Our article uses case studies of two civilian emergency response mHealth apps—PulsePoint and OD Help—to theorize the ways the mobile mapping functionality embedded in these tools, which is integrated with the Google Maps platform, enables yet also constrains users’ agential practices. Using an interface rhetoric approach, we unpack assumptions related to the embodied contexts of use facilitated by this functionality within the unique scenario of civilian emergency response. We argue that interactions between and among humans and these apps’ mapping interfaces involve complex, negotiated, contextually situated enactments, which align with a posthumanist perspective toward agency. At the same time, these interactions may also inadvertently amplify the precarity of vulnerable groups. Better understanding the ways that mobile mapping technologies shape agential enactments, particularly in ways that affect precarious and dispossessed populations, has important implications for the design of mHealth technologies—and the users who rely on them—moving forward.

We argue that by using existing data and sharing research in a databank, RHM scholars can practice a research habit that conserves and optimizes intellectual and institutional resources. When possible, by using existing datasets, scholars avoid data waste, that is ignoring or bypassing existing data. The data distinctions that we call attention to—derived, compiled, and designed—account for various ethical and rhetorical concerns regarding privacy and confidentiality, expected context, and consent. Equally important to the aforementioned data deliberations we explore, collecting and managing shared RHM data in a databank, while possible, are not without ethical, logistical, and rhetorical difficulties.