Privacy

Summary

This website sets no cookies, embeds no ad networks, uses no analytics tools, and loads no content from third-party servers. There's no sign-up and no user account. Anything you enter stays in your browser.

Controller

David Vogler, Spitalstraße 17, 4730 Raeren, Belgium. Contact by email at the address given in the imprint.

Visiting the website

When you visit, the hosting provider technically processes data required for operation in server log files: IP address, date and time, page requested, data transferred, browser type, and operating system. The legal basis is the legitimate interest in technical operation and security of the website under Article 6(1)(f) GDPR. This data is deleted after a short time and is not combined with other data.

No cookies, no tracking

No cookies are set and no traffic analytics run. That's why this website shows no consent banner.

Fonts

The font used is served from the same server as the website. There is no connection to Google or other providers, and no data is transferred to them.

Storage in your browser

The website stores a few settings locally in your browser: which explanation depth you chose, and which lessons you've marked as read. This information never leaves your device and is never transmitted. You can delete it at any time through your browser settings.

Calculators

Every calculator on this website runs entirely in your browser. Numbers you enter are never transmitted, stored, or analyzed.

Read-aloud feature

The read-aloud feature uses your device's or browser's built-in speech output. Depending on your device and settings, your browser may use services from the operating-system maker to do this. The operator of this website has no influence over that. The feature only starts after an explicit click.

Getting in touch

If you write an email, your details are processed to handle the request and are not passed on without consent. The legal basis is Article 6(1)(b) or (f) GDPR.

Your rights

You have the right to access, rectification, erasure, restriction of processing, data portability, and objection. You can also file a complaint with a supervisory authority. The competent authority is the Belgian Data Protection Authority, Autorité de protection des données, Rue de la Presse 35, 1000 Brussels.

Stand: 2026-09-05