The HidroWeb mobile application is an integral tool of the National System of Information on Water Resources (SNIRH, http://www.snirh.gov.br/) and allows access, in this first version, to telemetric data collected by the National Hydrometeorological Network ( RHN), gathering data levels and flows of rivers and rains throughout the national territory. It is an important tool for society and public and private institutions, since the data collected by hydrometeorological stations are essential for