Live Spectrogram vs SignalScope X
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Live Spectrogram
Visualize sound frequencies in real-time with this tool. It displays audio intensity across time and frequency using color, helping you perfect singing, analyze animal calls, or locate household noises.
- Real-time audio visualization
- Frequency analysis
- Time-based spectrum display
- Intensity shown by color
- Singing voice perfection
- Animal call analysis
- Sound source identification
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Visualize audio with this handy tool. It displays the frequencies of sound around you over time. The horizontal axis is time, the vertical is frequency, and the intensity of frequencies is shown using pretty shades of red. Use it to: Perfect your singing voice Analyze the call of animals Identify and locate annoying sounds around your house Learn about the world of frequency analysis I hope you enjoy this handy little tool!
SignalScope X
This app provides powerful measurement and analysis tools for acoustics, audio, and electronics. It offers a free oscilloscope and subscription-based tool sets for basic, advanced, and professional needs, compatible across iPhone, iPad, and Mac.
- Oscilloscope
- FFT Analyzer
- Spectrogram Analyzer
- Data Recorder
- Sound Intensity Analyzer
- Room Acoustics Analyzer
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SignalScope X offers a range of powerful measurement and analysis tools to enhance your productivity in areas such as acoustics (sound and vibration), audio, electronics, and electroacoustics. SignalScope X includes a free oscilloscope tool. SignalScope X makes additional tools available via 3 tiers of subscription-based tool sets to meet your basic, advanced, and professional needs. Each subscription works on your iPhone, iPad, and Mac. Features: - Analyze signals coming from the Mac or iOS device’s current audio input device. - Assign engineering units to your input signals and calibrate external transducers for accurate measurements. - Assign input channel units and sensitivities for individual USB Audio devices. - Connect lab-grade microphones and sensors to your Mac, iPad, or iPhone with suitable interface hardware for precise measurements. - SignalScope offers enhanced support for select hardware from Digiducer, The Modal Shop, and miniDSP. - Nominal acoustic sensitivities included for iPhone and iPad built-in microphones, voltage sensitivities for headset input (including the standard 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 768 kHz, depending on hardware. - 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 from your device via Files (iCloud Drive), iTunes File Sharing, or through a web browser on another device. Files may also be opened in other compatible apps (e.g. Mail, Notes, Numbers, Dropbox, etc). Basic Tools: - Oscilloscope - MultiTool - Powerful data monitoring and project management (Add 2-6 subtools, depending on screen size, and save configurations for easy recall at a later time.) - FFT Analyzer - Spectrum analyzer with user-settable frequency limits and input triggering - 2D Real-time Spectrogram Analyzer - XY Plotter - Create Lissajous curves or visualize your stereo mix - Stereo Signal Generator 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 - Max Levels - Traffic-light-style monitoring - Noise Dosimeter - Data Recorder - Stream up to 8 channels to WAV, AIF, or CAF audio files - Multi-channel Audio File Player - Analyze pre-recorded data Pro Tools: (Pro Tool Set subscription includes all tools) - Dual-channel System Analyzer (Dual FFT analysis with support for Frequency Response Magnitude/Phase, Phase Delay, Group Delay, Coherence, Impulse Response and Cross-Correlation) - Sound Intensity Analyzer - With a suitable p-p probe, measure sound intensity and acoustic particle velocity spectra (narrowband and whole or 1/3-octave bands) and time waveforms. - Room Acoustics Analyzer (T20, T30, T60, nonlinearity, EDT, Early Decay Time, Center Time, Clarity, and Definition in various frequency bands, adjustable Schroeder integration limits) - Polar Plot - Generate beautiful high-resolution plots of polar data. - STI/PA Analyzer - Direct STI and STIPA measurements Additional Pro Features: - User-defined custom metadata in saved audio and data files - 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 - Voltage decibel levels can be displayed in dBV or dBu Subscription Terms: - https://www.faberacoustical.com/apps/subscriptions/terms.html Privacy Policy: - https://www.faberacoustical.com/about/privacy.html Terms and Conditions for FaberAcoustical.com: - https://www.faberacoustical.com/about/terms.html
Screenshots
Verdict
The clearest difference is review sentiment: Live Spectrogram at 63% against SignalScope X's 10%. Live Spectrogram also leads on rating (4.8 vs 3.0) and in-app purchases (none vs 11). SignalScope X's advantage is price (Free vs $1.99) and update cadence (monthly vs every 31 months). On ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
SignalScope X is free to download; Live Spectrogram costs $1.99 up front. SignalScope X sells 11 in-app purchases, starting at $3.49 per month. Live Spectrogram asks for nothing beyond the download.
Live Spectrogram holds the better App Store score, 4.8 against 3.0. Both are backed by a comparable volume of ratings — 6 and 23 respectively. Written reviews point the same way: 63% of Live Spectrogram's written reviews are positive against 10% of SignalScope X's.
Live Spectrogram ships an update every 31 months, SignalScope X monthly. The most recent releases landed on October 14, 2026 and October 16, 2026 respectively.
| Parameter | Live Spectrogram | SignalScope X |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.8 (6 ratings) — better | 3.0 (23 ratings) |
| Positive reviews | 62.5% of reviews — better | 10.2% of reviews |
| Number of ratings | 6 | 23 — better |
| Update frequency | Every 31 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 13.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 15 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Krueger Systems, Inc. | Faber Acoustical, LLC |
Customer experience
Live Spectrogram
SignalScope X
Bugs and requests
Live Spectrogram
Not enough reviews yet to summarise bugs or requests.
SignalScope X
Reported bugs
9 issues- Recording starts and stops
- App crashes on launch
- Oscilloscope and FFT not functioning
- SPL meter inaccurate/uncalibratable
- App not working on older devices
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- File type conflicts
- Data scattered
- App requires subscription for basic functionality
- Old versions no longer supported/functional
Requested features
6 requests- Manual for better understanding
- Ability to store and retrieve setups
- One-off payment option
- More intuitive user interface
- Ability to change Y-axis scale
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- Support for Audiobus output
In-app purchases
Live Spectrogram
No in-app purchases
SignalScope X
- Basic Tool Set, 1 Month14 Days trial$3.491 Month
- Advanced Tool Set, 1 Month14 Days trial$9.991 Month
- Pro Tool Set, 1 Month14 Days trial$24.991 Month
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- Basic Tool Set, 1 Year14 Days trial$34.991 Year
- Advanced Tool Set, 1 Year14 Days trial$99.991 Year
- Pro Tool Set, 1 Year14 Days trial$249.991 Year
- 14-day Free Trial, Pro Tool SetFree
- Basic Tool Set 2026$69.99
- Advanced Tool Set 2026 from Basic$219.99
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- Pro Tool Set 2026 from Advanced$309.99
- Pro Tool Set 2026 from Basic$439.99
Questions
Is Live Spectrogram free?
Is SignalScope X free?
Which has better reviews, Live Spectrogram or SignalScope X?
Do Live Spectrogram or SignalScope X have ads?
Which is updated more often, Live Spectrogram or SignalScope X?
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