When you buy fuel, just enter the amount you purchased and your current odometer value; FillUp will calculate your mileage and maintain a log of your fill-ups. * Manages data for one or more vehicles. * Calculates and plots average gas mileage. * Calculates and plots monthly totals for gas purchased and distance driven. * Stores all data on the device – doesn't use your data plan. * Can import/export your data to CSV files on your sdcard. * Share the CSV files with other Apps for cloud backup! * Selectable units of measurement – can calculate: * miles per gallon (MPG) * kilometers per liter (KM/L) * liters per 100 kilometers (L/100KM) * miles per imperial gallon (UK MPG) – from miles and liters. * miles per imperial gallon (UK MPG) – from kilometers and liters.