# Oscilloscope — Test audio and analog signals.

> Portable oscilloscope app for analog and audio signal analysis. (iPhone/iPad app by ONYX Apps.)

- Source: https://appshunter.io/ios/app/oscilloscope/id388636804 (this page in markdown: same URL + `.md`)
- Developer: [ONYX Apps](https://appshunter.io/developer/356553882)
- Category: Music, Utilities
- Price: $19.99
- Rating: 4.10/5 from 19 App Store ratings · 53 written reviews indexed
- Age rating: 4+
- Requires: iOS 16 · 8 MB
- Released: 2010-09-27
- Data updated: 2026-08-23
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/oscilloscope/id388636804/reviews.md

## What is Oscilloscope?

"I use this for analog, and audio measurements. Attach an Apple USB adapter and a $40 stereo A-D converter available online, and my iPad is like a $300 O'Scope." -thymeout-

Oscilloscope app is great for analyzing audio range signals, or learning oscilloscope measurement basics. The interface includes many standard oscilloscope controls, such as: triggering, time and voltage per division, signal measurement cursors, and more.

The app incorporates a signal (function) generator capable of generating sine, square, triangle, and sawtooth waveforms of up to 22 KHz. Calibration to an external reference signal is supported, guaranteeing the accuracy of measurements. 

Input can be acquired via the built-in microphone or an external mic/probe connected to the headset connector. For best results, use an external audio interface connected to your device dock. This allows for standard audio equipment to be connected, as well as for dual channel input. Oscilloscope probes also be connected (using a BNC connector). When feeding external signals via probes, you should take care not to exceed 1V AC voltage. Currently iDevices support only AC input. 

For up-to-date information on feeding signals and currently supported audio interfaces, please visit http://oa.onyx3.com
 

Feature Highlights: 
● Real-time waveform display (60 FPS) 
● Triggering modes: Normal, Auto, Single 
● Set trigger level and pre-trigger time 
● Dual channel signal generator 
● Reference signal calibration 
● Pause function to get a screen capture 
● Export traces as text file for further analysis
● Measure signal data using cursors 
● Use "finger pinch" on screen to set voltage and time base 
● Double tap screen to enter Black Panel mode 
● Three color themes to choose from 
● XY mode for viewing Lissajous figures 
● Frequency range 20Hz-22KHz 
● iPhone X ready

## Key features

- Real-time waveform display
- Triggering modes
- Signal measurement cursors
- Built-in signal generator
- Dual channel input support
- Reference signal calibration
- Export traces as text file

## Recent user reviews (10 of 53)

All indexed reviews: https://appshunter.io/ios/app/oscilloscope/id388636804/reviews.md

### 4/5 — One missing feature

*2026-02-20*

It would be AWESOME if there was an audio player for loading mp3 files and viewing the stereo signals in XY mode!

### 1/5 — Not auv3

*2025-11-08*

Don’t make the same mistake I did, this is not an auv3

### 1/5 — ET

*2025-06-15*

Love your work!

### 3/5 — Screen Hog 🖥🐽

*2022-12-20*

Needs split view mode to analyze internal apps without having to switch screens

### 5/5 — Pls one of the devs respond!

*2021-12-16*

Hi, I love this app, but I was thinking there would be audio for the input mode )): Is there a way to turn on audio?? Or is it just waves. Please help! I really bought this for the purpose of trying to learn how to make music videos with it, and it’s well.. I cant make music videos without music. So pls help! Thanks!

### 4/5 — Oscilloscope App

*2021-08-12*

I have been searching for some time for an App that would enable to view circuit waveforms because in my location and situation purchasing a DSO is a very expensive option.
This App has become an essential part of developing a circuit design.
The only limitation is the frequency range but for my design work that isn’t an issue.
An improvement that I would appreciate is the ability to expand the timebase to less than 500mS - say to 50ms. This would help to examine waveforms in greater detail.
Building my own interface was not an issue, but for beginners it might prove to be a challenge.
I am very happy to recommend this App to other Electronic Engineers.

### 5/5 — Please update for recent iOS

*2020-12-14*

App works great, and developers respond to reviews.  Thank you.

**Developer response:** Hi, Sorry for the inconvenience. This is a known issue with the latest iOS update. Simply delete and reinstall the app and it should work. With any issues, please contact us directly at apps@onyx3.com

### 4/5 — Super Sensitive-the way it should be

*2020-01-06*

very useable audio scope. One thing they definitely need to do is add a snapshot or screen capture utility. Right now, all you can do is look at the signal. Also some kind of export to raw feature would be usable to tech’s. Thanks

### 5/5 — Very handy app

*2019-10-14*

I wish there was a way to turn off AUTO mode and revert to the previous settings if you have tapped AUTO by mistake

### 3/5 — Application Not accessing mic

*2019-07-27*

I have Ipad pro 2018 ios 12.4 and the application is not accessing the built in ipad microphone which kinda bums me out because i bought it just to play around with the XY scope... any way you guys can fix this? ...Thank you

## Frequently asked questions about Oscilloscope

### What does the Oscilloscope app do?

This app functions as a portable oscilloscope, allowing you to analyze audio and analog signals. It provides real-time waveform display, various triggering modes, and controls for time and voltage per division. You can also use it for learning oscilloscope measurement basics.

### What are the key features of the Oscilloscope app?

Key features include real-time waveform display at 60 FPS, multiple triggering modes (Normal, Auto, Single), signal measurement cursors, and a built-in signal generator capable of producing sine, square, triangle, and sawtooth waveforms up to 22 KHz. It also supports dual channel input and reference signal calibration.

### How much does the Oscilloscope app cost?

Based on the provided information, the application is a paid app. There are no mentions of in-app purchases or subscription models, indicating a one-time purchase for the full functionality.

### What devices is the Oscilloscope app compatible with?

The app is designed for iDevices and is iPhone X ready. It supports input via the built-in microphone, external mics connected to the headset connector, and external audio interfaces connected via the device dock. Oscilloscope probes can also be connected.

### What are common use cases for the Oscilloscope app?

Common use cases include analyzing audio range signals, learning fundamental oscilloscope measurement techniques, and using a mobile device as a portable oscilloscope for on-the-go testing. It's also useful for generating and observing various waveforms for electronic projects.

## Version history (last 5 releases)

### 2.6.9 — 2023-11-03

- Support for latest devices and resolutions
- Fixed a minor graphics issue

### 2.6.3 — 2018-11-02

Thank you for helping us improve Oscilloscope app! Please rate it on the App Store now, so we can make it even better!

● Support for the latest iOS and devices
● Fixed microphone permission issue with iOS 12

### 2.6.1 — 2015-08-12

Thank you for helping us improve Oscilloscope app! Please rate it on the App Store now, so we can make it even better! 

● 64-bit
● Minor fixes

### 2.6 — 2014-12-17

Thank you for helping us improve Oscilloscope app! Please rate it on the App Store now, so we can make it even better! 

● Native iPhone 6 graphics
● Export traces as text file for further analysis
● Bigger UI controls for easier operation
● Does not mute other audio
● Stability improvements

### 2.1 — 2013-01-04

Thank you for helping us improve Oscilloscope app! Please rate it on the App Store now, so we can make it even better! 

● Minor fixes

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All apps by ONYX Apps: https://appshunter.io/developer/356553882

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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.*