We are making an App which calculates cultivated area in [ha] and also the fuel consumption will be calculated [liter/ha].
The working width is registered for trailers(machines) so the cultivated area is came from the following way: mileage multiplied with the working width.
For trailer (machine, what is hung behind the tractor) binding we have developed a codepad (connected to the tracking unit, RS232), which is also suitable for driver binding.
The App is in a test stage, but I'm sure that it will be available with full functionality (exporting, filtration, etc.) in two weeks.
Eflotta Vehicle Tracking Ltd, Hungarywww.eflotta.com