Privacy policy

This is an English summary; the authoritative version is the German Datenschutzerklärung.

Principle

Protecting your data matters to us. This website is deliberately data-minimising: the calculators run entirely in your browser, and what you enter is neither transmitted to us nor stored.

Controller

The controller under the GDPR is the media owner named in the legal notice.

Server log files

When you access the website, the hosting provider processes technically necessary data (e.g. IP address, time, page requested, browser type) to ensure delivery and security. The legal basis is Art. 6(1)(f) GDPR.

Fonts

The fonts used are served locally from our own server. There is no connection to third-party servers (such as Google Fonts).

Reach measurement (cookieless, no consent required)

For anonymous reach measurement we use Ahrefs Web Analytics (Ahrefs Pte. Ltd., Singapore). The service is cookieless: no cookies are set and no cross-device identifiers are formed; only aggregated access data (e.g. page viewed, referrer, coarse region) is collected, with no personal reference. The legal basis is our legitimate interest in improving our calculators and guides (Art. 6(1)(f) GDPR).

Google Analytics (only with consent)

Additionally we use Google Analytics 4 (Google Ireland Ltd., Ireland; operator Google LLC, USA) — only after your explicit consent. This sets cookies and transfers data, including your truncated IP address, to Google, where it is also processed in the USA (on the basis of the EU Standard Contractual Clauses / EU-US Data Privacy Framework). Without consent, the Google script is not loaded and no cookie is set (§ 165(3) TKG 2021). The legal basis is Art. 6(1)(a) GDPR. You can withdraw your consent at any time with effect for the future by clearing your browser's site data.

Your rights

You have the right to access, rectification, erasure, restriction of processing, data portability and objection. You may also lodge a complaint with the data protection authority (Datenschutzbehörde).

This policy will be completed with the specific details of the hosting provider.