Note: SoundMeter has been replaced by the new SoundMeter X and will no longer be updated. You will be able to continue to use SoundMeter as long as you run it on a device with a compatible version of iOS. SoundMeter X offers powerful new features. You can download it for free and try out the Pro features for free for up to 7 days.

*** Research points to SoundMeter as the best sound level meter app available on any mobile platform:
“The evidence suggests that for A-weighted data, SoundMeter is the app best suited for occupational and general purpose noise measurements. In addition to having the smallest mean difference for the A-weighted data, SoundMeter had the narrowest distribution of differences.” — Kardous and Shaw, “Do Sound Meter Apps Measure Noise Levels Accurately?”, Sound & Vibration, July 2015

*** Many other sound level apps give unreliable results.

SoundMeter turns your iOS device into a handheld sound level meter (SLM) with support for exponential-time-weighted sound level (Lp) and equivalent sound level (Leq) measurements with various time and frequency weightings. The built-in signal generator tool can be used for generating calibration test tones, noise, chirps, or other periodic signals. SoundMeter also offers additional upgrades via in-app purchase, including a noise dosimeter and whole or 1/3-octave spectrum measurements.

- Apple Watch app for remote monitoring and control from your wrist.
- Exponential-time-weighted (Lp) and equivalent (Leq) sound levels.
- Flat, A, or C frequency weighting.
- Time-weighted measurement options include Fast, Slow, and Impulse weightings.
- Instantaneous peak and maximum sound levels.
- Save high-resolution sound level display images to PDF files or to the device’s Camera Roll photo album. Descriptive text may be added to the image before it is saved.
- SoundMeter also offers data sharing via photo and email.
- Calibration controls enable automatic sensitivity calibration, relative to a calibrated sound level meter, or manual entry of the microphone sensitivity.
- Screen rotation to any orientation.
- Octave-band SLM (whole or 1/3-octave) and Noise Dosimeter tools are available within SoundMeter via in-app purchase.
- A data acquisition upgrade is also available via in-app purchase, which includes an http server for downloading PDF files exported from any of the analysis tools. It also enables CSV, TXT, and MAT file export.
- Data logging functionality is available in SoundMeter via in-app purchase. Data logging is supported by the Sound Level Meter and Noise Dosimeter (sold separately).
- Octave (and 1/3-octave) data logging functionality is available for the Octave tool (sold separately) via in-app purchase.
- Percentile-exceeded sound levels (L10, L50, L90, Lx) can be enabled via in-app purchase. Percentile-exceeded sound levels are supported by the Sound Level Meter and Octave analyzer (sold separately).

With the built-in or headset microphone, SoundMeter can measure peak sound levels of up to approximately 130 dB. Results may vary between iOS devices and headset microphones. External microphones may enable the measurement of much higher sound levels.

The built-in and headset microphones are suitable for certain, basic sound level measurements, but high precision external microphones may also be used with appropriate audio accessory hardware. Even though default sensitivity values are included for the built-in and headset microphones, for best results, SoundMeter should be calibrated before use. Sound levels may be off by a few dB when using the default microphone sensitivity.

NOTE: SoundMeter has been designed to meet or exceed ANSI or IEC standards for sound level meters. However, these standards require conformance of the entire measurement system, including hardware, software, and microphone. Contact a qualified acoustical testing laboratory for information regarding standards certification.

What's New

Version 8.4.7

SoundMeter has been replaced by SoundMeter X. This is the last update.
SoundMeter X is a free download and offers powerful sound analysis tools via in-app purchase.

Ratings and Reviews

Okay app, useless in-app purchases


The app is okay as a pure sound meter. Nothing else.

Do NOT buy the in-app purchases, they are very expensive for absolutely ridiculous functionality. I bought "Data Logging Upgrade" and "Data Acquisition Support" to be able to do a full recording of the sound levels in my car on my way to work. All the app does with these two $20 extensions (each), is show a 30 second graph of the data in app and record the last 30 seconds of your whole recoding time into CSV. Not even the location is stored with each data point, you get a single full timestamp and one location point. It's a total rip-off. My recommendation is to not buy this application at all and find other alternatives with less brazen "upgrades".

Fantastic Start


This app is a great start. I have it working within 1dB of a RadioShack meter and within 3dB of a Norsonic for most sound sources. This would easily be a fife star app if apple would open up a line in or digital in through the dock connector so that measurement mics could be attached. Adding a trigger function and reverb time calculation would also be a welcome addition. Other than those minor requests, this app is well worth the money.

Surprisingly Accurate


While this won’t replace my trusty old Simpson analog, it was surprisingly accurate. Within 1.5dB of my idling diesel truck and 2dB of my (very loud) alarm clock. Will need to test it some more, however, it is really handy to have. Also the price is perfectly set for such a good well thought out and bug free app!


Faber Acoustical, LLC
11 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2018 Faber Acoustical, LLC
In-App Purchases
  1. Octave Analyzer RTA Tool $19.99
  2. Data Logging Upgrade $19.99
  3. Data Acquisition Support $19.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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