Petroleum-based fuels and biofuels are "energy" because of their nature they are affected by changes in temperature. They contract volumetrically with the cold and expand with heat. The international standards establish the deliveries and billing of these products adjusted to the optimum temperature of operation - "energy" - of fuels of 15.5555 [newspaper] º Celsius equivalent to 60º Fahrenheit. The incalculable "energy" losses in retail business transactions for service stations and consumers inspire our App, since those who buy the altered product in its volume, receive "more energy" for less amount of money on finding At temperatures below 15.5555 [periodic] ° Celsius, or vice versa, paying more money for "less energy" with temperatures above 15.55 [periodic] ° Celsius. As two mistakes are not a wise move, the fuel temperature compensator "Fire Fuel App" equals this error and tells you the "right energy" to receive and pay.