The Download Now link directs you to the Apple iTunes Store, where you can continue the download process. You must have an active iTunes account to download the application. This download may not be available in some countries.
From Slam Technology:
Have you ever been out shopping and tried to figure out the correct sales price after the discount? What if they offer an additional discount on top of the already discount price. iFinal Price Pro will allow you to enter the price and discount and give you the final price. It will also allow you to enter an additional discount and give you the final price after both discounts are applied. A great way to know exactly what the price will be at the register before you check out.