Decibel Meter: dB & Noise

Measure sound levels, follow changes over time and keep a clear record of each session.

See live estimated dBA readings with a responsive sound display and comparisons to familiar everyday sounds. Explore A, C and Z weighting, Fast and Slow response, or switch to digital dBFS.

Look closer with octave-band frequency views, peak hold and a sound-level history. Review minimum, maximum and energy-average levels, plus noise-exposure estimates with their measurement assumptions.

Record audio, name sessions, add notes and listen back with a waveform. Set a recording timer or continue an active recording with the screen locked. Optionally add your current location.

Capture a photo or short video with the measured level and time. The camera documents the scene; it does not locate sound sources. Export PDF reports, CSV data or the recorded audio.

The live meter is free. Decibel Pro unlocks recording, saved sessions, visual records and reports. No account required. Recordings stay on your device unless you share them.

Subscriptions renew automatically unless canceled at least 24 hours before the period ends. Payment is charged to your Apple Account. Manage subscriptions in your App Store account settings. Introductory offers are for eligible subscribers only.

Readings and noise-exposure estimates depend on the microphone, device, calibration and environment. They are for general information, not certification, compliance or medical assessment. Use a calibrated sound level meter when verified accuracy is required.

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