Privacy Policy

1. Data Protection at a Glance

General Information

The following information provides a simple overview of what happens to your personal data when you visit this website. Personal data is any data that can personally identify you.

2. Responsible Party

The responsible party for data processing on this website is:

3. Hosting

The data is hosted on a server rented from Hetzner Online GmbH. All data is stored and processed in Germany (European Union) and is not transferred outside the EU.

4. Data Collection on This Website

4.1 Server Log Files

The web server temporally logs accessed sites.

Legal basis: Art. 6(1)(f) GDPR (legitimate interest in system stability)

Retention period: Logs are periodically deleted every few months.

4.2 User Account Data

When you create an account on our learning platform, we collect and store the following data:

• User ID: Unique identifier
• Username: Your chosen username
• Email address: For account management and communication
• Password: Stored as encrypted hash
• Account creation date
• Profile data: Streak count, total points, level, answer history

Legal basis: Art. 6(1)(b) GDPR (performance of a contract)
Retention period: Until account deletion

4.3 Learning Progress Data

To provide the learning platform functionality, we store:

• User progress: Knowledge levels, review history, correct/incorrect answers, streaks
• Answer history: All answers to questions with timestamps
• Fact learning status: Learned facts, consecutive correct/wrong answers
• Category progress: Current difficulty level per category
• Sprint data: Active learning sprints, goals, completion status

Legal basis: Art. 6(1)(b) GDPR (performance of a contract)
Retention period: Until account deletion

4.4 Content Created by Users

Users can create and share learning content:

• Topics: Name, description, public/private status, votes, creator ID
• Categories: Within topics
• Facts: Learning content, explanations, difficulty levels
• Questions: Question text, answers
• Sources: Source information for facts (URLs, authors, titles)
• Topic suggestions: User suggestions for topics

Legal basis: Art. 6(1)(b) GDPR (performance of a contract)
Retention period: Until manually deleted by user or account deletion

4.5 Social Features Data

For social features, we store:

• Friendships: Friend connections, request status
• Topic votes: Upvotes/downvotes on topics
• Topic views: When users view topics
• User badges: Earned badges and timestamps

Legal basis: Art. 6(1)(b) GDPR (performance of a contract)
Retention period: Until account deletion

4.6 Cookies

This website uses essential cookies to enable basic functionality:

• Session cookies: To keep you logged in
• Preference cookies: To remember your settings (theme, language)
• Local storage: For offline functionality and caching

Legal basis: Art. 6(1)(f) GDPR (legitimate interest in providing functionality)
No tracking or analytics cookies are used.

5. Your Rights

You have the following rights regarding your personal data:

• Right to information (Art. 15 GDPR): You can request information about your stored personal data.
• Right to rectification (Art. 16 GDPR): You can request correction of incorrect data.
• Right to erasure (Art. 17 GDPR): You can request deletion of your data. You can delete your account at any time through the profile settings.
• Right to restriction of processing (Art. 18 GDPR): You can request restriction of data processing.
• Right to data portability (Art. 20 GDPR): You can request your data in a structured, commonly used format.
• Right to object (Art. 21 GDPR): You can object to data processing based on legitimate interests.
• Right to withdraw consent (Art. 7(3) GDPR): You can withdraw previously given consent at any time.

To exercise these rights, please contact us at: fehrlichd@gmail.com

You also have the right to lodge a complaint with a supervisory authority if you believe that the processing of your personal data violates data protection regulations.

6. Data Security

We use technical and organizational security measures to protect your data:

• Passwords are stored using secure hashing algorithms (never in plain text)
• Data transmission is secured using HTTPS/TLS encryption
• Server in Germany with restricted access
• Regular security updates

7. Third-Party Services

We do not use any third-party analytics, tracking, advertising, or external data processing services. Server infrastructure is provided by Hetzner Online GmbH (Germany).

8. Data Location

All data is stored and processed exclusively in Germany (European Union). Your data never leaves German/EU territory. No data is transferred to third countries outside the EU.

9. Changes to This Privacy Policy

We reserve the right to update this privacy policy to reflect changes in our data processing practices or legal requirements. We recommend reviewing this page periodically for any changes.

10. Contact

If you have questions about data protection, please contact us at:
fehrlichd@gmail.com