Thank you for choosing to use our app, Document Viewer -PDF Reader. By choosing to use our services, you consent to the collection and use of information described in this policy. We will not use or share your personal information with anyone, except as otherwise described in this Privacy Policy. This privacy policy explains how we collect, use, store, and protect your personal information, and clarifies your rights as a user. Please read the following carefully.

1. Collection and Use of Personal Information

To provide and improve our services, we may collect the following types of personal information:

Basic Information: We may collect your basic personal information, including but not limited to your name and email address. This information is primarily used to understand your needs and provide you with the best user experience.

Device Information: When you use the app, we may collect device-related information, including device type, model, operating system version, and unique device identifiers. This information helps us understand the type of device you are using so that we can provide services and features more tailored to users on different devices.

Usage Data: To optimize the app and provide a better user experience, we automatically receive and record information generated during your app usage, such as your IP address, browser type, language preference, access time, and frequency of feature usage. This data helps us understand user habits and behaviors for analysis and continuous service improvement. We will strictly protect your privacy and comply with relevant laws and regulations to safeguard user data. Thank you for your support and understanding.

We collect this information to better understand your needs and provide better service. We promise to strictly comply with relevant laws and regulations and do our utmost to protect the security of your personal information.

Other Legitimate Uses

Product Development: Anonymized data may be used for statistical analysis to guide new feature development or market strategy.

Third-Party Service Integration: With your consent, we may share necessary data with partners (such as payment providers) to implement specific features.

3. Data Security and Storage

To ensure the security of your personal information, we have implemented a series of stringent protection measures. These measures include, but are not limited to, the use of encryption technology to protect your information from unauthorized access or use, and setting access permissions to restrict access to your data to only authorized personnel.

We store your data on secure servers equipped with advanced security measures to prevent unauthorized access or corruption. We restrict and monitor all access to your data to ensure that only authorized personnel have access. 4. Use of Third-Party Services

Our applications may contain links to third-party websites or services that we do not own or control. Our Privacy Policy does not apply to these third-party services. Therefore, to ensure the adequate protection of your personal information, we strongly recommend that you carefully read the privacy policies of these third-party services before using these links to ensure the security of your personal information.

5. User Rights Protection

We respect your privacy and you have the following control rights:

- Manage permissions: You can turn off permissions such as location and notification bar through device settings.

- Data access and deletion: If you need to view or delete personal information, please contact our customer service team.

We promise to use data only for the stated purpose and follow the minimum necessary principle. For complete data processing rules and storage period, please refer to the text of the privacy agreement.

6. Age Limits

We understand that protecting children's privacy is particularly important, especially in online environments. Our services are not designed or directed to children under the age of 13. We do not knowingly collect personal data from children under the age of 13. If a parent or guardian becomes aware that their child under the age of 13 has provided us with personal data without legal consent, they should contact us immediately. If we discover that we have inadvertently collected personal data from a child under the age of 13, we will take steps to delete that information. This may include contacting the user to verify their age. If we determine that the user is under the applicable age for our services, we will delete their profile as quickly as possible. Furthermore, if we learn that we have collected personal information from a child under the age of 13, we will not use it for any purpose.

7. Contact Us

If you have any questions about this Privacy Policy or need to exercise your rights, please contact us at:qunatumai.developer@gmail.com