Privacy Policy

Last updated: July 5, 2026

1. Information We Collect

We collect information you provide directly to us when using SinoSpark, such as your progress data, flashcard reviews, and app preferences. We use standard analytics (like Firebase Analytics) to understand how the app is used and to improve your experience.

2. Third-Party Services & AI Processing

To power our advanced language features (like Shadowing Studio and Live Roleplay), your voice recordings and text inputs are securely transmitted to third-party AI providers (Google Gemini) for real-time grading and processing. We do not use your personal data to train these AI models. Additionally, we use RevenueCat to securely manage your premium subscriptions.

3. How We Use Your Information

Your data is strictly used to provide the spaced-repetition algorithm functionality, track your HSK learning progress, and improve the app's calligraphy recognition features.

4. Data Security

We prioritize the security of your data and use commercially acceptable means to protect it. Progress is stored locally on your device where possible.

5. Contact Us

If you have any questions about this Privacy Policy, please contact us at contact@sinospark.com.