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 Rasmus Barringer:
If you have a color deficiency (color blindness) this is the app for you. By using the camera in your device, Color Vision will give you a colorful view of the world - in real time!How it works:The colors that you cannot see are shifted into your visible spectrum. By using the phone and reality side-by-side you will be able to experience all colors. In addition, the app continuously samples the color of a marker in the middle of the screen and shows its position in the color spectrum.Supports:- Red-Green deficiency (deuteranope/protanope).- Blue-Yellow deficiency (tritanope).Need help with another deficiency? Please contact our support page and we will do our best to help you:http://colorvisionapp.blogspot.com/Thanks to Evert Pihlblad for the initial idea to this app.