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Seal vs YTDLnis: catalog facts
Seal	YTDLnis
Free Free and open source.	Free Free to download from its GitHub repository.
Android	Android
Uses yt-dlp, so it works with many video sites Can save audio only as well as full video	Brings yt-dlp's site support to Android Downloads both video and audio
Android only Not distributed through Google Play according to the research	Android only Depends on yt-dlp keeping up with site changes
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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