Best Fft Audio Apps

232+ iOS apps curated and reviewed

4.3 avg rating
16 free apps
Updated June 2026

From beginner-friendly picks to power-user tools, our fft audio list covers 232+ iPhone apps updated through June 2026. Compare ratings, prices, and screenshots in one place.

Top Picks for Fft Audio

Audio / Spectrum Analyzer#1

Audio / Spectrum Analyzer by Loop-Sessions.LLC.

RTA (FFT / Octave Analysis)
Editor's Choice
🎵 Music
4.5😐(129 ratings)
FreeAdsIn-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 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.

What We Love

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

Room to Improve

  • 🐛 Crashes and freezes
  • 🔋 High battery and CPU usage
  • 🚫 Inappropriate ads/content
RTA Audio#2

RTA Audio by New Ball s.r.o.

Strong Contender
🎵 Music
3.6(31 ratings)
FreeIn-App Purchases
RTA Audio screenshot 1
RTA Audio screenshot 2
RTA Audio screenshot 3
RTA Audio screenshot 4
RTA Audio screenshot 5

Analyze audio in real-time with detailed frequency spectrum and waveform visualizations. Record and export your audio analysis results, including spectrograms and frequency tables, for sharing or archiving.

Audio Spectrum Analyzer dB RTA#3

Audio Spectrum Analyzer dB RTA by Marina Polyanskaya

Sound frequency, decibel meter
Worth Considering
🎵 Music
4.5😐(3K ratings)
FreeIn-App Purchases
Audio Spectrum Analyzer dB RTA screenshot 1
Audio Spectrum Analyzer dB RTA screenshot 2
Audio Spectrum Analyzer dB RTA screenshot 3

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.

What We Love

  • 🚀 Excellent audio analysis tool
  • 👍 Clean and intuitive interface
  • 💡 Customizable frequency range
  • 🔍 Accurate real-time spectrum visualization

Room to Improve

  • 🐛 Compatibility issues with newer iOS versions
  • 🔁 Constant prompts to upgrade to Pro version
  • 🔌 High battery consumption

More Fft Audio apps to explore

4
Audio Spectrum Analyzer Pro
Audio Spectrum Analyzer Pro
Audio Spectrum Analyzer Pro
Sound Frequency Analysis
Free

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.

Octave Band Real Time AnalyzerFFT Plot (Fast Fourier Transform)Sound level meter (dB meter)
🎵 Music
(236)
free with in-app purchases
5
Decibel X:dB Sound Level Meter
Decibel X:dB Sound Level Meter
Decibel X:dB Sound Level Meter
Frequency Spectrum Analyzer
Free

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.

Precise sound pressure level measurementFrequency spectrum analysis (FFT, BAR graphs)Historical data recording and export
🔧 Utilities
(156K)
free with in-app purchases
6
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
7
AudioTools, dB, Sound & Audio
AudioTools, dB, Sound & Audio
AudioTools, dB, Sound & Audio
RTA, Acoustics Measurement SPL
$19.99

This professional audio analysis app offers a comprehensive suite of tools for acoustic measurements, including SPL, RTA, and FFT. It calibrates device microphones for accurate results and allows for the addition of powerful optional modules for advanced analysis.

SPL Meter with A/C weightingReal Time Analyzer (RTA)Fast Fourier Transform (FFT) analysis
🎵 Music
(5K)
free with in-app purchases
8
MintFFT
MintFFT
MintFFT
Audio spectrum analyzer
Free
🎵 Music
(0)
9
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
10
Audio spectrum analyzer EQ Rta
Audio spectrum analyzer EQ Rta
Audio spectrum analyzer EQ Rta
Sound frequency, decibel meter
$3.99

This app provides real-time audio analysis and visualization for sound frequency and decibel levels. It's designed for precise audio measurement, suitable for both hobbyists and professionals tuning rooms or speakers.

Octave Band Real-Time AnalyzerFFT PlotSmooth HD Graphics
📊 Productivity
(245)
free
11
FFT Plot
FFT Plot
FFT Plot
Sound Frequency Analyzer RTA
$9.99

This real-time audio analysis app provides precision sound measurement and visualization. It's ideal for detecting sound issues, room tuning, and speaker calibration, offering detailed frequency analysis for musicians and audio professionals.

Real-time audio analysisFrequency detectionAveraging options
🎵 Music
(87)
free
12
Audio Kit
Audio Kit
Audio Kit
Audio Testing App
$2.99

This app provides four essential audio analysis tools: a real-time spectrum analyzer, a waveform scope, an SPL meter, and a signal generator. It helps audio professionals visualize and measure sound characteristics with detailed controls and calibration options.

Real-time Spectrum AnalyzerWaveform ScopeSPL Meter with A-weighting
🎵 Music
(6)
free with in-app purchases
13
Spectrum Analyzer+ FFT
Spectrum Analyzer+ FFT
Spectrum Analyzer+ FFT
Audio Frequency Viewer
Free

This utility transforms your device into a real-time audio frequency analyzer. It visualizes sound frequencies from 20 Hz to 20 kHz using the microphone, displaying amplitude and peak frequencies. It's designed for musicians, audio engineers, and sound enthusiasts.

Real-time FFT audio spectrum visualizationFrequency range 20 Hz to 20 kHzPeak frequency detection
🔧 Utilities
(3)
ad-supported
14
ByeNoise - Video Audio Editor
ByeNoise - Video Audio Editor
ByeNoise - Video Audio Editor
Noise Reducer, Audio Recorder
Free

This app cleans unwanted background noise from audio and video files using AI. It also offers editing tools like trimming, volume boosting, voice changing, and subtitle embedding. An integrated recorder captures crystal-clear audio with noise reduction.

AI noise reduction for audio/videoTrim, cut, and edit audioVolume booster and equalizer
📷 Photo & Video
(2K)
free with in-app purchases
15
Frequency Counter+ Hz FFT
Frequency Counter+ Hz FFT
Frequency Counter+ Hz FFT
Audio Tone & Sound Analyzer
Free

This app transforms your iPhone into a powerful audio analyzer. It offers four distinct modes to measure sound frequencies, tune instruments, analyze motor speeds, and check mains stability. Advanced features include measurement history, comparison tools, and CSV export.

Dominant frequency measurement (Hz)Instrument tuning with note and pitch displayMotor RPM analysis
🔧 Utilities
(3)
ad-supported
16
Hokusai Audio Editor
Hokusai Audio Editor
Hokusai Audio Editor
by Wooji Juice Ltd
Free

This multitrack audio editor allows you to record or import audio, then perform detailed edits like cutting, copying, and pasting. It offers a suite of filters and special effects, with advanced features available through in-app purchases. Mix multiple tracks and export your creations in various formats.

Multitrack editingCut, copy, paste, delete audioFilters and special effects
🎵 Music
(414)
free with in-app purchases
17
SoundLab - Audio Editor
SoundLab - Audio Editor
SoundLab - Audio Editor
audacity, mixer, music studio.
Free

This app provides desktop-grade audio editing tools on your mobile device. It features a multi-track editor with numerous effects, an AI vocal separator, and a robust audio recorder. It's designed for music and podcast creators needing a convenient, on-the-go solution.

16-track audio editorOver 20 audio effectsAI Vocal Separator
🎵 Music
(13K)
free with in-app purchases
18
Audio Recorder: Play & Cleaner
Audio Recorder: Play & Cleaner
Audio Recorder: Play & Cleaner
Audio Recorder, HD Recording
Free

Capture, edit, and schedule audio with this comprehensive recording studio. Features include unlimited recording length, precise trimming, silence detection, and cloud storage options. Schedule reminders for recordings and playback to stay organized.

Unlimited recording lengthAuto-resume after interruptionsSilence detection with auto-pause
💼 Business
(1.4K)
free with in-app purchases
19
Airfoil Satellite
Airfoil Satellite
Airfoil Satellite
Stream audio to your device
Free

This application transforms your device into an audio receiver, allowing you to stream audio from any Mac application or web source. Enjoy your music and podcasts wirelessly throughout your home by connecting your device to your local Wi-Fi network.

Audio receiver for iOS devicesStream from any Mac appSupports web-based audio sources
🎵 Music
(32)
free
20
SpectralScan Audio Analyzer
SpectralScan Audio Analyzer
SpectralScan Audio Analyzer
by Otsukare AB
Free

Transform your device into a professional audio analysis tool. Visualize sound in real-time with a high-resolution spectrum, perform precise sine sweep measurements, and analyze frequency content over time. Save, compare, and export your audio data.

Real-time frequency spectrum visualizationSine sweep measurements for system responseSpectrogram for time-frequency analysis
🔧 Utilities
(3)
free with in-app purchases