One of the most fascinating things about health apps is the process of selecting them: defining the need, determining how to search and which search terms to use, deciding which to consider, and deciding which to try. Having thought a lot about health app search, I was thrilled to have an opportunity to talk about the broader issue of mobile health search in a session at APHA12 on health information seeking. My presentation first argued that it is almost impossible to focus only on laptops and desktops when considering health information seeking given the preponderance of mobile devices. I then talked about what mobile devices provide health seekers: immediacy and access; affinity; multiple methods of input/output; and context. For instance, I spoke about the role of the contextual information people see, hear, feel, and remember and how that impacts search; and external information and data from sensors, such as weather, location, time of day, and blood pressure, impact personalization and tailoring. I also talked about how the impact could be huge if public health had the resources of retail for the use of big data and predictive analytics.