The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Sharp Electronics Corporation:
This SHARP AQUOS Blu ray Control App will turn your iPad / iPhone or iPod touch into a Wi-Fi enabled remote control for the following SHARP Blu ray players: BD-HP35U and BD-HP75U.With this application you will have basic control over SHARP Blu ray player functions.Please note: this control application will allow basic control functions via three different control screen selections with remote control button layout or a finger gesture mode; user can select the interface control from three different selections.