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Itsycal vs Calendr: catalog facts
Itsycal	Calendr
Free Free download from the developer's website.	Free The open-source software is available without a license fee. Hosting, hardware and…
macOS	macOS
Uses the events already in the Mac Calendar app Extensive keyboard controls, including Vim motions	Supports quick event entry with natural-language dates.
macOS only, version 11 or later Depends on Calendar app accounts for event sync	Requires macOS calendar access for event integration.
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
No account needed	Not stated if an account is 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 22, 2026

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