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Musify vs OuterTune: catalog facts
Musify	OuterTune
Free Free, ad-free and open source under the GPL 3.0 licence.	Free Free and open source under the GPL-3.0 licence.
Android	Android
No ads Offline listening and data import/export	Local files and YouTube Music in one player Song downloads for offline playback
Android only Not available from the Google Play Store	Unofficial YouTube Music client that can break when the service changes Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0-or-later
Not stated if an account is needed	Not stated if an account is needed
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.