Compare software

Audio Spectrum Analyzer vs PitchVis: catalog facts
Audio Spectrum Analyzer	PitchVis
Free Free and open source under the Apache-2.0 licence, with no ads.	Free Free and open source under the MIT licence.
Android	Android, Web
Logarithmic or linear frequency axis Useful for noise measurement, instrument tuning and timing sound events	Runs in the browser with nothing to install Android app available on F-Droid and Google Play
Android only Measurement accuracy depends on the phone's microphone	Web version does not stop by itself; you close the tab to end it On mobile only the microphone can be used as input
Downloadable app	Downloadable app, Web application
Open source	Open source
License: Apache-2.0	License: MIT
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.