In the following thesis, we have presented the process of design a mobile application, operating on the Android platform, which serves as an assistance in calculating hydraulic parameters. Further, we have delineated the basics of coding and the programming language in which the application was built, and analyzed the equations that the application contains. Next, we have demonstrated and described the tests with which we compared the values measured with the results calculated by the application. The purpose of the thesis is to construct a working application, which is to be used primarily as a help in alleviating work in dimensional placement of hydraulic elements. What is also shown is the results of measurements of revolutions in a hydraulic motor with pressure points on various areas of the systems, temperature of the oil, pressure loss through a straight pipe, as well as the calculated values. As it turns out, the values are comparable and the applications works within the expected bounds.