Can I choose which address book Covve syncs with?

Covve is designed to automatically synchronize with all available contact groups on your device, so unfortunately there is no way in Covve to maintain a contact list separate with the contacts you have on your phone.

If that is an option for you, you can remove certain contact groups from your phone, so those will not appear in Covve either. Also, depending on the number of contacts you have, a workaround would be to archive your non-business contacts in Covve - or to favourite or use tags to group your important business contacts.