Privacy Policy

Last updated: February 8, 2026

Class Diagram E-learning ("the Extension") is a Chrome browser extension designed to help students learn UML class diagrams. This privacy policy explains how we collect, use, and protect your information.

Information We Collect

When you use the Extension, we collect:

• Google Account Information: When you sign in with Google, we receive your name, email address, and profile picture to identify you and personalize your experience.
• Learning Progress: We store your exercise completions, scores, and progress to track your learning journey.
• Diagram Data: When you submit a diagram for evaluation, we temporarily process its content to provide AI-powered feedback.

How We Use Your Information

• Authenticate and identify you within the application
• Track your learning progress across exercises
• Provide personalized AI feedback on your diagrams
• Enable teachers to assign and review student work

Data Storage and Security

• Your data is stored securely on our servers with encryption
• Authentication tokens are stored locally in your browser
• We do not sell or share your personal data with third parties
• Diagram submissions are processed for feedback and not stored permanently

Third-Party Services

• Google OAuth: For authentication (subject to Google's Privacy Policy)
• Groq AI: For diagram analysis and feedback (diagram content only, no personal data)

Your Rights

You may:

• Request access to your personal data
• Request deletion of your account and associated data
• Revoke Google access at any time via your Google Account settings

Contact

For privacy-related questions or data deletion requests, contact us at: xsmutny@stuba.sk

Changes to This Policy

We may update this privacy policy from time to time. Continued use of the Extension after changes constitutes acceptance of the updated policy.