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 snopia:
Find all the functions of scientific calculator and RPN with the new iPhone calculator. Thanks to the RPN mode you will be able to calculate sums at great speed which greatly reduces the typing. With a simple and uncluttered interface design, this calculator uses the very efficient and much talked about RPN system used by engineers and scientists, now on iPhone.
