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 Michael Schmidt:
'Kraftstoff' (Fuel) offers you an uncluttered and elegant way to track your fuel consumption.Cars:- Supports multiple vehiclesFill-Up:- On each refuel simply enter distance driven, fuel unit price and amount of fuel- Fuel data can be added and edited afterwards- Partial fill-ups are supported (the data is settled on next full fill-up)Graphical Display:- Select a car and turn iPhone into landscape mode to get history charts for milage, fuel cost per liter/gallon and km/mile Further Features:- Export of your data as email (CSV attachment) - Reimport data from CSV file