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Best Sound Analyzer Free Apps

249+ iOS apps curated and reviewed

4.5 avg rating
19 free apps
Updated August 2026

Out of 249+ sound analyzer free apps on iOS, 19 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Sound Analyzer Free Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Audio Spectrum Analyzer ProAudio Spectrum Analyzer ProFree4.4★ (238)NoYesAug 2026
2NIOSH Sound Level MeterNIOSH Sound Level MeterFree4.7★ (17K)NoNoAug 2026
3Decibel X:dB Sound Level MeterDecibel X:dB Sound Level MeterFree4.6★ (161K)NoYesAug 2026
4Audio Spectrum Analyzer dB RTAAudio Spectrum Analyzer dB RTAFree4.5★ (3K)NoYesAug 2026
5Audio / Spectrum AnalyzerAudio / Spectrum AnalyzerFree was $10.994.6★ (1K)YesYesAug 2026
6Acoustiblok Sound AnalyzerAcoustiblok Sound AnalyzerFree4.0★ (4)NoNoMay 2026
7N-Signal / FFT Sound AnalyzerN-Signal / FFT Sound AnalyzerFree—YesNoJul 2026
8Sound OscilloscopeSound OscilloscopeFree3.3★ (24)NoNoAug 2026

Top Picks for Sound Analyzer Free

Audio Spectrum Analyzer Pro#1

Audio Spectrum Analyzer Pro by Vlad Polyanskiy

Sound Frequency Analysis
Editor's Choice
🎵 Music
4.4😐(238 ratings)
FreeIn-App Purchases
Audio Spectrum Analyzer Pro screenshot 1
Audio Spectrum Analyzer Pro screenshot 2
Audio Spectrum Analyzer Pro screenshot 3
Audio Spectrum Analyzer Pro screenshot 4
Audio Spectrum Analyzer Pro screenshot 5

Analyze sound frequencies in real-time with this powerful tool. It offers detailed octave band analysis, FFT plots, and various measurement scales. Supports multiple microphones and noise analysis features for accurate audio insights.

What We Love

  • 👍 Intuitive and easy-to-use interface
  • 💰 Completely free with no ads
  • 🎯 Accurate frequency and spectrum analysis
  • 📊 Multiple visualization modes (FFT, spectrograph, bar display)

Room to Improve

  • 💸 Aggressive subscription/paywall nags
  • 🔄 Frequent iOS compatibility issues after updates
  • 📉 Features moved behind paywall in recent updates
NIOSH Sound Level Meter#2

NIOSH Sound Level Meter by EA LAB

Strong Contender
🔧 Utilities
4.7😊(17K ratings)
Free
NIOSH Sound Level Meter screenshot 1
NIOSH Sound Level Meter screenshot 2
NIOSH Sound Level Meter screenshot 3
NIOSH Sound Level Meter screenshot 4
NIOSH Sound Level Meter screenshot 5

This free app measures sound levels and noise exposure using your smartphone. Developed by acoustics experts, it provides professional-grade metrics and guidance on hearing protection and noise prevention.

What We Love

  • 🚀 Free and ad-free
  • 👍 Simple and intuitive interface
  • ⚖️ Accurate and reliable measurements
  • 💡 Useful for monitoring noise levels in various environments

Room to Improve

  • 🐛 Occasional bugs and crashes
  • 🔌 Issues with external microphone support
  • 🔋 Can drain battery when running for extended periods
Decibel X:dB Sound Level Meter#3

Decibel X:dB Sound Level Meter by SkyPaw Co., Limited

Frequency Spectrum Analyzer
Worth Considering
🔧 Utilities
4.6😐(161K ratings)
FreeIn-App Purchases
Decibel X:dB Sound Level Meter screenshot 1
Decibel X:dB Sound Level Meter screenshot 2
Decibel X:dB Sound Level Meter screenshot 3
Decibel X:dB Sound Level Meter screenshot 4
Decibel X:dB Sound Level Meter screenshot 5
Decibel X:dB Sound Level Meter screenshot 6

This app transforms your device into a professional sound level meter, precisely measuring ambient noise pressure. It offers advanced features like frequency analysis, historical data management, and dosimeter functions, making it useful for various applications and entertainment.

What We Love

  • ⭐ Excellent app
  • 👍 Easy to use and understand
  • 🔍 Useful for various applications
  • 🎓 Helpful for hearing protection

Room to Improve

  • 💰 Expensive subscription model
  • 🔒 Misleading free trial
  • 📢 Intrusive ads

More Sound 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

Analyze sound frequencies and decibel levels with this advanced tool. Ideal for tuning audio systems, it offers real-time spectrum analysis and sound metering for various applications.

Octave Band Real-Time AnalyzerFFT Plot - Fast Fourier TransformIntegrated Sound Level Meter (dB-A)
🎵 Music
(3K)
free with in-app purchases
5
Audio / Spectrum Analyzer
Audio / Spectrum Analyzer
Audio / Spectrum Analyzer
RTA (FFT / Spectrogram)
Free
$10.99 | 100% OFF

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 displayConfigurable display layoutsSelectable FFT size and averaging
🎵 Music
(1K)
free with in-app purchases
6
Acoustiblok Sound Analyzer
Acoustiblok Sound Analyzer
Acoustiblok Sound Analyzer
by AcoustiBlok
Free

This app provides real-time sound analysis to identify noise frequencies and generate quotes for soundproofing materials. It allows users to input room dimensions and select products for walls, floors, and ceilings, then email the information for a personalized quote.

Real-time sound analysisSound pressure meterNoise frequency identification
💼 Business
(4)
free
7
N-Signal / FFT Sound Analyzer
N-Signal / FFT Sound Analyzer
N-Signal / FFT Sound Analyzer
Audio Spectrum Analyzer
Free

Visualize sound in real-time with this audio analysis tool. It measures sound pressure levels and analyzes digital frequency levels, offering a reliable reference for sound checks and adjustments in various environments.

Real-time FFT audio spectrum analysisdB SPL sound pressure level meterDigital frequency analyzer (dBFS)
🔧 Utilities
(0)
ad-supported
8
Sound Oscilloscope
Sound Oscilloscope
Sound Oscilloscope
Sound Wave and Spectrum Viewer
Free

Visualize sound waves and analyze their frequency spectrum. This utility displays the waveform of various sounds, from your voice to musical instruments, and reveals their overtone structure. Explore the sonic characteristics of your environment with this straightforward tool.

Shows sound waveformShows sound spectrumShows sound power level
🔧 Utilities
(24)
free
9
MintFFT
MintFFT
MintFFT
Audio spectrum analyzer
Free

This application provides real-time audio spectrum analysis with clear, smooth visuals. It offers advanced features like peak hold and multiple window functions, all processed locally on your device without ads or data collection.

Real-time FFT spectrum with dB scalePeak hold and multiple window functionsPinch to zoom and swipe to pan
🎵 Music
(4)
free
10
Decibel : dB sound level meter
Decibel : dB sound level meter
Decibel : dB sound level meter
Audio noise Spectrum Analyzer
Free

Transform your device into a professional sound level meter and audio analyzer. Measure ambient noise, monitor decibel levels, and visualize sound frequencies in real time. It also offers advanced sleep tracking with sound recognition to identify disruptions.

Real-time decibel (dB) sound level monitoringIntegrated Spectrum Analyzer (FFT, spectrogram)Sleep tracking with sound recognition
🔧 Utilities
(36K)
freemium
11
Frequency Analyzer +
Frequency Analyzer +
Frequency Analyzer +
Audio analysis made easy!
Free
🔧 Utilities
(0)
12
Frequency Analyzer Spectrum
Frequency Analyzer Spectrum
Frequency Analyzer Spectrum
Audio Spectrum Analyzer Hz
Free
🌟 Lifestyle
(0)
13
Decibel Meter: Sound Analyzer
Decibel Meter: Sound Analyzer
Decibel Meter: Sound Analyzer
Noise Meter & dB Test
Free

Measure and understand ambient noise levels with this intuitive tool. It provides instant decibel readings, logs historical data with notes, and offers visual and auditory representations of sound. Ideal for ensuring safety, monitoring environments, or protecting hearing.

Instant dB readingsHistorical data loggingAdd personal notes to recordings
🔧 Utilities
(10)
free with in-app purchases
14
CreamAudio Analyzer
CreamAudio Analyzer
CreamAudio Analyzer
Pro audio measurement suite
Free
🔧 Utilities
(0)
15
Audio Tools-Db Sound & Audio
Audio Tools-Db Sound & Audio
Audio Tools-Db Sound & Audio
Audio noise Spectrum Analyzer
Free
🔧 Utilities
(0)
16
BMA Spectrum Analyzer
BMA Spectrum Analyzer
BMA Spectrum Analyzer
Real time spectrum analyzer
Free
🎵 Music
(0)
17
Spectrum Lab - Audio Analyzer
Spectrum Lab - Audio Analyzer
Spectrum Lab - Audio Analyzer
Frequency Spectrum Analyzer
Free
🎵 Music
(0)
18
mySoundAnalyzer - Decibel Tool
mySoundAnalyzer - Decibel Tool
mySoundAnalyzer - Decibel Tool
Measure Sound Noise & Loudness
Free
🔧 Utilities
(0)
19
FFT Analyzer
FFT Analyzer
FFT Analyzer
Professional FFT Analysis
$4.99
🔧 Utilities
(0)
20
Sound Analyzer - dB Meter
Sound Analyzer - dB Meter
Sound Analyzer - dB Meter
Measure noise levels instantly
Free
🔧 Utilities
(0)

FAQ about Sound Analyzer Free

What are the best sound analyzer free apps for iPhone?
Audio Spectrum Analyzer Pro tops our sound analyzer free apps ranking as of August 2026, with a 4.4-star average from 238 App Store ratings, and it's free to download.
Audio Spectrum Analyzer Pro has no ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 249+ sound analyzer free apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
This app provides powerful real-time audio analysis, allowing you to visualize sound frequencies. It includes features like an Octave Band Real Time Analyzer, FFT plots, and a sound level meter (dB meter).
Key features include Octave Band Real Time Analyzer, FFT Plot, linear and logarithm scales, up to 16384 FFT size, various window functions, max/min tracking for frequencies, and support for external microphones.