Managing multiple calendars shouldn't mean double-bookings, manual cross-checking or exposing sensitive details where they don't belong.
Very Good Calendar Sync keeps your calendars in sync while giving you full control over what information is shared. Clone events with all their details, or redact them to show only your availability. It runs quietly in your menu bar, entirely on your device, with no third-party accounts or cloud services involved.
It's built for anyone juggling more than one calendar:

Your data never leaves your Mac. There are no servers, no data collection, no account linking. Your calendar is one of the most detailed records of your daily life, and your clients and colleagues never agreed to have their information routed through yet another service. That's why on-device sync matters.
Very Good Calendar Sync works with Google Calendar, Microsoft 365, Apple iCloud, CalDAV and anything else you can add to macOS' Calendar.app. You can filter syncs by specific days and time ranges so only the events that matter get copied across.
It's a small, focused tool that does one thing well: keeping your calendars aligned without compromising your privacy. Because good software doesn't need to know everything about you to be useful.
Go and take a closer look over at verygoodcalendarsync.com!