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Fladder vs Moonfin: catalog facts
Fladder	Moonfin
Free Free and open source under the GPL-3.0.	Free Described as open source; no pricing is stated in the research.
Linux	macOS, Android
Dedicated app for Jellyfin libraries Single Flutter codebase aimed at several platforms	Works with both Jellyfin and Emby Combines libraries from several servers
Requires a Jellyfin server to be useful Little documentation in the research about features	Needs an existing Jellyfin or Emby server Licence not stated in the research
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License not stated
Account needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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