Microphone input
Decibel Dial: Sound Meter uses microphone access only while measuring sound. Samples are processed on the device to calculate sound-level estimates, including current level, minimum, maximum, average, Leq, peak and history.
The app does not save, upload or share raw microphone audio.
Saved sessions
When you record a session, the app stores timestamped sound-level samples and summary statistics locally on that device. Optional names, location labels and notes are also stored locally. The app retains the newest 50 sessions and removes the oldest session when that limit is exceeded.
Android app backup is disabled. On iOS, saved-session and interrupted-recording directories are excluded from device backup and use iOS file protection. These controls reduce unintended cloud copies but do not affect files that you have already exported elsewhere.
The app does not require an account or include advertising. Saved-session data is not transmitted to the publisher or a remote server.
Trial, subscription and lifetime purchases
When in-app billing is enabled, Apple or Google handles checkout. The planned purchase-verification flow sends the store proof, product identifier, store environment, a random installation identifier and request nonce over HTTPS to the publisher’s verification service, which checks current ownership, expiry and refund status with the store and returns a signed access record. This policy will be reviewed against the exact billing-enabled release before paid distribution.
No payment-card details, microphone audio, readings, saved-session content or diagnostic identifiers are sent to this service. A verified subscription record never extends beyond the store-reported expiry. Delete all local data removes the local access record and Quick Check throttle, but it does not cancel a subscription, refund a purchase or delete store records. Manage or cancel subscriptions through the store; restore uses the same store account.
The three-day trial is store-account managed. The separate local 10-second Quick Check allowance can reset after clearing app data or reinstalling and is not a paid entitlement. The verification service does not intentionally log purchase proofs; hosting access logs may process IP and network metadata.
Optional diagnostics
The app includes Firebase Crashlytics and Analytics on supported Android, iOS and Huawei builds. These services remain disabled unless you opt in to Share optional diagnostics in Measurement settings. You can opt out again at any time. Diagnostics are pseudonymous, not anonymous.
When enabled, Firebase may process crash stack traces, app version, operating-system and device model information, automatic app-lifecycle events, coarse feature events, technical installation, app-instance, Crashlytics or session identifiers, network metadata and coarse country or region inferred from that metadata.
The app does not add raw microphone audio, dB readings, saved-session samples or statistics, session timestamps, names, location labels, notes, filenames, export contents, microphone route names, account identifiers, email addresses or phone numbers to those reports.
The Firebase SDKs include supporting components such as Firebase Installations, Firebase Sessions, Remote Config infrastructure and Google Data Transport. The app does not use Remote Config to change product behavior. Google acts as a diagnostic service provider under Firebase’s terms.
Advertising identifier collection, Apple identifier-for-vendor collection, ad-personalization signals and automatic screen reporting are disabled by the app.
Retention and deletion
The newest 50 saved sessions remain on the device until you delete them, clear the app’s data or uninstall the app. Individual sessions can be deleted from Saved sessions.
Delete all local data removes sessions, interrupted-recording recovery, temporary reports, settings, local purchase-verification state, the Quick Check throttle, unsent crash reports, local Analytics state and the Firebase installation identifier. It does not cancel or delete store transactions. Microphone permission remains controlled by the operating system, and previously shared files remain with their destination.
Turning off Share optional diagnostics stops future app-enabled diagnostic collection. Records already transmitted to Firebase remain subject to the publisher’s configured retention and Google’s product-specific retention. Because the app has no account and does not send names, email addresses or phone numbers, the publisher cannot locate a diagnostic record by your identity.
Accuracy and safety
Results are consumer sound-level estimates. Phone microphones, cases, automatic input processing, input routes and device position can affect results. Decibel Dial: Sound Meter is not a certified sound-level meter and is not intended for regulatory, legal, occupational-compliance or emergency decisions.
Children’s privacy
The app is not directed to children. Optional pseudonymous diagnostics use the same opt-in and deletion controls for every user.
Changes
Material policy changes will be published here with a revised effective date before the related app update is released.
Contact and support email
Fadi Hanna is the individual publisher of Decibel Dial: Sound Meter. For privacy questions or support, email support@proappcenter.com. When you email us, your email provider and our mail provider process your address, message, and delivery metadata so we can reply and resolve the request. We delete resolved support correspondence within 24 months after resolution, unless a longer period is needed for a legal obligation or dispute. You may request earlier deletion by emailing the same address, subject to those exceptions. Do not send recordings, precise addresses, credentials or diagnostic identifiers.