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.
WiDrive is an application used to control remote control Tamiya cars with an onboard WiFi enabled Arduino. You use the iPhone/iPod Touch to steer the car by tilting it like a real steering wheel and control the throttle from the touch screen controls