Very Good Calendar Sync is a macOS app that automatically synchronises events between any two calendars available in Calendar.app, with full control over what gets shared and when, without sending data to external servers.
What is Very Good Calendar Sync?
Very Good Calendar Sync is a native macOS application that monitors your calendars and copies events from one calendar to another in real-time. It takes any calendar that appears in macOS Calendar.app (iCloud, Google, Microsoft Outlook, CalDAV) as input and produces cloned or redacted copies of those events on another calendar as output. The app runs entirely on your Mac, never transmits calendar data externally, and requires no account linking or third‑party login. It is built by an independent developer who experienced double‑booking frustrations personally.
Key Features
- Clone or redact events — Choose to copy full event details (title, description, location) or create “busy” blocks that show only the time you’re occupied, keeping sensitive information private.
- Filter by day and time — Set each sync to run only on specific weekdays (e.g., weekdays only) and within a custom time range (e.g., 9 AM–6 PM). Each synchronisation can have its own rules.
- Runs in the menu bar — The app lives in your macOS menu bar, starts automatically at login, and syncs changes in the background without requiring manual intervention.
- No middleman servers — All processing happens on your Mac. No data is collected, stored, or analysed externally. The app uses only macOS’ built‑in Calendar access.
- Works with any calendar in Calendar.app — Supports Google Calendar, Microsoft Outlook/Exchange, Apple iCloud, and any CalDAV account. No extra setup or third‑party connections required.
- Per‑user license — A single license covers all your Macs.
Who is it for?
- Consultants and freelancers — Sync client calendars to a personal calendar, automatically keeping availability up to date without exposing client details.
- Employees with multiple calendars — Bridge work and personal schedules so that personal appointments block time without sharing their content.
- Cross‑functional teams and agencies — Align internal calendars with client‑facing calendars, eliminating double‑bookings and guesswork across teams.
What can you do with Very Good Calendar Sync?
- Keep client calendars in sync — A consultant can clone work calendar events to a personal calendar, ensuring they never double‑book while keeping client titles and descriptions visible only to themselves.
- Protect personal privacy at work — Redact dentist appointments to show only “Busy” on a shared work calendar, while still blocking the time slot.
- Automate weekend and after‑hours filtering — Set a sync to run only on weekdays from 9 AM–5 PM, so personal events outside those hours never appear on a work calendar.
How does it work?
Set up in about two minutes. After downloading the app from the Mac App Store, choose two calendars from your existing macOS accounts, pick clone or redact mode, and configure day/time filters. The app runs in your menu bar and synchronises automatically whenever calendars change.
Pricing
Very Good Calendar Sync is free for one synchronisation between two calendars. Paid plans unlock unlimited synchronisations, all calendar providers, and email support: Monthly £1.99, Annual £19.99 (save over 15% vs monthly), and Lifetime £39.99. All plans are per‑user licenses covering all your Macs.
FAQ
Does the app store any of my calendar data?
Everything is stored and synced only on your device. Very Good Calendar Sync never transmits or saves your calendar data externally.
Which calendar providers are supported?
Google Calendar, Microsoft 365, Apple iCloud, CalDAV, and any account that appears in macOS Calendar.app.
