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 Propeller Group:
A tool aimed at Doctors and other Healthcare Practitioners to use with patients to illustrate their risk of cardiovascular disease, such as heart attacks or stroke. The risk estimate is based on measurements input by the user, e.g. the patients blood pressure, cholesterol etc. There are a number of different ways to show the patients risk, such as a heart age screen (shows the age of the patients heart) and a healthy years screen (shows the expected life years of a patient). These screens can highlight the steps, both lifestyle or drugs, that could be taken to reduce an individuals risk of cardiovascular diseases (interventions).