In certain low- and middle- income country settings, there is a disproportionate level of untreated postpartum depression that presents both acute and long-term risks to a mother's well-being. Although there is increasing willingness among health systems to involve non-specialists, such as community health workers, in the delivery of psychosocial interventions for postpartum depression, the effectiveness of these interventions has been mixed. The incorporation of digital technology, though, has the potential to improve the effectiveness of non-specialist-delivered interventions. The goal of this clinical trial is to evaluate the acceptability and clinical efficacy of the StandStrong intervention- a non-specialist, passive sensing technology-informed (i.e., digital) mental health intervention- as compared to a standard non-specialist mental health intervention among postpartum-depressed mothers in Nepal. Successful completion of the trial will contribute to the optimization of psychosocial intervention delivery for the postpartum context in low- and middle-income country settings.