Compare software

Ivory vs Elk: catalog facts
Ivory	Elk
Paid Paid app with a free 7-day trial.	Free Free to use and open source.
macOS, iOS	Web
Timeline position syncs across devices Native design for iPhone, iPad and Mac	Nothing to install, runs in any modern browser Works with an account on an existing Mastodon server
Apple platforms only Paid after the trial	Mastodon focused rather than covering every fediverse platform Requires a Mastodon account
Downloadable app	Web application
Closed source	Open source
License not stated	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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