Oscilloscope 4+

Test audio and analog signals‪.‬


    • 4.3 • 16 Ratings
    • $19.99



"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

What’s New

Version 2.6.9

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

Ratings and Reviews

4.3 out of 5
16 Ratings

16 Ratings

GilesInDisguise ,

CRAZY awesome, but a few requests

Really love this app. I use it to visualize musical waveforms for projection with video synthesis and analog glitch mixing. Given that my use for this is 100% for visual enjoyment and has no technical purpose to me, I would love more options over controlling the appearance of the waveforms. Especially contrast, color, removing the grid, line thickness, and other things. This could be a really fantastic visualization app if it wanted to be. I’m currently using mine with a Roland Go Mixer for direct digital audio and an Apple TV to mix it into my video rig. Works fantastic! Turns my iPad into a really freaking slick AV toy.

colordeaf ,

My favorite app

This to me is exactly the ideal product of an app development community and app marketplace. I love this thing. This makes any iOS device an double as an incredibly useful tool in a new, unique way. That is to say it's also the best app among the category of all oscilloscope apps I have tried. The UI is super simple, to the point of actually being beautiful. The pinching is a little hard to get used to. I would slip at first and adjust the offset when I was trying to adjust the voltage. Now I still slip a little when adjusting the time base, but it's easy enough to correct. And Auto makes it easy to not even worry about any of that. Thank you. Well worth the price.

flux302 ,

Great works with ES-8 D.C. Coupled interface

This is the best app I've found so far that works with expert sleepers es-8 audio interface (es8 has D.C. Inputs and outputs ) the buffer settings could be larger for better LFO viewing but this is by far the best I've seen. Controls could be a bit better and there is no analog persistence mode to make it look pretty. But over all it's really great for the money. Hope this continues to get updates!

App Privacy

The developer, ONYX Apps, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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