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Ultrasonic vs Youamp: catalog facts
Ultrasonic	Youamp
Free Free and open source under the GPL-3.0.	Free Free and open source under the MIT licence.
Android	Android
Works with Navidrome, Ampache, gonic and other OpenSubsonic servers Multiple server support	No trackers, ads or analytics Modern Material You interface
Needs a compatible music server you run or have access to Android only	Needs a Subsonic-compatible server to be useful Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MIT
Not stated if an account is needed	Not stated if an account is 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.