AudioTools, dB, Sound & Audio Downloads & RevenueAudioTools, dB, Sound & Audio · App Store
AudioTools, dB, Sound & Audio is #42 in Music Paid in United States and charting in 15 of 30 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
DeveloperAndrew Smith
CategoryMusic
Price19.99 USD
Released
Rating★ 4.8 (5.1k)
Version18.15
Age rating4+
First seen by us
24 Sep 2026
24 Sep 2026Installs (est.)500k+ worldwide
AudioTools, dB, Sound & Audio update history & changes
Last change · 31 events since 8 Sep 2009Full timeline ↓✏️New iPad screenshots✏️New screenshots📈Entered the top 10 on iPad · Top Paid All Apps⭐Passed 10K ratings⭐Passed 10K ratings📦Updated to version 18.15📈New best rank in the overall chart: #27📦Updated to version 18.14🆕First spotted by AppInsider🆕Released on the App Store
Full timeline · 31 events
- ✏️AudioTools, dB, Sound & Audio: new iPad screenshots· TH
- ✏️AudioTools, dB, Sound & Audio: new screenshots4 screenshots (was 4) · TH
- 📈AudioTools, dB, Sound & Audio entered the top 10 on iPad · Top Paid All AppsAR
- 📦AudioTools, dB, Sound & Audio updated to version 18.15AudioTools, #1 audio test and measurement app
New in this release:
- Ready for iPhone Duo: every screen adapts to closed, open, book and tent, with controls in the side strip.
- Transfer Function: delay finder locks on and repeats to 0.01 ms; phase, coherence and averaging reworked (H1 estimator, coherence as Smaart shows it); reference follows a streamed SurroundPod generator.
- LARSA: a short or quiet trigger re-arms instead of ending the capture; no crash on a calculation with no sweep captured.
- uPrecisionMic (legacy USB): low and high ranges measure correctly in 24-bit; no stray "Calibration Modified" popup.
- HAA Link: speaker distance follows the Hyperion 1.2 firmware convention; QSC Q-SYS Core supported as a processor; Auto calibration runs on any processor.
- Utilities: the Files row, which did nothing, is gone.
- Ready for iPhone Duo; built for the latest iOS.
- Bug fixes and stability improvements.… more - 📈AudioTools, dB, Sound & Audio new best rank in the overall chart: #27Top Paid · All Apps · MY
- 📈AudioTools, dB, Sound & Audio entered the top 10Top Paid · Music · IN
- ✏️AudioTools, dB, Sound & Audio: new iPad screenshots· TW
- ✏️AudioTools, dB, Sound & Audio: new screenshots4 screenshots (was 4) · TW
- ✏️AudioTools, dB, Sound & Audio: new iPad screenshots· 11 countries
- ✏️AudioTools, dB, Sound & Audio: new screenshots4 screenshots (was 4) · 11 countries
- ✏️AudioTools, dB, Sound & Audio: new iPad screenshots· MY
- ✏️AudioTools, dB, Sound & Audio: new screenshots4 screenshots (was 4) · MY
- 📦AudioTools, dB, Sound & Audio updated to version 18.14AudioTools, la app #1 de pruebas y medición de audio
Novedades en esta versión:
- Lista para iPhone Duo: cada pantalla se adapta a los modos cerrado, abierto, libro y carpa, con controles en la tira lateral.
- Adaptable al tamaño de ventana: los diseños siguen la ventana, incluyendo iPhone Mirroring en macOS 27.
- Apariencia de iOS 26 adoptada.
- SPL Dashboard: Detener funciona con el guardado automático desactivado; los medidores se apilan cuando la pantalla es alta.
- SPL Pro: las etiquetas ya no se desplazan tras un pliegue; el menú de ponderación aparece correctamente orientado en una pantalla volteada.
- SPL Meter: diseño horizontal restaurado.
- Scope: el panel del generador ya no aparece dos veces.
- LUFS, Channel Mapper, STIPA, Thiele/Small, Impedance, Recorder: correcciones de diseño para pantallas pequeñas y de formas irregulares.
- Low SPL: títulos de banda cortos en pantallas angostas.
- LARSA: nivel de activación automático cuando la medición se reproduce en Hyperion, SurroundPod o Apple TV; temporización de subgraves desde la envolvente; Magnitud y Fase ya no aparecen en blanco con un micrófono externo y sin archivo de compensación.
- Calibration: iPad (A16) agregado a la tabla de dispositivos.
- HAA Link: corregido el fallo en el panel de filtros; miniDSP 2x4 HD compatible como procesador.
- CinemaTools: Sub Alignment, Signal Generator, respaldos de proyectos y múltiples correcciones.… more - 📈AudioTools, dB, Sound & Audio entered the top 10Top Paid · Music · BR
- 📈AudioTools, dB, Sound & Audio entered the top 10Top Paid · Music · AU
- 📈AudioTools, dB, Sound & Audio entered the top 10Top Paid · Music · ID
- 📈AudioTools, dB, Sound & Audio entered the top 10Top Paid · Music · FR
- 📦AudioTools, dB, Sound & Audio updated to version 18.12AudioTools, #1 audio test and measurement app
New in this release:
-FFT: new Parallel mux mode analyzes every included mic at once and power-averages them
-Mic calibration files now apply the whole correction curve, not just the first part
-FFT: mic compensation follows the frequency axis when the scale changes
-The FFT play/pause button shows the actual run state
-Leaving FFT, Scope, Transfer Function or Amplitude Sweep now stops the analyzer
-Fixed the dead "..." toolbar button on iOS 26 and 27
-Fixed the sidebar toggle hiding the category list
-Fixed ghost menu buttons and the SPL Traffic Light header
-SPL Pro and SPL Meter layout fixes on every iPhone
-Support for new iPhone models
-Calibration for the latest iPhone models
-Faster plotting: Metal only
-Built for the latest iOS
-Bug fixes and stability improvements… more - 📈AudioTools, dB, Sound & Audio new best rank in the overall chart: #43Top Paid · All Apps · TW
- 📈AudioTools, dB, Sound & Audio entered the top 10 in 2 chartsTop Paid · Music · CN · Top Paid · Music · RU
- 🆕AudioTools, dB, Sound & Audio first spotted by AppInsider#53 in Top Paid · Music · Japan
- 📦AudioTools, dB, Sound & Audio version 18.11No release notes
- 🆕AudioTools, dB, Sound & Audio released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.8 ★
5.1k ratings
Measured
Best rank now
#42
Music PaidMeasured
New ratings a week
5.2
▲ +129% vs the 2 weeks before
Measured
AudioTools, dB, Sound & Audio at a glance
AI summary written from our chart and store data, 2026-11-07. It can be wrong: check the numbers above.
A professional-grade audio and acoustic analysis suite for iOS, designed for sound engineers and acousticians to perform measurements like SPL, RTA, and FFT. The app holds strong positions in the Russian (#5) and Indonesian (#13) paid music charts, indicating significant traction in these specific markets compared to its lower ranking in the US (#42).
Similar apps: Spectroid, Audio Analyzer, RT60 Analyzer
AudioTools, dB, Sound & Audio on the App Store
App details
App ID
325307477
Publisher
Andrew Smith
On the store since
Sep 2009
17 years on the store
Minimum OS
iOS 15.0+
iPhone 6s and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
9
EN FR DE JA PL ZH ES SV ZH
Size
101 MB
Also listed in
Utilities
App privacy Measured
AudioTools, dB, Sound & Audio declares it collects no data at all — the rarest and most private label on the App Store.
Declared label
Data Not Collected
As declared by the developer on the App Store — Apple requires every app to publish this label. We track changes over time.
AudioTools, dB, Sound & Audio downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where AudioTools, dB, Sound & Audio's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in AudioTools, dB, Sound & Audio before Apple and Google take their fee.
How this is calculated
Not on any Top Grossing chart: monthly active users × spend per user for its category, measured on the charted apps nearest the bottom of the charts.
Business model: In-app purchase-led
How AudioTools, dB, Sound & Audio makes money: subscriptions, one-off purchases and ads.
SubscriptionsIn-app purchases
Subscriptions
/mo
of revenue
Top in-app purchases · App Store US, most popular first
| 1 | SPL Graph Module subscription | |
| 2 | SPL Pro Module subscription | |
| 3 | Polarity Test Module | |
| 4 | ETC Module | |
| 5 | THD+n Module | |
| 6 | Impedance Module | |
| 7 | Speaker Distortion | |
| 8 | IR Module | |
| 9 | SPL Traffic Light subscription | |
| 10 | SoundScope VR |
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| United States | MusicPaid | #42 |
 Russia | MusicGrossing | #15 |
| United States | All AppsPaid | #169 |
 China | MusicPaid | #45 |
| Russia | MusicPaid | #11 |
 Brazil | MusicPaid | #15 |
 Indonesia | MusicPaid | #14 |
 Germany | MusicPaid | #47 |
 Canada | MusicPaid | #48 |
| Japan | MusicPaid | #167 |
 South Korea | MusicPaid | #77 |
| Brazil | All AppsPaid | #183 |
 India | MusicPaid | #69 |
 France | MusicPaid | #91 |
| Indonesia | All AppsPaid | #140 |
 United Arab Emirates | MusicPaid | #64 |
 Australia | MusicPaid | #188 |
 Thailand | All AppsPaid | #142 |
 Saudi Arabia | MusicPaid | #114 |
Apps near AudioTools, dB, Sound & Audio on the chart
Music Paid, around #42.
Ratings
App Store, worldwide.
Rating
4.8 ★
5.1k ratings
Measured
Ratings
5.1k
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
5.2
▲ +129% vs the 2 weeks before
Written reviews a week
under 1
US App Store
Lifetime rating
4.8★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
80/100
faster than 80% of Music apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about AudioTools, dB, Sound & Audio
From the 54 most recent App Store reviews in the US.
Professionals highly value the app's accuracy and extensive toolset for audio testing and acoustic analysis. However, some users express frustration over perceived hidden costs, subscription requirements, and occasional registration issues.
Mostly positive (93% of recent reviews give 4–5 stars). People like it for its features and content, and being useful. The main complaints are about price and subscriptions, and missing features or content.
What people like
- Features & content: “Great tool for audio work!”
- Useful: “The base module is useful”
- Price & subscription: “Definitely worth the price”
- Ease of use: “Easy to learn, accurate, useful data”
Common complaints
- Price & subscription: “Nearly every feature shown in the app description requires additional money”
- Features & content: “Nearly every feature shown in the app description requires additional money”
About AudioTools, dB, Sound & Audio
AudioTools from Studio Six Digital 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.
* RTA
A 1/3 and octave band Real Time Analyzer. Includes touch-GUI range control, a cursor, max/min bars, and noise curve overlays.
* FFT
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 *****
* SoundScope VR - FFT-based audio analyzer with VR.
The powerful acoustical analysis module. Includes RTA graphs to 1/48th octave and Spectrograph, and can display VR.
* 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.
* ETC
Energy Time Curve. Plot decay of an impulse over time, and compute RT60 time. Internal
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.
* RTA
A 1/3 and octave band Real Time Analyzer. Includes touch-GUI range control, a cursor, max/min bars, and noise curve overlays.
* FFT
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 *****
* SoundScope VR - FFT-based audio analyzer with VR.
The powerful acoustical analysis module. Includes RTA graphs to 1/48th octave and Spectrograph, and can display VR.
* 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.
* ETC
Energy Time Curve. Plot decay of an impulse over time, and compute RT60 time. Internal
Latest updates
18.15
AudioTools, #1 audio test and measurement app
New in this release:
- Ready for iPhone Duo: every screen adapts to closed, open, book and tent, with controls in the side strip.
- Transfer Function: delay finder locks on and repeats to 0.01 ms; phase, coherence and averaging reworked (H1 estimator, coherence as Smaart shows it); reference follows a streamed SurroundPod generator.
- LARSA: a short or quiet trigger re-arms instead of ending the capture; no crash on a calculation with no sweep captured.
- uPrecisionMic (legacy USB): low and high ranges measure correctly in 24-bit; no stray "Calibration Modified" popup.
- HAA Link: speaker distance follows the Hyperion 1.2 firmware convention; QSC Q-SYS Core supported as a processor; Auto calibration runs on any processor.
- Utilities: the Files row, which did nothing, is gone.
- Ready for iPhone Duo; built for the latest iOS.
- Bug fixes and stability improvements.
18.14
AudioTools, la app #1 de pruebas y medición de audio
Novedades en esta versión:
- Lista para iPhone Duo: cada pantalla se adapta a los modos cerrado, abierto, libro y carpa, con controles en la tira lateral.
- Adaptable al tamaño de ventana: los diseños siguen la ventana, incluyendo iPhone Mirroring en macOS 27.
- Apariencia de iOS 26 adoptada.
- SPL Dashboard: Detener funciona con el guardado automático desactivado; los medidores se apilan cuando la pantalla es alta.
- SPL Pro: las etiquetas ya no se desplazan tras un pliegue; el menú de ponderación aparece correctamente orientado en una pantalla volteada.
- SPL Meter: diseño horizontal restaurado.
- Scope: el panel del generador ya no aparece dos veces.
- LUFS, Channel Mapper, STIPA, Thiele/Small, Impedance, Recorder: correcciones de diseño para pantallas pequeñas y de formas irregulares.
- Low SPL: títulos de banda cortos en pantallas angostas.
- LARSA: nivel de activación automático cuando la medición se reproduce en Hyperion, SurroundPod o Apple TV; temporización de subgraves desde la envolvente; Magnitud y Fase ya no aparecen en blanco con un micrófono externo y sin archivo de compensación.
- Calibration: iPad (A16) agregado a la tabla de dispositivos.
- HAA Link: corregido el fallo en el panel de filtros; miniDSP 2x4 HD compatible como procesador.
- CinemaTools: Sub Alignment, Signal Generator, respaldos de proyectos y múltiples correcciones.
18.12
AudioTools, #1 audio test and measurement app
New in this release:
-FFT: new Parallel mux mode analyzes every included mic at once and power-averages them
-Mic calibration files now apply the whole correction curve, not just the first part
-FFT: mic compensation follows the frequency axis when the scale changes
-The FFT play/pause button shows the actual run state
-Leaving FFT, Scope, Transfer Function or Amplitude Sweep now stops the analyzer
-Fixed the dead "..." toolbar button on iOS 26 and 27
-Fixed the sidebar toggle hiding the category list
-Fixed ghost menu buttons and the SPL Traffic Light header
-SPL Pro and SPL Meter layout fixes on every iPhone
-Support for new iPhone models
-Calibration for the latest iPhone models
-Faster plotting: Metal only
-Built for the latest iOS
-Bug fixes and stability improvements
Store changes
What AudioTools, dB, Sound & Audio changed on its store page: name, icon, screenshots, price, size, languages, requirements.
New iPad screenshots
New screenshots
4 screenshots (was 4)
New iPad screenshots 
More from Andrew Smith
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