data processing there.

6. Contacting me

If you contact me (e.g. by letter or e-mail), I process the data you provide (e.g. name, address, e-mail address, content of your message) solely to handle your request. The legal basis is Art. 6(1)(f) GDPR. The data is deleted as soon as it is no longer required for this purpose, unless statutory retention obligations apply.

7. Your rights

Within the scope of the statutory provisions, you have the right of access (Art. 15 GDPR), rectification (Art. 16 GDPR), erasure (Art. 17 GDPR), restriction of processing (Art. 18 GDPR), data portability (Art. 20 GDPR) and to object to processing (Art. 21 GDPR). To exercise these rights, please contact me at the address given above.

You also have the right to lodge a complaint with a data protection supervisory authority about the processing of your personal data (Art. 77 GDPR).

Last updated: October 2026

This is an English translation for convenience; the German version is legally binding.