Welcome to Lumina Book ("we," "our," or "us"). We are committed to protecting your personal privacy. This Privacy Policy explains how we collect, use, and safeguard your information when you use our book reading application.
To provide the best reading experience, we may collect the following types of data:
Device Information: We collect information such as your device model, operating system version to ensure app compatibility.
Usage Data: We track how you use the app, such as reading duration, features used, and crash logs to improve stability.
Local File Access (Crucial for Functionality): As a book reading application, our primary function is to allow you to open and read files (e.g., EPUB, PDF, TXT) stored on your device. We access these files solely to display the content to you within the app.
We use the collected data for the following purposes:
To scan your device storage and display your personal book library.
To save your reading progress (bookmarks) and preferences.
To synchronize data across multiple devices (if cloud features are enabled).
To detect and fix technical issues (bugs/crashes).
To display relevant advertisements (if the app is ad-supported).
The app requires specific permissions to function correctly:
Internet Access: Required to download book metadata (covers/descriptions), sync data, or load advertisements.
We may employ third-party companies to facilitate our service. These third parties have access to your Personal Data only to perform these tasks on our behalf:
Google Firebase: For analytics and crash reporting.
Google Gemini API (Generative AI): We use the Gemini API provided by Google to power the AI assistant features within the application (e.g., summarizing books, answering questions, or translation). When you interact with these features, the text or data you input (your "Prompts") is sent to Google's servers for processing.
We value your trust in providing us with your Personal Information, thus we are striving to use commercially acceptable means of protecting it. However, remember that no method of transmission over the internet is 100% secure.
Our Services do not address anyone under the age of 13. We do not knowingly collect personally identifiable information from children under 13.
Lastest update: 10 Dec 2025
We may update our Privacy Policy from time to time. Thus, you are advised to review this page periodically for any changes. These changes are effective immediately after they are posted on this page.
If you have any questions or suggestions about our Privacy Policy, do not hesitate to contact us at tunguyenanh.vn@gmail.com