Source: PRESS RELEASE, 2/10/12 

USDA NRCS is excited to announce a new smartphone application, or “app,” is available as a free download for both iPhone and Android users to access soil survey information. The app, SoilWeb, combines online soil survey information with the GPS capabilities of smartphones. SoilWeb for the iPhone is a portable version of our online interface to USDA-NRCS digital soil survey data. The application uses the GPS built into the iPhone to acquire your current location, and then submits an HTTP request to our server via the SoilWeb API. A graphical summary of the soils mapped at your current location is presented on-screen, with links to details through our online soil survey, or via the USDA-NRCS official series description (OSD) archive. SoilWeb for the iPhone can be downloaded free of charge from the iPhone App Store. 

Click here to access SoilWeb.