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