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 Adrian Franco de la Rosa:
50% off!!! iConvertU+ HD is a nice and easy to use unit converter for your iPad! You can convert units like: -Temperature -Length -Weight -Time -Power-Storage -Speed And also a calculator for your operations.