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Metrolist vs OuterTune: catalog facts
Metrolist	OuterTune
Free Free and open source.	Free Free and open source under the GPL-3.0 licence.
Android	Android
No ads during playback Offline caching of songs	Local files and YouTube Music in one player Song downloads for offline playback
Android only Unofficial client that depends on YouTube Music continuing to work with it	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	License: GPL-3.0-or-later
No account 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.