Years of waiting and testing others, MapIt has turned out to be the most promising app for mobile data collection and GIS integration for me. It is elaborately designed with a broad vision. Individual purchases of extensions for little costs is a plus, so that you can tailor your needs with minimal expense; Besides MapIt is best value by far within equivalents.  Developer is hands-on, kind and open for communication. MapIt is strongly recommended to anyone collecting data in the field and familiar with GIS.