Intimate partner violence (IPV) has well-documented adverse impact on survivors and their children. In this article, we describe the development and formative evaluation of a trauma-informed, user-friendly Smartphone-based mobile application (app) to address the unmet health needs and improve the well-being of mothers who have experienced IPV. A multidisciplinary team of IPV experts developed the app (called Thrive) in partnership with software developers. Thrive includes three sections: Myself (maternal self-care, stress coping skills), My Child (stress signs in children, talking to children about IPV, mother-child dyadic communication), and My Life (hospital- and community-based resources). Sixteen providers (social workers, IPV advocates, and health care providers) and eight IPV survivors provided feedback about Thrive via structured interviews. Participants found Thrive to be user-friendly, informative, trauma-informed, and a potential alternative to handouts. Participants had several recommendations including allowing users to add their own content and providing social support mechanisms. Initial feedback sessions have demonstrated preliminary acceptability of one of the first health education apps for mothers who have experienced IPV. Next steps include revising Thrive based on user feedback, testing Thrive via a longitudinal outcome evaluation, and working with hospital and community-based partners to disseminate Thrive to IPV survivors around the country.