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Supersonic vs Amperfy: catalog facts
Supersonic	Amperfy
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Free to use; the developer accepts donations.
Windows, macOS, Linux	macOS, iOS
Provides a native desktop interface with gapless playback.	Native app for iPhone, iPad and Mac Works with Ampache and Subsonic servers
Requires access to a supported music server.	Requires your own Ampache or Subsonic server No Android or Windows version
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
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 September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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