# Oscilloscope & Spectrogram — Analyzer Audio Unit

> Real-time audio analyzer with oscilloscope, spectrogram, and frequency identification. (iPhone/iPad app by Blue Mangoo Consulting Company Limited.)

- Source: https://appshunter.io/ios/app/oscilloscope-and-spectrogram/id1525484137 (this page in markdown: same URL + `.md`)
- Developer: [Blue Mangoo Consulting Company Limited](https://appshunter.io/developer/1475107602)
- Category: Music
- Price: $5.99
- Rating: 4.60/5 from 28 App Store ratings · 10 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 3 MB
- Languages: American English
- Released: 2020-08-13
- Data updated: 2026-08-23
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/oscilloscope-and-spectrogram/id1525484137/reviews.md

## What is Oscilloscope & Spectrogram?

OSCILLOSCOPE & SPECTROGRAM is a powerful audio analyzer app and audio unit plugin

KEY FEATURES
- Run as both Audio Unit and standalone app
- View up to three seconds of audio on the screen
- Pause and scroll horizontally to browse back in time
- Pinch to zoom in / zoom out
- See both oscilloscope and spectrogram separately or overlayed together
- Frequency trigger mode helps identify the precise frequency and MIDI note of sounds in the spectrogram
- Stereo and mono views
- Level based trigger mode has lookahead, pause, and zoom
- XY mode shows stereo correlation
- Automatically adjusts FFT size to fit zoom setting
- Bark-frequency scale spectrogram shows nice detail at low and high frequencies
- When zoomed in, the oscilloscope uses sinc upsampling to show you a close approximation of what actually outputs from your audio interface after digital to analog conversion, rather than just displaying raw audio samples.


WHAT DOES THIS APP DO THAT OTHERS DO NOT?

1. Pause Button

We can't emphasize enough how useful this is. You never have to worry about trying to catch short events that disappear quickly because you can watch the sounds go by slowly at a 3 second viewer scale, then just pause and scroll back if you missed something. When you get to the event you want to see you can pinch to zoom in right down to sub-sample level of detail, then zoom back out when you are done and zoom in on something else. This feature alone makes almost all other oscilloscope apps unnecessary because it means you can easily see ANYTHING that you need to see.

2. Frequency Identification Mode

In frequency mode, when you touch the frequency scale on the right of the screen a blue line appears on the spectrogram. When you position the line above a specific frequency on the spectrogram, a panel on the left side of the screen displays the octave, note name, and MIDI number. You can then use the frequency timing oscilloscope to lock in on the exact pitch in cents so that you not only know which MIDI note that sound corresponds to but you know exactly how many cents sharp or flat. The ability to simultaneously see the frequency on the spectrogram and confirm it with precision on the oscilloscope allows you to quickly and easily identify musical pitches to a level of accuracy that have not seen anywhere else, not even in desktop software.

3. Trigger with Lookahead

Almost every oscilloscope has a feature where it re-draws the screen each time the input signal level crosses a specified threshold. This is the main and most basic function of any oscilloscope. However, when setting the trigger at a high level to view the attack section of musical notes or drums, we miss the first part of the note. By using lookahead, this app allows you to see a few milliseconds BEFORE the trigger point so that you can see the whole sound you want to examine.

4. Carefully Designed Spectrogram 

In all spectrum analyzer displays, the upper end of the frequency scale is crowded, meaning that a single pixel corresponds to 10 or 20 frequencies in the frequency analysis. In many other analyzer apps one of two things occur: either 9 out of 10 frequencies in that upper range simply get ignored and disappear from the spectrogram display, or all 10 frequencies combine together to make the pixels in the upper range appear brighter than low frequency sounds of similar volume. This may seem like a technicality until you run a sine sweep or a 20 KHz tone through the analyzer and find that large sections of the input simply aren't displayed on the analyzer screen. Looking at these kinds of test signals on a spectrogram is the primary way that we test and evaluate the quality of audio effect plugins. If a spectrogram is to be of any real use as an analysis tool, it should do this right. Other spectrograms often mess up the lower frequencies too, either by making them take up too much space or by making them very pixelated. This spectrogram carefully avoids these problems.

## Key features

- Real-time oscilloscope and spectrogram
- Pause and scroll audio history
- Pinch-to-zoom functionality
- Frequency and MIDI note identification
- Stereo and mono views
- Trigger with lookahead

## Recent user reviews (10 of 10)

All indexed reviews: https://appshunter.io/ios/app/oscilloscope-and-spectrogram/id1525484137/reviews.md

### 5/5 — My favorite iOS/iPadOS Oscilloscope

*2026-04-26*

Excellent

### 5/5 — This is quite nice!

*2025-02-20*

This is awesome for my music production and such…only thing is the oscilloscope view isn’t programmed correctly…but none the less, its perfect!

### 1/5 — Can’t get out of full screen mode

*2024-10-24*

Really frustrating. The modes are off screen and you can’t get back into the controls. Also the is no settings or controls or guides so it’s very very clunky.

### 5/5 — Powerful

*2023-11-29*

Tha look ahead is awesome

### 1/5 — Problems with iPhone 14 Max Pro cutout.

*2023-05-07*

The iPhone "cutout" prevents using several of the buttons.

### 1/5 — Big difference between what’s advertised and what’s downloaded

*2022-10-10*

The pictures in the ad, and the help video in the app, both show options that aren’t available in the app. I’ve tried it on my iPhone and my iPad, And there is no way to set up a stereo signal, there’s no keyboard pop up, what’s with this bait and switch?

### 5/5 — More colors please

*2020-10-20*

More colors would be great. Thank you

### 4/5 — Useful and beautiful

*2020-08-21*

Not only is this app rather useful for music makers, it is also by far the most beautiful depiction of wave forms available on IOS. My one tiny complaint is that full screen mode is not really full screen, as both sides of the app are still partly visible. Change this to true full screen, and it’s an easy 5 stars.

Nic

### 5/5 — Hervorragend!

*2020-08-18*

Genau was ich gesucht habe. Tut was es soll und das hervorragend!

### 4/5 — I like the product

*2020-08-18, version 1.0.1*

The blue can get a bit dull to look at. Please implement different skins or color pallets.

## Frequently asked questions about Oscilloscope & Spectrogram

### What is the main purpose of Oscilloscope & Spectrogram?

Oscilloscope & Spectrogram is a powerful audio analysis tool that provides real-time oscilloscope and spectrogram views of audio signals. It helps users identify precise frequencies, MIDI notes, and analyze sound events with advanced features like pause, scroll, and zoom.

### How does the pause and scroll feature in Oscilloscope & Spectrogram work?

The pause button allows you to freeze the audio display, letting you examine short or transient sounds at your leisure. You can then scroll horizontally to go back in time and review the captured audio, ensuring you don't miss any critical details.

### Can Oscilloscope & Spectrogram identify specific musical notes?

Yes, the frequency identification mode in Oscilloscope & Spectrogram allows you to touch the spectrogram and see the corresponding octave, note name, and MIDI number. It can even provide accuracy in cents to pinpoint the exact pitch.

### What makes the spectrogram in Oscilloscope & Spectrogram unique?

This app features a carefully designed spectrogram with a Bark-frequency scale, which provides enhanced detail at both low and high frequencies. It also automatically adjusts the FFT size to fit the zoom setting for optimal viewing.

### Does Oscilloscope & Spectrogram support stereo and mono audio?

Yes, Oscilloscope & Spectrogram offers both stereo and mono views, allowing you to analyze your audio signals in the format that best suits your needs. It also includes an XY mode for viewing stereo correlation.

### What devices is Oscilloscope & Spectrogram compatible with?

Oscilloscope & Spectrogram is available for iPhone, iPad, and iPod. It functions as both a standalone app and an Audio Unit plugin.

### How often is Oscilloscope & Spectrogram updated?

The latest version of Oscilloscope & Spectrogram is 1.0.3, which was last updated on September 4, 2020. While updates have not been frequent recently, the app is stable and functional.

### What is the price of Oscilloscope & Spectrogram?

Oscilloscope & Spectrogram is a paid application, priced at $5.99. There are no in-app purchases or advertisements associated with this app.

## Version history (last 4 releases)

### 1.0.3 — 2020-09-04

Updated spectrogram to eliminate visual discontinuities when viewing sine sweeps.

### 1.0.2 — 2020-08-20

1. Added full screen mode.
2. Frequency line stays in place for 5 seconds after activation.
3. Fixed bugs.

### 1.0.1 — 2020-08-17

Fig bug.

### 1.0 — 2020-08-14

No release notes.

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All apps by Blue Mangoo Consulting Company Limited: https://appshunter.io/developer/1475107602

## Related topics

[oscilloscope audio](https://appshunter.io/ios/topics/oscilloscope-audio) · [oscilloscope pro audio scope](https://appshunter.io/ios/topics/oscilloscope-pro-audio-scope) · [izotope](https://appshunter.io/ios/topics/izotope)

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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 2026-08-23.*