Privacy Policy

Last Updated: August 17, 2026

1. Introduction

Welcome to Readible ("we," "our," or "us"). This Privacy Policy explains how we collect, use, disclose, and protect information when you use the Readible mobile application, website, and related services (together, the "App").

Some reading features run locally on your device. Other features, such as cloud text-to-speech, PDF parsing, recommendations, subscription and import quota enforcement, and video generation, require cloud processing. When a feature sends content to a cloud service, we use that content to provide the feature you requested.

2. Information We Collect

2.1 Account and Authentication Information

• Sign-in data: If you sign in with Google, Apple, or another supported provider, we receive account identifiers such as your user ID, email address, display name, and authentication provider details.
• Account status: We store account state needed to keep you signed in, manage deletion requests, and protect your account.

2.2 Subscription, Quota, and Purchase Information

• Subscription status: We use RevenueCat and the Apple App Store or Google Play Store to process subscriptions. We receive subscription events, product IDs, entitlement IDs, renewal status, and related purchase metadata.
• Usage and import quota: We store TTS character usage, video generation counts, Kindle import counts and reservation state, subscription tier, quota limits, period identifiers, and related usage-history metadata in Firebase/Firestore.
• Abuse prevention: We may generate and store hashed device fingerprints or similar device-derived identifiers to prevent repeated free-quota abuse across account deletion and re-registration.

2.3 Reading Content and Imported Files

• Local reading library: EPUB files, PDFs, text files, extracted articles, bookmarks, reading progress, downloaded audio, and generated clips may be stored locally on your device.
• Web article data: When you open, save, or share a web article, we may store the article URL, title, metadata, extracted text, thumbnail, and reading progress locally and, where needed for the feature, process the URL or article content through app services.
• Optional Kindle connection: If you choose Kindle import, Readible opens Amazon's website in an embedded browser. Amazon handles the sign-in page. The embedded browser stores cookies and session information on your device so the connection can work. Readible may read the library and book-rendering pages available to that signed-in session to import a selected book's title, author, Amazon Standard Identification Number (ASIN), cover reference, page locations, text, HTML, and images into your local reading library.
• Kindle quota records: Readible sends a one-way hash of the selected book's ASIN, a hashed device identifier, and import operation metadata to Firebase to enforce plan limits and allow previously imported books to be restored without consuming a new allowance. The backend does not receive the imported book's text, HTML, or images through the quota service.
• PDF and document processing: If you use cloud-backed PDF parsing or extraction, file content or derived text may be sent to our Cloud Functions or related processing services to convert it into readable text.
• OCR and images: If you import or scan images, the image may be processed locally by OCR tools and the recognized text may be saved in your reading library.
• On-device TTS model: If you use on-device Supertonic voices, the App may download model files from Hugging Face after installation. Speech synthesis runs locally on your device after the model is installed.
• Cloud TTS: If you choose cloud text-to-speech, text chunks, selected voice, and related synthesis request details are sent through our secure services and may be processed by DeepInfra to generate audio.
• Recommendations and AI features: If you use recommendation or AI-assisted features, relevant text, URLs, metadata, or prompts may be sent to services such as Google Gemini to generate the requested result.
• Video generation: If you generate video clips, selected text, prompt data, metadata, and generated media may be processed by our Cloud Run video generation service and stored locally or temporarily as needed to provide the feature.

2.4 Diagnostics, Analytics, and Device Information

• Analytics: We use Firebase Analytics to understand app usage, feature engagement, navigation events, import outcomes, reading and listening activity, and general performance. Analytics events may include feature names, content type, selected settings, duration or count buckets, Discover topics, and the domain name of a web page or article. We do not intentionally send imported document text, note text, search queries, or Amazon passwords to analytics.
• Crash and performance data: We use Firebase Crashlytics and Firebase Performance to collect crash reports, stack traces, logs, device model, operating system version, app version, performance traces, and diagnostic data needed to fix bugs and improve stability.
• Support and service communications: If you contact us, we collect your email address, message, and any information you choose to include. We may use your account email to send necessary account, subscription, security, privacy, or support messages. We do not currently use sign-in email addresses for promotional marketing.

2.5 Information We Do Not Sell or Intentionally Collect

• We do not sell your personal information.
• We do not collect precise location data for core reading features.
• We do not collect your contacts.
• We do not use your reading content for third-party advertising.
• We do not collect payment card numbers; subscriptions are processed by Apple, Google, RevenueCat, or the relevant payment provider.

3. How We Use Information

We use information to:

• Provide the App's reading, import, TTS, OCR, recommendation, video, subscription, and account features
• Authenticate users and protect accounts
• Track subscription tier, quota usage, and entitlement state
• Generate TTS audio, parse documents, extract article text, and generate requested media
• Save reading progress, bookmarks, history, settings, and local library state
• Save Discover interests and provide recommendations or personalized sections
• Prevent fraud, quota abuse, and unauthorized backend access
• Analyze app reliability, performance, and feature usage
• Debug crashes, errors, and support issues
• Respond to support requests and send necessary service communications
• Comply with legal obligations and enforce our Terms of Service

4. Data Storage and Retention

4.1 Local Storage

Many parts of your reading library are stored on your device, including imported files, Kindle book text and images, extracted articles, annotations, bookmarks, reading and listening history, progress, settings, cached audio, generated clips, and downloaded content. You can delete individual items in the App. Local data is also removed when the App removes the corresponding user library during account deletion, or when you uninstall the App, subject to device backup behavior controlled by your operating system.

4.2 Cloud Storage

Account, subscription, entitlement, quota, usage-history, Discover preference, diagnostic, and selected feature-processing records may be stored in Firebase, RevenueCat, Cloud Functions, Cloud Run, or related service infrastructure. Temporary processing data is retained only as needed to complete and troubleshoot the requested operation. Account and service records are retained while your account is active and for limited periods afterward when needed for security, fraud prevention, financial records, legal obligations, or reliable deletion workflows.

4.3 Account Deletion

You can request account deletion in the App. The deletion workflow removes your Firebase Auth account, user document, user-scoped preferences, usage history, Kindle reservations and account quota records, and the local user library. It also removes user-linked device contribution records. Anonymous or one-way-hashed device enforcement totals, purchase records held by Apple or RevenueCat, security logs, and backup records may remain where necessary for fraud prevention, legal compliance, financial recordkeeping, or system integrity. Account deletion does not cancel an App Store subscription.

5. Third-Party Services and Sharing

We share information with service providers only as needed to operate the App and provide requested features. These providers process information under their own terms and privacy policies.

• Firebase and Google Cloud: Authentication, Firestore data, Cloud Functions, Analytics, Crashlytics, Performance, hosting, and backend processing.
• RevenueCat: Subscription status, entitlement management, purchase events, and paywall support.
• Apple App Store and Google Play: Subscription purchase, renewal, refund, and billing management.
• Amazon: Optional Kindle website sign-in, library access, book rendering, and cover or book metadata when you choose Kindle import. Your use of Amazon remains subject to Amazon's own terms and privacy policy.
• DeepInfra: Cloud text-to-speech processing when you use cloud TTS features.
• Hugging Face: Hosting for downloadable on-device Supertonic model files.
• Google Gemini: Recommendation or AI-assisted features when you request those features.
• Cloud Run video services: Video clip generation when you request generated media.
• Cloudflare and Google email services: Routing and delivery of messages you send to our support and privacy addresses.

We may also disclose information if required by law, to protect rights and safety, to investigate abuse, or in connection with a merger, acquisition, financing, or sale of assets.

6. Security

We use reasonable technical and organizational safeguards, including HTTPS/TLS, platform authentication, Firebase security rules, scoped backend tokens, and limited access to production systems. No method of transmission or storage is perfectly secure, so we cannot guarantee absolute security.

7. Your Choices and Rights

7.1 Access, Correction, and Deletion

You may access or update some account, subscription, settings, and library information in the App. You may delete imported content and request account deletion through the App or by contacting us.

7.2 Account Deletion Steps

1. Open Readible.
2. Go to Settings or the account area.
3. Select "Delete Account."
4. Confirm deletion when prompted.

7.3 Analytics and Communications

You can contact us to ask privacy questions, object to analytics or other processing where applicable, or make a privacy request. Necessary messages related to your account, subscriptions, security, privacy request, or support may still be sent. If Readible introduces optional promotional email in the future, this policy and the relevant privacy disclosures will be updated before that processing begins.

8. International Data Transfers

We and our service providers may process information in countries other than your own. These countries may have privacy laws that differ from those in your jurisdiction.

9. Children's Privacy

Readible is not intended for children under 16 years of age. We do not knowingly collect personal information from children under 16. If you believe a child has provided us personal information, please contact us so we can take appropriate action.

10. California Privacy Rights

If you are a California resident, you may have rights to know, access, correct, delete, and opt out of certain uses of personal information. We do not sell or share your personal information for cross-context behavioral advertising. To exercise rights, contact us at privacy@readible.net.

11. European and UK Privacy Rights

If you are in the EEA, UK, India, or a similar jurisdiction, you may have rights to access, correct, delete, restrict, object to, withdraw consent to, or port your personal data. You may also have the right to complain to the relevant authority. To exercise rights, contact us at privacy@readible.net.

12. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. When we do, we will update the "Last Updated" date above and post the updated policy at this URL.

13. Contact Us