Effective Date: 2025
App Name: PDF Viewer
Contact Email: luoliying219@gmail.com
We take user privacy and data protection very seriously. This Privacy Policy explains how we collect, use, store, and protect your information when you use the PDF Viewer app. Please read and understand this policy carefully before using this app.
1. Information Collection
During your use of this app, we may collect the following information:
Device Information
Including device model, operating system version, unique device identifier, network information, device language, time zone, etc.
This information is used for app optimization, advertising, and analytics.
Usage Information
Including your app usage behavior, click history, and feature usage.
This is used to improve the product experience and troubleshoot.
Stored File Information
Because this app includes PDF document viewing and management features, we need access to your device's file storage.
Permission Description: android.permission.MANAGE_EXTERNAL_STORAGE
We only access PDF files with your authorization and will not upload or share your private files.
Advertising and Analytics Information
We have integrated the Ad SDK and Firebase services. These third-party services may collect device information related to advertising, such as advertising identifiers and usage habits.
2. Information Use
The information we collect will be primarily used for the following purposes:
Providing and optimizing PDF document viewing and management services;
Improving user experience and app performance;
Delivering personalized ads and measuring ad effectiveness;
Performing data analysis and app crash diagnosis;
Complying with laws, regulations, and regulatory requirements.
3. Third-Party Services
This app integrates advertising and analytics services, including but not limited to:
TopOn
Vungle
UnityAds
Ironsource
Pangle
Facebook Audience Network
Admob
AppLovin
Chartboost
Firebase (an analytics and notification service provided by Google)
These third parties may collect device information, usage behavior, and other data for advertising, statistics, and analytics. Please note that the collection and use of data by third parties is subject to their own privacy policies.
4. Children's Privacy
This app is intended for users aged 13 and above.
We do not intentionally collect personal information from children under 13.
If we discover that we have accidentally collected information from users under 13, we will immediately delete it.
If guardians discover that their children have used this app without their consent, please contact us immediately (email: luoliying219@gmail.com).
5. Permission Description
android.permission.MANAGE_EXTERNAL_STORAGE: Used to access and manage user PDF documents.
This permission is only used for app functionality and is not used for purposes unrelated to functionality.
6. Data Security
We implement reasonable security measures to protect your data from unauthorized access, alteration, disclosure, or destruction.
Please understand that due to the limitations of Internet technology, no transmission or storage method can be guaranteed to be 100% secure.
7. Data Sharing and Transfer
Unless you have your consent, we will not sell or rent your personal data to any unrelated third party.
We may disclose your information if required by law or in response to a lawful request from a government agency.
In the event of a merger, acquisition, or asset transfer, user data may be transferred as part of the transaction, but we will continue to protect your privacy.
8. User Rights
You have the following rights:
Check whether we have collected information about you;
Request deletion of your personal data (except as otherwise provided by laws and regulations);
Withdraw any permissions you have granted. However, please note that some features may not function properly after you withdraw them.
9. Policy Updates
We may update this Privacy Policy from time to time based on legal, business, or service changes.
We will prominently display updates within the app or notify you through version updates.
Please check back regularly for the latest updates.
10. Contact Us
If you have any questions or suggestions regarding this Privacy Policy, please contact us through the following methods:
Email: luoliying219@gmail.com