Spectrum Analyzer+ Audio FFT

Spectrum Analyzer+ Audio FFT

Find Peak Hz, Hum & Room Modes

5 ratings
1 review
Free
With Ads

Details

Released
March 31, 2026
Updated
November 5, 2026

Features

Spectrum Analyzer+ Audio FFT screenshot #1 for iPhone
Spectrum Analyzer+ Audio FFT screenshot #2 for iPhone
Spectrum Analyzer+ Audio FFT screenshot #3 for iPhone
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About

Analyze live audio frequencies from your device's microphone. Identify peak frequencies, hums, and room modes with detailed spectrum views and capture analysis. Compare sound changes over time and export data for further study.

✓Live frequency spectrum display
✓5-second capture and analysis
✓Peak frequency and level identification
✓Adjustable dB range
✓Comparison of sound changes
✓Specialized analysis modes (Voice, Machine, Room)
✓CSV export
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What's New in Spectrum Analyzer+ Audio FFT

1.0.35

November 5, 2026

• The first time you open Spectrum Analyzer+ after installing, the Analyzer tab comes up with less waiting, so you can tap Start and watch the live spectrum sooner. • Bars, Line, Waterfall and Spectrogram views, Capture 5 s and the Pink Noise Generator work as before. • Your saved traces, calibration and settings stay exactly as they were.

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User reviews

Awfull

Adds, especially the ones covering the entire screen are making this app utterly useless. Especially since there is usually no weay of getting rid of them other than killing the app. To make bad things worse, it was trying to give me a virus.

Response from developer

Thanks for telling us, and sorry the ads got in your way. A full-screen ad should always offer a close button after a few seconds; if one stayed stuck until you closed the app, that is a bug, not how it is meant to work. We are testing exactly that path on iPhone for the update we are preparing now.

Developer apps

FAQ

What is Spectrum Analyzer+ Audio FFT used for?

Spectrum Analyzer+ Audio FFT displays the live frequency spectrum of sounds captured by your iPhone microphone. It helps identify peak frequencies, mains hum, and room modes, and allows you to compare sound changes over time.

Does Spectrum Analyzer+ Audio FFT have ads?

Yes, Spectrum Analyzer+ Audio FFT contains advertisements. A pink noise generator feature can be unlocked for 24 hours by watching a short ad.

What are the different analysis modes in Spectrum Analyzer+ Audio FFT?

Spectrum Analyzer+ Audio FFT offers three specialized modes: Voice (80–4000 Hz) for pitch analysis, Machine (20–2000 Hz) for detecting mains hum, and Room (20–500 Hz) for analyzing low-frequency room modes.

Can I compare sound changes with Spectrum Analyzer+ Audio FFT?

Yes, you can save up to 10 captures as references. After making changes (e.g., moving a speaker), you can capture again and the app will show the average band-level difference in dB compared to the reference.

What devices is Spectrum Analyzer+ Audio FFT compatible with?

Spectrum Analyzer+ Audio FFT is supported on iPhone devices.

How accurate are the measurements from Spectrum Analyzer+ Audio FFT?

The app's measurements are relative to the microphone's full scale (dBFS). While useful for finding frequencies and comparing changes, a phone microphone is not a certified sound level meter, so numbers should not be used for compliance measurements.

Can I export data from Spectrum Analyzer+ Audio FFT?

Yes, you can export a CSV of the live spectrum or a 5-second capture. You can also share a short text summary of a capture.

What is the age rating for Spectrum Analyzer+ Audio FFT?

Spectrum Analyzer+ Audio FFT has an age rating of 17+.