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

The controller is the provider named in the imprint, where you'll also find the postal address and email address.

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.

What is stored in your browser

So the site can remember where you are, it keeps a few details in your browser's storage (local storage). They stay on your device. They are never transmitted, and nobody but you can see them.

• which explanation depth you picked
• which lessons you've read and which one you opened last
• which quiz questions you've passed and when a lesson is due for review
• what you type into the note fields under the lessons
• your answers in the annual money check
• the name you enter for the certificate, and the certificate's reference number
• in the classroom, the name and class you enter there

Only what a feature you use actually needs is stored. The legal basis is Article 6(1)(f) GDPR, together with the exemption for strictly necessary storage under Article 5(3) of the ePrivacy Directive.

You can delete all of it with one click. Your progress, your notes and the name on the certificate will be gone afterwards.

Delete all stored data

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.

Last updated: 2026-09-23