Privacy Policy

Effective Date: November 20, 2025
Last Updated: November 20, 2025

Introduction

Audion ("we," "our," or "the app") is a hearing personalization and assistance application developed to provide real-time audio enhancement, noise suppression, and clinical-grade audiometry testing. This Privacy Policy explains how Audion collects, uses, stores, and protects your information.

By using Audion, you agree to the collection and use of information in accordance with this policy.

1. Information We Collect

1.1 Audio Data

Audion requests microphone permission (RECORD_AUDIO) to provide the following features:

• Real-time audio processing: Capture ambient audio for noise suppression, audio enhancement, and hearing assistance
• Hearing tests (Audiometry): Conduct clinical-grade pure tone audiometry tests to measure hearing thresholds across multiple frequencies (125Hz - 8000Hz)
• Calibration: Measure Most Comfortable Level (MCL) and Uncomfortable Loudness Level (UCL) for personalized audio profiles
• Speech recognition: Provide real-time captions and transcription features using offline speech recognition
• Focus Mode: Identify and enhance specific voices in noisy environments using speaker diarization

Important: All audio processing is performed locally on your device. Audio data is not transmitted, uploaded, or stored on any external servers.

1.2 User Profile Information

• Name: Optional user name for personalization of hearing profiles
• Hearing Test Results: Audiometry thresholds, calibration data, and hearing profiles stored locally on your device
• App Settings: User preferences including noise removal settings, amplification levels, and selected hearing profiles

1.3 Device Permissions

Audion requests the following Android permissions:

• RECORD_AUDIO: Required for microphone access (hearing tests, audio processing, captions)
• MODIFY_AUDIO_SETTINGS: Required for audio routing and volume control
• FOREGROUND_SERVICE: Enables continuous audio processing while the app is in use
• FOREGROUND_SERVICE_MEDIA_PLAYBACK: Allows real-time audio playback for hearing assistance
• VIBRATE: Provides haptic feedback during user interactions
• READ_EXTERNAL_STORAGE (Android 12 and below): Access to music files for enhanced audio playback
• READ_MEDIA_AUDIO (Android 13+): Access to music files with scoped storage
• INTERNET: Used only for accessing the privacy policy and help documentation (no data transmission)

2. How We Use Your Information

2.1 Audio Processing

All audio captured through the microphone is processed in real-time on your device for:

• Noise reduction using Mozilla RNNoise technology
• Hearing compensation and personalized audio amplification
• Speech recognition and live captioning (using Vosk offline models)
• Audiometry testing and calibration measurements

Audio data is never recorded, saved, or transmitted beyond temporary in-memory processing buffers.

2.2 Hearing Test Results

• Test results from audiometry and calibration procedures are stored locally in an encrypted SQLite database on your device
• Results are used to create personalized hearing profiles and audio compensation settings
• You maintain full control over your test data and can export results as PDF reports

2.3 App Functionality

• User settings and preferences are stored locally using Android SharedPreferences
• Hearing profiles enable switching between different listening scenarios (e.g., music, conversation, quiet environments)

3. Data Storage and Security

3.1 Local Storage Only

Audion operates as a fully offline application:

• All data is stored exclusively on your device using Android's secure app-specific storage
• No personal information, audio data, or hearing test results are transmitted to external servers
• No account registration or cloud sync is required

3.2 Data Security

• Hearing test results and user profiles are stored in a password-protected SQLite database using Android Room persistence library
• All processing occurs within the app's secure sandbox environment
• Audio buffers are cleared immediately after real-time processing

3.3 Data Retention

• Your data remains on your device until you uninstall the app or manually delete test results
• Uninstalling Audion will permanently remove all locally stored data

4. Third-Party Services

Audion uses the following third-party technologies, all of which operate offline:

4.1 Offline Speech Recognition

• Vosk (by Alpha Cephei): Offline speech-to-text engine for live captions
• Model files are bundled with the app and run entirely on-device
• No audio or transcription data is sent to external servers

4.2 Noise Suppression

• Mozilla RNNoise: Deep learning-based noise reduction
• Neural network runs locally on your device
• No audio data is transmitted

4.3 Analytics and Tracking

Audion does NOT use any analytics, crash reporting, or tracking services. We do not collect usage statistics, telemetry, or diagnostic data.

5. Data Sharing and Disclosure

Audion does not share, sell, rent, or disclose your personal information or audio data with any third parties.

5.1 No Data Transmission

• No audio recordings are transmitted over the internet
• No personal information is uploaded to external servers
• The app operates entirely offline (except for accessing this privacy policy)

5.2 Legal Compliance

We may disclose information if required by law, such as in response to a valid court order or subpoena. However, because all data is stored locally on your device, we have no access to your information.

6. Children's Privacy

Audion is not directed to children under the age of 13. We do not knowingly collect personal information from children. If you are a parent or guardian and believe your child has provided information to the app, please contact us, and we will assist with deletion.

7. Your Rights and Choices

7.1 Access and Control

• You have complete control over your data stored within Audion
• You can view, export, or delete hearing test results at any time within the app
• You can revoke microphone permissions in your device settings (Settings → Apps → Audion → Permissions)

7.2 Data Deletion

• To delete all app data: Go to device Settings → Apps → Audion → Storage → Clear Data
• Uninstalling the app will permanently remove all stored information

8. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices or for legal compliance. Updates will be posted at:

https://www.audion.live/privacy

We will notify users of significant changes through an in-app notification. Your continued use of Audion after changes constitutes acceptance of the updated policy.

9. International Users

Audion is designed for global use. Since all data is stored locally on your device, no international data transfers occur. Users in the European Economic Area (EEA), UK, and other jurisdictions maintain full control of their data in accordance with GDPR and other privacy regulations.

10. Google Play Store Compliance

This privacy policy meets Google Play Store requirements for apps using sensitive permissions:

• RECORD_AUDIO: Used exclusively for hearing assistance, audiometry testing, and speech recognition as described above
• Personal Data: Only stored locally; never transmitted or shared
• Prominent Disclosure: Permission requests include clear explanations of usage

11. Contact Information

If you have questions, concerns, or requests regarding this Privacy Policy or your data, please contact us:

12. Summary of Key Points

• ✅No data collection: All processing happens on your device
• ✅No internet transmission: Audio and personal data never leave your device
• ✅Full user control: You own and control all your hearing test data
• ✅Offline operation: Speech recognition and noise reduction work without internet
• ✅No tracking: No analytics, ads, or third-party tracking
• ✅Clinical privacy: Hearing test results stored securely on-device only
• ✅Transparent permissions: Clear explanations for all permission requests