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Sky.app vs Bluesky: catalog facts
Sky.app	Bluesky
Free Free to download from GitHub releases.	Free Free to use; the flagship app is a hosted service built on the open AT Protocol.
macOS	Android, iOS, Web
Extensive keyboard shortcuts Notification badges including unread chats	Built on an open protocol rather than one closed platform Lets users migrate their identity between providers
Unofficial client maintained by one developer Licence is not clearly identified	Most users rely on the official hosted service rather than running their own infrastructure Ecosystem of alternative apps and providers is still maturing
Downloadable app	Web application, Downloadable app
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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