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 Sparks Technology Company:
This will able to help business traveler on the move and need to create the sales quotation for your client instantly.Quick Quotation creation in PDF format, you able to email out attachment, print it or view it via others PDF viewer. This free version will allow you to create the invoice with one item.