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 Yi Hui Chung:
FootFit measures your foot to find the suitable shoe size for you.FootFit using iphone camera and a coin to measure your foot.Simple and easy to use. FootFit provides the auto-find-foot function and manual measure function too. FootFit can save the measure results, to save the foot size of you family or friends.