This paper describes and elaborates on a system used for measuring the surface of agricultural area. An innovative system that deploys the Android operating system was used for surface measuring. The advantage of this system is the fact that its construction requires a minimal amount of hardware components, as control and monitoring are carried out over a smartphone. In comparison with competing systems this system is less expensive. The application integrated in a smartphone allows for geographical recording of agricultural site locations. Site surface, crop that has been planted or harvested on the site, and the time of working on the site are recorded for each site. The data are statistically processed, so insight is gained into the total number of sites, overall surface, average surface and individual crops on each site. Statistical data can be wirelessly transferred into a Windows application that allows for the creation of reports.