The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Flughafen Zrich AG:
More enjoyable travel with the official Zurich Airport app.This app offers extensive information for travellers, those meeting travellers, and shoppers. Push messages keep you automatically informed of the status of your flight.Automatic updates of: -Arrival and departure times-Check-in, gate, delaysInformation:-All arrivals and departures, incl. gates-Check-in options and locations-Airlines -Baggage restrictions-Security checks, customs restrictions-Special needs-Shopping and dining guide-Public transport-Parking and car hire-Hotels near the airport-Contact details