If you would like to create a contact via Voxofon application on iOS device it will be added to your phone contacts list and will be visible in Voxofon Contacts section.
Navigate to Contacts tab in Voxofon application, press on "+" button > "New contact" screen will appear. Enter contact details and hit "Done". That's it, your contact should be saved and will be displayed under "All" tab.
Please note you can make any contact as Favorite and it will appear under Favorites section. Simply open contact details in Voxofon application and tap on "Star" icon - contact will be marked as Favorited and will appear under "Favorites" section. The contact will be also added to your device phone book.