Professional
Decibel Metering
for iPhone

Accurate, beautiful, and honestly priced. Real-time sound level measurement with IEC 61672-based frequency weighting filters, session recording, and CSV export.

Download on the App Store
A / C / Z
Weighting Modes
30 fps
Live Gauge
$3.99
One-Time Buy
Sound Gauge Pro live meter showing 42.1 dB reading with arc gauge

Everything You Need in a Decibel Meter App

Real-Time Decibel Metering

Live dB readings at 30 frames per second with an animated arc gauge. Switch between A, C, and Z frequency weighting with a tap. Min, average, and peak stats update continuously.

Noise Dose
Live OSHA/NIOSH exposure tracking with TWA and projected 8-hr dose
Dynamic Island
Live Activity shows current dB on lock screen and Dynamic Island
Apple Health
Session averages written as Environmental Sound Levels automatically
Background Audio
Recording continues when you switch apps or lock your screen

Session Recording

Record sound levels over time. Review sessions with interactive charts and summary statistics — peak, average, min, duration, and reading count.

Session recording detail showing a coffee shop noise chart with peak 62.1 dB and average 53.2 dB

CSV Export

Share your measurements as CSV files for analysis in any spreadsheet app, MATLAB, or Python.

TIMESTAMP, DB_A, DB_C, PEAK
1710934802.01, 42.1, 44.5, 48.2
1710934802.02, 41.9, 44.2, 47.9

Calibration

Calibrate against a reference source for improved accuracy. iPhone microphones have an inherent ~3 dB tolerance — we're transparent about that. For tighter results, use an external reference mic.

IEC 61672
Weighting Standard
±3 dB
Mic Tolerance

Coming Soon

Home Screen Widget Apple Watch Shortcuts

Professional Sound Level Meter.
Personal Price.

$3.99
one-time purchase

No ads. No subscriptions. No tracking.
Just precise, honest metering for life.

Get Sound Gauge Pro

Available exclusively on the iOS App Store