AudioTools application logo

AudioTools is a suite of professional-grade audio and acoustic analysis apps. Included in the price of this app is a great collection of professional tools -- SPL, RTA, FFT, Speaker Polarity Test, Generator, Audio Scope, CLF Viewer, and Recorder, and the framework to add more powerful modules as you need them.

Customize AudioTools for your needs by buying any of the additional optional modules, like Smaart Tools I, SPL Graph, or Impulse Response, at any time right from your iOS device.

We test every iOS device and calibrate the microphone level and frequency response for the best results. We have the ability to turn off the Apple low frequency filters, and on many devices we can measure up to 120 dB SPL.

Add iTestMic, iPrecisionMic, or iAudioInterface2 for a complete professional audio and acoustic test and measurement platform.

Actual reviews:

“...AudioTools is a “how did I ever live without it” app”.

“I think this application is the best I EVER purchased.”

“I have used many thousands of dollars of complicated test equipment that doesn’t measure up to this app suite.”

***** Included in the app price *****

* SPL Meter
A faithful reproduction of a classic analog SPL meter. Includes A and C weighting, and Fast and Slow ANSI decay modes. All filters meet or exceed ANSI type 1.

A 1/3 and octave band Real Time Analyzer. Includes touch-GUI range control, a cursor, max/min bars, and noise curve overlays.

Detailed acoustic analysis, up to 32876 points. View full detail or smooth to 1/24, 1/6, 1/3 or octave. Includes cursor, scalable graphics, and peak tracking.

* Polarity
Speaker polarity checker. Route the test signal to a speaker, and read the polarity of the speaker on the screen.

* CLF Viewer
Show loudspeaker data, including plots for impedance, axial response, sensitivity, polar response, and 6dB coverage, and a 3D color balloon plot.

* Delay Finder
Measures the time it takes for a pulse to return from a speaker.

* Generator
Generates sine waves, square waves, white and pink noise.

* Line Level Tests
A line level measurement function and frequency counter.

* Audio Scope
A dual-channel audio oscilloscope that includes auto-triggering, variable gain and sweep rate, and storage of scope images.

* Recorder
A mono/stereo audio recorder with WAV and compressed formats and 8k-48k sample rate. Transfer files via WIFI.

* File transfer of results via wifi to PC / Mac.

* Audio Calculators

***** Optional modules available for purchase from within AudioTools *****

* Smaart® Tools - Single channel module.
The power of Smaart® on a mobile platform. Includes RTA graphs to 1/48th octave and Spectrograph. Split-screen on iPad.

* Transfer Function -- Requires 2-channel interface.
Two-channel FFT-based measurement. Allows you to analyze sound system performance with music or pink noise as the signal source.

Energy Time Curve. Plot decay of an impulse over time, and compute RT60 time. Internal or External trigger.

* Impulse Response
Record and analyze an impulse or sine sweep, compute octave and 1/3 octave ETC, T30, C50, C80, CT, Definition. Also shows FFT and Schroeder curve.

Fast and accurate sine-sweep measurement of loudspeakers and rooms.

* SPL Pro
Digital SPL meter with ANSI Slow, Fast, Peak, and Impulse mode, along with LEQ. Includes A and C weighting, and all 10 octave band filters.

* SPL Graph
Plot second-by-second SPL level for up to 24 hours, and optionally record the audio. Also, add the optional Octave Band Logging upgrade to elevate this tool to rival any professional logging SPL Meter.

* SPL Traffic Light
Monitor live sound levels SPL and Leq and see status in a simple green-yellow-red display.

* STIPA Speech Intelligibility
Meets the current NFPA code standards for testing evac systems and schools.

* Speaker Distortion
Measure THD+n of any driver.

* THD+n (requires iAudioInterface)

* Impedance Meter and Plot (requires iAudioInterface)

* Phase Meter

* Amplitude Sweep

AudioTools App Description & Overview

The applications AudioTools was published in the category Music on 2009-09-08 and was developed by Andrew Smith. The file size is 189.00 MB. The current version is 10.8 and works well on 8.0 and high ios versions.

AudioTools, the #1 audio test & measurement app for iOS.

- Input device name has been added to the header of all stored .txt files
- "Clear accessory in use flag" button on audio settings crashes
- Enabled playback through iPhone speaker by default

- Fixed GUI issues on large iPhone displays on iOS 11

- Fixed instability in EPPO mode with octave smoothing on iPad Pro 10.5
- Fixed losing EPPO mode recall in some cases

- Crashes saving txt file to iCloud

SPL Dashboard
- The spl pro (max db) is at the top overwrite the spl pro title could this be moved back down where it was

SPL Graph
- Fixed issue with recording M4A format audio files on iOS 11
- Fixed dropping last second or missing first second in data files
- Fixed Notifications not working in some cases
- Fixed possibly losing saved gmail address & password
- Fixed keyboard blocking text fields in Notifications setup page
- Fixed logic errors with saving files if incomplete email information is set
- Failed emails now cause alert message with cause
- Fixed emails failing to send
- Fixed possible crash when sending emails with a slow network connection

AudioTools App Tips & Tricks

AudioTools Reviews

Real Jake

EDC for all working sound humans  Real Jake  5 star

Leatherman? check. Flashlights? check. Sharpies? check. Gaff?check. AudioTools? check. Never leave home without it!


Awesome app  Dfghhjjjjhgfffgg  5 star

I’ve used this app for years now and have not rated it but it has always been up in the 4-5 star range. Great updates and quick to fix any bugs. I thought I bought the SPL pro once but it never transferred to my newer devices. I could be wrong it was quite a while ago, but everything else has always transferred with all my new devices. I found that there is an option to restore purchases but I did have to click the SPL pro button first for the choice to restore to come up. Andrew did respond but I had already figured it out. Thanks for your help and quick response.


Live gigs  livesoundmario  5 star

Awesome tool best app ever a must have for any sound engineer.


Good app that is regularly updated.  Soundguytyler  5 star

New features and quality improvements come regularly.


Best App for iOS  macphoto77  5 star

Tried literally every other app and nothing else compares.


Updated OS11 Screwed App Up  $&%#*^  1 star

The dials on my sound generator are wayyy out of line with the new OS11. I’m running an iPhone 7Plus and had absolutely no issues with the app until the “new and improved” OS came about. Why are people always fixing things that AIN’T BROKEN???😡


Used to be great, now seems overpriced  KavehV  2 star

The price of the individual modules seems way too high, especially for what else is available in the App Store. On top of that, the SPL meter still doesn’t display properly in iOS 11.


Awesome responsiveness of support  Babsiphonenewb  5 star

THE acoustics software tool for iOS.


Excellent  D.856535  5 star

Great set of tools for audio! Highly recommend these.

32 Degree Audio

The professional's choice.  32 Degree Audio  5 star

This app along with the iAudio interface offers tens of thousands of dollars worth of testing and measuring ability in one small package. The impedance meter alone is worth the purchase price.


ptviatwit ptviatwit 3 star

The number 1 long-term UNRELIABLE iOS app: #AudioTools by Studio Six Digital. Never ending bug fixes, crashes, issu…


Simon Duggal simonduggal 3 star

My overview vid of OEK Sound's great new Dynamic Resonance Suppressor - Soothe #resonance #audiotools #suppressor



Hear the new Future FM Synth - NI #Maschine Expansion Pack :


Epic  SteveGuy71  5 star

This is bring respect back to phone apps. With a calibrated mic, you have a pretty powerful toolset. Use this in my car to EQ out exaggerated frequencies. If yer a sound quality guy. Get this thing.


Extremely useful  Jf4828  5 star

This is THE app to have if you are in the field of acoustics at all. Using Dayton imm-6, calibration file and an acoustical calibrator with this app, I'm within a dB (across the spectrum 1/3 octave) of my reference desktop measurement system which uses a calibrated Earthworks M30. No, the described setup is not lab grade, but it is good enough for the majority of use cases. Using the ipad camera connection kit, I run the art dual pre to a real measurement mic for results on par with desktop Smaart. Note that this app has an add on for Smaart that is $49.99. It is single channel only but has proven extremely valuable. Audio tools does have its own add on module for dual channel measurements if you have the need. The spl meter modules using the imm-6 is reliable to about 110dB; beyond that it would be better to use a connection kit, USB sound card and decent measurement mic. There are a ton of tools and calculators included. The add ins are expensive but the base set alone is worth the asking price if you are really in the field. Read their website and watch the videos to get an idea of what this app can do.


Incredible!!  Bangarang143  4 star

This app is an absolute must-have for any audio professional. Hands down the best app of its kind. The only reason it didn't get 5 stars is because of its UI. It's very windows 98 esque.. I'd like to see a more apealing interface. But as far as tools and functionality is concerned, five stars!


Great app set for guerrilla acoustic work  Jdcrosby  4 star

A little pricy for some components, but quite useful.


The app is awesome, and the support is amazing!  diggerdandantheman  5 star

Sorry for the delay guys, back in the states now... ABSOLUTELY AWESOME "Sound tech - love it... Use it daily at gigs, theater, etc... Smaart apps are the bomb. Issues fixed, so 5 stars it is. Couldn't ask for a better app for the iPad. :)" So quick to fix issues as well... Brilliant.


Extremely Helpful Tool  johnsondigital  5 star

I don't mix a gig without it sitting on my console anymore. Quick, at-a-glance reference for SPL and RTA. I've ot just scratched the surface of all this app can do. Many, many thank you's to the creators.

El beavis

Audio Tools  El beavis  5 star

If you are a real audio guy this the biggest reason to buy an IPad. This has completed changed the way I work. Superb in all regards.


Update anomaly?  asych  3 star

The app says it requires iOS 4.3+, but iTunes reports there's a problem when syncing. It says this app requires iOS 7. I'm using 6.1.2. I get a red indicator on the app store icon to update, but it says all apps are up to date. What's the problem?


Indispensable  Ktsound  5 star

A must have app for convenience and value for anyone in Pro Audio or the audio hobbyist. Updates are timely and when there is a problem, they are quick to correct. Truly amazing the versatility this product offers on an iOS device. 10 years ago these features required a dedicated PC and $$thousands.


Functionality awesome, appearance cartoonish  admsjas  5 star

As far as function goes its great for audio tools on a phone. I just updated to the new "more professional" look and I have to say its really cartoonish and unprofessional looking. I really don't get this push for icons and buttons that are flat and have no depth. To me it's visually unappealing. I will not be updating my other devices until they go back to a real professional looking interface.

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