The emergency of the Covid 19 pandemic has led technology to seek solutions to the different
problems caused by the disease. In the monitoring area, connected devices offer new
possibilities to a rapid detection and intervention of the new cases. They allow remote
diagnostic to infected patients with covid 19 symptoms. However, the heterogeneity of the
platform requires applications' developers to develop specific solutions for each platform. In
this paper, we propose a cross-platform application that permits developer to use one code to
build applications in different platforms. The paper describes the architecture of the application
by presenting its three parts: interface screens (UI), data manipulation and authentication
implementation. Finally, we show selected screens of an android release as an example.