This document describes a mobile phone app intervention designed to improve the wellbeing of young males aged 16-24 through developing healthy sleep/wake practices. It involved cross-sector collaboration and participatory design methods including iterative testing cycles. The primary aim was to address common mental health disorders affected 26% of Australian youth by targeting sleep disturbance, a risk factor for mental illness, shown to negatively impact mood, cognition and health. Results of feasibility and randomized controlled trials will evaluate engagement and effectiveness.