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Two-way calendar sync for Google Calendar™: Outlook, iCloud, other Google™ accounts, Airbnb, Booking.com or any iCal (.ics) link. Updates in minutes, no double bookings.
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Listing updated:November 2, 2026
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Overview
ICalSync syncs your other calendars with Google Calendar™ in minutes: Outlook and Microsoft 365, Apple iCloud, other Google™ accounts, Airbnb, Booking.com, Vrbo, Expedia and any calendar with an iCal (.ics) link. New bookings, meetings and cancellations show up while they still matter.

🔗 CONNECT ANY CALENDAR
• Outlook / Microsoft 365: sign in with Microsoft and pick a calendar.
• Another Google™ account: bring your personal calendar into your work account, or the reverse.
• Apple iCloud: connect with an app-specific password.
• Any iCal / ICS / webcal link: Airbnb, Booking.com, Vrbo, Abritel, FeWo-direkt, Expedia, Agoda, school timetables, sports schedules, booking tools.

🔄 ONE-WAY OR TWO-WAY
Copy a calendar into Google Calendar™, or keep both in step: events you create in Google Calendar™ are copied back to Outlook, iCloud or the other Google™ account.

🏠 FOR VACATION RENTAL HOSTS
• All your Airbnb, Booking.com, Vrbo and Expedia reservations in one calendar.
• One export link per channel: a booking on one platform blocks the dates on the others.
• An e-mail alert if two bookings ever overlap.
• Guest names stay private: only "Booked" is copied.

⚙️ YOU CHOOSE WHAT IS COPIED
• Titles or just "Busy", descriptions, locations, attendees.
• Mark copies as private, add a label like [Work].
• Recurring events, exceptions, all-day events and time zones handled correctly.
• Deleted and canceled events disappear automatically.
• Pause, edit, delete or sync any calendar right away from the side panel.

🚀 HOW IT WORKS
1. Install ICalSync and open it from the Google Calendar™ side panel.
2. Click "Connect a calendar": sign in, or paste the calendar's link.
3. Choose the Google Calendar™ to sync with, one-way or two-way.
ICalSync keeps everything up to date in the background.

💳 PLANS
14-day free trial with every feature, no credit card. Then plans for individuals, professionals and vacation rental hosts. Administrators can install ICalSync for their whole Google Workspace™ domain.

🔒 PRIVACY
ICalSync only changes the events it creates. Sign-ins and passwords are stored encrypted and deleted when you disconnect. Your data is never sold.

🌍 Available in English, French, Spanish, Portuguese, German, Italian and Japanese.

Google Calendar™, Google Workspace™ and Google™ are trademarks of Google LLC. Outlook and Microsoft 365 are trademarks of Microsoft Corporation. iCloud is a trademark of Apple Inc. Airbnb, Booking.com, Vrbo, Abritel, FeWo-direkt, Expedia and Agoda are trademarks of their respective owners. ICalSync is not affiliated with or endorsed by these companies.
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ICalSync will ask for the permissions shown below. Learn more
ICalSync will need access to your Google account
This will allow ICalSync to :
Run as a Calendar add-on
See the events you open in Google Calendar
Edit the events you open in Google Calendar
See, edit, share, and permanently delete all the calendars you can access using Google Calendar
View and edit events on all your calendars
Connect to an external service
Allow this application to run when you are not present
View your country, language, and timezone
See your primary Google Account email address
See your personal info, including any personal info you've made publicly available
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