Privacy Policy

Thank you for using PDF Reader, developed by Qingdao Lvzong Network Co., Ltd. We value your privacy and are committed to protecting your personal information. This Privacy Policy is intended to inform you about how we handle, collect, use, and protect your information when you use our application.

Information We Collect

PDF Reader is designed with privacy in mind. We minimize data collection to only what is necessary for app functionality:

• Advertising ID: We temporarily collect your device's advertising ID for the sole purpose of delivering relevant advertisements within the app. This ID is not permanently stored and is not used to identify you personally.
• Usage Analytics: We may collect anonymous usage data to understand how our app is being used and to improve your experience. This data cannot be traced back to individual users.

We do not collect any personal information such as your name, email address, phone number, or location. Your MBTI test results are stored locally on your device and are not transmitted to our servers.

How We Use Information

The limited information we collect is used for the following purposes:

• Advertisement Delivery: To display relevant ads within the application
• App Improvement: To analyze usage patterns and improve app functionality
• Performance Optimization: To ensure the app runs smoothly on your device

Third-Party Services

Our application uses third-party advertising services to display ads. These services may collect information about your interactions with ads. The advertising ID we collect is shared with these services solely for ad targeting purposes. These third parties include:

• Google AdMob
• Other advertising networks that may be integrated in the future

Please note that these third-party services have their own privacy policies, and we are not responsible for their practices. We encourage you to review their privacy policies when interacting with their services.

Data Security

We implement reasonable technical and organizational measures to protect your information:

• Advertising IDs are used temporarily and are not permanently stored
• All data transmission is encrypted using industry-standard protocols
• We regularly review our security practices to ensure your information is protected

Your Rights and Choices

You have the following rights regarding your data:

• Advertising Opt-Out: You can limit ad tracking by adjusting your device settings (Settings > Privacy > Advertising on Android)
• Data Access: Since we don't collect personal information, there is no personal data for us to provide
• Data Deletion: All data is either stored locally on your device or used temporarily, so you can delete it by uninstalling the app

Children's Privacy

PDF Reader is not directed to children under the age of 13. We do not knowingly collect personal information from children under 13. If you are a parent or guardian and believe that your child has provided us with personal information, please contact us, and we will take steps to delete such information.

Changes to This Privacy Policy

We may update our Privacy Policy from time to time to reflect changes in our practices or for other operational, legal, or regulatory reasons. We encourage you to review this page periodically for the latest information. If we make significant changes to the Privacy Policy, we will notify you through in-app notifications or other appropriate means.

International Data Transfers

Your information may be transferred to, and maintained on, computers located outside of your state, province, country or other governmental jurisdiction where the data protection laws may differ from those of your jurisdiction. If you are located outside China and choose to provide information to us, please note that we transfer the data to China and process it there.

Contact Us

This Privacy Policy was last updated on November 9, 2025.