To refine a novel intervention using a combination of a smart phone application with best practice psychotherapy for men who have presented to hospital with intentional self-harm. The outcome will be change in baseline of scores on a depression rating scale the PHQ-9 at six weeks. Moreover, the investigators will ask clinicians and participants about the acceptability of the intervention and the acceptability of using routine data sources as outcome measures. This will inform methods of recruitment for the larger cluster randomized controlled trial and the creation of a treatment manual.