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 Scope

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 10.8.3

- The Max Levels tool has received some cosmetic changes and the ability to save and restore level limit settings for both indicators and all frequency bands.
- Automatic calibration of an accelerometer with units set to ‘m/s^2’ now sets the sensitivity correctly.
- Minor bug fixes and cosmetic improvements.

Ratings and Reviews

2.4 out of 5
39 Ratings

39 Ratings

Pepsy-PPC Productionz ,

Great audio analysis tools

SignalScope X audio analysis tools offer quite a lot of signal information in exchange for the monthly subscription rate.

With the newest release, Faber Acoustical gives the user even more bang for their buck with the addition of new sound analysis tools such as “RoomScope,” and enhanced file handling capabilities which can be used even without a subscription.

The variety of subscription plans and rates provide pro audio analysis solutions that accommodate any budget.

tbitson ,

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?

Brianmstephens ,

Shame on you. Restore my SignalScope original

I loved the original SignalScope app and purchase almost all of the optional capabilities to the tune of ~$90 and used them frequently for casual audio engineering and musical curiosity. I showed it off to my engineering friends and musician friends alike all the time.
With the later “upgrade” to SignalScope X which doesn’t have any of my add ins I can’t do anything cool at all without buying an $8/month subscription. NOW YOU BRICKED THE OLD SIGNALSCOPE APP AND IT WONT OPEN AND I AM BEYOND FURIOUS. I’ve already spent a whole lot on your company and app and then you want more money to do the same thing???!? Shame. One star. Goodbye.

Developer Response ,

Hello Bgomerian,
We certainly understand your frustration that the original SignalScope does not work with iOS 13. Please understand that we did not brick the app. It works as well as ever on the versions of iOS it was designed for. We removed it from sale on the App Store in July, 2018. At that time, we could not predict that iOS 13 would break compatibility with our legacy apps (iOS 11 was still current at that time). We're sorry we can't offer free upgrades forever for each app, but that would be economically impossible for us to do. For those who need to run SignalScope on the newest version of iOS, we offer the subscription-based SignalScope X, as well as 3 perpetual license versions of SignalScope (which will also be retired and replaced at some point).


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
33.5 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
This app may use your location even when it isn't open, which can decrease battery life.
In-App Purchases
  1. Basic Tool Set, 1 Year $17.99
  2. Basic Tool Set, 1 Month $1.99
  3. Advanced Tool Set, 1 Year $71.99


  • Family Sharing

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

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