Sound Meter – Noise Level dB

Indie Apps Lab

About this app

Sound meter app Calm dB is a clean, accurate and easy-to-use sound level meter for real-time noise measurement.
Whether you want to check room loudness, monitor environmental noise, or test sound levels around you, Calm dB provides fast, reliable readings with a minimal, calming interface designed for everyday use.

KEY FEATURES
• Accurate real-time dB measurement
• Smooth live noise chart for instant visual feedback
• Min / Avg / Max values for every session
• Session history stored safely on your device
• Export to CSV or JSON for further analysis
• Calibration tools to improve measurement accuracy
• Keep the screen on during long measurements
• Modern, distraction-free minimal design
• Works fully offline
• No data tracking. No accounts. No unnecessary permissions.

PRIVACY-FIRST
Calm dB does not record audio or collect personal data. All measurements stay on your device. The app uses Firebase Crashlytics to collect anonymous crash data to improve stability.

PERFECT FOR
• Checking noise levels at home and work
• Monitoring environmental sound outdoors
• Sleep environment testing
• Device and equipment noise testing
• Everyday curiosity and sound exploration

Enjoy a calm, precise and beautifully designed sound measurement experience.

What’s new

• Improved UI and overall user experience
• Added new localization languages
• Introduced auto-start measurement option
• Integrated Firebase Crashlytics for better stability
• Bug fixes and performance improvements