Very Good Calendar Sync

Very Good Calendar Sync is a macOS-native application designed to automate the synchronization of multiple calendars without compromising user privacy or requiring third-party account linking. The software operates entirely on the user's Mac, utilizing the native calendar access permissions granted through macOS Calendar.app. This eliminates the need to share credentials, store data in the cloud, or grant access to external servers. The application monitors connected calendars for changes and automatically propagates those changes to designated target calendars based on user-defined rules. It supports any calendar provider that integrates with macOS Calendar.app, including Google Calendar, Microsoft Outlook, Exchange, Apple iCloud, and any CalDAV-compliant service. The primary value proposition is the elimination of manual cross-checking and double-booking across work, personal, and client calendars. Users configure synchronization rules once, specifying which weekdays to include, what hours of the day to sync, and whether to clone full event details or redact them to show only busy time. The application runs quietly in the menu bar and requires no ongoing interaction after initial setup. It is designed for consultants managing multiple client schedules, employees balancing work and personal commitments, freelancers with overlapping project calendars, and teams that need consistent availability visibility without exposing sensitive event metadata. The first synchronization between two calendars is free, with paid plans available for users who require multiple sync configurations.

Clone or Redact Event Details

Users have granular control over what information is shared during synchronization. The clone mode replicates full event details, including title, description, location, and attendees, to the target calendar. The redact mode strips all descriptive metadata and shares only the time block indicating busy status. This allows users to maintain privacy for personal events while still providing accurate availability information to colleagues or clients. The redaction applies to all event fields, ensuring that no sensitive information leaks through the synchronization process.

Filter by Day and Time Rules

Each synchronization configuration supports custom temporal filters. Users can select specific weekdays to include or exclude, such as syncing only Monday through Friday and skipping weekends. A daily time range filter allows limiting synchronization to defined hours, for example, 9:00 AM to 6:00 PM. Events falling outside the configured time window are not propagated to the target calendar. Additionally, users can set a start date for synchronization, ensuring that historical events remain private and only future activity is shared. These rules apply independently to each sync relationship.

No Accounts to Link or Third-Party Access

The application does not require users to create an account, log in to a web service, or share calendar credentials with any external system. All calendar access is handled through the native Internet Accounts configuration in macOS. The software reads and writes calendar data directly on the local machine. No data is transmitted to external servers, no analytics are collected, and no cloud storage is used. The application has no backend infrastructure of its own. This architecture ensures that calendar data never leaves the user's control.

Built into macOS and Runs in the Menu Bar

Very Good Calendar Sync integrates directly with macOS Calendar.app, requiring no additional applications or browser extensions. The software operates as a menu bar application, running in the background without occupying screen space or requiring manual intervention. After initial configuration, synchronization occurs automatically whenever calendar data changes. The application respects macOS power management and will not attempt to synchronize when the Mac is off or asleep. All synchronization logic executes locally, with no dependency on internet connectivity beyond what the calendar providers themselves require.

Consultants Managing Multiple Client Calendars

Consultants who work with multiple clients often maintain separate calendars for each engagement to keep billing and scheduling organized. Without synchronization, manually checking each calendar for availability leads to double-bookings and scheduling errors. Very Good Calendar Sync allows consultants to create a master calendar that aggregates busy time from all client calendars, with redacted event details to protect client confidentiality. The temporal filters ensure that only working hours are synchronized, and weekend events remain private. This provides a single source of truth for availability without exposing sensitive client information.

Employees Balancing Work and Personal Schedules

Professionals who use separate work and personal calendars face the challenge of ensuring their work team can see availability without exposing personal commitments. By configuring a one-way synchronization from the personal calendar to the work calendar using redacted mode, the employee's work calendar shows only busy time blocks for personal appointments. The work calendar remains the authoritative source for colleagues, while the personal calendar retains full event details. The automatic synchronization ensures that any new personal appointment immediately updates the work calendar, preventing colleagues from scheduling over personal time.

Freelancers Juggling Multiple Project Calendars

Freelancers managing multiple clients often maintain separate calendars for each project to track deadlines, meetings, and deliverables. Without synchronization, overlapping commitments go unnoticed until conflicts arise. Very Good Calendar Sync enables freelancers to create a consolidated view by synchronizing all project calendars into a single master calendar. The clone mode preserves event details for easy reference, while temporal filters exclude non-working hours. This provides a comprehensive overview of all commitments and ensures that new project deadlines are immediately visible across all calendars.

Agencies and Cross-Functional Teams

Agencies that manage client-facing calendars alongside internal team calendars need consistent availability across both domains. Internal team members need to know when client-facing staff are available for internal meetings, while client calendars should show only appropriate busy time. Very Good Calendar Sync allows agencies to configure bidirectional synchronization with different rules for each direction. Internal calendars can clone full event details for team visibility, while client-facing calendars use redacted mode to protect internal meeting specifics. This maintains transparency within the team while preserving confidentiality with clients.

Very Good Calendar Sync offers three pricing tiers to accommodate different usage levels. The first synchronization between two calendars is completely free with no payment required. For users who need multiple sync configurations, paid plans are available. The Monthly plan costs 1.99 pounds per month with flexible month-to-month billing and cancellation at any time. The Annual plan costs 19.99 pounds per year, providing a savings of over 15 percent compared to the monthly rate. The Lifetime plan costs 39.99 pounds as a one-time payment and includes all future updates. All paid plans include unlimited synchronizations across all calendar providers, email support, and a per-user license that covers all Macs owned by the user. Users can download the application for free and choose their plan within the app after testing the initial free synchronization.

Do you store any of my calendar data?

No. Very Good Calendar Sync operates entirely on your local Mac. The application reads calendar data directly from macOS Calendar.app, processes the synchronization logic on your machine, and writes the resulting events to the target calendar. No data is transmitted to any external server, cloud storage, or third-party service. The application has no backend infrastructure, no user accounts, and no data collection mechanisms. Your calendar data never leaves your control.

Which calendar providers are supported?

The application supports any calendar provider that integrates with macOS Calendar.app. This includes Google Calendar, Microsoft Outlook, Microsoft Exchange, Apple iCloud, and any CalDAV-compliant service. If a calendar appears in the sidebar of macOS Calendar.app, it is compatible with Very Good Calendar Sync. No additional setup or configuration is required beyond what is already established in your macOS Internet Accounts settings.

Does it sync when my Mac is off or asleep?

No. Very Good Calendar Sync requires your Mac to be powered on and awake to perform synchronization. The application respects macOS power management and does not wake your Mac from sleep. Synchronization occurs in real-time while your Mac is active. When your Mac wakes from sleep, the application checks for any changes that occurred during the sleep period and synchronizes them automatically. This ensures no updates are lost while preserving battery life and system resources.

Is this app available for Windows or iOS?

No. Very Good Calendar Sync is a macOS-only application. It is designed specifically to integrate with macOS Calendar.app and the native Internet Accounts framework. There are currently no versions for Windows, iOS, or any other operating system. The application requires the macOS operating system to function, as it relies on system-level calendar access APIs that are not available on other platforms.