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 Unique Automation:
iShower Pro is a software application which uses the WiFi capabilities of iPhone or iPod Touch to control all the functions of Adelina shower control systems and give real time feed back of the water temperature at each outlet as well as the temperature within the shower enclosureAn Adelina shower system can be made up of a large number of water mixing valves each delivering 25-30 litres per minute. This version of iShower Pro is limited to four valves and can supply around 100 litters per minute (in total) to four outlets with individual volume and temperature control.iShower Pro is used to warm up the shower area prior to showering and for setting up of user presets.Adelina shower systems boast both RS232 and TCP/IP for integration with home automation systems in addition to their own all-glass touch interfaces - waterproof and screwless. The size of an ordinary double gang UK socket, the interface comes as standard in black, white and orange and can be customised to match the surrounding area.