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Bloomee vs Kopuz: catalog facts
Bloomee	Kopuz
Free Free and open source under GPL-2.0.	Free Free and open source under the EUPL-1.2, supported by sponsors.
Windows, macOS, Linux, Android, iOS, Web	Windows, macOS, Linux, Android
Plays music from multiple sources Ad-free according to its project description	Local files and many music services in one library Synced and word-timed lyrics display
Requires online music sources for streaming	Apple Music playback only works on desktop Streaming sources need accounts with those services
Downloadable app, Web application	Downloadable app
Open source	Open source
License: GPL-2.0	License: EUPL-1.2
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 1, 2026

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