Sound Meter - Audio Analyzer
dB Noise Meter, FFT & Reports
Only for iPhone
Free · In‑App Purchases
iPhone
Measure noise, find what's humming, prove it got quieter and share a PDF report. Calibrate against a reference meter. No ads, no account, audio never recorded.
Turn your iPhone into a smart sound measurement tool: measure noise, find frequencies, compare changes and create reports.
Most sound meters just show a number. Sound Meter tells you what it means and what to do next.
MEASURE
• Live dB with A, C and Z weighting and Fast, Slow or Impulse response
• Average (Leq), minimum, maximum and peak, with a 60-second graph
• Plain answers: "43 dBA · Quiet, like a library"
• Guided modes for Noise, Machine, Speaker and Room set everything up for you
FIND
• Spectrum analyzer with the dominant frequency and likely sources ("126 Hz · Low hum — check fans, compressors, fridges")
• Tap to pick any frequency, pinch to zoom, freeze and peak hold
• Find mode: lock a frequency, walk around and follow "Getting louder" to the source
COMPARE
• Save sessions and measure Before / After from the same spot
• See exactly what changed: "Noise reduced −8.5 dBA average, largest change at 125 Hz"
• Great for HVAC work, soundproofing, speakers, fans and machines
REPORT
• PDF measurement report with levels, graph, spectrum, events, device, microphone and calibration
• CSV data and PNG image export
MONITOR
• Set a threshold and get notified when noise stays above it
• Event log with times and maximum levels, even while the phone is locked
NUMBERS YOU CAN TRUST
• Calibration wizard: match a reference meter or acoustic calibrator in a minute
• Measurement Quality shows why a reading is Good, Fair or Poor — clipping, noise floor, microphone route, calibration
• USB measurement microphones and wired headsets supported
ALSO
• RTA in 1/1 and 1/3 octave bands
• Tone generator: sine, pink noise, white noise and sweeps
PRIVATE BY DESIGN
Audio is analyzed live on your iPhone. It is never recorded, stored or sent anywhere. No ads, no account, no tracking.
PRO — ONE-TIME PURCHASE
Find mode, Before / After, noise monitor, PDF and CSV export, 1/3-octave RTA, unlimited sessions, calibration for every microphone and the full generator. Pay once, no subscription.
Sound Meter is a measurement reference, not a certified sound level meter (IEC 61672). For legal or occupational compliance, use a certified instrument.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://bmit-mob.web.app/sound-meter/privacy-policy.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Nguyen SonTung, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nguyen SonTung
- Size
- 4.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 30 more
- English, Arabic, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Persian, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Sound Meter Pro $9.99
- Copyright
- © BMIT MOB, LLC
