Connect Apple Calendar (iCloud) so your receptionist can check your availability and book appointments that show up on your iPhone, iPad, and Mac.
What you need
Your Apple ID (the email you use for iCloud).
An app-specific password. Apple requires this for outside apps. Your regular Apple ID password won't work.
An active SkipCalls subscription.
Step 1: Create an app-specific password
Go to appleid.apple.com and sign in.
Open Sign-In and Security and choose App-Specific Passwords.
Create a new password and name it "SkipCalls".
Copy the password (it looks like xxxx-xxxx-xxxx-xxxx). Apple shows it only once.
Step 2: Connect in SkipCalls
On the web:
Open Tools & Setup → Appointments and switch to the Booking systems tab.
Click Connect calendar and choose Apple Calendar.
Enter your Apple ID and the App-Specific Password, then click Connect.
In the mobile app: go to Settings → Integrations → Connect Calendar, choose Apple Calendar, and enter the same details.
Step 3: Choose receptionists and set your hours
On the Booking systems tab, click Manage next to your iCloud calendar and tick the receptionists that should book into it.
Open the receptionist, go to the Booking tab, and click Configure to set work days, hours, appointment length, and the gap between appointments.
Click Save Settings and make a test call.
Disconnecting
In SkipCalls, open the ⋯ menu next to the calendar and choose Remove from SkipCalls.
Or revoke the app-specific password at appleid.apple.com. SkipCalls will then ask you to reconnect.
Troubleshooting
Can't connect: make sure you used an app-specific password, not your regular Apple ID password.
No calendars found: you need at least one calendar stored in iCloud, not only on your device or in another account.
Reconnect notice: if you revoked the password, create a new one and connect again.
For all booking settings and how booking works on a call, see Appointment Booking: Connect Your Calendar So Your Receptionist Can Book.