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TuneFriend vs Ultrasonic: catalog facts
TuneFriend	Ultrasonic
Free Free and open source.	Free Free and open source under the GPL-3.0.
Android, Web	Android
Works with many Subsonic-compatible servers Local library sync for fast search	Works with Navidrome, Ampache, gonic and other OpenSubsonic servers Multiple server support
Needs access to an existing music server Background playback may need battery settings changed on Android	Needs a compatible music server you run or have access to Android only
Downloadable app, Web application	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0
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.