There are 2 different sync options - Company Sync and Personal Sync.
Company (Admin) sync settings:
Company sync setting: This sync is only available to admins. It allows you to create a two-way sync between a Google calendar and the Check Cherry sales calendar. The business-wide calendar blocks off dates for bookings for the entire business.
Personal sync settings: Sync your personal calendar to manage your own availability and see your assigned bookings.
The "personal" calendar blocks off availability on appointments since those pertain to a single user.
You can choose which calendar to sync with, as well as prevent bookings during busy times on your synced calendar.
Pull events from Google Calendar
Prevent my business from taking bookings during busy times on my calendar
Enforce buffer before and after events
Select which calendar to sync with
Choose what to pull from your Google calendar
Choose what to send to your Google calendar
Personal Sync (Admin only):
The Personal Sync allows you to
Prevent yourself from being assigned to bookings during busy times on your calendar
Enforce buffer between and after events on your Google calendar
Select which calendar to sync with
What's the difference between the Primary calendar and the Default calendar in the sync setup?
When a third-party service asks which calendar to sync in Google Calendar, the labels primary and default sound similar but mean slightly different things depending on context:
✅ Primary calendar
The main calendar tied to your Google account
Always exists
Cannot be deleted
Most users’ personal events live here
Think: “Your core personal calendar.”
⭐ Default calendar
The calendar Google (or an app) uses when creating new events if no specific calendar is specified
Often the same as Primary, but can be different if you’ve changed your default in settings
Can be one of your other calendars (work, shared, etc.)
Think: “Where new events go by default.”
How this matters for third-party syncing
If you choose Primary → the integration reads/writes only your main personal calendar.
If you choose Default → the integration uses whichever calendar is currently set as your default target for new events.
Practical guidance
If you want predictable behavior → pick Primary.
If you intentionally route new events to another calendar (e.g., a work or bookings calendar) → pick Default.
Quick rule of thumb
Primary = identity
Default = preference