Features & Capabilities

ListenAid - precise, clean & fast audio spectrum analysis.

Turn your iPhone, iPad, or Mac into an easy to read and beautifully intuitive high-precision audio analyzer.

ListenAid is a professional-grade FFT Real-Time Spectrum Analyzer (RTA) and Spectrogram designed for audio engineers, acoustic consultants, musicians, and students. Built entirely on Apple’s Accelerate framework and Metal graphics, it delivers incredibly fluid, high-resolution analysis.

Whether you are tuning a PA system, analyzing room acoustics, or visualizing the harmonic content of an instrument, ListenAid provides the tools you need to visually interpret what you can hear.

HIGH-PERFORMANCE VISUALIZATION

  • Metal-Accelerated Graphics: Experience a silky-smooth 60/120 fps display that visualizes audio data in real-time without draining your battery.
  • Hybrid View: View the instantaneous FFT spectrum and the scrolling Spectrogram history simultaneously.
  • Gestures: Pinch to zoom frequency and amplitude axes independently. Double-tap to reset.

ADVANCED DSP ALGORITHMS

  • Standard FFT: Fast Fourier Transform with adjustable buffer sizes (up to 65,536 points).
  • Multi-Resolution Spectrogram: Divides the Spectrum into three bands with individual time and buffer resolutions
  • CQT, QTAM & CWT: Variable-Q and Continuous Wavelet Transforms for musically relevant analysis.
  • Transfer Function: Compare a live signal against a reference signal (Dual-Channel Analysis).

PROFESSIONAL AUDIO ROUTING

  • Multi-Channel Support: Fully supports external USB audio interfaces. Select specific input channels for measurement and reference.
  • High Sample Rates: Supports hardware sample rates up to 384kHz (and higher, hardware dependent) for high-resolution analysis.
  • Smart Bluetooth: Intelligently manages Bluetooth profiles to ensure high-quality monitoring without degrading input quality.

SYSTEM TEST & TOOLS

  • Signal Generator: Built-in low-distortion Sine Wave generator.
  • Loop Player: Playback your own test loops or music directly from the app to test system response.
  • Cursor Mode: Inspect specific frequencies with a cursor showing Hz, dB, Musical Note, and Cents deviation.
  • Peak Tracking: Automatically detect and track the strongest frequencies with high-precision interpolation.

REMOTE (via MCF)

  • Control one app remotely via another instance of the app - walk the room with your mobile, controlling your laptop/iPad
  • Trigger loops, sweep a sine, toggle L/R-Solo, or invert polarity remotely while walking the room.

TECHNICAL SPECIFICATIONS

  • True dual channel simultaneous independent real-time FFT
  • Window Functions: Hanning, Hamming, Blackman, Flat-Top.
  • Averaging Modes: RMS, Exponential, Peak Hold, Off.
  • Overlap up to 256x
  • Smoothing up to 1/96 Octave
  • Resolutions: FFT sizes from 256 to 65k.
  • Scales: Logarithmic (Hz) and Linear (Musical Note/Piano Roll).
  • Color Maps: Greyscale, Inverted, Lava, Orange & Teal, Infrapink

WHO IS THIS FOR?

  • Live Sound Engineers: Ring out feedback and tune systems using the built-in generator and transfer function.
  • Studio Engineers: Visualize the frequency spectrum of your mix in high detail.
  • Musicians: Use the precise Note/Cents cursor for instrument intonation.
  • Educators: Visualize sound waves and harmonics in the classroom.

Privacy Policy: ListenAid processes all audio data locally on your device. No audio is ever recorded or transmitted to the cloud.

User Growth & Download Statistics

App
By:
Michael Reisigl
Rating:
5.00
(4)
Version:
18 Last updated: 2026-05-07
Version code:
885374539
Creation date:
2025-06-30
Compatible devices:
Size:
4.20MB
Price:
4.99
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Apple Apps Store
Data ingested on:
2026-06-10
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.
Developed by:
Michael Reisigl
Apple Apps Store
https://apps.apple.com/at/app/listenaid/id6747974662?l=en-GB
Website:
http://www.terabel.at

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