Privacy Policy

Last updated: February 2026

Note: This is a convenience translation provided for informational purposes only. The German version of this Privacy Policy is the sole legally binding version.

Data Controller

Aleksei Aduevskii

Email: aleksdevelopergp@gmail.com

For full contact details, please refer to the Legal Notice.

Hosting

This website is hosted on Google Firebase Hosting. When you visit the site, certain technical data is automatically recorded in server log files. This includes your IP address, browser type and version, the page you requested, and the date and time of your visit. This data is collected on the basis of Art. 6(1)(f) GDPR (legitimate interest in the secure and stable operation of the website).

Provider: Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland.

Google Fonts

This website uses web fonts provided by Google Fonts. When you load a page, your browser establishes a connection to Google's servers in order to retrieve the required font files. In the course of this connection, your IP address is transmitted to Google. The legal basis for this processing is Art. 6(1)(f) GDPR (legitimate interest in a uniform and appealing presentation of the website).

For further information, please see the Google Privacy Policy.

Google AdSense

This website uses Google AdSense to display advertisements. AdSense may use cookies and similar tracking technologies to serve ads and to measure their performance. These technologies are only activated after you have given your explicit consent (legal basis: Art. 6(1)(a) GDPR). You can withdraw your consent at any time using the "Privacy Settings" button in the page footer.

Provider: Google Ireland Limited. For more details, see Google Advertising & Privacy.

Firebase Authentication

If you choose to create an account, we use Firebase Authentication to manage user sign-in. This service may process your email address and authentication tokens. The legal basis is Art. 6(1)(b) GDPR (performance of a contract — providing the service you requested) and Art. 6(1)(f) GDPR (legitimate interest in secure account management).

Provider: Google Ireland Limited.

Local Storage

This website stores your learning progress and user preferences (such as your selected theme and consent status) in your browser's local storage. This data remains entirely on your device and is not transmitted to any server. You can clear this data at any time through your browser settings.

Your Rights Under the GDPR

Under the General Data Protection Regulation, you have the following rights with respect to your personal data:

• Right of access (Art. 15 GDPR) — You may request confirmation of whether your personal data is being processed and, if so, obtain a copy of that data.
• Right to rectification (Art. 16 GDPR) — You may request correction of inaccurate personal data.
• Right to erasure (Art. 17 GDPR) — You may request deletion of your personal data under certain conditions.
• Right to restriction of processing (Art. 18 GDPR) — You may request that processing of your data be restricted in certain circumstances.
• Right to data portability (Art. 20 GDPR) — You may request to receive your personal data in a structured, commonly used, machine-readable format.
• Right to object (Art. 21 GDPR) — You may object to the processing of your personal data based on legitimate interests.

If you believe that the processing of your personal data violates data protection law, you have the right to lodge a complaint with a supervisory authority, in particular in the EU member state of your habitual residence, place of work, or the place of the alleged infringement.

To exercise any of these rights, please contact us via our contact page or by email at aleksdevelopergp@gmail.com.