The ArcGIS App is a great utility for accessing map content hosted from ArcGIS Online. With the ArcGIS App I can view and edit GIS data from my iPhone or iPad, use the integrated GPS to collect features out in the field, and even take a picture and attach it to features stored in ArcGIS Online. I hope this App will support offline data storage in the future for times when disconnected editing will be required.
CA---> about ArcGIS, v2.3.2