Best Audio Spectrum Analyzer Free Apps

211+ iOS apps curated and reviewed

4.4 avg rating
14 free apps
Updated May 2026

With an average user rating of 4.4β˜…, the audio spectrum analyzer free category is one of the App Store's strongest. Browse all 211+ apps we track, sorted so the most loved ones surface first.

Top Picks for Audio Spectrum Analyzer Free

Audio / Spectrum Analyzer#1

Audio / Spectrum Analyzer by Loop-Sessions.LLC.

RTA (FFT / Octave Analysis)
Editor's Choice
🎡 Music
4.9😐(72 ratings)
$10.99AdsIn-App Purchases
Audio / Spectrum Analyzer screenshot 1
Audio / Spectrum Analyzer screenshot 2
Audio / Spectrum Analyzer screenshot 3
Audio / Spectrum Analyzer screenshot 4
Audio / Spectrum Analyzer screenshot 5
Audio / Spectrum Analyzer screenshot 6

This app is a versatile Audio/Spectrum Analyzer that allows users to view and analyze audio waveforms and amplitude spectrums from microphone input. It offers customization options for display settings, FFT size, window functions, waveform generation, and noise signal generation. Additionally, it supports Bluetooth connection policies and offers an option to hide advertisements through an in-app purchase. For a more advanced multi-channel audio signal experience, users can try out the "Multi Wave Oscillator" linked within the app's settings.

What We Love

  • πŸ‘ Customizable features
  • βš™οΈ Accurate measurements
  • πŸš€ Helpful for troubleshooting
  • πŸ’‘ Useful for ghost hunting

Room to Improve

  • πŸ› Crashes and freezes
  • πŸ”‹ High battery and CPU usage
  • 🚫 Inappropriate ads/content
SpectrumView#3

SpectrumView by Oxford Wave Research Ltd.

Worth Considering
πŸ“š Education
3.1😐(70 ratings)
FreeIn-App Purchases
SpectrumView screenshot 1
SpectrumView screenshot 2
SpectrumView screenshot 3
SpectrumView screenshot 4
SpectrumView screenshot 5
SpectrumView screenshot 6

Visualize frequencies in real-time with SpectrumView, an audio companion for iOS devices. Measure tones, analyze sounds, record audio, and access various tools for detailed frequency analysis, all in one app. Explore SpectrumView today for a new level of audio visualization and manipulation.

What We Love

  • πŸ‘ Accurate and reliable spectrogram visualization
  • 🎯 Highly configurable FFT and sampling settings
  • 🎨 Beautiful and intuitive user interface
  • πŸ“Š Excellent for analyzing speech, music, and animal sounds

Room to Improve

  • πŸ’° Aggressive in-app purchase model for basic features
  • πŸ” Unexplained location permission requests
  • πŸ“‰ Linear frequency scale wastes screen space

More Audio Spectrum Analyzer Free apps to explore

4
Audio Spectrum Analyzer dB RTA
Audio Spectrum Analyzer dB RTA
Audio Spectrum Analyzer dB RTA
Sound frequency, decibel meter
Free

An advanced audio analysis app with features like real-time spectrum analysis, sound meter, and FFT plot for tuning home cinema, car stereo, and more. Experience precise frequency breakdowns and harmonic analysis with smooth HD graphics. Contact support for questions or feedback.

🎡 Music
(3K)
5
Audio Spectrum Analyzer Pro
Audio Spectrum Analyzer Pro
Audio Spectrum Analyzer Pro
Sound Frequency Analysis
Free

This app is a powerful real-time audio analysis tool with features like FFT plot, octave band real-time analyzer, and various measurement functions. It offers precise measurements using device-integrated microphones, AirPods support, and external microphone compatibility. Explore more features and functionalities by checking out the app!

🎡 Music
(236)
6
Spectrum Analyzer: Spectrogram
Spectrum Analyzer: Spectrogram
Spectrum Analyzer: Spectrogram
Audio frequency visualizer
Free

Experience real-time sound analysis with a professional Spectrum Analyzer app that includes a sound level meter, multichannel harmonic analysis, adjustable graphics, and an AI-powered sound source analyzer. Enhance your understanding of your sound environment with detailed graphical representations and precise measurements. Check it out now!

🎡 Music
(188)
7
Audio Spectrum Analyzer
Audio Spectrum Analyzer
Audio Spectrum Analyzer
by Black Cat Systems
$3.99

This application transforms your device into an audio spectrum analyzer, displaying frequencies up to 20 kHz and allowing you to control the frequency span, FFT size, and display settings. With various features such as filtering, peak hold, and customizable display options, you can analyze and visualize audio spectra with precision, and even save screenshots for reference.

πŸ”§ Utilities
(52)
8
Audio spectrum analyzer EQ Rta
Audio spectrum analyzer EQ Rta
Audio spectrum analyzer EQ Rta
Sound frequency, decibel meter
$3.99

An advanced real-time audio analysis app with features like Octave Band Real-Time Analyzer, FFT Plot, and Multispectral Harmonic Analyzer. Ideal for room and speaker tuning, this app provides detailed audio measurement and visualization. Contact for more information at lspappscare@gmail.com.

πŸ“Š Productivity
(245)
9
Decibel : dB sound level meter
Decibel : dB sound level meter
Decibel : dB sound level meter
Audio noise Spectrum Analyzer
Free

An advanced sound level meter app with a built-in Spectrum Analyzer for precise measurements. Monitor noise levels, save measurements, export data, and protect your hearing using various features. Download now for accurate sound monitoring and protection.

πŸ”§ Utilities
(36K)
10
Sound Spectrum Analysis
Sound Spectrum Analysis
Sound Spectrum Analysis
Audio Frequency Analyzer (RTA)
Free

This application analyzes sound spectra in real-time using a microphone, offering features such as FFT, linear and logarithmic scales, and various window functions. It can be used to measure noise levels, detect peak frequencies, and export data, making it a useful tool for sound analysis and measurement.

πŸ”§ Utilities
(41)
11
Frequency Analyzer
Frequency Analyzer
Frequency Analyzer
Audio Spectrum, Spectroid, dB
Free

Transform your device into a professional-grade audio analysis suite with industry-leading processing, precision calibration tools, and comprehensive visualization capabilities. Download now and unlock the full spectrum of acoustic measurement capabilities for applications such as acoustic measurement, audio engineering, environmental noise consulting, and more.

πŸ”§ Utilities
(97)
12
Spectrum Analyzer RTA
Spectrum Analyzer RTA
Spectrum Analyzer RTA
Sound Frequency Analyzer
$19.99
🎡 Music
(67)
13
Decibel X PRO: dBA Noise Meter
Decibel X PRO: dBA Noise Meter
Decibel X PRO: dBA Noise Meter
Frequency Spectrum Analyzer
$69.99

Transform your iOS device into a professional sound level meter with our leading noise meter app. Measure sound pressure levels accurately and protect your hearing, whether you're an audio expert or simply curious about your surroundings. See noise levels on your Apple Watch, export data to the Health app, and enjoy features like frequency analysis and dosimeter readings.

πŸ”§ Utilities
(6.9K)
14
MintFFT
MintFFT
MintFFT
Audio spectrum analyzer
Free
🎡 Music
(0)
15
dB Meter & Spectrum Analyzer
dB Meter & Spectrum Analyzer
dB Meter & Spectrum Analyzer
Noise & sound level decibel
$29.99

A sound level measuring app that provides real-time decibel readings, identifies noise levels in the environment, and offers features for monitoring and managing sound levels. Download now to protect your hearing and maintain a healthy environment around you.

πŸ”§ Utilities
(858)
16
DecibelΓ­metro Ultra
DecibelΓ­metro Ultra
DecibelΓ­metro Ultra
Noise Level Frequency Analyzer
Free

Measure the sound levels around you accurately with our Decibel Meter Ultra app. Stay informed and protect your hearing by monitoring noise levels in real-time. Download now for a quieter and safer environment.

πŸ”§ Utilities
(272)
17
Tone Generator: Audio Sound Hz
Tone Generator: Audio Sound Hz
Tone Generator: Audio Sound Hz
Generate Audio Frequency Waves
Free

Generate pure sine wave tones at various frequencies for purposes like tuning instruments, hearing tests, and audio equipment testing. Easily adjust frequencies, volume, and output options with user-friendly controls. Created by audio experts at TMSOFT. Explore more apps at http://www.tmsoft.com/.

🎡 Music
(128)
18
Spectre Analyzer for Logic Pro
Spectre Analyzer for Logic Pro
Spectre Analyzer for Logic Pro
Auv3 Plugin for iOS and macOS
Free

This audio plugin visualizes your audio in real-time using high-resolution FFT technology, providing a precise rendering of audio frequencies. Compatible with various host apps, it leverages GPU rendering to minimize CPU usage, allowing for seamless audio processing.

🎡 Music
(3)
19
Decibel X:dB Sound Level Meter
Decibel X:dB Sound Level Meter
Decibel X:dB Sound Level Meter
Frequency Spectrum Analyzer
Free

Transform your iOS device into a professional sound level meter with pre-calibrated accuracy and various frequency spectrum analysis tools. Measure sound pressure levels, export data to Health app, and enjoy features like FFT graphs, dosimeter readings, and InstaDecibel for social sharing. Experience the convenience of tracking noise levels with precision and ease.

πŸ”§ Utilities
(156K)
20
Oscilyzer
Oscilyzer
Oscilyzer
Audio analyzer and generator
Free

This audio analysis and generation tool combines an oscilloscope, spectrum analyzer, and synthesizer, allowing users to visualize and manipulate audio signals in real-time. With various operating modes and settings, users can analyze and generate audio frequencies, and even transfer dominant frequencies between modes to create and customize sounds.

πŸ“Š Productivity
(8)