Best Fft Analyzer Apps

209+ iOS apps curated and reviewed

4.0 avg rating
12 free apps
Updated June 2026

The best fft analyzer apps on iPhone average 4.0★ across 209+ titles — we've ranked them by what real users actually keep on their phones. Updated June 2026.

Top Picks for Fft Analyzer

Audio / Spectrum Analyzer#1

Audio / Spectrum Analyzer by Loop-Sessions.LLC.

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

  • 👍 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
Decibel X:dB Sound Level Meter#3

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

Frequency Spectrum Analyzer
Worth Considering
🔧 Utilities
4.7😐(156K 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

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.

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 Fft Analyzer apps to explore

4
FFTWave
FFTWave
FFTWave
by Eisaku Nozu
Free

This app visualizes sound waves and spectra in real-time using your device's microphone, allowing you to analyze frequency characteristics and detect peaks. With features like pinch zoom and peak hold, it helps with sound adjustments and howling analysis, giving you a powerful tool to fine-tune your audio.

🔧 Utilities
(15)
5
FNam FFT Spectrogram Analyzer
FNam FFT Spectrogram Analyzer
FNam FFT Spectrogram Analyzer
by YEON SEOB KIM
Free
🔧 Utilities
(0)
6
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.

🔧 Utilities
(36K)
7
Spectrum Analyzer+ FFT
Spectrum Analyzer+ FFT
Spectrum Analyzer+ FFT
Audio Frequency Viewer
Free
🔧 Utilities
(3)
8
N-Signal / FFT Sound Analyzer
N-Signal / FFT Sound Analyzer
N-Signal / FFT Sound Analyzer
Audio Spectrum Analyzer
Free
🔧 Utilities
(0)
9
FFT Plot
FFT Plot
FFT Plot
Sound Frequency Analyzer RTA
$9.99

Powerful real-time audio analysis app designed for musicians and sound enthusiasts. Features include customizable FFT size, peak frequency detection, various window functions, and adjustable scales for precise audio measurement and visualization. Ideal for room and speaker tuning. Fine-tune sound with FFT Plot today!

🎵 Music
(87)
10
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)
11
SignalScope X
SignalScope X
SignalScope X
Dynamic Signal Analysis Tools
Free

An advanced signal analysis application offering tools for acoustics, audio, electronics, and more. Analyze signals, calibrate devices, and access a range of measurement tools. Subscribe for basic, advanced, or professional features compatible with iPhone, iPad, and Mac. Subscription details and privacy policy available on the website.

🔧 Utilities
(21)
12
Spectrum Lab - Audio Analyzer
Spectrum Lab - Audio Analyzer
Spectrum Lab - Audio Analyzer
Frequency Spectrum Analyzer
Free
🎵 Music
(0)
13
FFT Analyzer
FFT Analyzer
FFT Analyzer
Professional FFT Analysis
$1.99
🔧 Utilities
(0)
14
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.

🔧 Utilities
(97)
15
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)
16
e-scope 3-in-1
e-scope 3-in-1
e-scope 3-in-1
Oscilloscope+FFT+Signal Gen.
$1.99

This multifunctional tool combines an oscilloscope, FFT analyzer, and signal generator, allowing users to observe and analyze audio signals in various ways. With its user-friendly interface, you can effortlessly switch between modes, capture waveforms, and even generate signals to test and measure audio devices.

🎵 Music
(1)
17
Spectrum Analyzer RTA
Spectrum Analyzer RTA
Spectrum Analyzer RTA
Sound Frequency Analyzer
$19.99
🎵 Music
(67)
18
Spectrum AUv3 FFT Visualizer
Spectrum AUv3 FFT Visualizer
Spectrum AUv3 FFT Visualizer
Real-time FFT Analyzer
$4.99
🎵 Music
(0)
19
Analyzer
Analyzer
Analyzer
by DSP Mobile
$14.99

This application is a sound analysis tool that combines a sound pressure level meter and a frequency analyzer, designed for audio professionals and anyone needing to evaluate sound environments. It offers advanced features such as customizable settings, data storage and export, and compatibility with external microphones and audio hardware, making it perfect for measuring and analyzing sound in various settings - try it out to discover its full potential!

🎵 Music
(11)
20
FFT
FFT
FFT
by Andrew Smith
$10.99

This high-resolution audio analysis tool uses the Fast Fourier Transform to display detailed graphs of amplitude vs. frequency, suitable for acoustical analysis and professional use. With various controls and features, including a signal generator, cursor readout, and data export options, users can analyze and visualize audio data with precision and flexibility.

🎵 Music
(6)