# Privacy Policy for Bd Meter Pro - Decibel Meter & AI Sound Identifier
**Last Updated:** August 19, 2026
**Effective Date:** August 19, 2026
**Application Name:** Bd Meter Pro (Decibel Meter & AI Sound Identifier Pro)
**Package / Bundle ID:** `com.decibelmeter.aisoundidentifier.app`
**Contact Email:** mobilebusiness1992@gmail.com
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## 1. Introduction
Welcome to **Bd Meter Pro** ("we," "our," or "us"). Bd Meter Pro is the premium, ad-free edition of our acoustic measurement and audio utility application, providing precision sound pressure level (dB SPL) monitoring, noise dosimeter exposure calculation, frequency and tone generation, and artificial intelligence-powered sound classification.
This Privacy Policy explains how **Bd Meter Pro** collects, uses, processes, and protects your information when you use the Application on Android and iOS devices.
We are built on a strict **Privacy-by-Design** foundation:
* **100% Ad-Free:** Bd Meter Pro contains zero third-party advertising SDKs or ad-tracking networks.
* **100% On-Device Processing:** All microphone audio analysis, decibel calculations, and AI sound classifications occur strictly on your device in real-time volatile memory (RAM).
* **Zero Audio/Photo Cloud Uploads:** We do not record, store, transmit, or sell your audio recordings, microphone streams, or camera images.
Please read this Privacy Policy carefully. By downloading, accessing, or using Bd Meter Pro, you understand and agree to the collection and use of information in accordance with this policy.
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## 2. Key Privacy Highlights at a Glance (Pro Edition)
| Feature / Data Type | Collected? | Stored on External Servers? | Shared with Third Parties? | Purpose |
| :--- | :--- | :--- | :--- | :--- |
| **Microphone / Audio** | Processed in real-time RAM | **No** (0% uploaded) | **No** | Decibel meter, dosimeter, frequency analysis, on-device AI sound classification |
| **Camera & Photos** | Processed locally on-device | **No** (0% uploaded) | **No** | Photo capture with sound level data overlay, saved to device gallery |
| **Advertisements / Ad Tracking** | **None** (100% Ad-Free) | **No** | **No** | No ad networks or advertising trackers in Pro |
| **Account / Login** | **No** | **No** | **No** | No account creation or registration required |
| **App Diagnostics & Crash Logs** | Yes (Anonymous / Aggregated) | Yes (Firebase Crashlytics) | Google / Firebase | Bug fixing, crash resolution, stability |
| **Usage Analytics** | Yes (Pseudonymous / Aggregated) | Yes (Firebase Analytics) | Google / Firebase | Feature performance and app optimization |
| **In-App Purchases / Subscriptions** | Yes (Transaction receipt / Entitlements) | Yes (RevenueCat / Apple / Google) | RevenueCat, Apple, Google | Unlocking Pro features, managing subscription status |
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## 3. Information We Collect and How We Use It
### A. Audio and Microphone Data (Core Pro Functionality)
* **What We Access:** Real-time raw PCM audio stream from your device's microphone.
* **How It Is Used:**
* **Precision Decibel Meter (dB Meter):** Calculates real-time sound pressure levels (SPL), peak levels, average decibel levels, and minimum/maximum readings.
* **Noise Dosimeter:** Computes occupational and environmental noise exposure, projected 8-hour Time-Weighted Average (TWA), and noise dose percentages (OSHA / NIOSH compliance metrics).
* **Frequency Meter & Tone Generator:** Analyzes acoustic frequencies and produces test tones across multiple waveforms.
* **AI Sound Classification (TensorFlow Lite / YAMNet):** Runs on-device machine learning inference against 521 acoustic classes in real-time.
* **Privacy Guarantee:**
* **100% Local In-Memory Processing:** Audio data is processed in volatile memory (RAM) in real time.
* **No Cloud Storage or Transmission:** The App **never** saves your raw audio to disk and **never** transmits audio over the network.
* **Immediate Discard:** Audio sample buffers are overwritten continuously and discarded immediately after calculation.
* **Active Use Only:** The microphone is active only while listening screens are in the foreground and stops immediately when leaving the screen.
### B. Camera and Photo Library Access
* **What We Access:** Device camera feed and write access to your device's photo gallery / media library.
* **How It Is Used:**
* **Camera Sound Overlay:** Displays a live camera preview allowing you to capture photos with embedded decibel HUD data, timestamps, and acoustic metrics.
* **Photo Gallery Access:** Saves the generated photo directly to your device's photo album.
* **Privacy Guarantee:**
* The camera stream and captured photos are processed locally on your device.
* We **do not** upload, transmit, or inspect your photos or camera stream on any external servers.
### C. In-App Purchases and Subscription Data (RevenueCat, Apple App Store, Google Play)
* **Transaction Processing:** All financial transactions, billing, and credit card information are processed directly and securely by Apple (App Store) or Google (Google Play Store). **We never receive, process, or store credit card or banking details.**
* **RevenueCat Integration:** We use RevenueCat to validate purchase receipts, manage Pro subscription renewals, and verify active Pro entitlements. RevenueCat assigns an anonymous App User ID to manage your Pro access across sessions.
### D. Device and Technical Information (Firebase Analytics & Crashlytics)
To maintain app reliability and resolve technical issues, the App automatically collects limited pseudonymous diagnostic data:
* **Device Model and Manufacturer:** (e.g., iPhone 15, Samsung Galaxy S24)
* **Operating System and Version:** (e.g., iOS 17.5, Android 14)
* **Application Version and Build Number**
* **Approximate Location:** Coarse country- or region-level data derived from truncated/anonymized IP addresses (IP addresses are not stored by us).
* **Usage Statistics:** Aggregated events such as feature usage frequency and screen navigation.
* **Crash Diagnostics:** Stack traces, memory state, and crash logs when an unhandled error occurs.
### E. Local Storage and Preferences
Bd Meter Pro stores configuration data locally on your device using `SharedPreferences` and encrypted secure storage (`flutter_secure_storage`):
* User preferences (e.g., custom calibration offsets, theme selection, audio weighting filters).
* Locally saved noise dosimeter logs and measurement session summaries.
* Encrypted Pro entitlement cache.
* This data remains strictly on your device and is permanently removed if you clear app data or uninstall the Application.
### F. Customer Support Communications
If you contact us via email at mobilebusiness1992@gmail.com, we collect the information you choose to provide (such as your email address, name, device model, and message content) solely to respond to your inquiry and provide technical assistance.
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## 4. No Third-Party Advertising in Pro
Bd Meter Pro is a premium, ad-free product:
* **Zero Ads:** We do not display banner, interstitial, rewarded, or app open ads.
* **No Advertising Trackers:** We do not include third-party advertising SDKs (such as AdMob) or track users for advertising purposes in the Pro tier.
* **No Data Brokerage:** We never sell, rent, or trade your personal data with third-party advertisers or data brokers.
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## 5. Legal Bases for Processing (EEA / UK GDPR)
For users residing in the European Economic Area (EEA), United Kingdom (UK), or Switzerland, our legal bases for processing data under the General Data Protection Regulation (GDPR) are:
1. **Consent (Art. 6(1)(a) GDPR):**
* Access to your device microphone, camera, and photo gallery.
* You may withdraw consent at any time via device settings.
2. **Performance of a Contract (Art. 6(1)(b) GDPR):**
* Providing Pro features, delivering app updates, and validating Pro subscription entitlements.
3. **Legitimate Interests (Art. 6(1)(f) GDPR):**
* Monitoring app stability, fixing bugs, and improving performance via Firebase Crashlytics and Analytics.
* Protecting against fraudulent activity, abuse, and security incidents.
4. **Legal Obligation (Art. 6(1)(c) GDPR):**
* Complying with applicable laws, regulatory requirements, or valid legal processes.
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## 6. Third-Party Service Providers and SDKs
We use a minimal set of trusted third-party service providers to support infrastructure, purchase validation, and app stability:
### 1. RevenueCat
* **Provider:** RevenueCat, Inc.
* **Purpose:** Pro subscription receipt validation and entitlement management.
* **Data Processed:** Anonymous user ID, App Store / Google Play purchase receipts, subscription expiration dates, transaction history.
* **Privacy Policy:** https://www.revenuecat.com/privacy/
### 2. Google Firebase (Analytics & Crashlytics)
* **Provider:** Google LLC / Google Ireland Limited
* **Purpose:** Crash diagnostics, performance monitoring, and aggregated feature analytics.
* **Data Processed:** Pseudonymous device identifiers, crash stack traces, app session events, operating system details.
* **Privacy Policy:** https://firebase.google.com/support/privacy
### 3. Apple App Store & Google Play Store
* **Providers:** Apple Inc. / Google LLC
* **Purpose:** Application distribution, Pro purchase processing, and refund management.
* **Apple Privacy Policy:** https://www.apple.com/legal/privacy/
* **Google Privacy Policy:** https://policies.google.com/privacy
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## 7. Device Permissions and Management
| Permission | Android Name | iOS Name | Why We Need It |
| :--- | :--- | :--- | :--- |
| **Microphone** | `android.permission.RECORD_AUDIO` | `NSMicrophoneUsageDescription` | Required for real-time sound measurement, frequency analysis, dosimeter exposure calculations, and on-device AI sound classification. |
| **Camera** | `android.permission.CAMERA` | `NSCameraUsageDescription` | Required to take photos with embedded decibel HUD / sound overlay data. |
| **Photo Library (Add Only)** | `android.permission.WRITE_EXTERNAL_STORAGE` (legacy) | `NSPhotoLibraryAddUsageDescription` | Required to save decibel-overlay photos directly to your device photo gallery. |
| **Notifications (Optional)** | `android.permission.POST_NOTIFICATIONS` | User Notification Authorization | Used to send noise exposure alerts or user-scheduled measurement reminders. |
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## 8. Data Retention and Deletion
* **Microphone & Camera Data:** **Zero retention.** Audio and camera frames are processed in volatile memory (RAM) and immediately discarded.
* **Local Settings and Data:** Saved on your device indefinitely until you clear application cache/storage, reset settings inside the App, or uninstall the Application.
* **Analytics and Diagnostic Data:** Retained by Google Firebase in accordance with standard retention policies (typically 2 to 14 months for analytics events, and 90 days for Crashlytics logs) before automated deletion.
* **Customer Support Data:** Support emails are retained only as long as necessary to resolve your request and maintain legitimate support records.
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## 9. Your Rights and Choices
Depending on your geographic location, you have specific statutory privacy rights:
### A. European Union (GDPR) & United Kingdom (UK GDPR) Rights
* **Right of Access:** You may request confirmation of whether we process your data and receive a copy.
* **Right to Rectification:** You may request correction of inaccurate personal data.
* **Right to Erasure ("Right to be Forgotten"):** You may request deletion of personal data held about you.
* **Right to Restrict or Object to Processing:** You may object to data processing based on legitimate interests.
* **Right to Data Portability:** You may request a structured, machine-readable copy of your personal data.
* **Right to Withdraw Consent:** Where processing is based on consent, you may withdraw consent at any time.
* **Right to Lodge a Complaint:** You have the right to lodge a complaint with your local Data Protection Authority (DPA).
### B. California Privacy Rights (CCPA / CPRA)
* **Right to Know:** You may request details about personal information collected, sources, and business purposes.
* **Right to Delete:** You may request deletion of personal information collected from you.
* **Right to Correct:** You may request correction of inaccurate personal information.
* **No Sale or Sharing:** We **do not sell or share** your personal information for monetary consideration or cross-context behavioral advertising.
* **Right to Non-Discrimination:** We will not discriminate against you for exercising your CCPA/CPRA rights.
### C. How to Exercise Your Rights
To exercise any of your privacy rights, please contact us at:
**Email:** mobilebusiness1992@gmail.com
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## 10. Children’s Privacy (COPPA & Global Compliance)
Bd Meter Pro is not directed to children under the age of 13 (or under 16 for residents of the EEA/UK), and we do not knowingly collect personal information from children.
If we learn that we have inadvertently collected personal data from a child under the minimum legal age without verified parental consent, we will promptly delete such information from our records. If you believe that a child has provided us with personal information, please contact us at mobilebusiness1992@gmail.com.
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## 11. Security of Your Information
We implement robust administrative, technical, and physical security measures:
* **Local Data Protection:** Sensitive local configurations and Pro cache use encrypted platform storage (iOS Keychain and Android KeyStore / EncryptedSharedPreferences).
* **Encrypted Network Communications:** All network interactions with third-party service providers (Firebase, RevenueCat) are enforced over encrypted HTTPS / TLS protocols.
* **No Remote Audio Storage:** Audio and camera inputs are processed strictly on-device in real time, eliminating the risk of cloud audio data breaches.
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## 12. App Store Privacy Declarations (Pro Edition)
### A. Google Play Data Safety Summary (Pro)
| Category | Data Type | Collected | Shared | Purpose |
| :--- | :--- | :--- | :--- | :--- |
| **Voice or Sound Recordings** | Audio recordings / Microphone | **No** (Processed ephemerally in RAM only) | **No** | Sound measurement, frequency analysis, dosimeter, AI classification |
| **Photos and Videos** | Photos / Camera | **No** (Processed locally on-device) | **No** | Photo overlay creation |
| **App Info and Performance** | Crash logs, Diagnostics | **Yes** | **Yes** (Google Firebase Crashlytics) | App functionality, analytics, bug fixing |
| **App Activity** | App interactions | **Yes** | **Yes** (Google Firebase Analytics) | Analytics, product improvement |
| **Device or Other IDs** | Device / Installation IDs | **No advertising IDs** | **No** | None |
| **Financial Info** | Purchase history | **Yes** | **Yes** (RevenueCat / Google Play) | Pro subscription and purchase validation |
### B. Apple App Store Privacy Nutrition Labels (Pro)
* **Data Used to Track You:** None (No tracking or third-party ads in Pro).
* **Data Linked to You:** None (No account registration).
* **Data Not Linked to You:**
* **Purchases:** Purchase history (for Pro subscription management via RevenueCat).
* **Usage Data:** Product interaction, feature usage (via Firebase Analytics).
* **Diagnostics:** Crash data, performance diagnostics (via Firebase Crashlytics).
* **Microphone & Camera:** Not Collected (processed locally in real-time).
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## 13. Changes to this Privacy Policy
We may update this Privacy Policy from time to time to reflect product enhancements, legal updates, or changes in service providers.
When updates are published:
* We will revise the **"Last Updated"** and **"Effective Date"** at the top of this document.
* Continued use of the Application signifies your acceptance of the updated terms.
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## 14. Contact Us and Data Controller
If you have any questions, suggestions, or concerns regarding this Privacy Policy or if you wish to exercise your legal privacy rights, please contact our Data Protection representative:
* **Application:** Bd Meter Pro - Decibel Meter & AI Sound Identifier
* **Contact Email:** mobilebusiness1992@gmail.com
* **Response Time:** We aim to respond to all inquiries within 30 days.
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*© 2026 Bd Meter. All rights reserved.*