Privacy Policy — DeviceLab Audiophile

This Privacy Policy ("Policy") describes how Strategia-X ("we," "us," or "our") collects, uses, and protects information in connection with the DeviceLab Audiophile Android application ("the App"). We are committed to protecting your privacy and being transparent about our data practices.

By installing and using the App, you acknowledge that you have read and understood this Policy. If you do not agree with our practices, please uninstall the App.

Developer: Strategia-X / Rocky Stack
Package Name: com.devicelab.audiophile
Contact: [email protected]

DeviceLab Audiophile is a professional audio analysis toolkit for Android built with Kotlin and Jetpack Compose. It transforms your device into a comprehensive audio measurement instrument, providing tools including a decibel (SPL) meter, spectrum analyzer, real-time analyzer (RTA), spectrogram, oscilloscope, THD measurement, SNR measurement, frequency response testing, impulse response capture, room acoustics analysis, waterfall/CSD display, speaker and microphone testing, Bluetooth and USB audio latency testing, multi-channel and channel balance testing, frequency and noise generators, calibration tools, and PDF/CSV report export.

Minimum Android Version: Android 7.0 (API 24)
Target Android Version: Android 16 (API 36)

2.1 Audio Data (Processed Locally Only)

The App accesses your device's microphone to perform audio analysis. All audio data is processed entirely on your device in real-time. Audio is NOT recorded, stored persistently, transmitted to our servers, or shared with any third party.

• Microphone Input — Real-time audio captured through your device's built-in or connected microphone for analysis by the decibel meter, spectrum analyzer, RTA, spectrogram, oscilloscope, THD measurement, SNR measurement, frequency response, impulse response, room acoustics, and waterfall/CSD features. Audio data exists only in memory during active analysis and is discarded when you stop measuring or leave the feature.
• Audio Routing Information — Which audio devices are active (built-in speaker, headphones, Bluetooth, USB DAC) for the audio device info and testing features. No audio content from these devices is captured beyond what you explicitly measure.

2.2 Data Stored Locally on Your Device

The following data is stored in a local Room database and DataStore on your device and is never transmitted to our servers:

• Calibration Data — Custom microphone calibration profiles you create to improve measurement accuracy. Stored in the local database.
• Saved Measurements — Audio measurement results (SPL readings, spectrum data, THD values, frequency response curves, impulse responses, room acoustics metrics) that you explicitly choose to save via the Reports feature.
• Exported Reports — PDF and CSV files generated from your measurements, stored in your device's shared storage or app-specific directory.
• User Preferences — App settings including theme preference (dark/light mode), measurement units, weighting selections, display preferences, and notification settings, stored in Jetpack DataStore.

2.3 Data Collected by Third-Party Services

The App uses Google AdMob to display advertisements. AdMob may collect the following information as governed by Google's Privacy Policy:

• Advertising Identifier — Your device's advertising ID for ad personalization and measurement.
• General Location — Country or region-level location data (not precise GPS coordinates) for regionally relevant advertisements.
• Device Information — Device model, operating system version, and screen size for ad formatting and targeting.
• Ad Interaction Data — Impressions, clicks, and engagement metrics for ad performance measurement.

The App also uses the Google User Messaging Platform (UMP) to obtain your consent for personalized advertising in compliance with GDPR and CCPA requirements.

2.4 Data We Do NOT Collect

The App does not collect, transmit, or store:

• Audio recordings (microphone input is processed in real-time only, never recorded)
• Personal identification information (name, email, address, phone number)
• GPS location or location history
• Contacts, call logs, SMS messages, or communication data
• Photos, videos, or camera data
• Documents or personal file contents (only audio measurement files you create)
• Browsing history, search queries, or internet activity
• Passwords, credentials, PINs, or authentication data
• Biometric data
• Keystroke logging or input monitoring
• Data from other applications' internal storage
• Music library contents, playlists, or listening history

Because DeviceLab Audiophile uses the device microphone extensively, we want to be completely transparent about how audio data is handled:

What We DO With Audio Data

• Process microphone input in real-time to calculate SPL levels, frequency spectra, THD, SNR, and other acoustic measurements
• Display real-time audio visualizations (waveforms, spectra, spectrograms, waterfall plots)
• Generate measurement results that you can optionally save as reports
• Use audio output to generate test tones and noise signals through your speakers

What We DO NOT Do With Audio Data

• Record or persistently store any audio from the microphone
• Transmit audio data to any server (ours or third-party)
• Use audio for voice recognition, speech-to-text, or conversation monitoring
• Share audio data with advertisers, data brokers, or any third party
• Analyze audio content (speech, music) — only acoustic properties (levels, frequencies, distortion)
• Run the microphone in the background when not actively measuring

Your audio data never leaves your device. Microphone access is used exclusively to provide the measurement tools you requested. The microphone is only active when you are on a measurement screen and have started a measurement. Audio data exists only in volatile memory and is discarded immediately when measurement stops.

All locally collected data is used exclusively for the following on-device purposes:

• Audio Measurement and Analysis — Processing microphone input to display decibel levels, frequency spectra, RTA bands, spectrograms, oscilloscope waveforms, THD percentages, SNR ratios, frequency response curves, impulse responses, room acoustic metrics, and waterfall/CSD plots.
• Signal Generation — Generating test tones (sine, square, triangle, sawtooth) and noise signals (white, pink, brown, blue, violet) through your device's audio output for speaker testing and room measurement.
• Device Testing — Testing speakers, microphones, Bluetooth audio devices, USB audio interfaces, multi-channel systems, and channel balance using locally generated and measured signals.
• Calibration — Applying your custom microphone calibration profiles to improve measurement accuracy across all analysis features.
• Reports and Export — Generating PDF and CSV reports from saved measurements for your own use, stored on your device.
• Preferences — Remembering your theme, weighting, display, and measurement preferences between sessions.

Third-party advertising data collected by Google AdMob is used solely for serving advertisements and measuring ad performance. We do not have access to or control over AdMob's data collection beyond the configurations we set.

The App requests the following permissions. Each is used solely for the purpose described:

• RECORD_AUDIO — Required for all audio analysis features (decibel meter, spectrum analyzer, RTA, spectrogram, oscilloscope, THD, SNR, frequency response, impulse response, room acoustics, microphone test). Audio is processed in real-time only and is never recorded or transmitted.
• MODIFY_AUDIO_SETTINGS — Required to configure audio routing and playback settings for the frequency generator, noise generator, speaker test, and audio latency test features.
• BLUETOOTH / BLUETOOTH_ADMIN / BLUETOOTH_CONNECT — Required for the Bluetooth latency test and Bluetooth audio device testing features. Only Bluetooth audio device names and latency measurements are displayed; no other Bluetooth data is accessed.
• READ_EXTERNAL_STORAGE — Required on Android 12 and below for accessing audio files for analysis. On newer versions, scoped access is used.
• READ_MEDIA_AUDIO — Required on Android 13+ for accessing audio files for analysis. Replaces READ_EXTERNAL_STORAGE on newer versions. No audio file contents are transmitted.
• FOREGROUND_SERVICE / FOREGROUND_SERVICE_MEDIA_PLAYBACK — Required for the audio monitoring foreground service, which allows audio analysis to continue when the screen is off or another app is in the foreground during extended measurements.
• POST_NOTIFICATIONS — Required on Android 13+ to display measurement completion notifications and foreground service status.
• VIBRATE — Used for haptic feedback on UI interactions.
• INTERNET / ACCESS_NETWORK_STATE — Required for Google AdMob ad delivery. No audio or measurement data is transmitted over the network.

You can revoke any permission at any time through your device's Settings app. Revoking the microphone permission will disable all audio analysis features but will not affect signal generators, device information, settings, or saved reports.

• Local Room Database — Calibration profiles and saved measurement results are stored in a local Room (SQLite) database within the App's private storage directory, protected by Android's application sandboxing.
• DataStore Preferences — User settings are stored using Jetpack DataStore in the App's private storage.
• Exported Files — PDF and CSV reports are stored in your device's shared storage (Downloads or Documents) or the App's file provider directory, accessible through standard Android file management.
• Audio Data in Memory — Microphone input and audio analysis buffers exist only in volatile RAM during active measurement. No audio is written to persistent storage.
• No Cloud Storage — The App does not upload, sync, or back up any data to cloud services, remote servers, or third-party storage providers.
• No Audio Transmission — Audio data captured by the microphone is never transmitted over the network. The INTERNET permission is used exclusively for AdMob ad delivery.
• Application Sandboxing — Android's built-in application sandbox ensures that the App's database and preference files are isolated from other applications.
• User Control — You can clear all App data at any time through Android Settings > Apps > DeviceLab Audiophile > Storage > Clear Data. Uninstalling the App removes all stored data except exported PDF/CSV files in shared storage.

7.1 Libraries That Do Not Collect Data

• Jetpack Compose — Android's modern UI toolkit. Does not collect or transmit data.
• Room Persistence Library — Local SQLite database. All data remains on-device.
• Jetpack DataStore — Local preferences storage. All data remains on-device.
• Kotlin Coroutines — Asynchronous programming framework.
• Material Design 3 — UI component library.

7.2 Libraries That May Collect Data

• Google AdMob — Advertising SDK. Collects device information, advertising identifiers, and interaction data as described in Section 2.3. See Google's Privacy Policy.
• Google User Messaging Platform (UMP) — Consent management SDK for advertising consent dialogs in compliance with GDPR and CCPA.
• Google Play Services — Required for core app functionality and updates. See Google's Privacy Policy.

The App displays advertisements through Google AdMob. You have the following choices:

• Personalized vs. Non-Personalized Ads — A consent dialog (powered by Google UMP) will ask whether you consent to personalized advertising. You may choose non-personalized ads at any time.
• Opt Out of Ad Personalization — Go to Android Settings > Google > Ads > enable "Opt out of Ads Personalization."
• Reset Advertising ID — Periodically reset your advertising ID in the same settings menu to disassociate future ad interactions from past activity.

We do not sell your personal information. Ad-related data collection is governed by Google's privacy practices.

We do not share, sell, rent, trade, or disclose any audio data, measurement results, calibration profiles, or any other data collected locally by the App to any third party, for any purpose, under any circumstances. Since your audio and measurement data remains on your device and is never transmitted to us, we do not have access to it.

The only third-party data sharing occurs through Google AdMob (advertising identifiers and device information) and Google Play Services as described in this Policy. These are governed by Google's Privacy Policy.

10.1 General Rights

You have direct control over all data through your device:

• Access — All saved measurements and calibration data are viewable within the App's Reports and Calibration screens.
• Deletion — Delete individual measurements within the App, or clear all App data via Android Settings > Apps > DeviceLab Audiophile > Storage > Clear Data, or uninstall the App.
• Control — Revoke any permission at any time through Settings > Apps > DeviceLab Audiophile > Permissions.
• Microphone — Revoke microphone permission to completely disable audio capture. Signal generators and saved reports remain accessible.
• Ad Preferences — Control personalized advertising via the Google UMP consent dialog or Android advertising settings.
• Export — Use the Reports feature to export your measurement data as PDF or CSV before deletion.

10.2 California Residents (CCPA/CPRA)

If you are a California resident, you have the following rights under the California Consumer Privacy Act (CCPA) and the California Privacy Rights Act (CPRA):

• Right to Know — You have the right to know what personal information is collected. This Policy provides that disclosure.
• Right to Delete — Delete all locally stored data by clearing App data or uninstalling. For AdMob data, contact Google directly.
• Right to Opt-Out of Sale/Sharing — We do not sell your personal information. AdMob's practices are controlled via consent dialogs and device settings.
• Right to Non-Discrimination — We will not discriminate against you for exercising your privacy rights.
• Right to Correct — You may request correction of inaccurate personal information.
• Right to Limit Use of Sensitive Personal Information — The App does not collect sensitive personal information as defined by the CPRA. Audio captured by the microphone is acoustic measurement data, not personal communications or recordings.

To exercise your rights, contact us at [email protected]. We will respond to verifiable consumer requests within 45 days as required by law.

10.3 EEA, UK, and Swiss Residents (GDPR)

For audio data and measurement results processed locally on your device, we do not act as a data controller or processor under GDPR because the data never leaves your device and we have no access to it. You maintain full, exclusive control.

For data collected by Google AdMob and Google Play Services, Google acts as an independent data controller. The legal basis is your consent (provided through the UMP consent dialog). You may withdraw consent at any time. Your GDPR rights (access, rectification, erasure, restriction, portability, objection) regarding Google's data should be exercised directly with Google.

10.4 Other Jurisdictions

Residents of Virginia (VCDPA), Colorado (CPA), Connecticut (CTDPA), Brazil (LGPD), and other jurisdictions with comprehensive privacy laws can manage locally stored data directly on their device as described in Section 10.1. For third-party service data, exercise rights through Google's privacy controls.

The App is a professional audio measurement tool designed for audio engineers, musicians, and audio enthusiasts, and is not directed at children under the age of 13. We do not knowingly collect personal information from children. Because the App stores data locally and does not require account registration, there is no direct collection of children's personal information as defined by COPPA. Advertisements displayed through AdMob are served in compliance with Google's child safety policies. The App does not contain in-app purchases or social features.

In accordance with Google Play's Data Safety requirements:

• Data collected: Audio (processed in real-time on-device only, not stored or transmitted). Advertising identifiers and device information (collected by Google AdMob).
• Data shared with third parties: Advertising data shared with Google AdMob only.
• Data handling is secure: Audio data is processed in volatile memory only. Saved measurements are stored within Android's application sandbox. Ad data uses encrypted connections.
• Data can be deleted: Users can delete all local data by clearing App storage or uninstalling.

Since all audio and measurement data processing occurs locally on your device, no international data transfers of your personal information occur through our App. Third-party services (Google AdMob, Google Play Services) may transfer data internationally according to their own privacy policies and in compliance with applicable data transfer mechanisms (Standard Contractual Clauses, adequacy decisions, etc.).

We may update this Privacy Policy from time to time. When we make changes, we will update the "Last updated" date at the top of this page. For material changes, we will provide notice through the App, the Google Play Store listing, or on our website. Your continued use of the App after any changes constitutes acceptance of the updated Policy.

If you have questions or concerns about this Privacy Policy, contact us at:

Strategia-X
Email: [email protected]
Website: strategia-x.com

For privacy-specific inquiries, please include "Privacy Policy" in your email subject line. We aim to respond to all privacy-related inquiries within 10 business days.