Earn free Z Espress coffees and Z2O Max Wash car washes with the official Z App. Plus, store your Fly Buys or Air NZ Airpoints card in Z App to make it easier to earn points and get great rewards. Z App is a digital rewards card that gives you virtual stamps each time you buy a Z Espress coffee or Z2O Max Wash car wash or Z2O Max Wash & Vac.