Castin Privacy Policy

Last Updated: August 16, 2025

1. Information We Collect

1.1 Device Information

Castin collects the following information locally on your device:

• Device Name: The custom name you set for your DLNA device (stored locally in UserDefaults)
• Network Information: Your device's IP address for DLNA service functionality
• System Information: Basic macOS system information for compatibility and troubleshooting

1.2 Usage Data

We do not collect any usage data, analytics, or telemetry information. All application usage remains local to your device.

1.3 Media Content

2. How We Use Your Information

2.1 Local Processing Only

All information collected by Castin is processed locally on your device and is not transmitted to any external servers or third parties.

2.2 Service Functionality

We use your device information solely for:

• Providing DLNA discovery and streaming services
• Storing your device preferences locally
• Managing network communication for media streaming
• Facilitating local file downloads to your designated folders

3. Data Storage

3.1 Local Storage

Castin stores the following information locally on your macOS device:

• Device name preferences in UserDefaults
• Downloaded media files in your Documents/CastinDownloads folder
• Application settings and configuration

3.2 No Cloud Storage

We do not store any of your personal information, preferences, or media content on cloud servers or external databases.

4. Data Sharing

5. Network Communications

5.1 Local Network Only

Castin operates exclusively on your local network:

• DLNA service discovery and communication
• HTTP server for receiving media streams (port 8199 by default)
• SSDP protocol for device discovery

5.2 Internet Access

Castin may access the internet only when:

• Downloading media content from M3U8 streams you provide
• Accessing online media URLs for streaming purposes

6. Third-Party Services

6.1 FFmpeg Integration

Castin uses FFmpeg for media processing. FFmpeg is open-source software and operates locally on your device. We do not control FFmpeg's data handling practices.

7. Data Security

7.1 Local Security

We implement reasonable security measures to protect your information:

• Local data storage using macOS standard security practices
• No transmission of sensitive data over networks
• Regular application updates to address security vulnerabilities

7.2 Your Responsibility

You are responsible for:

• Maintaining the security of your macOS device
• Securing your downloaded media files
• Using the application on trusted networks only

8. Children's Privacy

Castin is not intended for use by children under the age of 13. We do not knowingly collect personal information from children under 13.

9. Your Rights

9.1 Data Access and Control

Since all data is stored locally, you have complete control over your information:

• Access and modify device preferences through the application interface
• Delete downloaded media files from your file system
• Reset application settings by deleting preferences
• Uninstall the application to remove all local data

9.2 Data Deletion

To delete all Castin data from your device:

• Delete the CastinDownloads folder from your Documents directory
• Remove Castin preferences from macOS Settings
• Uninstall the Castin application

10. International Users

Castin is developed and operated from [Your Location]. By using the application, you agree that your data will be processed in accordance with this Privacy Policy and applicable local laws.

11. Policy Updates

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

• Posting the updated policy within the application
• Providing a summary of significant changes
• Updating the "Last Updated" date at the top of this policy

12. Contact Us

If you have any questions about this Privacy Policy or how we handle your information, please contact us at:

i.hou@163.com

13. Consent

By using Castin, you consent to the collection and use of information as described in this Privacy Policy.