Privacy Policy for Our Mobile Apps

Last updated: August 27, 2026

This Privacy Policy explains how our mobile apps collect, use, store, and protect information when you use them. It currently covers Liquid Cup Puzzle and PDF Professor, both developed and published by the same developer. This page is intended to support app store listings and in-app privacy links for these products.

1. App and Developer Identification

• Covered apps: Liquid Cup Puzzle and PDF Professor
• Developer / publisher: Developer of Liquid Cup Puzzle and PDF Professor
• Contact email: Yuhk00104@gmail.com

2. Information We Collect

Our apps do not require you to create an account, and we do not ask you to provide personal information such as your name, home address, phone number, or account password.

Liquid Cup Puzzle may store gameplay-related information locally on your device, such as level progress, sound settings, haptic settings, and unfinished game progress. This local information is used only to provide core game features, such as saving progress and continuing a previous game session.

PDF Professor is a local document reader and PDF utility. When you choose files in the app, PDF Professor may handle the selected documents, images, or office files so it can open, preview, convert, merge, split, compress, rotate, sign, watermark, encrypt, decrypt, or export them. The app may store local document metadata such as file name, file type, file size, document URI, page count, last opened time, last reading page, favorite status, selected language, and display preferences. Document contents are processed to provide the requested feature and are not intentionally uploaded by the current version of the app.

3. Permissions and Device Features

Our apps may use limited device features only when needed for app functionality. Depending on the app and the feature you use, these may include:

• Vibration access, to provide optional haptic feedback during gameplay.
• Document and file access, when you select PDFs, Word documents, images, or other supported files through the Android system file picker. PDF Professor may keep read access to files you explicitly choose so it can reopen recent documents.
• Photos or media access through the system picker, when you choose images for features such as Image to PDF. The app is intended to access only files you select.
• Downloads and storage access, to create generated PDFs, images, or document exports in the system Downloads folder and to list files generated by PDF Professor.
• Open with and share actions, when you choose to open or share an output file with another app. In that case, Android may grant the selected receiving app temporary access to the chosen file.
• Network or browser access, when opening external web pages such as privacy policy, feedback, rating, or app store links.
• System backup, depending on your Android device settings. App preferences or locally stored metadata may be included in system-managed backups if device backup is enabled.

PDF Professor does not include document scanning in the current version and does not request camera access for scanning. Our apps do not request access to your contacts, microphone recordings, or precise location for their core features.

4. How We Use Information

Information handled by the app may be used only to:

• Provide and maintain the gameplay or document experience.
• Save your progress, recent documents, reading position, and in-app preferences on your device.
• Open user-selected files and restore recent reading sessions.
• Process selected documents locally for PDF tools such as merge, split, compress, convert, sign, watermark, encrypt, and decrypt.
• Save generated output files to the system Downloads folder.
• Support sound and haptic feedback settings.
• Maintain app stability and basic functionality.

Passwords entered for PDF encryption or decryption are used to complete the selected local operation. They are not intentionally stored as app settings or sent to a server by the current version.

5. Third-Party Services

Based on the current versions, our apps are intended to function mainly with local device storage for gameplay, document handling, generated files, and settings. If third-party services are added in a future version, such as analytics, advertising, crash reporting, cloud storage, or payment tools, their use will be governed by their own privacy practices and this Privacy Policy may be updated accordingly.

6. Data Sharing

We do not sell your personal information. In the current versions, gameplay progress, document metadata, preferences, and PDF processing results are stored locally on your device and are not intentionally shared with third parties by the app itself.

When you choose to share, export, or open a document with another app, the selected file may be handled by the receiving app under that app's own privacy practices.

7. Data Retention

Gameplay progress, settings, recent document metadata, and reading history stored locally on your device remain there until you clear the app data, reset the relevant settings, or uninstall the app. Files generated by PDF Professor may remain in your system Downloads folder until you delete them yourself through the app, a file manager, or Android system storage tools.

8. Children's Privacy

Our apps are intended for a general audience. We do not knowingly collect personal information from children.

9. Security

We use reasonable measures to protect information associated with the app. However, no method of electronic storage or transmission over the internet is completely secure, and we cannot guarantee absolute security.

10. Your Choices

You can clear local gameplay progress, recent document metadata, and settings by clearing the app data or uninstalling the app through your Android device settings. You may delete generated PDF Professor output files from the Downloads folder at any time. You may also disable sound or vibration features in app settings where available.

11. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated "Last updated" date. Continued use of our apps after changes are posted means you accept the updated Privacy Policy.

12. Contact Us

If you have any questions about this Privacy Policy or about our apps, please contact Developer of Liquid Cup Puzzle and PDF Professor at Yuhk00104@gmail.com.