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.
This simple application is an emergency phone dialer. It stores the emergency phone of the person you will need to call during an emergency. When the application is launched for the first time, pushing the big red button will ask you to set the emergency number. From now on, pushing this button will dial the emergency number. The set number can be changed anytime by pushing the Information icon on the lower right corner.