A free app for Android, by Pricereduc.

The Fraction Decimal Calculator app allows you to easily convert between any two different units of measurement, for example, from meters to kilometers, or from dollars to pounds. This is very useful if you want to measure something, and it is not available in the standard app, or you want to measure something in a different unit, and you need to convert from one unit to the other.

The app has also a built-in calculator that is useful for making calculations, and it is easy to use and very efficient. The app has a built-in function to calculate the area of a circle, the volume of a cone, the surface area of a square, the volume of a cuboid, the surface area of a hexagon, the surface area of a polygon, and the volume of a rectangular box.