Construction calculator m2

This calculator will help to calculate the area of walls and floors in rooms of various configurations.
The ability to enter the dimensions in meters and millimeters, feet and inches.
Calculate the perimeter of baseboards, subtract window and door openings, calculates linear meters of slopes, the free version is no option to enter the size more than one window and door, as well as saving the results of calculations within the program, and on the phone as a text.file.