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Audio / Spectrum Analyzer

Audio / Spectrum Analyzer

RTA (FFT / Spectrogram)

1K ratings
97 reviews
With Ads
🔧 Utilities
🎵 Music
$10.99 Free
In-App PurchasesWith Ads

Lowest price: Free 4 years ago (-100%)

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Price history

Details

  • Released
  • Updated
  • May 18, 2020
  • August 24, 2026

Developer

Loop-Sessions.LLC.
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About

This application analyzes audio input from your microphone, displaying both the waveform and amplitude spectrum in real-time. It offers extensive customization for display, calculation, and signal generation.

✓Simultaneous waveform and spectrum display
✓Configurable display layouts
✓Selectable FFT size and averaging
✓Frequency weighting options (Flat, dBA, dBC)
✓Octave band analysis
✓Audio signal and noise generation
✓Peak hold and pitch meter
Show original description

What users say

Summarized from real user reviews of Audio / Spectrum Analyzer. Based on 1K reviews and a 4.6/5 average, it highlights the 4 positives and 4 negatives reviewers mention most about this Music app.

Positive things

  • 👍Customizable features
  • ⚙️Accurate measurements
  • 🚀Helpful for troubleshooting
  • 💡Useful for ghost hunting

Negative things

  • 🐛Crashes and freezes
  • 🔋High battery and CPU usage
  • 🚫Inappropriate ads/content
  • 🔒Security concerns with payment info
See all reviews
+1

What's New in Audio / Spectrum Analyzer

2.5.0

August 24, 2026

Added a feature that displays the frequency at the tapped position in the spectrum view.

7

In-App Purchases

$11.49

Pro (Remove ads, High-Res analysis)

Hide ads & Unlock: FFT Size 16384, Spectrum Ave 4,8.

User reviews

Most RecentHighest RatedLowest Rated

Works flawlessly! But…

…and the full paid version just needs one little tweak by the developers: if you could add one or two steps of higher resolution (32768, 65536) to get the lowest frequencies more accurate measured and displayed. Then this App could be used also to identify and locate standing waves pressure maxima more precise (higher latency due the higher sampling is not too relevant in this specific use-case).
Thank you for your work!
Show more
käsbrot mit xälzkäsbrot mit xälz

Frequency picking from spectra

Please add the ability to click on a point in the spectrum to see the frequency
sodiejxuehdsodiejxuehd

Response from developer

Thank you for your comment. In the latest version, we have added a feature that allows users to tap on the spectrum to display the frequency at that location. Please check it out.

Muito bom

Jean curtinovi
Jean CurtinoviJean Curtinovi

The best!

The best !!
i am G.Rocco TheRocki am G.Rocco TheRock

Cool

I don’t know about the other reviews from other people, but I think this is fine
ChutsiChutsi
See 92 more reviews

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User experience

🐞

Reported Bugs

3 issues

Stuck on latest measurement

Bug

White noise instead of expected functionality

Bug

Disconnects AirPods

Bug
✨

Requested Features

4 requests

Sampling rate adjustment

Feature

Wave shape tracking

Feature

Audio file analysis

Feature

Octave analysis

Feature

FAQ

What does this audio spectrum analyzer app do?

This app analyzes audio signals from your device's microphone and displays both the audio waveform and its amplitude spectrum in real-time. It uses FFT (Fast Fourier Transform) to calculate the spectrum, allowing for detailed frequency analysis.

What are the key features of this RTA app?

Key features include simultaneous waveform and spectrum display, selectable FFT sizes, spectrum averaging for smoother results, various frequency weighting options (Flat, dBA, dBC), octave band analysis, and the ability to generate sine, triangle, square, and saw waveforms, as well as white and pink noise.

Is this app free to use?

The app is free to download and use, but it does contain in-app purchases. This suggests that some advanced features or customization options may require a purchase.

What devices is this app compatible with?

The app description does not specify exact compatibility requirements, but it is designed for mobile devices. It supports both portrait and landscape orientations, indicating adaptability to different screen sizes and device types.

How can I use this app for audio analysis?

You can use this app to visualize the frequency content of any sound captured by your microphone. It's useful for tuning instruments, checking room acoustics, troubleshooting audio equipment, or simply understanding the spectral composition of sounds.