What Is Calendar Sync?
The automatic synchronization between your scheduling tool and calendar applications, ensuring availability is always accurate and new bookings appear on your calendar instantly.
Calendar sync is the connection between your scheduling tool and your calendar application (Google Calendar, Outlook, Apple Calendar, etc.). It ensures that your booking page always reflects your true availability and that new bookings appear on your calendar automatically.
One-way vs. two-way sync
Calendar sync comes in two flavors:
- One-way (read only): Your scheduling tool reads your calendar to detect conflicts. It won't show a slot if you already have an event at that time. But new bookings don't automatically create calendar events — you'd have to add them manually.
- Two-way sync: Your scheduling tool both reads your calendar for conflicts and writes new events when bookings are confirmed. This is the gold standard — everything stays in sync without any manual work.
Multi-calendar sync
Most professionals have multiple calendars — work, personal, side projects, family. Good scheduling tools let you connect all of them. When computing availability, the tool checks every connected calendar for conflicts. Your dentist appointment on your personal calendar blocks that slot on your booking page.
Why sync speed matters
The speed of calendar sync directly affects double booking risk. If sync happens every 15 minutes, there's a window where a new personal event won't be reflected on your booking page. Modern tools like skdul sync in near real-time, checking calendar status at the moment a guest views your availability.
Calendar sync is the foundation of every other scheduling feature. Without it, buffer time, availability rules, and scheduling automation are all built on incomplete data.
Frequently asked questions
What's the difference between one-way and two-way calendar sync?
One-way sync reads your calendar to check for conflicts but doesn't write new events back. Two-way sync both reads conflicts and creates new calendar events when bookings are made. Two-way sync is strongly preferred.
How quickly does calendar sync update?
Most modern scheduling tools sync in near real-time (within seconds). Some older tools poll at intervals (every 5-15 minutes), which can lead to brief windows where double bookings are possible.
Related terms
Two-Way Calendar Sync
A bidirectional connection where changes in either your calendar or scheduling tool are automatically reflected in the other — both reading conflicts and writing new events.
Read moreScheduling BasicsDouble Booking
When two or more events are scheduled at the same time on your calendar, creating a conflict that forces you to cancel or reschedule one.
Read moreTechnicalCalendar Overlay
Viewing multiple calendars layered on a single view to spot conflicts, gaps, and availability across different accounts or team members.
Read moreScheduling BasicsAvailability Rules
Configurable settings that define when you're available for bookings — including working hours, specific days, date overrides, and minimum notice periods.
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