I'm going to South Africa with my MacBook Air and iPhone 6. Do I need a converter or an adaptor?

I'm going to South Africa with my MacBook Air and iPhone 6. Do I need a converter or an adaptor?

All recently-made electronics accept any voltage, but you probably need a plug adapter.

http://www.adaptelec.com/index.php?main_page=document_general_info&products_id=309