The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Joben Gohlke:
Secure peace of mind without sacrificing a beautiful lock screen. Simply select any image from your camera roll to serve as a backdrop for your most important medical details.Enter the biographical and medical information you feel would be most beneficial to first responders in the case of an emergency that leaves you incapacitated. Clipper will overlay this information in a clear and easily digestible format on top of your chosen background. It will save this new image to your camera roll for easy access. Set this image as your lock screen background and feel safe in the knowledge that first responders will have the important details they need to know about you at their fingertips.