Flexy - Ethanol or Gasoline? is a free Android app developed by Petrus.MOBI. It is designed to help drivers of bi-fuel vehicles to determine which fuel is cheaper for their car, ethanol or gasoline. The app is easy to use and requires no special permissions. You simply enter the price of ethanol and gasoline, and the app calculates which fuel is more cost-effective for your vehicle.

Flexy also allows you to register your car and add information about the average consumption of gasoline and ethanol, both in the city and on the highway. This feature provides more precise calculations for your vehicle. The app shows you the cost savings in Real, both per liter and per tank, and it is faster than other similar apps on the market.

The app has a modern look that is compatible with Android versions 2.2 to 5.0. It can also be saved to your SD card to save space on your device. In just a few seconds, you can determine which fuel is the cheapest for your car and save money effortlessly.