Epubly

Privacy Policy

Last updated: January 2025

1. Introduction

Welcome to Epubly. We respect your privacy and are committed to protecting your personal data. This privacy policy explains how we collect, use, and safeguard your information when you use our AI-powered book translation service.

2. Information We Collect

2.1 Account Information

  • Email address (for authentication and notifications)
  • Display name (optional)
  • User ID (automatically generated)
  • Subscription plan and payment information (via LemonSqueezy)

2.2 Files and Content

  • Books you upload for translation (EPUB, PDF, TXT files)
  • Translated books we generate
  • Book metadata (title, author, language)

2.3 Usage Data

  • Translation history and statistics
  • Credit usage and remaining balance
  • Service usage patterns and preferences

3. How We Use Your Information

  • To provide and maintain our translation service
  • To process your book translations using AI models (Google Gemini, OpenAI)
  • To manage your subscription and credits
  • To send you service notifications and updates
  • To improve our service and user experience
  • To detect and prevent fraud or abuse

4. Data Storage and Security

We use industry-standard security measures to protect your data:

  • Firebase Storage: Your uploaded and translated books are stored securely with Google Firebase
  • Firestore Database: User profiles and translation records are encrypted at rest
  • Temporary Storage: Files are automatically deleted after 24 hours
  • Secure Authentication: Firebase Authentication with encrypted credentials

5. Third-Party Services

We use the following third-party services that may collect and process your data:

  • Google Firebase: Authentication, storage, and database services
  • Google Gemini AI: AI translation processing
  • OpenAI: Alternative AI translation processing
  • LemonSqueezy: Payment processing and subscription management
  • Resend: Email notification service

Each service has its own privacy policy and data handling practices. We recommend reviewing their policies.

6. Data Retention

  • Uploaded Files: Automatically deleted after 24 hours
  • Translated Files: Automatically deleted after 24 hours
  • Translation Records: Stored for up to 90 days for history purposes
  • Account Data: Retained until you delete your account

7. Your Rights

Under GDPR and other privacy laws, you have the right to:

  • Access your personal data
  • Correct inaccurate data
  • Request deletion of your data
  • Export your data
  • Object to data processing
  • Withdraw consent at any time

To exercise these rights, contact us at privacy@epubly.io

8. Cookies and Tracking

We use essential cookies for authentication and session management. We do not use advertising or tracking cookies. Your browser settings can control cookie preferences.

9. Children's Privacy

Our service is not intended for children under 13 years of age. We do not knowingly collect personal information from children under 13.

10. International Data Transfers

Your data may be transferred to and processed in countries outside your residence. We ensure appropriate safeguards are in place to protect your data in compliance with applicable laws.

11. Changes to This Policy

We may update this privacy policy from time to time. We will notify you of any changes by posting the new policy on this page and updating the "Last updated" date.

12. Contact Us

If you have any questions about this privacy policy or our data practices, please contact us: