SpectralScan Audio Analyzer

Otsukare AB

In-app purchases

About this app

Turn your phone into a powerful audio analysis tool.

SpectralScan shows you what sound actually looks like. Watch frequencies dance in real-time, capture accurate measurements of speakers and rooms, or just geek out watching the spectrogram waterfall paint a picture of the soundscape around you.

REAL-TIME SPECTRUM
See audio frequencies as they happen. Dual time smoothing lines with octave smoothing show both instant peaks and averaged levels.

SWEEP MEASUREMENTS
Run a sine sweep through your speakers and capture the frequency response with precision. Unlike simple RTA, sweep measurements cut through ambient noise to reveal the true character of your audio gear. Save multiple curves and compare them side by side in pro version.

IMPULSE RESPONSE
See how your room or speakers respond over time. The impulse view shows reflections, decay, and resonances. Useful for acoustic treatment and speaker placement.

SPECTROGRAM
Watch sound unfold over time in a scrolling waterfall display. Great for visualizing music, speech patterns, or tracking down that annoying hum.

FEATURES
• dBFS scale from -160 to 0
• Log frequency axis (20 Hz - 20 kHz)
• Time and frequency smoothing
• Spectrum and impulse response plots
• Peak hold and peak frequency display
• Multiple color themes
• Works offline
• Export measurements as CSV or PNG

Built for musicians, audio engineers, acoustics nerds, HiFi enthusiasts and anyone who's ever wondered "what does that sound look like?"

Ratings and reviews

Small app, solves the problem very well, excelent options for filtering. Suits my problems as a curious engineer. It would be nice to have an "RPM" meter, a divider by 60, so it could be used to estimate engine speed.

This app did exactly what I needed. very sensitive, clear graph with plenty of settings and ability to zoom in. thank you!

Awesome, useful and intuitive tool, thank you so much for creating this and for not selling our data! <3

What’s new

More efficient spectral smoothing for smoother performance. Higher block size options added for pro version.