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 Global Telelinks:
WhizCall iPhone App is a smart phone call back service that allows you to trigger an international call at the quarter of your current international call cost.Register your WhizCall Call Back service account with the default call back number where you wish to accept an international call triggered from your smart phone app.WhizCall iPhone App calls your default call back number first and once the call is answered, another call is triggered to connect you to the desired destination number from across 100 destinations across the globe.WhizCall iPhone App uses the iPhone carriers data network to trigger a call back to the users default call back number and connects the call internationally to the desired destination number upon answering the incoming call to the users iPhone number.