Etanol ou Gasolina is a free Android app developed by Vitoro Coelho, falling under the Utilities & Tools category. The app calculates if it is more advantageous to fuel your vehicle with ethanol or gasoline based on the prices of both fuels.

Once the prices are entered, the app automatically performs the calculations and displays an approximate value of the potential savings in each scenario. Additionally, the app shows the amount of money that would be necessary to invest in a conventional financial market to achieve the same savings.

In future versions, the app will allow for customized calculations by enabling users to input their vehicle's fuel consumption with each type of fuel. This feature will provide more accurate results and hence, greater opportunities for savings.