AudioTool is made and published by jjbunn. AppBrain is an independent app data site and isn't affiliated with jjbunn. The app name, icon, screenshots and description belong to jjbunn and are shown as published on Google Play.
AppBrain's verdict
EstablishedLoved by users- Total installs
- 64 thousand
- Best rank
- #17
- Top Paid, Norway
- Rating on Google Play
- 4.52
- 1,629 ratings
- Last updated
- September 29, 2026
AudioTool has 64 thousand installs. Users love it: 4.5 stars from 1,629 ratings. Its best ranking is #17 in Top Paid, Music & Audio in Norway.
Summary
AudioTool delivers a professional-grade SPL, dB, and Sone meter paired with a comprehensive audio spectrum analyzer. With real-time measurements, octave-based RTA modes, and calibration features, it’s designed for audio engineers and acoustics work on Android devices. Total downloads exceed 50,000+, with 550 new in the last 30 days.
Pros & Cons
- Comprehensive, professional-grade measurement suite including SPL, Leq, Sone, RT60, and spectrogram
- Advanced real-time analysis with multiple octave RTAs and calibration options
- Built-in signal generator with diverse waveforms for testing and calibration
- Store and load spectra and calibration files for repeatable measurements
- Performance depends on Android hardware and is not guaranteed to meet external audio measurement standards
- Requires several permissions for recording and storage
Installs
Tracked by AppBrain- Last 30 days
- 550
- Per day
- 18
- 30-day average
- Play install range
- 50+ thousand
- Launched
- October 2010
Installs over time
AudioTool has been installed 64 thousand times. Over the past 30 days, it averaged 18 installs per day.
Rankings
Google Play top charts- Highest rank
- #17
- Chart
- Top Paid
- Music & Audio
- Country
- Norway
Google Play Rankings for AudioTool
Top rankings
| Rank | Country | Category | List |
|---|---|---|---|
| 17 | Norway | Music & Audio | Top Paid |
| 18 | Czech Republic | Music & Audio | Top Paid |
| 18 | Netherlands | Music & Audio | Top Paid |
| 19 | Austria | Music & Audio | Top Paid |
| 19 | Belgium | Music & Audio | Top Paid |
| 19 | Switzerland | Music & Audio | Top Paid |
| 19 | Denmark | Music & Audio | Top Paid |
| 19 | Finland | Music & Audio | Top Paid |
| 19 | Indonesia | Music & Audio | Top Paid |
| 19 | India | Music & Audio | Top Paid |
Ranking history in Norway
Competitors
Similar apps and more from jjbunnAlternatives to AudioTool
More from jjbunn
Releases
Updates seen on Google Play- Version
- 8.8.1
- Launched
- October 2010
User feedback
Ratings and reviews on Google PlayGoogle Play Rating history and histogram
Comments on AudioTool for Android
★★★★★
Kevin Wilks
· Feb 25, 2024
This tool is a lifesaver. Works perfectly on the SONY XPERIA Z. ****update 2024*** holy macaroon, been using this tool for over a decade now, and I cannot express in limited words how invaluable it has been to my progression, efficiency and effectiveness throughout the years. I'm on the S24 Ultra now, and it performs flawlessly for PA diagnostics (generator), RTA and general level monitoring.
★★★★★
Tim Rolufs Sr.
· Mar 18, 2024
Excellent app, even better with the Dayton audio imm-6 external microphone. Well worth the price. I used it at a local outdoor concert to measure the frequency ranges of the instruments being played and the spl of the concert was 105 near the speakers and a constant 100 at my seat. I look forward to using it in my basement, car and my son's truck.
★☆☆☆☆
M W
· Jun 27, 2023
I have a Dayton Mic. A Motorola Stylus phone. I have no Audio Tool folder on my phone. I can only move my Calibration File to internal storage on my phone, I have no way of getting the Audio Tool Folder into my internal storage. I've saved files on the Audio Tool app but this does not help me find a way to move my calibration into Audio Tool. After Using 1/3 Octave Calibration I am unable to Load Cal. If I can't load my Cal File I'd like my money back please.
★☆☆☆☆
Geocentric
· Apr 1, 2025
It's not accurate at all from 30 HZ to 70 HZ or so. Reads extremely low from 30 to 60hz range compared to spectroid with same mic and position. My 30hz isn't almost 30 decibels less than peak bass. For speakers and earphones it is saying it has basically zero low end. High resolution set on "flat" and it's way off until around 70hz. Not my mic or me at all. Spectroid is more accurate and it's free. What is going on with high-end reading? Can't tune bass with this at all. Used calibration file too
Technology
Found in the app by AppBrain- Ads
- No ads
- Price
- $7.99
- Libraries
- 29
- App size
- 3.43 MB
- Needs Android
- 5.0+
- Content rating
- Everyone
Technologies used by AudioTool
5 permissions
·
29 libraries
Subscribe to see full permission and library details
Trust & Safety: Permissions requested: MODIFY_AUDIO_SETTINGS, READ_EXTERNAL_STORAGE, RECORD_AUDIO, WRITE_EXTERNAL_STORAGE, and com.julian.apps.AudioTool.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION. These are standard for audio measurement apps, enabling on-device processing and file storage. No explicit data collection beyond local device usage is indicated.
About the app and developer
About AudioTool
AudioTool is a music & audio app developed by jjbunn.
Install Statistics
AudioTool has been installed 64 thousand times. In the last 30 days, the app was installed 550 times. It is ranked in the top 100 music & audio apps.
User Ratings
AudioTool is rated 4.52 out of 5 stars. The rating is based on 1.6 thousand ratings.
App Information
AudioTool costs $7.99. The app size is 3.43 MB. The latest version available is 8.8.1. The last update was on September 29, 2026.
Technical Requirements
AudioTool requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since October 2010.
App Performance Report
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Store listing
By jjbunn, from Google Play“AudioTool: Fully Featured SPL, dB and Sone Meter, plus Audio Spectrum Analyzer”
Screenshots by jjbunn, from the Google Play listing
Description by jjbunn Written by the developer, not by AppBrain. Click to read.
SPL (deciBel) Meter featuring RT60, Leq, Sone, Spectrum Analyzer, Spectrogram, Chart Recorder, Signal Generator, Polarity Checker, and Mic calibration.
Recommended by "Sound and Vision" magazine. Loved by Audio Engineers worldwide: check out the Reviews!
Features: 1/1, 1/3, 1/6 & 1/12 octave RTA modes, Leq (wideband, Octave, variable duration), Sones (Loudness), RT60 (wideband, Octave), Peak Store, Spectrogram, Waterfall, Peak frequency, Impulse, Fast, Medium & Slow filters, Flat & A/C Weighting and film industry X Curve, Averaging, SPL Chart Recorder, Noise Criteria (NC and NR), White/Pink Noise, Sine, Square, Triangle, Sweep, Log Sweep, Warble, Ramp and Impulse signals & loudspeaker polarity checker, L/R select. RTA Store & Load, Hann windows, pinch to zoom, scroll to center.
Examples of recent updates (April 2019):
v8.0 New Feature: Load one or two stored spectrum files and display both alongside the realtime data.
v8.1 New Generator option: swap phase of Right stereo signal
v8.2 New Menu option "Set Resolution" allowing to set 4096, 8192, or 16384 sample lengths
v8.3 New 1/12 Octave RTA mode
Exclusive ISO 1/3 Octave Calibration - can correct for your phone's microphone response. Octave calibration discs are moved up or down to obtain a flat response, and match the overall SPL to that of an external meter. Save/Restore of Cal files (popular Dayton Audio iMM-6, MicW i436, also supported).
Use: gig measurements, home theater, acoustics, car, etc.
AudioTool FFTs sets of microphone samples. Aliasing reduced by Hann windowing. SPL calculated in realtime. Spectra may be saved, then loaded and displayed with the live spectrum. The "Store" button stores the current live spectrum - "Load" shows a list of stored spectra to select.
To hide the buttons, tap the screen. To restore them, tap again. To zoom the scale, pinch the screen. To move the scale, drag it up or down (left or right).
A pair of cursors can be shown: each can be moved to any position, and will display the SPL & time/frequency values there. The cursors can be turned on and off in the Menu.
The loudspeaker polarity checker can be used to check whether a loudspeaker is wired in phase: connect the AudioTool output to the speaker under test, select "Polarity" from the signal generator screen, then return to the RTA screen. If the speaker is out of phase (polarity reversed) AudioTool will show "Pol ---", otherwise "Pol +++" if the speaker is in phase.
The Noise Criteria function shows a set of NC contours overlaid on the 1/1 Octave RTA display and the calculated real time current NC value is also shown.
The Chart Recorder shows a moving trace of the SPL measurements over the last few minutes.
RT60 measurements (how much reverberation or echo there is in a room or hall) can be made using the "RT60" function, triggered using a loud clap (or similar) to or with Pink Noise from the AudioTool generator.
The Signal Generator generates White and Pink Noise, Sine, Square, Triangle and Ramp waves, Sine Linear and Log Sweeps, Warbles and Impulses. The generator uses multiple cycled buffers, refreshed randomly so ensuring truly random White and Pink noise.
The frequency accuracy of the Signal Generator is typically around 1%. Sine wave fidelity is good throughout most of the audio range. Other signals' leading and trailing edges will show ringing and decreasing frequency response artifacts in the upper ranges, depending on the cellphone being used.
The above description is a very terse version of the Online Manual, which may be accessed here:
https://sites.google.com/site/bofinit/audiotool
The friendly AudioTool Discussion Group can be used to request features, find/request Calibration files, or report problems. Feedback is always welcome:
http://groups.google.com/group/audiotool-discussion-group
Disclaimer: AudioTool's performance depends on your Android hardware, and is not guaranteed to meet any audio measurement or safety standards.
Recent changes:
v8.8.1 Adjust position of NC/NR values for visibility
Fix interval clicks in Warble signal generator
Recommended by "Sound and Vision" magazine. Loved by Audio Engineers worldwide: check out the Reviews!
Features: 1/1, 1/3, 1/6 & 1/12 octave RTA modes, Leq (wideband, Octave, variable duration), Sones (Loudness), RT60 (wideband, Octave), Peak Store, Spectrogram, Waterfall, Peak frequency, Impulse, Fast, Medium & Slow filters, Flat & A/C Weighting and film industry X Curve, Averaging, SPL Chart Recorder, Noise Criteria (NC and NR), White/Pink Noise, Sine, Square, Triangle, Sweep, Log Sweep, Warble, Ramp and Impulse signals & loudspeaker polarity checker, L/R select. RTA Store & Load, Hann windows, pinch to zoom, scroll to center.
Examples of recent updates (April 2019):
v8.0 New Feature: Load one or two stored spectrum files and display both alongside the realtime data.
v8.1 New Generator option: swap phase of Right stereo signal
v8.2 New Menu option "Set Resolution" allowing to set 4096, 8192, or 16384 sample lengths
v8.3 New 1/12 Octave RTA mode
Exclusive ISO 1/3 Octave Calibration - can correct for your phone's microphone response. Octave calibration discs are moved up or down to obtain a flat response, and match the overall SPL to that of an external meter. Save/Restore of Cal files (popular Dayton Audio iMM-6, MicW i436, also supported).
Use: gig measurements, home theater, acoustics, car, etc.
AudioTool FFTs sets of microphone samples. Aliasing reduced by Hann windowing. SPL calculated in realtime. Spectra may be saved, then loaded and displayed with the live spectrum. The "Store" button stores the current live spectrum - "Load" shows a list of stored spectra to select.
To hide the buttons, tap the screen. To restore them, tap again. To zoom the scale, pinch the screen. To move the scale, drag it up or down (left or right).
A pair of cursors can be shown: each can be moved to any position, and will display the SPL & time/frequency values there. The cursors can be turned on and off in the Menu.
The loudspeaker polarity checker can be used to check whether a loudspeaker is wired in phase: connect the AudioTool output to the speaker under test, select "Polarity" from the signal generator screen, then return to the RTA screen. If the speaker is out of phase (polarity reversed) AudioTool will show "Pol ---", otherwise "Pol +++" if the speaker is in phase.
The Noise Criteria function shows a set of NC contours overlaid on the 1/1 Octave RTA display and the calculated real time current NC value is also shown.
The Chart Recorder shows a moving trace of the SPL measurements over the last few minutes.
RT60 measurements (how much reverberation or echo there is in a room or hall) can be made using the "RT60" function, triggered using a loud clap (or similar) to or with Pink Noise from the AudioTool generator.
The Signal Generator generates White and Pink Noise, Sine, Square, Triangle and Ramp waves, Sine Linear and Log Sweeps, Warbles and Impulses. The generator uses multiple cycled buffers, refreshed randomly so ensuring truly random White and Pink noise.
The frequency accuracy of the Signal Generator is typically around 1%. Sine wave fidelity is good throughout most of the audio range. Other signals' leading and trailing edges will show ringing and decreasing frequency response artifacts in the upper ranges, depending on the cellphone being used.
The above description is a very terse version of the Online Manual, which may be accessed here:
https://sites.google.com/site/bofinit/audiotool
The friendly AudioTool Discussion Group can be used to request features, find/request Calibration files, or report problems. Feedback is always welcome:
http://groups.google.com/group/audiotool-discussion-group
Disclaimer: AudioTool's performance depends on your Android hardware, and is not guaranteed to meet any audio measurement or safety standards.
Recent changes:
v8.8.1 Adjust position of NC/NR values for visibility
Fix interval clicks in Warble signal generator