This paper summarizes a system called “Taarifa” which is a location-based application built to allow citizens in communities to report public health, waste and other issues. In this paper the authors describe the Taarifa project from initial ideas until deployment. The paper goes on to describe the hackathon and the decision to fork the ushahdi platform. The effort won the London hackathon resulting in interest in continuing the effort and deploying in Uganda. It describes its initial experience in Uganda and highlights especially the issue of a lack of smartphones and also mobile connectivity problems that exist because some components of the app can’t function when offline. They note that new versions will try to resolve this problem. They close by describing how there is expanding interest in the app and the need now to more formally organize to continue to support the application. Overall, the paper is an interesting case study of the deployment of the app, but it is very descriptive and appears to have thought mostly about the technology rather than organizational issues around its deployment. There are interesting questions about potential uptake that are more social science questions than technical ones that are not really addressed here. Larger comments In the literature review section there is the point on “…but nothing to the experiences of using [crowdsourced] data.” I don’t think this statement is correct. There is a significant list of literature at Cornell University’s Citizenscience.org (see http://www.birds.cornell.edu/citscitoolkit/references) that might have some useful citations for you. I know too that there have been papers on ushahidi for example although I don’t know of them off-hand. I encourage you to dig a little deeper in your literature search. This is a paper that describes the evolution of an app to help in developing countries and describes some of the technical aspects of the app and its evolution. But technology can only go so far – there are a lot of assumptions here about implementation that require human and organizational infrastructure. There is little said about what kinds of data were reported in the Ugandan case and then how that data was used. Also, the data submitted must be reviewed somewhere – a backend database where the crowdsourced data is stored, but the paper doesn’t really describe this at all. I imagine some data reported may not have been very useful. So what happens to that data? Who reviews the incoming data and what process determines what is done with it (workflow)? And given it sounds like the app is very generic in what people can submit, how is that handled? Reporting trash needing to be picked up in a road might go to a different public sector manager from a report of a public health issue. And are the localities in Uganda capable of evening handling the response to these? It would be useful to reflect on these questions some in the paper. Good luck as you continue on this project and congrats on your progress. Smaller Comments In the literature section there is a number of ?? and strange citations. I can’t tell whether those are citations removed to conceal the authors or it they are incomplete references the authors forgot to fix. Also on page 4 – “Addref???” Where are Figures 1, 2, 3 and 4 you reference?