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Privacy Policy

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Note: The German version on /privacy is the legally binding version. This English version is provided for convenience.

Last updated: June 2026

1. Controller

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

David Schliewe
Sittarder Str. 57, 52078 Aachen, Germany
Email: david.schliewe99@gmail.com

2. Processing when visiting the site

When you visit this website, our hosting provider automatically processes information that your browser transmits. This includes:

  • IP address (only transiently processed to deliver the site)
  • Date and time of access
  • Requested URL and HTTP status code
  • User agent (browser, operating system)
  • Referrer URL (if transmitted by the browser)

This data is processed only transiently to deliver the website; the hosting provider (Cloudflare Pages) does not retain persistent HTTP request logs by default, so no server-side access logs are stored.

This processing is necessary to provide the website and to protect it from abuse on the basis of our legitimate interests (Art. 6(1)(f) GDPR).

3. Hosting

The website is served as a static export via Cloudflare Pages, operated by Cloudflare, Inc. (101 Townsend St, San Francisco, CA 94107, USA). Content is delivered through Cloudflare's global edge network; in doing so, the data listed in section 2 is processed on our behalf (Art. 28 GDPR). Transfers to third countries (in particular the USA) cannot be ruled out; Cloudflare relies on the EU Standard Contractual Clauses for this (Art. 46 GDPR).

4. Cookies and local storage

Under normal use this website does not set any tracking or marketing cookies. Our hosting and security provider Cloudflare may, in individual cases (e.g. during a bot-protection challenge), set strictly necessary security cookies; these are exempt from consent under § 25(2) TDDDG.

The only item stored in your browser's localStorage is your chosen color theme (light/dark). It is written only upon your active choice, is required for the function you explicitly requested, persists until you clear it, and is therefore exempt from consent under § 25 TDDDG. This data never leaves your device.

All calculations performed by this application run exclusively client-side in your browser. No input data (amounts, configuration) is transmitted to any server.

5. Analytics

No analytics tools, tracking, or profiling are used.

6. External links / donation services

This website may include links to external services such as donation or support platforms (e.g. “Buy Me a Coffee”). When you visit those external sites, only the privacy terms of the respective provider apply. We have no influence on their processing. No data is transmitted to these services unless you explicitly click such a link.

7. Your rights

You have the right at any time to access (Art. 15 GDPR), rectification (Art. 16), erasure (Art. 17), restriction of processing (Art. 18), data portability (Art. 20), and to object to processing (Art. 21). To exercise these rights, contact us using the details under section 1.

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

8. Changes

We reserve the right to update this statement if the way data is processed changes (e.g. due to new features).