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Nocturne vs Aonsoku: catalog facts
Nocturne	Aonsoku
Free Free and open source under the GPL-3.0-or-later.	Free Free and open source under the MIT licence.
Linux	Linux
Automatic synced lyrics Caching keeps large libraries responsive	Works with Navidrome and other Subsonic-compatible servers Desktop app instead of a browser tab
Built around Navidrome as the library backend Linux only	Needs a Navidrome or Subsonic server to connect to The homepage offers almost no documentation
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.