Protractor tool is an application that facilitates the task of measuring angles on an object or surface, and also works as a plumb instrument and digital inclinometer to determine if a plane or a surface are in perfectly vertical position (plumb). It is very useful in case you do not have a real protractor, and you need to perform some geometric task. In case it is used as a plumb line or inclinometer it is a useful tool to perform some work in the area of construction, masonry, or carpentry, or