Calendar FreeSyncWorks with the calendars you already use
Calendar FreeSync bridges Google Calendar and Microsoft Outlook so your availability is always accurate, no matter which platform someone checks.
Google Calendar
Personal and Google Workspace accounts
- Connect via Google OAuth
- Real-time sync via Google Calendar webhooks
- Supports free gmail.com and Workspace accounts
- Use as source, target, or both
Microsoft Outlook
Outlook.com, Office 365, and Microsoft 365
- Connect via Microsoft OAuth
- Real-time sync via Microsoft Graph webhooks
- Supports personal Outlook and business Microsoft 365
- Use as source, target, or both
What gets synced
Everything you need to stay conflict-free, nothing you did not ask for.
Real-time event sync
New and updated events are synced instantly using webhooks - no polling, no delay.
Busy/free blocking
When an event is synced, a block is automatically created on the target calendar to protect that time slot.
One-way or two-way sync
Choose one-way sync when one calendar is your source of truth, or two-way for full bi-directional alignment.
No duplicates
Calendar FreeSync tracks which events it has already synced so your calendars stay clean and accurate.
Secure OAuth connections
Calendar access is granted through each provider's official OAuth flow. We never store your calendar passwords.
Automatic reconnect
If a calendar connection drops, Calendar FreeSync resumes syncing and catches up on missed events once reconnected.
How it works
Three steps from sign-up to fully synced.
Connect your calendars
Sign in and authorize Calendar FreeSync to access your Google Calendar and Microsoft Outlook accounts via OAuth.
Configure your sync
Choose which calendar is the source, which is the target, and whether you want one-way or two-way sync.
Stay in sync automatically
That's it. Calendar FreeSync keeps both calendars aligned in real time from that point forward.
Integration questions
Do I need a paid Microsoft or Google account?+
No. Calendar FreeSync works with free personal Google accounts and free Microsoft accounts. Business accounts (Google Workspace, Microsoft 365) are also supported.
Does Calendar FreeSync sync event details or just block time?+
By default, Calendar FreeSync creates a block on the target calendar to protect the time slot. Event details like title and description stay private. This keeps your work calendar from leaking into your personal one and vice versa.
Is Apple Calendar or iCloud supported?+
Not yet. iCloud Calendar support is on the roadmap and coming in a future update. Right now Calendar FreeSync supports Google Calendar and Microsoft Outlook (including Office 365 and Outlook.com).
Can I sync more than two calendars?+
Yes, with a Pro plan you can set up multiple sync connections. For example, one from Google to Outlook and a separate one from Outlook to another Google account.
What happens if I delete an event from one calendar?+
When you delete an event, Calendar FreeSync detects the deletion via webhook and removes the corresponding block from the target calendar automatically.
Ready to connect your calendars?
Set up your first sync in under a minute. No technical knowledge required.