Very Good Calendar Sync

Very Good Calendar Sync is a privacy-first macOS application that solves the universal problem of keeping multiple calendars aligned without compromising sensitive data. It runs entirely on your Mac, using native macOS Calendar.app integration to synchronize work, personal, and client calendars automatically. The core value proposition is simple: set it up once, and it quietly works in the background, monitoring your calendars and syncing any changes as they happen. A new meeting on your work calendar appears on your personal calendar instantly, without any manual effort.

This product is built for consultants managing multiple client calendars, employees balancing work and personal schedules, freelancers juggling projects, and teams who need real-time availability across different calendar systems. The key differentiator is absolute privacy: your calendar data never leaves your Mac. There are no accounts to link, no credentials to share with third parties, and no cloud storage involved. The app uses your Mac's native calendar access, meaning Google, Microsoft, and Apple credentials stay secure under macOS' Internet Accounts system.

Very Good Calendar Sync gives you granular control over what gets synchronized. You can choose specific weekdays, set daily hours, define a start date for synchronization, and decide whether to share full event details or just your busy time. This flexibility ensures you share your availability without sharing your life. The app runs quietly in your menu bar, stays out of your way, and supports all calendars that appear in macOS Calendar.app, including Google Calendar, Microsoft Outlook/Exchange, Apple iCloud, and any CalDAV account. It is built by someone who got tired of double-bookings and third-party apps wanting access to their entire calendar life.

Clone or Redact Event Details

Share your availability without sharing your personal life. When synchronizing events, you have full control over what information is visible. You can clone events with all details, including title, description, and location, or redact them to show only that you are busy. This feature is critical for professionals who need to show clients or colleagues when they are available without exposing meeting topics, attendee names, or confidential notes. Your private calendar data stays private while your public calendar stays accurate and professional.

Filter by Day and Time

Every synchronization gets its own set of rules. You can synchronize only weekdays, only weekends, or pick specific days of the week. Set a precise time range to limit syncing to work hours, for example, 9 AM to 6 PM only. You can also define a start date for when synchronization begins. This level of granularity ensures that your personal time remains personal, and your work calendar only shows relevant availability. No more weekend meetings leaking into your personal schedule or late-night work events disturbing your family calendar.

Stays Out of the Way

Very Good Calendar Sync runs quietly in your macOS menu bar. You set up your syncs once, then forget about it. The app automatically synchronizes whenever your calendars change, monitoring updates in the background without requiring any manual intervention. There are no pop-ups, no reminders, and no configuration needed after initial setup. It is designed for busy professionals who need their tools to work seamlessly without adding cognitive overhead or interrupting their workflow.

No Accounts to Link and No Middleman

Your Google, Microsoft, and Apple credentials stay completely safe under macOS' Internet Accounts system. There are no logins on third-party websites, no accounts to create, and no passwords to share. The app runs entirely on your Mac with no servers of its own, no data collection, and no analytics on your calendar. It is just your Mac talking directly to your calendars. This architecture eliminates the most common security vulnerabilities in calendar synchronization tools and ensures your data never touches an external server.

Consultants Managing Multiple Client Calendars

Consultants often maintain separate calendars for each client to keep engagements organized and confidential. Manually cross-checking availability across these calendars leads to double-bookings and scheduling chaos. Very Good Calendar Sync automatically aligns all client calendars, ensuring that when a meeting is booked in one client's calendar, it appears as busy time in all others. The redact feature allows consultants to show only availability without revealing client names or meeting topics, maintaining professional confidentiality while preventing scheduling conflicts.

Employees Balancing Work and Personal Schedules

Professionals with separate work and personal calendars constantly face the challenge of keeping both accurate. A dentist appointment booked on your personal calendar needs to appear as busy time on your work calendar to prevent colleagues from scheduling meetings. Very Good Calendar Sync handles this automatically. Set up the synchronization once, and your personal events show up as busy time on your work calendar, and vice versa. The filter by day and time feature ensures that only relevant hours are synchronized, keeping evenings and weekends free for personal time.

Freelancers Juggling Multiple Projects

Freelancers often maintain separate calendars for each project or client to stay organized. Without synchronization, it is easy to overbook or miss deadlines. Very Good Calendar Sync keeps all project calendars aligned in real time, showing accurate availability across every engagement. The clone or redact feature is particularly valuable here, enabling freelancers to share full event details with active clients while showing only busy time to prospects or less critical contacts. This ensures professional transparency without compromising client confidentiality.

Agencies and Cross-Functional Teams

Agencies managing internal team calendars alongside multiple client-facing calendars face significant synchronization challenges. Team members need to see real-time availability for internal meetings, client calls, and personal time across the entire organization. Very Good Calendar Sync provides a unified view of availability without requiring everyone to use the same calendar provider. Each team member can keep their preferred calendar system while the app ensures everyone sees the same, honest availability. This eliminates confusion, reduces missed meetings, and improves team coordination across complex organizational structures.

Do you store any of my calendar data?

No. Very Good Calendar Sync runs entirely on your Mac and does not store, transmit, or process any of your calendar data on external servers. The app has no servers of its own, no data collection, and no analytics on your calendar. It uses your Mac's native calendar access to read and write events directly. Your data never leaves your device. This is a core architectural principle of the product, designed to eliminate the privacy and security risks associated with cloud-based calendar synchronization tools.

Which calendar providers are supported?

Very Good Calendar Sync supports any calendar that appears in macOS Calendar.app. This includes Google Calendar, Microsoft Outlook and Exchange, Apple iCloud, and any CalDAV account. If you can see it in your Mac's Calendar app, it works with Very Good Calendar Sync. There is no extra setup required, no additional connections to configure, and no third-party access needed. The app simply leverages the calendar accounts you have already configured in macOS.

Does it sync when my Mac is off or asleep?

No. Since Very Good Calendar Sync runs entirely on your Mac, it can only synchronize calendars when your Mac is powered on and awake. When your Mac is off or asleep, the app cannot monitor or update your calendars. However, once your Mac wakes up and the app starts running again, it will automatically detect any changes that occurred while it was offline and synchronize them accordingly. This ensures your calendars are always up to date shortly after your Mac becomes active again.

Is this app available for Windows or iOS?

No. Very Good Calendar Sync is a macOS-only application designed specifically to work with macOS Calendar.app and the native calendar access provided by the operating system. There are currently no versions for Windows, iOS, or any other platform. The app is built to leverage the unique privacy and security architecture of macOS, which is why it can offer on-device synchronization without any cloud infrastructure.

Very Good Calendar Sync offers three pricing tiers to match different usage patterns and budgets. One synchronization between two calendars is completely free with no payment required. When you are ready for more, choose from the following plans.

The Monthly plan costs 1.99 GBP per month, offering flexible month-to-month billing with the ability to cancel anytime. The Annual plan costs 19.99 GBP per year, providing the best value with over 15% savings compared to monthly billing. The Lifetime plan costs 39.99 GBP as a one-time payment, giving you the product forever with all future updates included.

All plans include unlimited synchronizations, support for all calendar providers, and email support. Each license is per user and covers all of your Macs. You can download the app for free and choose your plan directly within the application.