Postpartum depression (PPD) is a prevalent mental health issue among rural Ethiopian women. A mixed-methods approach was employed, including focus groups and user testing with 150 participants. The app received an average satisfaction score of 8.2 out of 10 from users. The mobile health app shows promise in improving support for PPD among rural Ethiopian women. Further research is needed to assess long-term efficacy and cost-effectiveness. Postpartum Depression, Mobile Health App, Rural Ethiopia Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.