Effective Date: October 2025
Last Updated: October 2025
Quick Summary: We use Firebase Analytics to collect anonymous usage data to improve the app. No personal information is collected. All learning data stays on your device.
📊 Information We Collect
Firebase Analytics Data (Anonymous)
We use Firebase Analytics (Google) to collect anonymous usage information:
- App Usage: Which features are used most frequently
- Session Data: How long you use the app and when
- Performance Data: App crashes and loading times
- Device Information: iOS version, device model, language settings
- Learning Events: Anonymous study patterns (e.g., "flashcard session completed")
Important: All analytics data is completely anonymous. We do NOT collect personal information such as names, email addresses, or any identifying data.
Local Device Data
The following data is stored locally on your device only:
- Learning Progress: Your study statistics and achievements
- App Preferences: Settings, theme choices, and configurations
- Vocabulary Data: HSK word lists for offline access
- User Preferences: Selected HSK level, card preferences
🎯 How We Use Your Information
We use the anonymous analytics data for the following purposes:
- App Improvement: Fix bugs and optimize performance
- Feature Development: Understand which features users find most valuable
- User Experience: Enhance the overall app experience
- Technical Support: Diagnose and resolve technical issues
Local Data: Your learning progress and preferences are used only within the app to provide personalized learning experiences.
🔒 Data Security and Storage
Analytics Data:
- Processed by Firebase (Google) using industry-standard security
- Data is anonymized before collection
- Encrypted in transit and at rest
- Retained for up to 26 months
Local Data:
- Stored securely on your device
- Never transmitted to our servers
- Persists until you delete the app
📤 Data Sharing
We do NOT sell, rent, or share your personal information.
We share anonymous analytics data only with:
- Firebase (Google): For analytics processing (subject to Google's privacy policy)
Third-Party Services: We use Firebase Analytics (Google). Their privacy policy applies to data processed by their services. You can view Google's privacy policy at:
https://policies.google.com/privacy
👤 Your Rights and Choices
You have the following rights regarding your data:
- Opt-out: Disable analytics in app settings (if available)
- Deletion: Delete the app to remove all local data
- Access: Contact us for information about data we collect
How to Exercise Your Rights:
👶 Children's Privacy
Our app is suitable for all ages, including children under 13. We:
- Do not knowingly collect personal information from children under 13
- Only collect anonymous usage data through Firebase
- Comply with COPPA (Children's Online Privacy Protection Act)
🔄 Changes to This Policy
We may update this privacy policy from time to time. When we do:
- We will notify you through the app
- The "Last Updated" date will be revised
- Continued use constitutes acceptance of changes