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Audio Spectrum Analyzer vs Oscilloscope: catalog facts
Audio Spectrum Analyzer	Oscilloscope
Free Free and open source under the Apache-2.0 licence, with no ads.	Free Free and open source under the GPL-3.0.
Android	Android
Logarithmic or linear frequency axis Useful for noise measurement, instrument tuning and timing sound events	Adjustable timebase from 0.1 ms to 0.5 s Single-shot trigger and storage modes
Android only Measurement accuracy depends on the phone's microphone	Limited to the device's audio input Basic interface compared with a dedicated scope
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-3.0-only
No account needed	Not stated if an account is needed
Not stated if it works offline	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.