Click on the "Menu" tab in the upper left hand corner of your app, then select the “My Contacts” at the top. From the contact list, you can click any individual to see the contact details. If you're using an iPhone, you will see a button called “Save to Phone Address Book” under the “Contact Information” section. Click it to save current contact to your phone address book. Please note that the functionality is temporarily disabled on Android phones.
If you are looking to export contacts in CSV or Excel files, we currently do not support that.