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Ultrasonic vs TuneFriend: catalog facts
Ultrasonic	TuneFriend
Free Free and open source under the GPL-3.0.	Free Free and open source.
Android	Android, Web
Works with Navidrome, Ampache, gonic and other OpenSubsonic servers Multiple server support	Works with many Subsonic-compatible servers Local library sync for fast search
Needs a compatible music server you run or have access to Android only	Needs access to an existing music server Background playback may need battery settings changed on Android
Downloadable app	Downloadable app, Web application
Open source	Open source
License: GPL-3.0	License: GPL-3.0-or-later
Not stated if an account is needed	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.