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BusyCalCalendr
Paid

Costs $49.99 USD after a free 14-day trial, and is also included in Setapp.

 Free

The open-source software is available without a license fee. Hosting, hardware and…

macOS, iOS macOS
  • Works with iCloud, Google, Exchange and CalDAV
  • Highly customizable views including a Year Planner
  • Supports quick event entry with natural-language dates.
  • Apple platforms only
  • Paid after the trial
  • Requires macOS calendar access for event integration.
Downloadable app Downloadable app
Closed source Open source
License not stated License: MIT
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked September 22, 2026

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