Audio / Spectrum Analyzer
Audio / Spectrum Analyzer Summary
Audio / Spectrum Analyzer is a ad-supported, with in-app purchases iOS app in Music And Audio by Loop-Sessions.LLC.. Released in May 2020 (5 years ago). It has 1.2K ratings with a 4.66★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 4.7K monthly active users and generates around $<10K monthly revenue (39% IAP / 61% ads). Store metadata: updated Mar 26, 2026, version 2.1.1.
Recent activity: 12 new ratings this week View trends →
Data tracking: SDKs and third-party integrations were last analyzed on Mar 12, 2026.
Store info: Last updated on App Store on Mar 26, 2026 (version 2.1.1).
Audio / Spectrum Analyzer was last scanned for SDKs 2026-03-12. Below is the overview of third party companies detected in the app. The full list of raw SDKs, app permissions and unknown SDKs is available here.
Google4.66★
Ratings: 1.2K
Screenshots
App Description
This RTA app supports simultaneous display of "audio waveform" and "amplitude spectrum" (size of FFT calculation result for each frequency) for audio signals input from a microphone.
(FFT: Fast Fourier Transform, RTA: Real Time Analyzer)
[Features]
- Supports simultaneous display of waveform / spectrum.
- Supports orientation both portrait and landscape.
- Selectable configuration of "waveform" / "spectrum" display.
- Selectable FFT size.
- Selectable Spectrum Average.
- Selectable window function. (used in spectrum calculation)
- Selectable frequency weighting. (Flat, dBA, dBC)
- Selectable the type of expressing the X direction (frequency) of the spectrum. (Linear, Log)
- Displays the peak level and its frequency of the spectrum.
- Peak Hold (displays the results of holding past peak values of the spectrum).
- Octave Analysis (displays the spectrum divided into octave bands).
- Generates the audio signal (Sine, Triangle, Squire, Saw)
- Generates the noise signal (white noise, pink noise)
- Pitch meter display.
[Setting items]
1. Screen structure :
Screen configuration can be selected.
- Wave: Display waveform only.
- Spectrum: Display spectrum only.
- Vertical: Display waveform / spectrum vertically.
- Horizon: Display waveform / spectrum horizontally.
2. Spectrum X Scale Type :
Selectable the type of expressing the X direction (frequency) of the spectrum.
- Linear: Distributed at equal intervals
- Log: The intervals increase logarithmically
3. FFT size :
Selectable FFT size. (number of samples used when performing FFT)
1024, 2048, 4096, 8192
4. Spectrum Average
Number of spectrum average for a display of spectrum. (init value: 1)
Higher value will make the spectrum less noisy and more smooth, at the cost of lower time resolution.
1, 2, 4, 8
5. Window function :
Selectable window function (multiplication just before FFT) used for spectrum calculation.
Hanning, Hamming, Blackman, No window
6. Frequency Weighting :
Selectable frequency weighting.
- Flat (Z-weighting): No frequency weighting is applied.
- dBA (A-weighting): Frequency response that takes into account human hearing.
- dBC (C-weighting): Relatively flat response.
7. Peak Hold :
Displays the results of holding the past maximum values (peak values) of the spectrum.
8. Octave Analysis :
Displays the results of classifying the spectrum into octave bands.
Division method:
- FFT: