Calculadora: Etanol x Gasolina is a free Android app developed by Suporte Master. It is designed to assist users in making an informed decision about which type of fuel, ethanol or gasoline, is more cost-effective for their flex-fuel vehicles.

With the latest version 5.0, the app now allows users to add their vehicles to a local database, including information about average fuel consumption. This feature greatly enhances the speed and accuracy of the calculations provided by the app.

The layout has been revamped to provide a user-friendly and dynamic navigation experience. The app's functionalities for calculating the amount of fuel needed based on the distance to be traveled, as well as the mileage that can be achieved with a certain amount of fuel, have also been improved.