This privacy policy governs the use of the Portable PDF Reader mobile application (hereinafter referred to as the “App”), developed by Yongyou Trading Co (hereinafter referred to as the “Service Provider”) as a free service. The App is provided on an “AS‑IS” basis.
The App collects certain information when you download, install, and use it.
This information may include:
Your device’s Internet Protocol (IP) address
The sections of the App you access, along with timestamps and duration of your visits
Total time spent using the App
The operating system version running on your mobile device
The App does not collect or process precise location data from your mobile device.
The App does not use artificial intelligence (AI) technologies to process your personal data or deliver AI‑related features.
The Service Provider may use the collected information to contact you periodically, including for important announcements, mandatory notifications, and promotional materials.
To improve your user experience, the Service Provider may ask you to provide certain personally identifiable information. Such information will be stored and used in accordance with this privacy policy.
Only aggregated and anonymized data is periodically shared with external services to help the Service Provider optimize and maintain the App and its services.
The Service Provider may share your information with third parties only as described in this privacy policy.
Please be aware that the App uses third‑party services that operate under their own independent privacy policies.
Below is the link to the privacy policy of one such third‑party service:
The Service Provider may disclose user‑provided and automatically collected information:
When required by applicable law, such as in response to a court order, subpoena, or similar legal process
When the Service Provider, in good faith, believes disclosure is necessary to protect its legal rights, ensure user or public safety, investigate fraud, or respond to a government request
With trusted service partners acting on its behalf, who do not independently use the disclosed information and have agreed to comply with this privacy policy
You may stop all data collection by the App simply by uninstalling it from your device.
You may use the standard uninstallation functions available on your mobile device or through the relevant app marketplace.
The Service Provider will retain user‑provided data for the duration of your use of the App and for a reasonable period afterward.
If you wish to have your user‑provided data deleted, please contact the Service Provider at j70481562@gmail.com, and a response will be provided within a reasonable timeframe.
The Service Provider does not knowingly target the App to, solicit data from, or market to children under the age of 13.
The App is not intended for use by anyone under 13.
The Service Provider does not knowingly collect personal information from children under 13.
If the Service Provider becomes aware that a child under 13 has submitted personal information, it will be promptly removed from its servers.
If you are a parent or guardian and believe your child has provided personal information, please contact the Service Provider at j70481562@gmail.com so that appropriate action can be taken.
The Service Provider takes reasonable measures to protect the confidentiality and security of your information.
Physical, electronic, and administrative safeguards are implemented to protect the data processed and maintained by the Service Provider.
This Privacy Policy may be updated periodically at the Service Provider’s discretion.
Any revisions will be posted on this page.
You are encouraged to review this policy regularly for updates.
Continued use of the App following any changes constitutes acceptance of the revised policy.
This policy is effective as of 2026‑03‑11.
By downloading and using the App, you consent to the collection and processing of your information as described in this Privacy Policy and any future updates.
If you have any questions or concerns regarding this privacy policy or the Service Provider’s data practices, please contact the Service Provider via email at:
j70481562@gmail.com