Go to top menu option Administration -> User settings -> Synchronization and enable the sync of your choice: contacts or calendar.
In both cases,SpinOffice creates a DAV-account. DAV is an Internet standard / protocol designed to allow users to access and share contact data and calendars on a server. The steps how to activate the DAV sync accounts are instantly sent to you by email once the sync is activated.
All contacts and /or your calendar in SpinOffice will be in sync on any Apple (Mac & iOS) or Android device where the DAV-account is configured. Your contacts are added as group to the default Contacts app of your device. And the calendar is added as separate calendar in the default Calendar app.
Go to Chapter 14. Synchronize with mobile devices for more information.