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 Amed Hussaini:
The Grazie Tip Calculator blends form with function and brings you a simple and effective tool to calculate the gratuity on your next restaurant bill. There are many tip calculators for the iPhone but this one gets the job done in a style unique to the App Store.Features:Group split - Divvy up your next meal amongst friends.Taxes - Optionally calculate the tip, pre-tax.Intuitive - No guess work. We have made it simple and effective.If you have any suggestions or comments, please feel free to reach the developer directly:firstname.lastname@example.org