Privacy Policy for PDF Voice: Read Aloud & Audio
1. Overview & Applications Covered
This Privacy Policy describes how MedTech Labs handles information in connection with the application PDF Voice: Read Aloud & Audio (referred to in this document as "the Application" or "the Service").
This policy applies exclusively to PDF Voice: Read Aloud & Audio across its supported platforms (android) with Android Package identifier: com.pdfvoice.app.
2. Developer & Publisher Identity
The Application is published and operated by:
- Publisher / Organization: MedTech Labs
- Legal Entity: MedTech Labs
- Official Website: https://instantbiodata.in
- Dedicated Privacy Contact: medtech.publisher@gmail.com
3. Information Collection & Practices
Below is the verified inventory of data practices and permissions processed in connection with PDF Voice: Read Aloud & Audio:
No Remote Data Collection
Processed Locally OnlyThe application functions completely on-device without collecting or transmitting user data to external servers.
Data Types: No personal identifiers, No location data, No biometric data
User Control: Users can clear all stored library documents, reading bookmarks, and audio playback settings at any time via Android system settings or within the app's library management screen.
Local On-Device Storage
Processed Locally OnlyImported PDF file references, reading progress bookmarks (current page, paragraph index, and scroll position), text-to-speech voice selections, playback speeds, and visual reading themes (Light, Dark, Sepia) are stored locally in your device's private SQLite database and sandboxed application storage.
Data Types: Scoped file URIs and file names of imported documents, Reading progress bookmarks (last active page and sentence tracking index), Text-to-speech preferences (playback speed rate 0.75x–2.0x, selected voice engine, and pitch), Visual appearance preferences (Light, Dark, Sepia reading modes and font scaling)
User Control: Users can remove individual books from their library with one tap, or reset 100% of stored application data via Android Settings → Apps → PDF Voice → Storage → Clear Data.
Scoped Document Access (Android Storage Access Framework)
Processed Locally OnlyWhen you import a document, the application uses Android's native system document picker (Storage Access Framework) to obtain temporary or persistent read permission for that specific file only. The application never scans your full device storage, does not request broad all-files access permissions, and never transmits document contents off your device.
Data Types: User-selected PDF documents, textbooks, or study materials, Scoped document content URIs granted via system document picker
User Control: Users explicitly choose each document via the system file picker and can remove documents from the in-app library at any time.
On-Device Text-to-Speech Synthesis (Android TTS Engine)
Processed Locally OnlyText extraction and speech synthesis are executed 100% on your local device hardware using Android's native TextToSpeech APIs (such as Google Speech Services or system voice engines). No document text, sentence extracts, or generated audio files are ever sent to cloud speech servers or third-party AI endpoints.
Data Types: Extracted text strings from user-selected PDF pages, Locally synthesized speech audio streams
User Control: Voice selection, pitch, and playback rate can be adjusted or stopped at any time via the player controls or settings.
Foreground Service & Notification Playback Controls
Processed Locally OnlyTo enable uninterrupted background audiobook listening when your screen is locked or while multitasking in other apps, PDF Voice utilizes an Android Foreground Service (FOREGROUND_SERVICE_MEDIA_PLAYBACK) with lock-screen notification controls (POST_NOTIFICATIONS) and a system wake lock.
Data Types: Playback status (playing, paused, stopped), Current document title and chapter/page indicator
User Control: Notification controls can be dismissed by pausing/stopping playback or managed via Android notification permissions.
4. Analytics & Technical Diagnostics
PDF Voice: Read Aloud & Audio does not embed or include any third-party advertising, analytics, or telemetry SDKs (such as Google Analytics or Firebase Crashlytics).
Basic, anonymized operating system level crash and performance diagnostics may be processed directly by Google Play or Apple in accordance with your device's global operating system diagnostic settings. These diagnostics do not contain user identities or personal documents, reading history, or audio playback data.
5. User Accounts & Registration
PDF Voice: Read Aloud & Audio does NOT require registration, login, or user account creation. The Application functions entirely without user accounts, authentication profiles, or login credentials.
6. Data Retention Policy
All imported document metadata, reading bookmarks, and playback preferences are stored exclusively on your physical device under your direct control. We operate zero cloud databases, remote servers, or external user repositories.
Retention Criteria: Data is retained locally until you manually remove the document from your library, clear the application storage in system settings, or uninstall the application.
Backup & Storage Scope: No remote cloud copies, server backups, or external archives of your documents or reading positions are ever created or maintained by us.
7. Data Deletion & User Control Rights
In compliance with Google Play User Data policies and international privacy standards, users have clear control over their data:
Local Device Storage Model: Because PDF Voice: Read Aloud & Audio operates without remote user accounts and does not transmit or store personal content on external servers, there is no remote server-side profile data to delete.
Immediate Local Data Deletion: Users can delete any individual document and its reading progress directly from the Library screen, or permanently wipe 100% of stored records by going to Android Settings → Apps → PDF Voice → Storage → Clear Data, or by uninstalling the application.
For questions or assistance regarding data controls, contact our privacy desk at medtech.publisher@gmail.com.
8. Children's Privacy (COPPA & Google Play Families Policy)
General Audience Application: PDF Voice: Read Aloud & Audio is an offline document reader and text-to-speech listening utility designed for general audiences aged 13 and older, including students, professionals, commuters, and book enthusiasts. The Application is not directed toward children under 13.
We do not knowingly solicit or collect personal information from children under 13 years of age.
The application processes documents and synthesizes speech completely offline on the user's physical device. It collects zero personal information, requires no account registration, and transmits no document contents or reading habits to remote servers. If you believe an individual under 13 has submitted personal information through support communications, please contact us immediately.
If you are a parent or guardian and believe your child has provided us with personal information without appropriate consent, please contact us immediately so we can promptly take corrective action.
9. Data Security & Protection
We employ industry-standard administrative, physical, and technical safeguards designed to protect your information from unauthorized access, alteration, or disclosure:
- 100% offline-first architecture with zero remote server endpoints or cloud uploads
- Scoped document access strictly limited to user-chosen files via Android Storage Access Framework (SAF)
- Secure local on-device persistence utilizing Expo SQLite and Android application sandbox isolation
- Native on-device speech synthesis via Android TextToSpeech APIs without third-party network transmission
- Zero third-party advertising SDKs, behavioral trackers, or analytics telemetries embedded in release builds
10. Changes to this Privacy Policy
We may periodically update this Privacy Policy to reflect changes in software features, platform SDKs, or regulatory requirements. Any modifications will be posted to this page with an updated revision date.
Last reviewed and updated: 2026-10-03.
11. Contact Information
If you have questions, feedback, or privacy-related requests concerning PDF Voice: Read Aloud & Audio, please contact our privacy team: