Privacy Policy
Last updated: June 2026
This website (RabbitHole21) is a pure learning quiz. There are no user accounts, no registration and no tracking. We collect as little data as technically possible.
1. Controller
Achim Schreiber KompassWelt
Owner: Achim Schreiber
Jakob-Klar-Str. 6
80796 Munich, Germany
E-mail: info@kompasswelt.com
2. Hosting and server log files
The website is hosted by Vercel Inc. (340 S Lemon Ave #4133, Walnut, CA 91789, USA). When you access the website, technically necessary data that your browser transmits automatically is processed — in particular your IP address, the date and time of access, the page requested, and browser and device information.
This processing serves the secure and stable operation of the website. The legal basis is our legitimate interest in a functional and secure web presence (Art. 6(1)(f) GDPR). Vercel processes this data as a processor on our behalf. As processing may also take place in the USA, the data transfer is based on the corresponding safeguards (e.g. Standard Contractual Clauses and/or participation in the EU-US Data Privacy Framework).
3. Local storage in the browser (localStorage)
So that the quiz remembers your learning progress (unlocked levels, scores achieved), we store this information exclusively locally in your browser via the “localStorage” mechanism. This data remains on your device, is not transmitted to us or to any third party and serves solely the functionality of the quiz. You can delete it at any time by clearing the site data in your browser settings.
4. No cookies, no analytics, no advertising
We do not use any tracking or analytics cookies, we do not measure reach and we run no advertising. No third-party content (e.g. external fonts or scripts) is loaded.
5. No disclosure to third parties
We do not pass on any personal data to third parties — apart from the technically necessary processing by our hosting provider described above.
6. Your rights
You have the right of access (Art. 15 GDPR), rectification (Art. 16), erasure (Art. 17), restriction of processing (Art. 18) as well as the right to object (Art. 21) and to data portability (Art. 20). To exercise these rights, please contact the address given above.
You also have the right to lodge a complaint with a data protection supervisory authority. For Achim Schreiber KompassWelt this is the Bavarian State Office for Data Protection Supervision (BayLDA), Promenade 18, 91522 Ansbach, Germany.
This English translation is provided for convenience. In the event of any discrepancy, the German version applies.