# Audio Toolbox — Audio Analysis and Creation.

> Audio analysis and creation suite with tone generator, oscilloscope, and FFT. (iPhone/iPad app by 4Pockets.com.)

- Source: https://appshunter.io/ios/app/audio-toolbox/id1353387223 (this page in markdown: same URL + `.md`)
- Developer: [4Pockets.com](https://appshunter.io/developer/370131860)
- Category: Music, Utilities
- Price: $3.99
- Rating: 5.00/5 from 7 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 13 · 3 MB
- Languages: American English
- Released: 2018-03-24
- Data updated: 2026-08-17
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/audio-toolbox/id1353387223/reviews.md

## What is Audio Toolbox?

Audio Toolbox is a suite of audio analysis tools for the iPhone and iPad. It comprises both audio waveform generators as well as a highly accurate Fast Fourier analysis engine, an audio oscilloscope and various frequency detection and tuning tools.

The Tone Generator allows you to create anything from a simple sine, triangle, square, or sawtooth waveform as well as white and pink noise. It also supports log and linear sweep tones with definable range and level and complex wave construction using sine waves. The later is great for teaching audio theory with its DTMF and complex tone generation tools you can build complex waveforms and then analyse their component parts using FFT and the oscilloscope. Build DTMF, triangle, square or saw waves using multiple sine waves etc.

The Audio Oscilloscope allows you to analyse directly from the tone generator or microphone. The scope features both free running and single shot modes with adjustable triggering options. The single shot mode automatically starts and stops capturing when short bursts of sound exceed a threshold. The oscilloscope also features a simple measuring tool to help measure duration and frequency of a waveform. 

The FFT Analysis section provides both Linear, Logarithmic as well as 1:1, 1:3 and 1:6 Octave modes. There is also an SPL meter complete with LEQ options and A/C weighting, log and linear Spectrograph and Mixer EQ modes for setting up audio mixers.

All screens support 10x zoom, full screen and pause modes to aid analysis. 

There are also specific modes to detect peak frequencies, musical notes with cents offset, perfect for instrument tuning. Definable calibration tuning allows you to tune +/- 40Hz.

Features:
 
•20Hz-22KHz Tone Generator.
•Sine, Square, Saw, Triangle, Sweep and MultiTone options.
•Accurate 8K Fast Fourier Analysis.
•32bit / 44KHz floating point audio sampling.
•Standard ANSI/IEC A and C weighting curves. 
•Up to 64x oversampling. 
•Smoothing (alternative to averaging).
•Automatic noise cancellation. 
•Automatic peak note / frequency and octave display.
•Narrow band Linear and Logarithmic scalable displays. 
•Spectrogram display with Log and Linear Modes. 
•1:1, 1:3 and 1:6 octave display modes. 
•1:1, 1:3 and 1.6 Mixer tuning modes.
•SPL (Sound Pressure Level) display. 
•Max, Min and Peak level capture.
•LEQ Mode (Equivalent Continuous Sound Level).
•Variable definable decibel scales.
•Touch screen display of nearest point with frequency and decibel readout. 
•Audio Oscilloscope - Free Running and One Shot modes.
•0.1 to 1000Hz timebase.
•0.25-50x scope Magnification.
•Definable trigger (leading and trailing edge).
•10x zoom and full screen modes. 
•Pause facility freezes the live trace to aid analysis of data. 
•Camera Roll capture facility.
•Export and Email CSV data from FFT or Scope.
•Built in web server for transferring files.
•Capture peaks over time facility. 
•Works on both iPhone and iPads.

## Key features

- Tone Generator (20Hz-22KHz)
- Multiple Waveform Options
- Fast Fourier Analysis
- Audio Oscilloscope
- Frequency and Note Detection
- SPL Meter with LEQ
- CSV Data Export

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/audio-toolbox/id1353387223/reviews.md

### 5/5 — Finally found what I needed!

*2024-08-09*

Accurate measurements, clean UI, and works in landscape and portrait mode.  I’m very happy with the app!  No issues.  Thanks to the development team.

### 5/5 — Works great for me!

*2021-09-01*

I’ve tried a handful of programs, and so many of them are not very useful. This one is! It agrees with my HP spectrum analyser, and gives me accurate sweeps, white/pink noise so I can use my iPad as a generator for aligning equipment. I’ve spent more for apps that are nowhere near accurate. One says its doing 20khz and only puts out 10k. This will be the one I use.

### 4/5 — Some suggestions

*2021-06-16, version 1.03*

Your app is really good. I’d like to give you some suggestions to improve it: when I export the data in csv format, using time base of 1ms or lower, the data generated in the file is rounded to steps of 0.01ms each, resulting in repeated values for the “time” column. Please, Just allow some more figures to be shown.

### 5/5 — Excellent all round

*2018-10-11, version 1.02*

Easy to use and great feature set. 

One slight hiccup - on startup, the generated tones/noise rapidly pulse instead of being continuous - this appears to resolve when the app is put into background then back (Installed on a 6s)
Update: - Thanks for response; originally found issue on ios11; also present with ios12.

Version 1.02 update: rapid pulsing of generated tones still present on my 6s under ios12.

## Frequently asked questions about Audio Toolbox

### What is Audio Toolbox?

Audio Toolbox is a powerful suite of audio analysis tools for iPhone and iPad. It includes a tone generator, audio oscilloscope, and Fast Fourier analysis engine for detailed sound examination and creation.

### What types of waveforms can Audio Toolbox generate?

Audio Toolbox can generate sine, triangle, square, and sawtooth waveforms, as well as white and pink noise. It also supports sweep tones and complex wave construction using multiple sine waves.

### Can Audio Toolbox be used for instrument tuning?

Yes, Audio Toolbox features specific modes to detect peak frequencies and musical notes with cents offset, making it perfect for instrument tuning. It allows for definable calibration tuning up to +/- 40Hz.

### What analysis modes are available in Audio Toolbox?

The app offers Fast Fourier Analysis in Linear, Logarithmic, and Octave modes (1:1, 1:3, 1:6). It also includes an SPL meter with LEQ options and A/C weighting, Spectrograph, and Mixer EQ modes.

### Does Audio Toolbox support exporting data?

Yes, Audio Toolbox allows you to export and email CSV data from FFT or Scope analyses. It also includes a built-in web server for transferring files between devices.

### What devices is Audio Toolbox compatible with?

Audio Toolbox is designed to work on both iPhone and iPads, offering a versatile experience for mobile audio professionals and enthusiasts.

### How frequently is Audio Toolbox updated?

The latest version of Audio Toolbox is 1.05, which was last updated on September 4, 2025. This indicates ongoing support and potential for future enhancements.

### What is the price of Audio Toolbox?

Audio Toolbox is a paid application, available for $3.99. This one-time purchase grants access to all its advanced audio analysis and creation features.

## Version history (last 5 releases)

### 1.05 — 2025-09-04

Updated for compatability with future versions of iOS.

### 1.04 — 2022-01-24

Fixed an issue which caused a misaligned scale on the FFT displays.

### 1.03 — 2019-05-19

Fixed issue with audio glitching on iPad Pro's running iOS12.
Fixed a font scaling issue in the frequency display on the iPad..

### 1.02 — 2018-10-02

Solved the issue of glitchy audio on iOS12 on first launch.

### 1.01 — 2018-04-04

Minor Bug Fixes.
Added ability to receive push notifications.

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All apps by 4Pockets.com: https://appshunter.io/developer/370131860

## Related topics

[the audio toolbox](https://appshunter.io/ios/topics/the-audio-toolbox)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*