Very Good Calendar Sync

Very Good Calendar Sync is a macOS application designed to solve one of the most common productivity problems: keeping multiple calendars synchronized without sacrificing privacy or security. The app works directly with your existing calendars in macOS Calendar.app, including Google Calendar, Microsoft Outlook, Apple iCloud, and any CalDAV account. Its core function is simple: you set up synchronization rules once, and the app runs quietly in the background, automatically updating your calendars whenever changes occur.

The fundamental value proposition of Very Good Calendar Sync is that it eliminates double-booking and calendar chaos without requiring you to link accounts, share credentials, or expose your data to third-party services. The app runs entirely on your Mac, meaning your calendar data never leaves your device. There are no servers, no data collection, and no analytics tracking your events. This makes it an ideal solution for anyone who values privacy but needs reliable calendar synchronization.

This product is built for consultants managing multiple client calendars, employees balancing work and personal schedules, freelancers juggling various projects, agencies coordinating internal and client-facing calendars, and anyone who uses more than one calendar and wants to maintain accurate availability. The app is designed to be set up in approximately two minutes, after which it operates automatically without requiring ongoing attention. Very Good Calendar Sync offers flexible synchronization options, including the ability to filter by specific days of the week, set daily time ranges, choose a start date, and decide whether to share full event details or only show that you are busy.

Clone or Redact Event Details

You have complete control over what information gets shared when calendars synchronize. Choose to clone events with full details, including title, description, and location, or redact them to show only that you are busy during that time period. This feature allows you to share your availability without sharing sensitive details about your personal life, medical appointments, or confidential meetings. The choice is applied per synchronization rule, giving you granular control over different calendar pairs.

Filter by Day and Time

Each synchronization can be customized with specific rules about when events should appear on your other calendars. You can choose to synchronize only on weekdays, weekends, or pick specific individual days. Additionally, you can set a daily time range to limit syncing to work hours, such as 9 AM to 6 PM only. A start date can also be configured so that synchronization begins from a specific point in time. These filters ensure that your personal calendar is not cluttered with work events during off-hours or weekends.

Stays Out of the Way

Very Good Calendar Sync runs quietly from your Mac's menu bar, operating entirely in the background. Once you set up your synchronization rules, the app monitors your calendars for changes and automatically updates them without any manual intervention. You do not need to open the app, press sync buttons, or check for updates. The app handles everything automatically, allowing you to focus on your work and life instead of managing calendar conflicts.

No Accounts to Link

The app does not require you to create an account, log into a third-party website, or share your Google, Microsoft, or Apple credentials. Your calendar access is handled entirely through macOS' built-in Internet Accounts system. This means your credentials stay safe on your Mac, and there is no external service that could be compromised. The app has no servers of its own, collects no data, and transmits nothing externally. Your calendars communicate directly with your Mac, and nothing leaves your device.

Consultants Managing Client Calendars

Consultants often work with multiple clients, each using different calendar systems. Without synchronization, this leads to constant manual cross-checking, double-bookings, and missed meetings. Very Good Calendar Sync allows consultants to link each client's calendar to their personal master calendar, with full control over what details are shared. A consultant can choose to clone event details for client meetings while redacting personal appointments to show only availability. The app runs automatically, ensuring the consultant always sees accurate availability across all calendars without manual effort.

Employees Balancing Work and Personal Schedules

Employees who use separate work and personal calendars face the constant challenge of avoiding conflicts. A dentist appointment during work hours should block that time on the work calendar, but the details should remain private. Very Good Calendar Sync enables employees to synchronize their personal calendar with their work calendar using redacted events that show only busy time. The app filters by work hours and weekdays, so personal events outside of working hours do not appear on the work calendar. This creates an honest representation of availability without oversharing personal information.

Freelancers Juggling Multiple Projects

Freelancers often maintain separate calendars for each project or client to keep work organized. Without synchronization, they risk overbooking themselves or forgetting commitments. Very Good Calendar Sync allows freelancers to link all project calendars to a single master calendar, with customizable rules for each synchronization. A freelancer can choose to clone full event details for one client while redacting details for another. The app handles updates automatically, so when a client reschedules a meeting, the freelancer's other calendars update instantly, preventing double-bookings.

Agencies and Cross-Functional Teams

Agencies must coordinate internal team meetings, client calls, and project deadlines across multiple calendars. Without synchronization, team members often schedule meetings during times that appear available but are actually blocked by a client commitment on another calendar. Very Good Calendar Sync enables agencies to link internal and client-facing calendars so everyone sees the same real-time availability. Team members can see when colleagues are truly busy, regardless of which calendar the commitment originated from. This eliminates confusion, reduces scheduling overhead, and ensures meetings happen when they should.

Do you store any of my calendar data?

No. Very Good Calendar Sync runs entirely on your Mac and does not store any of your calendar data on external servers. The app has no servers of its own, collects no data, and transmits nothing externally. Your calendar data never leaves your device. The app uses your Mac's native calendar access to read and write events directly, and all processing happens locally. This means there is no risk of a data breach exposing your calendar information, and no third party ever has access to your events.

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 beyond what you have already configured in macOS' Internet Accounts. The app simply uses the calendar access that is already available on your Mac.

Does it sync when my Mac is off or asleep?

No. Very Good Calendar Sync runs on your Mac and requires your computer to be powered on and awake to perform synchronization. When your Mac is off or asleep, the app cannot monitor your calendars for changes. However, once you wake your Mac and it connects to the internet, the app will detect any changes that occurred while you were away and synchronize them automatically. For most users, this is sufficient because calendar changes are typically made during waking hours.

Is this app available for Windows or iOS?

Currently, Very Good Calendar Sync is available only for macOS. There is no Windows or iOS version of the app. The app is designed to work directly with macOS Calendar.app and uses macOS-specific features for calendar access and background operation. If you need calendar synchronization on other platforms, you would need to use a different solution. However, because the app works with standard calendar protocols like CalDAV, the synchronized calendars will appear correctly on all your devices, including iPhone, iPad, and Windows computers, through their respective calendar apps.

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

The Monthly plan costs £1.99 per month and offers flexible month-to-month billing with the ability to cancel anytime.

The Annual plan costs £19.99 per year, which saves over 15 percent compared to the monthly plan. This is the best value for ongoing use.

The Lifetime plan costs £39.99 as a one-time payment and includes all future updates. This is ideal for users who want a permanent solution.

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