Calculos na Obra is a free, versatile, and user-friendly app that provides a quick, accurate, and reliable solution to the most complex calculations. It has been developed by a team of civil engineers with the goal of simplifying the process of solving mathematical equations and making it as easy as possible for users to use. 

In addition, it is an excellent tool for professionals in the construction and renovation industry as well as for individuals who need to perform calculations for their daily life.

This application has been designed to work on Android devices. It is compatible with most Android devices and operating systems.