Disaster management requires a variety of innovations to intervene or prevent the adverse effects of the disaster, including through various applications made for various purposes and uses. One of the applications is the Jaring Bencana, to strengthen the mitigation aspects of natural and non-natural disasters, including environmental disasters. This study aims to examine the level of usability in disaster applications by measuring the variables of effectiveness, efficiency, and user satisfaction. The method used in this study is usability testing with technique performance measurements and retrospective think-aloud. Respondents in this study 30 individuals as test participants, were selected purposively based on criteria of interest and responsibility in disaster management. Results from testing usability show that mark component effectiveness is significant at 89%, mark efficiency component of 0.24 goals/second, and satisfaction score of 68. It can be concluded that the Jaring Bencana application has been functionally effective and efficient, although it must be optimized to achieve maximum user satisfaction. The results of this research have implications for the development of disaster applications that are in accordance with disaster needs.