For iOS smart banners our customers will need to add the following meta tag to the first page that loads on their site (e.g. index.html):
<meta name="apple-itunes-app" content="app-id=myAppStoreID">
The app-id variable "myAppStoreID" needs to be replaced with your iTunes app ID. The app ID can be found in the iTunes store URL.
The iTunes app id in the URL is 770941673.
More information on iOS Smart Banners can be found
here.