Privacy Policy for Decibel Pro - dB Sound Meter

Effective Date: October 2026

Last Updated: October 2026

Application: Decibel Pro - dB Sound Meter ("App", "Application", "Service")

Developer: Digispark Developer ("we", "us", or "our")

At Digispark Developer, we place the highest priority on user privacy and data security. This Privacy Policy outlines our strict policies and practices regarding how your personal information and device telemetry are handled when you use Decibel Pro - dB Sound Meter for iOS.

1. 🛡️ 100% LOCAL ON-DEVICE AUDIO PROCESSING (ZERO AUDIO TRANSMISSION)

Because Decibel Pro is designed to measure sound pressure levels (decibels, dB SPL) and calculate acoustic frequency spectrums (via Fast Fourier Transform / FFT), it requires authorization to access your device's built-in microphone.

OUR LEGAL AND TECHNICAL PRIVACY GUARANTEE:

Zero Audio Eavesdropping or Recording: Raw audio signals, voice conversations, acoustic ambient recordings, and microphone streams are NEVER recorded, stored to persistent disk, monitored, or transmitted over the internet to any external server or third-party entity.
Volatile Device Memory Only (RAM): The application captures audio buffers exclusively into volatile memory (RAM) and immediately discards them after mathematical transformation using Apple's native, privacy-preserving AVFoundation and Accelerate digital signal processing (DSP) APIs.
No Speech or Voice Recognition: The Application contains no voice-to-text algorithms, biometrics, or speech recognition modules. It does not parse or decipher human conversation.

2. 📊 MEASUREMENT LOGS & LOCAL DATA STORAGE

If you choose to use the noise session recording feature:

Only calculated numerical telemetry (e.g., date, session duration, minimum/average/maximum decibel numbers, and user-typed custom notes) is stored.
Sandboxed Local Storage: This data is saved strictly inside your device’s private local sandbox.
Full User Control: You maintain 100% ownership and control over your measurement logs. You may export them as CSV or text files, share them, or permanently delete them at any time. We have no access to your session records or telemetry.