ABSTRACT Suicide is a leading cause of death in the US and suicide rates have steadily increased. Despite this, there is a paucity of interventions that reduce suicide ideation and behavior. In this project, we seek to enhance a beta version of our suicide prevention digital therapeutic (developed in phase I) and conduct a randomized controlled trial to evaluate the efficacy of the digital therapeutic for suicide-related outcomes. This project will contribute to our understanding of the use of mobile technology as a suicide prevention tool.