This application is intended for those who like to save money.When refueling, which fuel is more economical, gasoline or ethanol?You know when you arrive at the gas station and the price difference between gasoline and ethanol is not very big, and you are in doubt between which fuel to fill, I can help you choose which one.As we all know Ethanol consumes faster than Gasoline, but sometimes depending on the value it pays more to supply with Ethanol, and sometimes it doesnt.How to use this Application:- Upon arriving at the gas station you must enter the value of Ethanol and Gasoline within the application;-After that, just type in the "CALCULATE" button and the application will tell you which fuel is more advantageous at that gas station.