AudioTools, dB, Sound & Audio

Name: AudioTools, dB, Sound & Audio
Price: 19.99 USD
Rating: 4.8 (5053 reviews)
Author: Andrew Smith

Audio analysis and measurement tool

by Andrew Smith

iPhone · iPad

Active Last checked 31 Jul 2026

App Store ↗

Quick verdict

What it is: A suite of professional-grade audio and acoustic analysis tools, including SPL, RTA, FFT, and more.
Best for: audio engineers
sound technicians
music producers
At a glance: $19.99
In-app purchases
Subscription

Categories and search queries

Official categories

Music
Utilities

AppCorpus categories

Key functions

Function	Availability	Access	Scope	Evidence
Family Sharing	Yes	Unknown	App Store	Store published
In-app purchases	Yes	Limited free	—	Store published
Subscription	Yes	Paid	—	Store published

Screens

No screenshots collected yet.

Pricing & paywalls

App Store

Price: $19.99
All-In Module Access — $19.99
LARSA — $19.99
SoundScope VR — $19.99

Last verified 31 Jul 2026

Ratings & reviews

App Store

4.8 5053 ratings · App Store

5/5Best audio test app, period
Works great, nothing else even comes close for iOS. Worth every penny. The folks complaining about cost have no clue. This is highly extensible professional software at a reasonable cost for basic, audio testing functionality. It’s tight integration with their hardware results in a accurate test instrument. Even when using a device’s built in mic, the app’s frequency and SPL compensation provide useful data. The idea that all of this professional functionality be provided for 20 bucks is nuts.

Schafrath · 31 Jul 2026
5/5Pro Audio Must Have App!!
I work as a pro sound mixer and downloaded Audio Tools thinking it would be a cool toy to show off to collegues, but not much more. As it turns out, Audio Tools is a "how did I ever live without it?" app! I have used The RTA with the internal iphone mic to rough tune LOUD monitor wedges and FOH systems and so far have been very happy with the results. The db meter works great as does the tone generator. This app literally replaces $1000's worth of test equipment for the price of a Radio Shack db meter!! If you tour as an artist or band sound mixer and don't already have a SMART, Apogee, Earthworks rig, this app is for you, especially if you work on A different PA everyday! I can't wait to try the interface.

millermixFOH · 31 Jul 2026
5/5Awesome app
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.

Dfghhjjjjhgfffgg · 31 Jul 2026
5/5Excellent features, accuracy, and support.
So far, I have only made use of the LARSA tool in this suite, but the attention to detail is very high, so I get the impression that everything in this suite of tools is just as good. The author, Andrew Smith, was also very responsive and helpful in email when I asked some usage questions. The LARSA tool is amazing. My goal was to find out if my car stereo had any need for EQ correction because I thought I could hear an unnatural peak at 1.5k. So I was able to pair my iPhone with the car stereo so that the LARSA app played a frequency sweep through the car speakers, while the app simultaneously listened to the resulting sweep with its internal mic, and then graphed it. Sure enough, there was the proof: a hump at 1.5k in the graph, about 8db’s worth. I could then easily make a parametric EQ correction of the exact amount, and now it sounds much better. I was able to do all this immediately without any special configuration, it just worked out of the box. The author has posted about how the app turns off some of the built in filtering and limiting on the iPhone’s internal mic so that it gets an accurate response. For adjusting my car stereo, this was enough for my needs, but it’s great to know that I could also attach a calibrated microphone and get and even more accurate result. The app lets you run multiple tests (up to 8 of them I think) and compare them or average them together. I used this to get multiple samples from different listening positions in the car. It also lets you save and recall multiple test runs, adjust for latency, and other things. Very feature-complete. Final note: the LARSA tool is among the “in-app-purchases”, so you will need to buy it separately, though it has a 7-day trial built in. I think you can also buy it “a la carte”, or with other bundles, in the App Store.

Tfabris · 31 Jul 2026
5/5Almost every tool you will ever need
I have used this app for setting up sound systems (pinpointing feed back quick and easy), tuning speaker cabinets, mastering Cds. You will need more than this but its another tool. Few jobs can be done with just one tool. Yes to make some things easier you will need to purchase some additional tools. Still When a mechanic buys a tool box he generally adds more tools. No doubt your ears are your most important tools that you have, but this suit of apps are definitely a huge help. With this app you get a lot for 20 bucks. The additional modules make a complete tool box. With the ability to see what you hearing.

BanderaT · 31 Jul 2026

Privacy & accessibility

App Store

Privacy

Data Not Linked to You — Analytics — Diagnostics — Other Diagnostic Data Developer declared
Data Not Linked to You — Analytics — Diagnostics — Performance Data Developer declared
Data Not Linked to You — Analytics — Usage Data — Product Interaction Developer declared
Data Not Linked to You — App Functionality — Diagnostics — Crash Data Developer declared
Data Not Linked to You — App Functionality — Diagnostics — Other Diagnostic Data Developer declared
Data Not Linked to You — App Functionality — Diagnostics — Performance Data Developer declared
Data Not Linked to You — Diagnostics Developer declared
Data Not Linked to You — Usage Data Developer declared

Accessibility

No accessibility labels collected yet.

Versions

App Store

17.18
** AudioTools, #1 Test & Measurement Platform New in this version: -Added new subscription option for all-in -Apply custom comp file now works iCloud mode -HAA, fixed UI issues on room setup screen -SoundScope, added option to disable camera to help compatibility with some extern USB audio devices -Recorder now works with files stored on iCloud
17.19
** AudioTools, #1 Test & Measurement Platform New in this version: -Added new subscription option for HAA Home Theater tools -Fixed SPL Pro display on Mac -Bug fixes and stability improvements
17.20
**AudioTools, #1 audio test & measurement platform New in this release: -Added function to send WAV files to Surround Generator -Fixed case where Link to external AudioTools Wireless or Apple TV was being disabled -Improved Speaker Polarity GUI when +/- indicator changes -ETC: Improved dual cursor decay line readout by unlocking cursor from plot Y axis -LARSA: Fixed “Delete All Tests” not removing temp file with tests in it -LARSA: Improved external trigger mode response -LARSA: Fixed a crash after sending the app to the background while LARSA was open -HAA: SPL Pro now always starts in Slow decay mode -HAA: changed the default for all Ambient Noise items to NCB curve -HAA: Drawing Tool for LCR starts with Lock Rows option properly enabled
17.21
*AudioTools, #1 audio test & neasurement platform New in this release: -Fixed recalled FFT plot recall not using mic compensation -Fixed Transfer Function plot name and cursor colors not matching plot colors -Added the mic serial number to the missing calibration pop up -Fixed video capture causing incorrect SPL Graph dB readings
17.22
**AudioTools, #1 audio test & measurement platform New in this update: -Fixed SPL Meter on iPad possibly not showing graphics on second run -Fixed possible missing overall 1/1 and 1/3 octave band data at some resolutions -Fixed internal issue with background email sends -Fixed mic high range not recalling for internal mic after app restart
17.23
**AudioTools, #1 audio test & measurement platform New in this update: -Changed SPL Graph emails to send from [email protected] to comply with server restrictions -Fixed Dual SPL Traffic Light color changes to account for dB offset -Added support for new iOS versions calibration -Fixed mic range not storing and recalling for internal mic after force-quit
17.24
**AudioTools, #1 audio test & measurement platform New in this update: -Fixed dB level meter in Impulse Response -Fixed Files Viewer on Mac computers -Added new octave bandwidth mode option to LARSA filter editor -Corrected upgrade calculator to not include HAA Upgrade -Fixed SPL Graph Lock Graph button not changeable
17.25
**AudioTools, #1 audio test & measurement platform New in this update: -Updated in-app purchase workflow -Bug fixes and stability improvements
17.26
AudioTools, #1 audio test & measurement platform New in this update: - Added Spanish translation - Added Priority Support option - Removed Expert Finder - Improved in-app purchase and subscription workflow - Bug fixes and stability improvements
17.27
AudioTools, #1 audio test & measurement platform New in this update: - Corrected HAA subscription price display - Fixed potential crash in ACU module - Bug fixes and stability improvements
17.28
**AudioTools, #1 audio test & measurement platform New in this update: -Corrected HAA subscription price display -Fixed all-in In-app purchase tier being incorrect during trial period -Fixed potential crash in ACU module -Fixed Ln values to not update while SPL Graph is paused -Improved SPL Dashboard GUI on iOS 26 -Includes initial release of HAA Link -Major HAA update. New Generator button allows connection to Apple TV Surround Generator, Hyperion Processor, or SurroundPod (coming soon). -Channel selection and pink noise signal playing is now controlled from a new panel with loudspeaker icons. -Bug fixes and stability improvements
17.29
*** AudioTools, #1 audio test & measurement platform New in this release: -Fixed font on SPL Meter -Fixed apparent freeze in SPL Pro after going to save files screen -Fixed possible crash in LARSA when in Delay mode, but using normal test signal -Added Cloud sync of in-app purchases so new installs will automatically register them
17.30
** AudioTools, #1 audio test and measurement platform New in this release: * Fixed issues with in-app purchases not being processed correctly * Bug fixes and stability improvements
17.31
**AudioTools, #1 audio test & measurement platform New in this update: -Added Group Delay to Impulse Response -Restored missing Link button for AudioTools Wireless -New option for HAA CinemaTools module with HAA Link -Added support for SurroundPod ATMOS signal generator -Bug fixes and stability improvements
17.32
**AudioTools, #1 Audio test and measurement platform New in this release: --Added HAA CinemaTools module -Fixed IR time axes -Incorporated SurroundPod -HAA, Fixed channel mapping when less than all 9.1.6 channels are enabled -HAA CinemaTools, Added screenshots for room layout, Transfer Function, LARSA, and Impulse Response -HAA CinemaTools, Improved report pagination -Fixed channel naming mismatches in HAA modules -Bug fixes and improvements
17.33
**AudioTools, #1 audio test & measurement platform New in this update: -Added 1k-8k filter option to ETC -Fixes to Impulse Response plots -Fixes to iPrecisionMic gain ranges -Multiple HAA CinemaTools improvements -Bug fixes
18.0
**AudioTools, #1 audio test & measurement platform Major New Update! -Added new Low SPL module to get lower SPL readings with 2 microphones -Added new LUFS Meter on Electrical menu with mono/stereo, calibration, UI, and file import analysis -Added K-weighting optopm to SPL Pro -Updated Gated Noise RT60 for 1/3 octave option and added 8k bands -Added warning in SPL Graph when starting a new test if an unsaved test is in memory -Fixes in HAA tools including in-app purchase status
18.1
**AudioTools, #1 audio test & measurement platform New in this update: -New module, Reference Audio File Player -Auto-EQ added to LARSA -Auto-EQ added to FFT module -PDF reports added for RTA, FFT, ETC, SoundScope, Impulse Response, Transfer Function, Gated Noise RT60, and Transmission Loss -Added fie picker for STIPA Pro occupational noise WAV files -Fixed X-curve display issues in SoundScope -Fixed Impulse Response axes on some plots -Upgrades to HAA CinemaTools project management -Updates to CinemaTools reporting and modules -Bug fixes and stability improvements
18.2
**AudioTools, #1 audio test & measurement platform New in this update: -Now includes various room target curves for reference and filter generation -Fixed compressed section headers on Mac -Improved subscription and in-app purchase handling -Bug fixes and stability improvements
18.3
**AudioTools, #1 audio test & measurement platform New in this release: -HAA CinemaTools Updates -Low SPL in-app purchase fix -Bug fixes and stability improvements
18.4
**AudioTools, #1 audio test and measurement app New in this release: -Updated Chinese localizations -Added Multi-channel Early Reflections function -Improved calibration file detection -Updates to CinemaTools
18.5
**AudioTools, #1 audio test and measurement app New in this release: -Improved translations for many languages -Added Early Reflections module to RP32 checklist -Accessory Found messages now auto-disappear -Bug fixes and stability improvements
18.6
**AudioTools, #1 audio test and measurement app New in this release: *New Module Added*: Thiele Small Loudspeaker Parameters, interfaces with *New Module Added*: Max Clean Subwoofer SPL -Added 24-bit WAV file mode to Recorder app -Added data for all completed tests to CSV file for LARSA, in addition to the summary -Bug fixes and stability improvements
18.7
**AudioTools, #1 audio test and measurement app New in this release: -Added automatic unlock of in-app purchases on new devices -Added date discrimination for calibration file downloads -Bug fixes and stability improvements
18.8 · 15 Jul 2026
**AudioTools, #1 audio test and measurement app New in this release: -Fixed iAudioInterface2 Mono/Balanced setting not persisting -Fixed FFT plot disappearing after changing channels -Improved grphics processing with new Metal engine -Fixed missing measurement tables in PDF reports -Fixed speaker tones stacking during Polarity and SPL tests -Improved FFT test tones for subwoofer measurements -Fixed saved subwoofer FFT plots drawing at the wrong level -Expanded FFT crossover point choices (80 Hz to 2 kHz) -Initial and Final tests now both appear on RSP System FFT plots -Multi-Channel RT/FR results now support Initial and Final measurements -Report groups all Multi-Channel results together, with change-vs-Initial columns -Fixed Impedance Sweep frequency scale after device rotation -Fixed truncated dB values in SPL Pro -Added HAA CinemaTools waterfall plot to multi-channel functions -Added true SPL level to Multi-channel FR plot -Improved FFT Normalization -Bug fixes and stability improvements

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Alternatives

RTA Audio — Same category + similar ratings

Availability by market

Data quality & evidence

Page completeness: Independent summary published
Last verified: 31 Jul 2026
Sources: App Store

Screenshots: not yet collected

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GET /api/v3/apps/325307477

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          "rating": 5,
          "title": "Best audio test app, period",
          "body": "Works great, nothing else even comes close for iOS. Worth every penny. The folks complaining about cost have no clue. This is highly extensible professional software at a reasonable cost for basic, audio testing functionality. It’s tight integration with their hardware results in a accurate test instrument. Even when using a device’s built in mic, the app’s frequency and SPL compensation provide useful data. The idea that all of this professional functionality be provided for 20 bucks is nuts.",
          "author": "Schafrath",
          "date": "31 Jul 2026"
        },
        {
          "rating": 5,
          "title": "Pro Audio Must Have App!!",
          "body": "I work as a pro sound mixer and downloaded Audio Tools thinking it would be a cool toy to show off to collegues, but not much more. As it turns out, Audio Tools is a \"how did I ever live without it?\" app! I have used The RTA with the internal iphone mic to rough tune LOUD monitor wedges and FOH systems and so far have been very happy with the results. The db meter works great as does the tone generator. This app literally replaces $1000's worth of test equipment for the price of a Radio Shack db meter!! If you tour as an artist or band sound mixer and don't already have a SMART, Apogee, Earthworks rig, this app is for you, especially if you work on A different PA everyday! I can't wait to try the interface.",
          "author": "millermixFOH",
          "date": "31 Jul 2026"
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        {
          "rating": 5,
          "title": "Awesome app",
          "body": "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.",
          "author": "Dfghhjjjjhgfffgg",
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          "rating": 5,
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          "body": "So far, I have only made use of the LARSA tool in this suite, but the attention to detail is very high, so I get the impression that everything in this suite of tools is just as good. The author, Andrew Smith, was also very responsive and helpful in email when I asked some usage questions. The LARSA tool is amazing. My goal was to find out if my car stereo had any need for EQ correction because I thought I could hear an unnatural peak at 1.5k. So I was able to pair my iPhone with the car stereo so that the LARSA app played a frequency sweep through the car speakers, while the app simultaneously listened to the resulting sweep with its internal mic, and then graphed it. Sure enough, there was the proof: a hump at 1.5k in the graph, about 8db’s worth. I could then easily make a parametric EQ correction of the exact amount, and now it sounds much better. I was able to do all this immediately without any special configuration, it just worked out of the box. The author has posted about how the app turns off some of the built in filtering and limiting on the iPhone’s internal mic so that it gets an accurate response. For adjusting my car stereo, this was enough for my needs, but it’s great to know that I could also attach a calibrated microphone and get and even more accurate result. The app lets you run multiple tests (up to 8 of them I think) and compare them or average them together. I used this to get multiple samples from different listening positions in the car. It also lets you save and recall multiple test runs, adjust for latency, and other things. Very feature-complete. Final note: the LARSA tool is among the “in-app-purchases”, so you will need to buy it separately, though it has a 7-day trial built in. I think you can also buy it “a la carte”, or with other bundles, in the App Store.",
          "author": "Tfabris",
          "date": "31 Jul 2026"
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      "notes": "** AudioTools, #1 Test & Measurement Platform New in this version: -Added new subscription option for all-in -Apply custom comp file now works iCloud mode -HAA, fixed UI issues on room setup screen -SoundScope, added option to disable camera to help compatibility with some extern USB audio devices -Recorder now works with files stored on iCloud"
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      "version": "17.19",
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      "notes": "** AudioTools, #1 Test & Measurement Platform New in this version: -Added new subscription option for HAA Home Theater tools -Fixed SPL Pro display on Mac -Bug fixes and stability improvements"
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      "released_at": null,
      "notes": "**AudioTools, #1 audio test & measurement platform New in this release: -Added function to send WAV files to Surround Generator -Fixed case where Link to external AudioTools Wireless or Apple TV was being disabled -Improved Speaker Polarity GUI when +/- indicator changes -ETC: Improved dual cursor decay line readout by unlocking cursor from plot Y axis -LARSA: Fixed “Delete All Tests” not removing temp file with tests in it -LARSA: Improved external trigger mode response -LARSA: Fixed a crash after sending the app to the background while LARSA was open -HAA: SPL Pro now always starts in Slow decay mode -HAA: changed the default for all Ambient Noise items to NCB curve -HAA: Drawing Tool for LCR starts with Lock Rows option properly enabled"
    },
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      "store": "apple",
      "version": "17.21",
      "released_at": null,
      "notes": "*AudioTools, #1 audio test & neasurement platform New in this release: -Fixed recalled FFT plot recall not using mic compensation -Fixed Transfer Function plot name and cursor colors not matching plot colors -Added the mic serial number to the missing calibration pop up -Fixed video capture causing incorrect SPL Graph dB readings"
    },
    {
      "store": "apple",
      "version": "17.22",
      "released_at": null,
      "notes": "**AudioTools, #1 audio test & measurement platform New in this update: -Fixed SPL Meter on iPad possibly not showing graphics on second run -Fixed possible missing overall 1/1 and 1/3 octave band data at some resolutions -Fixed internal issue with background email sends -Fixed mic high range not recalling for internal mic after app restart"
    },
    {
      "store": "apple",
      "version": "17.23",
      "released_at": null,
      "notes": "**AudioTools, #1 audio test & measurement platform New in this update: -Changed SPL Graph emails to send from [email protected] to comply with server restrictions -Fixed Dual SPL Traffic Light color changes to account for dB offset -Added support for new iOS versions calibration -Fixed mic range not storing and recalling for internal mic after force-quit"
    },
    {
      "store": "apple",
      "version": "17.24",
      "released_at": null,
      "notes": "**AudioTools, #1 audio test & measurement platform New in this update: -Fixed dB level meter in Impulse Response -Fixed Files Viewer on Mac computers -Added new octave bandwidth mode option to LARSA filter editor -Corrected upgrade calculator to not include HAA Upgrade -Fixed SPL Graph Lock Graph button not changeable"
    },
    {
      "store": "apple",
      "version": "17.25",
      "released_at": null,
      "notes": "**AudioTools, #1 audio test & measurement platform New in this update: -Updated in-app purchase workflow -Bug fixes and stability improvements"
    },
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      "store": "apple",
      "version": "17.26",
      "released_at": null,
      "notes": "AudioTools, #1 audio test & measurement platform New in this update: - Added Spanish translation - Added Priority Support option - Removed Expert Finder - Improved in-app purchase and subscription workflow - Bug fixes and stability improvements"
    },
    {
      "store": "apple",
      "version": "17.27",
      "released_at": null,
      "notes": "AudioTools, #1 audio test & measurement platform New in this update: - Corrected HAA subscription price display - Fixed potential crash in ACU module - Bug fixes and stability improvements"
    },
    {
      "store": "apple",
      "version": "17.28",
      "released_at": null,
      "notes": "**AudioTools, #1 audio test & measurement platform New in this update: -Corrected HAA subscription price display -Fixed all-in In-app purchase tier being incorrect during trial period -Fixed potential crash in ACU module -Fixed Ln values to not update while SPL Graph is paused -Improved SPL Dashboard GUI on iOS 26 -Includes initial release of HAA Link -Major HAA update. New Generator button allows connection to Apple TV Surround Generator, Hyperion Processor, or SurroundPod (coming soon). -Channel selection and pink noise signal playing is now controlled from a new panel with loudspeaker icons. -Bug fixes and stability improvements"
    },
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      "released_at": null,
      "notes": "*** AudioTools, #1 audio test & measurement platform New in this release: -Fixed font on SPL Meter -Fixed apparent freeze in SPL Pro after going to save files screen -Fixed possible crash in LARSA when in Delay mode, but using normal test signal -Added Cloud sync of in-app purchases so new installs will automatically register them"
    },
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    },
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    },
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      "notes": "**AudioTools, #1 audio test & measurement platform New in this update: -Now includes various room target curves for reference and filter generation -Fixed compressed section headers on Mac -Improved subscription and in-app purchase handling -Bug fixes and stability improvements"
    },
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      "notes": "**AudioTools, #1 audio test & measurement platform New in this release: -HAA CinemaTools Updates -Low SPL in-app purchase fix -Bug fixes and stability improvements"
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