Privacy Policy

Clarify — Ebook Reader with Comprehension Assistance
Last updated: February 22, 2026

            Summary: Clarify stores your books and reading progress locally on your device. When you use AI-powered features (word meanings, text simplification, explanations), selected text is sent to our server and processed using Google Gemini. We do not require an account, do not sell your data, and do not use advertising trackers.
        

1. Information We Collect

Data stored locally on your device:

Books: EPUB files you import are copied to the app's private storage on your device.
Reading progress: Current chapter, scroll position, and completion percentage for each book.
Simplification cache: Previously simplified text passages are cached locally to avoid redundant processing.
App preferences: Theme mode, font size, and auto-simplify settings.

Data sent to our servers:

Text selections: When you use the Word Meaning, Simplify, or Explain features, the selected text and its surrounding context are sent to our server for AI processing. This data is not stored on our server after the response is returned.
Book metadata: The book title and author name are sent alongside text selections to help the AI provide contextually accurate responses.

Analytics data:

We use Firebase Analytics to collect anonymous usage data such as which features are used, reading session duration, and general app interaction patterns.
This data is not linked to your identity — we do not require user accounts or collect personal identifiers.
Analytics data helps us understand how the app is used so we can improve it.

2. How We Use Your Information

Providing AI features: Text you select is processed through Google's Gemini AI to generate word definitions, simplified text, and explanations.
Improving the app: Anonymous analytics help us identify popular features and areas for improvement.
Maintaining functionality: Reading progress and preferences are stored to provide a seamless reading experience.

3. Third-Party Services

Clarify uses the following third-party services:

Google Gemini API: Processes text for AI-powered comprehension features. Text selections are sent through our proxy server to Google's Gemini API. Google's privacy policy applies to their processing of this data: https://policies.google.com/privacy
Firebase Analytics (Google): Collects anonymous usage statistics. Firebase's data processing terms apply: https://firebase.google.com/support/privacy

4. Data Retention

Local data: Books, reading progress, and cached simplifications remain on your device until you delete a book or uninstall the app.
Server-side: Our proxy server does not log or store the text you send for AI processing. Requests are forwarded to Google Gemini and discarded.
Analytics: Firebase Analytics retains anonymized usage data according to Google's standard retention policies.

5. Data Sharing

We do not sell, rent, or share your personal data with third parties. Data is only shared with:

Google Gemini: Selected text, solely for the purpose of providing AI comprehension features.
Firebase Analytics: Anonymous usage data, solely for the purpose of app improvement.

6. Data Security

All communication between the app and our server uses HTTPS encryption.
Book files and reading data are stored in the app's sandboxed storage, accessible only to Clarify.
Our proxy server does not store API keys on the client side — all AI API authentication is handled server-side.

7. Your Rights and Choices

Delete your data: You can delete individual books (and their associated reading progress and cached simplifications) from the library screen. Uninstalling the app removes all local data.
Use offline: Core reading functionality works without an internet connection. AI features require connectivity but are entirely optional.
Opt out of analytics: You can limit analytics collection by enabling "Limit Ad Tracking" (iOS) or opting out of personalized ads (Android) in your device settings.

8. Children's Privacy

Clarify is not directed at children under the age of 13. We do not knowingly collect personal information from children. Since the app reads user-imported EPUB files, parents and guardians should monitor the content children access through the app.

9. Changes to This Policy

We may update this privacy policy from time to time. Changes will be reflected on this page with an updated "Last updated" date. Continued use of the app after changes constitutes acceptance of the updated policy.

10. Contact Us

If you have questions or concerns about this privacy policy or your data, please contact us at:

Email: clarifybooks1104@gmail.com