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OuterTune vs N-Zik: catalog facts
OuterTune	N-Zik
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0 licence.
Android	Android
Local files and YouTube Music in one player Song downloads for offline playback	Lyrics that can be synced, edited and translated Offline caching and permanent downloads
Unofficial YouTube Music client that can break when the service changes Android only	Described by its developer as a side project Depends on YouTube Music, which can break unofficial clients
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0-only
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.