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OuterTune vs Metrolist: catalog facts
OuterTune	Metrolist
Free Free and open source under the GPL-3.0 licence.	Free Free and open source.
Android	Android
Local files and YouTube Music in one player Song downloads for offline playback	No ads during playback Offline caching of songs
Unofficial YouTube Music client that can break when the service changes Android only	Android only Unofficial client that depends on YouTube Music continuing to work with it
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0
Not stated if an account is needed	No account 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.