Decibel Meter Sound Level dB2.5 - App Store

Decibel Meter: Sound Level & Noise Detector

Professional Sound Meter & Noise Dosimeter for iPhone.

Turn your device into a precision sound level meter (SPL meter). Trusted by safety officers, acoustic engineers, and thousands of users, Decibel Meter delivers lab-quality noise monitoring with an elegant, intuitive interface.

Whether you are checking noise levels for OSHA workplace compliance, recording evidence for noise complaints, or analyzing audio frequencies, this is your all-in-one pocket tool.

=== KEY FEATURES ===

PROFESSIONAL NOISE DOSIMETER
. OSHA & NIOSH Standards: Accurately track daily noise exposure dose.
. Hearing Safety: Monitor TWA (Time Weighted Average) to prevent hearing loss.
. Real-Time Analysis: Instant, high-precision dB(A), dB(C), and dB(Z) measurements.

VIDEO & EVIDENCE RECORDING
. Video Overlay: Record video with real-time decibel levels embedded-perfect proof for noisy neighbors or construction sites.
. Photo Snapshots: Capture measurement screens with timestamp, location, and max dB tags.
. GPS Tagging: Automatically map your noise measurements to specific locations.

ADVANCED ANALYSIS & REPORTING
. Spectrum Analyzer (RTA): Visualize sound frequencies (FFT) to identify annoying noise sources.
. PDF Export: Generate professional reports with charts, statistics, and exposure data in seconds.
. History Log: Save unlimited session data for long-term environmental monitoring.

POWERFUL TOOLS
. Calibration: Fine-tune microphone sensitivity for professional-grade accuracy.
. Background Mode: Continue measuring and logging data even when the app is closed.
. Multiple Views: Switch between Waveform, Digital, Analog Gauge, and Spectrum views.
. Reference Chart: Compare current noise levels with real-world examples (e.g., "Subway Train," "Whisper").

Download Decibel Meter today and measure the world around you with precision!

=== Subscription options ===
The app is free to download, but to access premium features, a subscription is required. With the subscription, you'll enjoy uninterrupted access to our premium features. Your subscription will automatically renew at the end of each term, and your credit card will be charged through your iTunes account within 24 hours before the end of the current period.

If you wish to cancel the automatic renewal of your subscription, you can do so at any time by accessing your iTunes account settings. However, please note that refunds will not be provided for any unused portion of the term. To ensure a successful cancellation, please make sure to turn off auto-renewal at least 24 hours before the end of the current period.

Terms of use: https://decibelmeter.andyrgb.com/terms
Privacy Policy: https://decibelmeter.andyrgb.com/privacy

Feedback? Contact us at: andychung.cc@gmail.com

Version History Major Update! We’ve completely rebuilt key parts of the app to be faster, more stable, and feature-rich.

NEW PROFESSIONAL TOOLS:
• Noise Dosimeter: Monitor noise exposure with NIOSH/OSHA compliant
standards for workplace safety.
• PDF Reports: Generate and export professional reports with detailed charts
and measurement data.
• Video Recording: Record video with a real-time decibel level overlay for
evidence documentation.
• Spectrum Analyzer: Visualize frequency distribution in real-time.
• GPS Location: Automatically tag your measurements with location data.

PERFORMANCE BOOST:
• Faster: App launch and real-time monitoring are now 50% faster.
• More Stable: Reduced crash rates by over 70% for rock-solid reliability
during long sessions.
• Battery Efficient: Optimized energy usage provides 30% longer battery life
for extended monitoring.

IMPROVEMENTS:
• New UI: Refined "Detailed" and "Compact" views for better readability.
• Dosimeter Logic: Improved measurement accuracy and isolation from standard
recording.
• Enhanced audio playback in recording history

Update now to experience the most powerful Decibel Meter yet! 2.5 Jun 2 Major Update! We’ve completely rebuilt key parts of the app to be faster, more stable, and feature-rich.

NEW PROFESSIONAL TOOLS:
• Noise Dosimeter: Monitor noise exposure with NIOSH/OSHA compliant
standards for workplace safety.
• PDF Reports: Generate and export professional reports with detailed charts
and measurement data.
• Video Recording: Record video with a real-time decibel level overlay for
evidence documentation.
• Spectrum Analyzer: Visualize frequency distribution in real-time.
• GPS Location: Automatically tag your measurements with location data.

PERFORMANCE BOOST:
• Faster: App launch and real-time monitoring are now 50% faster.
• More Stable: Reduced crash rates by over 70% for rock-solid reliability
during long sessions.
• Battery Efficient: Optimized energy usage provides 30% longer battery life
for extended monitoring.

IMPROVEMENTS:
• New UI: Refined "Detailed" and "Compact" views for better readability.
• Dosimeter Logic: Improved measurement accuracy and isolation from standard
recording.
• Enhanced audio playback in recording history

Update now to experience the most powerful Decibel Meter yet! 2.4 Feb 4 We've supercharged your sound meter experience!

NEW FEATURES:
• Noise Dosimeter: NIOSH/OSHA compliant exposure monitoring for workplace safety
• PDF Report Export: Generate professional reports with charts and measurements
• Video Recording: Capture video with real-time dB overlay for evidence documentation
• Spectrum Analyzer: Visualize frequency distribution in real-time
• Location Tagging: GPS coordinates for environmental noise mapping

IMPROVEMENTS:
• Stability improvements and bug fixes
• Performance Boost: 40-60% faster app launch and smoother real-time monitoring
• Battery Optimization: Up to 30% longer battery life during extended recording sessions
• UI Refinements: Polished interface across Compact, Detailed, and Classic display modes

Update now for the most reliable and efficient sound monitoring experience! 2.3 10/28/2025 - Stability improvements and bug fixes
- New Logo 2.2 04/18/2025 - Stability improvements and bug fixes
- New Logo 2.1 01/22/2025 - Stability improvements and bug fixes
- New Logo 2.0 08/18/2024 - Stability improvements and bug fixes 1.9 08/08/2024 - Stability improvements and bug fixes 1.8 03/19/2024 - Stability improvements and bug fixes 1.7 01/16/2024 - Performance Improvements 1.6 09/24/2023 - Performance Improvements 1.5 07/26/2023 - Performance Improvements 1.4 06/20/2023 - Performance improvements. 1.3 05/14/2023 - Improved user interface
- Language Support
- Traditional Chinese 1.2 12/20/2022 - bug fixed. 1.1 04/11/2022 1.0 02/28/2022