Spectrum Analyzer - Audio FFT
Real-time spectrum analyzer
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Free
In-App Purchases
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About
Spectrum Analyzer – Audio FFT transforms your iPhone microphone into a real-time live audio spectrum workspace from 20 Hz to 20 kHz. Using Fast Fourier Transform (FFT) processing, it displays a log-scale frequency graph, live input sound meter, and a peak-frequency readout to pinpoint dominant tones. Easily freeze the display to inspect static audio data. Ideal for musicians, engineers, and students, core features are free, with an optional one-time Pro upgrade for higher FFT resolution.
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What's New in Spectrum Analyzer
1.1.0
August 26, 2026
What's New in This Version • Clearer Help tips and #FF3131 accent styling • Requires iOS 17.6 or later • iPhone and iPad only (Mac and Apple Vision support removed)
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In-App Purchases
$1.99
Spectrum Analyzer - Audio FFT
Real-time spectrum analyzer, audio FFT, and sound meter