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 B.I.M. srl:
Start today your Wishlist! Download Regalister to join your friends who are using it .Take pictures of your desired gift within stores or shop windows and share it in your Facebook timeline.When will you have to make a gift to a friend, you will be able to browse on Regalister the geolocalized wishlist easily on the city map. So you'll know exactly which present to give, and above all, where to go and buy. With Regalister you'll save time and money, but, above all, you will never receive a wrong gift anymore!