Fuel Calculator by d-Dev is a free Android app that serves as a simple calculation tool for your vehicle. It offers four main features that help users calculate fuel economy, distance, fuel, and amount spent.

The fuel economy feature provides information about how much fuel your vehicle consumes per liter. This is useful for those who want to keep track of their vehicle's fuel efficiency. The distance feature allows users to calculate the distance they will travel, which is helpful for planning trips or commutes.

The fuel feature helps users keep track of the total liters of fuel that have been filled in their vehicle. This feature is especially useful for those who want to keep track of their fuel expenses. Finally, the amount feature calculates the total amount that will be spent on fuel, which is helpful for budgeting purposes.

Overall, Fuel Calculator is a simple and straightforward app that provides useful information for vehicle owners. It is easy to use and provides accurate calculations. However, it should be noted that the app does not offer any additional features beyond the four mentioned above.