FFT app icon

Apps Like FFT for iPhone and iPad

Analyze audio and display frequency graphs

Analyzes audio using Fast Fourier Transform to display amplitude vs. frequency graphs. Displays detailed spectral analysis in octaves. Supports iOS microphone or external microphones for accurate measurements.

by Andrew Smith★ 4.06 ratingsMusic$10.99Data updated 2026-09-08

FFT screenshots

Ranked alternatives

Showing 1–20 of 1,000 ranked alternatives.

  1. AudioTools, dB, Sound & Audio app icon

    AudioTools, dB, Sound & Audio

    Andrew Smith

    Record , analyze , test speakers

    AudioTools offers SPL measurement, RTA analysis, FFT visualization, and speaker polarity testing. Includes a generator, scope, CLF viewer, and recorder. Allows adding optional modules for advanced acoustic analysis and customization.

    ★ 4.85,084 ratingsMusic$19.99Data updated 2026-10-14
  2. bismark bs-spectrum app icon

    bismark bs-spectrum

    bismark LLC

    Real-time audio spectrum analyzer with FFT.

    The app analyzes audio input in real-time using FFT. It displays the frequency spectrum with options for graph scale, FFT window, decay time, and amplitude offset.

    ★ 3.02 ratingsMusic$3.99Data updated 2026-09-11
  3. Audio / Spectrum Analyzer app icon

    Audio / Spectrum Analyzer

    Loop-Sessions.LLC.

    Analyze and display waveform

    Real-time analysis displays waveform and amplitude simultaneously. Users can switch between portrait and landscape modes. Options to configure waveform and display. Adjustable FFT size and window function for precise frequency analysis.

    ★ 4.61,048 ratingsMusicFreeData updated 2026-09-24
  1. RTA app icon

    RTA

    Andrew Smith

    Real time audio frequency analyzer.

    The app provides acoustical analysis for iOS devices. It offers octave and 1/3 octave modes with selectable decay times, Peak Hold, and true linear Average mode.

    ★ 4.026 ratingsMusic$4.99Data updated 2026-10-12
  2. Decibel Meter Sound Detector app icon

    Decibel Meter Sound Detector

    Ashraf Thoppukadavil

    Track noise levels in real time

    Measure levels in decibels using the device’s microphone. Display real-time audio frequency and dB readings. Apply filters for specific frequency and dB ranges. Share measurements via Messages, Email, WhatsApp, Notes, and other apps.

    ★ 4.754,929 ratingsProductivityFreeData updated 2026-09-13
  3. RTA Audio app icon

    RTA Audio

    New Ball s.r.o.

    Record and analyze frequencies in real time

    Realtime analyzer processes live input with Fast Fourier Transform and window functions. Record for offline analysis. Visualizer module displays frequency data from recorded files. Export analysis results and files.

    ★ 3.631 ratingsMusicFreeData updated 2026-09-08
  4. Decibel X:dB Sound Level Meter app icon

    Decibel X:dB Sound Level Meter

    SkyPaw Co., Limited

    Measure sound pressure levels precisely and easily.

    The app transforms an iOS device into a sound level meter, measuring sound pressure levels. It offers features like Apple Watch support, Health app integration, and frequency analysis tools.

    ★ 4.6161,639 ratingsUtilitiesFreeData updated 2026-09-21
  5. AUDIIO - RTA Analyzer app icon

    AUDIIO - RTA Analyzer

    BetaMatters Limited

    Analyze audio in real time

    Analyze audio in real time with RTA bar and line graphs, FFT, and spectrogram views. Display peak and current dB levels. Choose linear or logarithmic scales. Adjust octave settings and access a sleek, functional interface.

    ★ 4.395 ratingsMusicFreeData updated 2026-09-18
  6. dB meter - noise measure app icon

    dB meter - noise measure

    Anna Koynova

    Sound levels and graph histograms

    Sound levels with SPL metrics including current average, peak, average maximum, and absolute maximum. Display graph histograms for level changes. Save measurements and reset maximum values by tapping. Support upside down orientation for easy use.

    ★ 4.6641 ratingsUtilities$2.99Data updated 2026-09-11
  7. Audio Spectrum Analyzer app icon

    Audio Spectrum Analyzer

    Black Cat Systems

    Audio frequencies displayed for analysis.

    The app displays audio frequencies up to 20 kHz on an iPad, iPhone, or iPod Touch. Users can adjust frequency span, FFT size, and apply filtering for smoothing.

    ★ 3.952 ratingsUtilities$3.99Data updated 2026-09-14
  8. dB meter lite - noise measure app icon

    dB meter lite - noise measure

    Anna Koynova

    Sound levels and create histograms

    Sound levels with SPL metrics including current average, peak, average maximum, and absolute maximum. Display graph histograms for adjustable settings. Save measurements and reset max values by tapping. Support upside down orientation for easy use.

    ★ 4.6346 ratingsUtilitiesFreeData updated 2026-09-11
  9. Audio Spectrum Analyzer dB RTA app icon

    Audio Spectrum Analyzer dB RTA

    Marina Polyanskaya

    Analyze and visualize frequencies

    Analyze frequencies with a real-time display. Adjust and visualize sound levels across different frequency ranges. Export analysis data and compare signals for accuracy. Calibrate equipment for optimal performance.

    ★ 4.53,039 ratingsMusicFreeData updated 2026-09-13
  10. Analyzer app icon

    Analyzer

    DSP Mobile UG (haftungsbeschraenkt)

    Sound pressure level and frequency analyzer.

    The app offers sound pressure level (SPL) measurement with industry standard response times and weighting functions. It also provides a real-time audio analyzer with selectable bandwidths and FFT block sizes.

    ★ 2.911 ratingsMusic$14.99Data updated 2026-09-21
  11. Audio Function Generator app icon

    Audio Function Generator

    Thomas Gruber

    Generate tones, adjust frequencies, save presets

    Nd play test tones including sine, rectangular, triangular, and sawtooth waves. Create and play frequency sweep tones in ascending and descending directions. Adjust frequency, amplitude, and duration settings.

    ★ 4.72,194 ratingsUtilitiesFreeData updated 2026-09-08

How we rank alternatives

Apps are ranked by functional similarity, category fit, rating confidence, and popularity.