Developing a Mobile App to Prevent Suicide Based on a Software Development Life Cycle: Application of Ecological Momentary Assessment and Interventions.

To improve mental health, diverse mobile applications (apps) have been developed to target those who actively use smartphones and in-phone apps. In this vein, this study developed a mobile app, eRAPPORT, to prevent suicide using ecological momentary assessment and intervention. A brief literature review and mobile app market search were conducted to determine the app's content and modality. The design and contents of eRAPPORT were developed through consulting with contextual and methodological experts for end-users' need assessment and technician review. For implementation, an experienced mobile app developer collaborated with the research team to create the app, which includes a safety plan, a feature to track suicidal risk and mental health status, evidence-based information from international and national authorised organisations, an outreach service with online/offline counselling and pop-ups displaying emergency contacts. Twenty-five general adults participated in the feasibility study. After using eRAPPORT for a month, they completed a self-reported questionnaire, followed by an in-depth interview of functionality, acceptability and safety. Both quantitative and qualitative evaluations assured the moderate level of usability and acceptability due to some features that should be improved before applying those with a high risk of suicide. No critical adverse event was reported. Thus, this eRAPPORT feasibility study provides fundamental information to describe the patient-centred processes on how to develop a mobile app for suicide prevention. Further study will be conducted to test the app's effectiveness and determine the application in clinical practice for monitoring and preventing suicide risk by collecting real-time and longitudinal data.