The project is based on using mobile devices to track the expense of products during the application of these ones with an agricultural tractor. This is achieved by recording params like gps positions and velocity of tractor. What products to apply and their dose are initially load in the mobile device from a server where the treatment recommendations have been generated previously with a web application or from the GIS Application.The obtained results in the mobile device are sent to a server using Sigfox Technology and are shown in a gis web application. The GIS helps visually to understand the areas where protection plants products are applied linking visual information with the real data collected in the field. All this helps to improve the cost control.