Privacy Policy for SilkStory

1. Information We Collect

1.1 Personal Information

SilkStory is designed with privacy in mind. We do not collect, store, or transmit any personally identifiable information about our users.

1.2 Photos and Images

• Camera Access: We request permission to access your device's camera to capture photos containing Chinese characters
• Photo Library Access: We request permission to access your photo library to select existing images
• Local Processing: All image processing and text recognition occurs locally on your device
• No Storage: We do not store, upload, or transmit your photos to our servers or any third parties

1.3 App Usage Data

• Character recognition results (processed locally)
• Favorite characters (stored locally on your device)
• App preferences and settings (stored locally)

2. How We Use Your Information

2.1 Core Functionality

• Process images to recognize Chinese characters using Apple's Vision framework
• Display character animation videos from our curated database
• Manage your favorite characters locally on your device
• Provide seamless app experience and functionality

2.2 No Data Transmission

Your photos and recognized text never leave your device. All processing is performed locally using Apple's on-device machine learning capabilities.

3. Third-Party Services

3.1 Google Mobile Ads

Our app displays advertisements through Google Mobile Ads. Google may collect and use data in accordance with their privacy policy:

• Advertising ID for personalized ads
• App usage statistics for ad optimization
• Device information for ad delivery

You can opt out of personalized advertising in your device settings. Learn more about Google's privacy practices at: https://policies.google.com/privacy

3.2 YouTube Integration

When you choose to open character animation videos in YouTube, you will be subject to YouTube's Terms of Service and Privacy Policy. We do not control YouTube's data practices.

4. Data Storage and Security

4.1 Local Storage Only

• All your data is stored locally on your device
• Favorite characters are saved using iOS secure storage mechanisms
• No personal data is transmitted to our servers
• App cache and temporary files are managed by iOS

4.2 Security Measures

• We use Apple's secure frameworks for all data processing
• Image processing occurs in secure, sandboxed environments
• No network transmission of personal content

5. Permissions

5.1 Camera Permission

Purpose: To capture photos of Chinese characters for text recognition

Usage: Only when you actively choose to take a photo within the app

5.2 Photo Library Permission

Purpose: To select existing photos containing Chinese characters

Usage: Only when you choose to select photos from your library

You can revoke these permissions at any time through your device's Settings app.

6. Children's Privacy

SilkStory is suitable for users of all ages, including children. We do not knowingly collect personal information from anyone, including children under 13. Since all processing occurs locally on the device and no personal data is transmitted, children can safely use our app under parental guidance.

7. Data Retention

• Your favorite characters remain on your device until you remove them or delete the app
• Temporary image processing data is automatically cleared by iOS
• No data is retained on our servers since no data is transmitted

8. Your Rights and Choices

8.1 Control Over Your Data

• Delete favorites: Remove any character from your favorites list
• Clear app data: Delete and reinstall the app to reset all local data
• Revoke permissions: Disable camera and photo access in device settings

8.2 Advertising Choices

• Limit ad tracking in your device's privacy settings
• Reset your advertising identifier
• Opt out of personalized ads through device settings

9. International Users

SilkStory is available worldwide. Since all processing occurs locally on your device, your data remains in your jurisdiction and is subject to your local data protection laws.

10. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify users of any material changes by:

• Updating the "Effective Date" at the top of this policy
• Providing notice through the app when significant changes occur
• Posting the updated policy on our website

Your continued use of SilkStory after any changes indicates your acceptance of the updated Privacy Policy.

12. Additional Information

12.1 Open Source Libraries

SilkStory uses Apple's native frameworks and libraries that comply with Apple's privacy standards:

• Vision Framework for text recognition
• AVFoundation for camera functionality
• SwiftUI for user interface
• WebKit for YouTube video display

12.2 Data Minimization

We follow the principle of data minimization - we only process the minimum amount of data necessary to provide our core functionality of Chinese character recognition and animation display.