A DemocracyMap demonstration app has been submitted to NYC BigApps. You can see the submission and vote for it on the NYC BigApps site listed as DemocracyMap NYC. Since the app can’t be changed while voting and judging occurs, a separate copy of this app was created to display the latest updates. This can be found at: http://beta.democracymap.org
The app includes a mobile stylesheet, so it should also be easy to use from the web browser on most smartphones.