SignalScope X vs Spectrolite
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SignalScope X
This app provides advanced signal analysis tools for acoustics, audio, and electronics. It offers a free oscilloscope and tiered subscriptions for additional measurement and visualization capabilities across iPhone, iPad, and Mac.
- Oscilloscope tool
- FFT spectrum analysis
- Real-time spectrograms
- Data recording and export
- Support for external hardware
- Frequency response correction
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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 up to 6 subtools 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
Spectrolite
This app visualizes sound in real-time using various spectrogram types. Explore detailed audio data with intuitive touch controls and adjustable parameters. An optional purchase unlocks advanced measurement tools.
- Real-time spectrogram visualization
- Constant-Q, linear, and mel frequency scales
- Full human hearing frequency range
- Intuitive touch panning and zooming
- Adjustable gain, Q, and other parameters
- Pro version: grids, scales, spectrum view, tap-to-measure
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Spectrolite visualizes sound as spectrograms in real time. Spectrolite supports constant-Q spectrograms, which use a logarithmic frequency scale for a display where musical notes are evenly spaced. Spectrograms based on linear and mel frequency scales are also supported. The display covers the full frequency range of human hearing. Intuitive touch panning and zooming lets you dive in and explore the spectrograms in detail. Gain, Q, and other parameters can be adjusted in real time and instantly apply to the display of past signals as well as future ones. The Pro in-app purchase adds grids and scales for time, frequency, and amplitude, as well as a spectrum view and a tap-to-measure function. This expands Spectrolite into an audio measurement tool that you can use to measure frequencies, musical pitches, amplitudes, and durations.
Screenshots
Verdict
The clearest difference is review sentiment: Spectrolite at 83% against SignalScope X's 10%. Spectrolite also leads on rating (4.7 vs 3.0) and iOS requirement (15.6 vs 18.6). SignalScope X's advantage is update cadence (every 3 weeks vs every 8 months). On price, ratings volume, ads and in-app purchases 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
Both are free to download. SignalScope X sells 10 in-app purchases, starting at $3.49 per month and Spectrolite sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Spectrolite holds the better App Store score, 4.7 against 3.0. Both are backed by a comparable volume of ratings — 23 and 66 respectively. Written reviews point the same way: 10% of SignalScope X's written reviews are positive against 83% of Spectrolite's.
SignalScope X ships an update every 3 weeks, Spectrolite every 8 months. The most recent releases landed on November 10, 2026 and November 7, 2026 respectively.
| Parameter | SignalScope X | Spectrolite |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (23 ratings) | 4.7 (66 ratings) — better |
| Positive reviews | 10.2% of reviews | 83.3% of reviews — better |
| Number of ratings | 23 | 66 — better |
| Update frequency | Every 3 weeks — better | Every 8 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 18.6 | 15.6 — better |
| Further details — not scored | ||
| Size | 19 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Faber Acoustical, LLC | Waxing Wave |
Customer experience
SignalScope X
Spectrolite
Bugs and 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
Spectrolite
Not enough reviews yet to summarise bugs or requests.
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$199.99
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- Pro Tool Set 2026 from Advanced$309.99
Spectrolite
- Pro$4.99
Questions
Is SignalScope X free?
Is Spectrolite free?
Which has better reviews, SignalScope X or Spectrolite?
Do SignalScope X or Spectrolite have ads?
Which is updated more often, SignalScope X or Spectrolite?
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