# iMSO — Handheld Oscilloscope

> Mobile mixed-signal oscilloscope for analyzing analog and digital signals. (iPhone/iPad app by Oscium LLC.)

- Source: https://appshunter.io/ios/app/imso/id411757356 (this page in markdown: same URL + `.md`)
- Developer: [Oscium LLC](https://appshunter.io/developer/411757369)
- Category: Productivity, Utilities
- Price: Free
- Rating: 3.20/5 from 6 App Store ratings · 28 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 11 MB
- Languages: American English
- Released: 2011-03-01
- Data updated: 2026-06-02
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/imso/id411757356/reviews.md

## What is iMSO?

Oscilloscope your phone, touch or tablet! 
iMSO allows you to analyze 2 analog and up to 4 digital signals using the iMSO-204 mixed signal oscilloscope hardware. Although demo mode is available for free with this download, hardware must be purchased to fully enable the product. 

- It's the first mixed signal oscilloscope available in the app store (50MSPS / 5MHz) 
- Easiest, most intuitive scope you’ll ever use 
- Preferred scope for the next generation of inventors 

Software demo mode includes: 
- Simulated wave display (sine, square, sawtooth, and triangular) 
- Cursors w/ measurements 
- Direct signal measurements 
- Analog triggering 
- Run / Stop / Single mode 

Hardware mode includes: 
- Analog triggering 
- Digital triggering 
- Cursors w/ measurements 
- Direct signal measurements 
- 1x or 10x probe setting 
- Run / STOP / Single mode 

Hardware works with the following devices: 
- iPad mini 3
- iPad mini 2
- iPad mini 
- iPad Air 2
- iPad Air 
- iPad 4 
- iPad 3 
- iPad 2 
- iPad 
- iPhone 6 Plus
- iPhone 6
- iPhone 5C 
- iPhone 5S 
- iPhone 5 
- iPhone 4S 
- iPhone 4 
- iPhone 3GS 
- iPod touch [3rd (32GB only), 4th and 5th generation)

## Key features

- Mixed-signal oscilloscope
- Analog and digital signal analysis
- Simulated wave display
- Cursors with measurements
- Direct signal measurements
- Analog and digital triggering

## Recent user reviews (10 of 28)

All indexed reviews: https://appshunter.io/ios/app/imso/id411757356/reviews.md

### 1/5 — Very disappointing

*2018-01-13, version 3.1*

I had very high hopes for the 204x, based on earlier reviews. Reality seems to be very different. The hardware is possibly fine, but the iOS and Mac apps are so bug-ridden that it is unusable. Specifically, exporting CSV files containing data simply doesn’t work.

On iOS you only get one partial channel, sometimes as a row, sometimes as a column, apparently related to time base, but no explanation of why the difference, even in the pdf manual. And if you delete all the files (there is no way to force a new one - that seems to be random), it generally fails to create another one next time you try to start the logger.

On the Mac app it uses your iCloud/Documents directory, and shows you all the files in there. And you can’t scroll - it will only advance one file at a time through a view of three files. And if you do, finally, find the log file, the only option is to email it, and if you select that it gives an error that mail is not set up, even when it is. You can’t scroll on the help (i) screens either, so you can only read the top of them.

I’m very surprised at the catastrophically poor standard of these apps. The 204x is on its way back to Amazon.

### 5/5 — Really impressive app

*2014-06-04, version 2.7*

The double axis cursors make the measurement far better than the large oscilloscopes that we use in our lab courses. Well thought out app and fast enough to work with our photon detectors.

### 5/5 — HomeTech

*2013-12-28, version 2.7*

Innovative, good to see the minds in America are still solving problems.

### 5/5 — Compact and Handy

*2013-03-22, version 2.6*

My wife surprised me with this for Christmas.  I was skeptical until I started to use it.  This will never take the place of my beloved 100 MHz HP oscilloscope, but for a lot of what I do, this gets the job done and it does not need a scope cart.  I am finding more and more uses for it as time goes on.  My iPad 1 will never be without a job now.

### 5/5 — Great pocket oscilloscope

*2013-03-04, version 2.6*

I've had this oscilloscope for a few years now and it is great for doing field work on things like serial lines.  My only wish is that they make it sample faster.

True, it doesn't compare to my tek scope, but I leave it in my work bag so I always have it and that's kind of the point. 

For all those who complain that isn't a free oscilloscope, read the website.   This is the software to support the hardware you buy.  You don't get a free tv with Samsung remote apps.   Same thing

### 1/5 — Stinks

*2013-01-15, version 2.6*

It doesn't work or I just don't know how

### 5/5 — A little quirky but excellent

*2012-11-28*

Takes a little time to get used to the interface, and a few bits that are not intuitive. But overall for the money it's a great little tool and sooo much more convenient than a full blown scope

**Developer response:** Wonder if we've sorted all the bugs you've mentioned. Ping us with specific feedback at support@oscium.com if there's anything else we can do to improve. Thank you for the five star review. We know we can always improve and with your help, we will.

### 5/5 — Great Little Scope

*2012-11-05, version 2.4*

It might seem like a steep price for a single analog/four digital scope with limited bandwidth, but the portability makes up for it.

An iPad screen is great for kitchen table projects, but the small iPhone screen is perfect for everything else.

The menus are easy to navigate and there seem to be a lot of features that you would expect only on more expensive scopes.

The one feature that I'm not crazy about (but need to use most often) is the pinch-to-zoom method of changing the volts/division and the time scale. Although that's the normal method for this platform, it's a little cumbersome with this application.  It's not so bad on the iPad, but it's not as easy to use on the iPhone.  I'd rather have buttons to change the scales.

As my first real, use of the scope, I was debugging an Arduino project.  Being able to immediately identify an error that was causing an incorrect duty cycle on an output was a huge time saver.

### 5/5 — Good product

*2012-09-13, version 2.2*

Works well enough for my needs. This is a good first iteration.

### 5/5 — Great Product

*2012-08-30, version 2.2*

The iMSO is a great tool for anyone working towards a 2/4 year Electronics Engineering or related degree.

I encourage any student of said fields to check it out, as it should handle many of the analog/digital measurements you will make during labs.

Unless you have found a better MSO that fits in your pocket (for $300 or less), the number of features found on the iMSO will easily make up for any limitations that you might find.

## Frequently asked questions about iMSO

### What does the iMSO app do?

The iMSO app turns your phone, tablet, or iPod touch into a mixed-signal oscilloscope. It allows you to analyze analog and digital signals when used with the iMSO-204 hardware. The app offers features like wave display, cursors with measurements, and triggering modes.

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

Key features include the ability to analyze analog and digital signals, a simulated wave display for demo mode, cursors with direct signal measurements, and various triggering options. In hardware mode, it supports both analog and digital triggering, probe settings, and run/stop/single modes.

### Is the iMSO app free to use?

A demo mode of the iMSO app is available for free, allowing you to explore its features with simulated wave displays. However, to fully utilize the oscilloscope's capabilities and analyze real signals, you must purchase the iMSO-204 mixed-signal oscilloscope hardware.

### What devices are compatible with the iMSO app?

The iMSO app is compatible with a wide range of Apple devices, including various iPad models (iPad mini, iPad Air, iPad 2-4), iPhone models (iPhone 4S and newer), and iPod touch (3rd, 4th, and 5th generation). Specific compatibility details are listed in the app's description.

### Who is the target audience for this app?

This app is designed for inventors, engineers, students, and electronics hobbyists who require a portable and user-friendly tool for analyzing electronic signals. It's particularly suited for those who need to examine both analog and digital waveforms on the go.

## Version history (last 5 releases)

### 4.0 — 2019-07-29

Bug fixes.

### 3.4 — 2018-11-24

Bug fixes and UI enhancements.

### 3.3 — 2018-10-09

Bug fixes and UI enhancements.

### 3.1 — 2017-08-14

Fixed bugs.
* Special thanks to Bill for the bug report.

### 3.0 — 2017-07-27

*Added support for iMSO-204.
*Added all the features from iMSO2.

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## More apps by Oscium LLC

- [WiPry](https://appshunter.io/ios/app/wipry/id442143525)
- [LogiScope](https://appshunter.io/ios/app/logiscope/id504300523)
- [iMSO2](https://appshunter.io/ios/app/imso2/id658508510)
- [Air Viewer](https://appshunter.io/ios/app/air-viewer/id1443622325)
- [ChanLite](https://appshunter.io/ios/app/chanlite/id6752271652)

All apps by Oscium LLC: https://appshunter.io/developer/411757369

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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 2026-06-02.*