From the Ruralidays website:
Log in to your Ruralidays account at https://www.ruralidays.com/propietarios/login/
On a computer, click on the house icon (Manage your rental) in the left-hand panel to open the dropdown menu. Then click on the Calendars section.
On mobile: you have a direct shortcut to the Calendar in the fixed bottom panel.
Once inside the Calendar, you can click on iCal Synchronizations and then on Create a Synchronization, so that owners can copy the iCal calendar from Ruralidays in the upper field and paste the external iCal in the lower field.
Choose "Others" and copy the iCal link to export Ruralidays bookings to Check-in Scan.
From the Check-in Scan website:
Log in to the web control panel of your account.
Click on the Properties section.
Click on Edit.
Inside the property settings:
Click on the iCal tab.
Simply paste the link extracted from Ruralidays and then click on Import iCal.
In a few minutes, your reservations from Ruralidays will start syncing in the Reservations tab of Check-in Scan.