The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Aaron Wardle:
Calc VAT is an easy to use VAT Calculator, designed to make your VAT calculations much faster than using a traditional calculator.Simply enter the amount you wish to calculate and select f you want to find out the inclusive VAT or add VAT to the original amount. Calc VAT will show you the breakdown of the amount and at any time you can change the rates or inclusive VAT settings, and the breakdown will automatically update for you.*Future Versions* ------------------------ We are very keen to make Calc VAT just right for you, please let us know in your reviews what new features you would like us to add to this application.