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 Resolution Interactive Media:
Preview Madico window films right on your iPhone! Simply take a picture out the window you want to apply the film to, pick your film, and "Voila!" you'll see a preview of the film as if it were applied to your window!
Madico Film Picker for iPhone
