Fuel consumption

This application allows you to keep a list of vehicles. You can record the refueling and oil change (including notes on the next exchange) for each car. From provided data calculates application the average fuel consumption (overall and for each refueling) and draws a graph of consumption. The application can work off-line and on-line. Online application backs up your data in order to preserve data when reinstalling or synchronizing among multiple devices. The application needs yout to have entered at least one gmail account in the system. Any comments and suggestions are welcome!