HW can be described as between-session exercises where the client practices specific skills learned within-session in order to promote skill acquisition, which ultimately leads to improved acute- as well as longer-term therapeutic benefits on targeted outcomes, generalization of treatment effects and maintenance of treatment gains. Despite data demonstrating that HW is critical to achieving maximal benefits from evidence-based treatments, very little theory-driven approaches have been conducted focusing on improving the HW process. Through utilizing self-determination theory as a guiding framework and integrating principles from the field of "gamification" and goal-setting, the aim is to develop a two-component mHealth HW application (My MFG).