SignalScope X offers professional, advanced, and basic tool sets for use in areas such as acoustics, audio, electronics, and vibration.

SignalScope X includes a free oscilloscope and subscription-based tool sets to meet your more serious needs.

SignalScope X’s Pro Tool Set subscription includes all the functionality previously present in SignalScope Pro, SoundMeter Pro, IOScope, and RoomScope, and adds 3 powerful new tools.

- Analyze signals coming from the iOS device’s current audio input device or built-in accelerometer.
- Assign input channel units and sensitivities for individual USB Audio devices.
- Direct support for Digiducer, Studio Six Digital, and select miniDSP hardware devices.
- Nominal acoustic sensitivities included for iOS device microphones, voltage sensitivities for headset input (including the Lightning-to-headset adapter)
- Manually switch between available audio input and output sources.
- Load microphone frequency response data (FRD) and apply frequency response correction (FRC) to FFT-based measurements.
- Manually adjust audio sample rates, even up to 192 kHz, depending on input hardware.
- Assign engineering units to your input signals and calibrate external transducers for accurate measurements.
- Save acquired measurement data to CSV, TXT (tab-delimited), or MAT files.
- Save high-resolution analyzer display images to PDF files.
- Retrieve your data files via Files (iCloud Drive), iTunes File Sharing, or through a web browser on another device.

Basic Tools:
- Oscilloscope - Basic oscilloscope and triggering functions.
- FFT Analyzer - Spectrum analyzer with user-settable frequency limits and basic triggering
- 2D Real-time Spectrogram Analyzer
- XY Plotter - Create Lissajous curves on your iOS device.

Advanced Tools: (Advanced Tool Set also includes basic tools)
- 3D Real-time Spectrogram Analyzer - Stunning live visualization of incoming data
- Octave-band Analyzer - Whole and 1/3-octave RTA
- Level Meter - Overall signal level meter
- Noise Dosimeter
- Data Recorder - Stream up to 8 channels to WAV, AIF, or CAF audio files.
- Stereo Signal Generator

Pro Tools: (Pro Tool Set subscription includes basic and advanced tools)
- Dual-channel System Analyzer (Frequency Response Magnitude/Phase, Phase Delay, Group Delay, Coherence, Impulse Response and Cross-Correlation)
- Room Acoustics Analyzer (T20, T30, T60, nonlinearity, EDT, Early Decay Time, Center Time, Clarity, and Definition in various frequency bands, adjustable Schroeder integration limits)
- MultiTool - Powerful data monitoring and project management (Add up to 2 subtools on iPhone, 6 subtools on iPad Pro with 10.5-inch or larger display, 4 subtools on other iPad models, and save an arbitrary number of different configurations for easy recall at a later time.)
- Multi-channel Audio File Player - Analyze pre-recorded data.

Additional Pro Features:
- Data logging support in the Level Meter, Octave Analyzer, and Noise Dosimeter
- Percentile exceeded sound levels in the Level Meter and Octave Analyzer
- NC, RNC, and NR references curves, NC, SIL, and NR values in the Octave Analyzer

Regarding subscriptions
- Payment will be charged to your iTunes Account at the end of the free trial period, unless you have turned off automatic renewal. If the free trial has already expired, payment will be charged at confirmation of subscription purchase.
- Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period.
- Your account will be charged for renewal within 24 hours prior to the end of the current period for the same price as the current period.
- You may manage your subscriptions and auto-renewal may be turned off by going to your iTunes Account Settings after purchase.
- Any unused portion of the free trial period will be forfeited when you purchase a subscription, where applicable.
- Terms and Conditions, and Privacy Policy, may be accessed at

What's New

Version 10.3

- The FFT Analyzer, Octave Analyzer, and Dual FFT Analyzer tools can now be used as free readers for data files created by these same tools when no subscription is active. This allows for sharing of data files with other users who can then view the data for free, without the need for a subscription. It also allows for users who generated the data files to continue to view them if their subscription ends.
- All tool tabs are visible, regardless of the current subscription status.
- The current subscription level is identified in the Help screen, as well as in the Tool Sets tab.
- Minor bug fixes and cosmetic improvements.

Ratings and Reviews

Too expensive


While this is a great 5-star app, it's way to pricey for me. For less than the cost of a yearly subscription to the advanced tools, I bought a handheld rechargeable digital color oscilloscope that does FFTs, measures voltages, and supports 2 channels simultaneously. Much more versatile without the need for my phone. It may not have all the features this app has, but you gotta draw the line on over-priced software. Maybe if I owned a high-end recording facility...

I've found so many uses for the hand-held scope. And I get free upgrades for life as new features come out. Oh, yeah, it also self-calibrates.

When software is more expensive than a stand-alone device, somethings wrong.

Developer Response

Hello Afflikted1,
We're pleased to hear that you think SignalScope X "is a great 5-star app." We would certainly appreciate your 5-star rating.
Would you be willing to share with us the make and model of the handheld scope you mentioned? Does it offer any functionality that is germane to SignalScope X's Advanced Tool Set or is it more comparable to the Basic Tool Set, which is considerably less expensive?



The scourge of iOS app sales/development..unnecessary subscription sales. Nice try but no sale here.

U guys made a mistake


I paid $70 for the pro app 5 years ago. It was expensive for an app, but i feel I’ve gotten my money’s worth. I really love the pro app. As a professional sound engineer, what i use the most is the octave analyzer. And it’s just crazy to think i’m going to now pay over $70 a year to get that analyzer. When i just found a pretty decent one for $4.99. A one time payment!! Dude.... Its a smartphone! We all know this app is really tight and well done and its kindda close to what u get out of a real pro meter. But its a smartphone microphone!!! The hardware is simply not that accurate for u guys to pretend this product is worth over $70 a year. Get off that cloud. Its really sad because i really loved this app. I would even pay the $1.99 a month on top of the initial $70 i paid because its a work tool and i understand u have to keep updating the app with every new iphone that comes out, but... the cheaper subscriptions dont have the octave analyzer! I hope u guys open ur eyes.

Developer Response

Hello iMAF,
Thank you for letting us know how you feel about the change in our business model. I understand that it can be frustrating to learn that support for a beloved product has come to an end.
We would be interested to know your thoughts about the new app. (Since you love SignalScope Pro, I'm guessing your 1-star rating is not a reflection on SignalScope X's features, functionality, or robustness).
Also, if you will contact us and let us know about the app you found for $4.99, we'll take a look at it. If it offers everything SignalScope X's octave analyzer does, we'll give you a 1-year Advanced Tool Set Subscription for free.


Basic Tool Set, 1 Month

Access to SignalScope X's basic tool set.

Free Trial

Advanced Tool Set, 1 Month

Access to SignalScope X's advanced tool set.

Free Trial

Pro Tool Set, 1 Month

Access to SignalScope X's pro tool set.

Free Trial


Faber Acoustical, LLC
35 MB
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
This app may use your location even when it isn't open, which can decrease battery life.
© 2018 Faber Acoustical, LLC
In-App Purchases
  1. Basic Tool Set, 1 Month $1.99
  2. Pro Tool Set, 1 Month $19.99
  3. Advanced Tool Set, 1 Month $7.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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