iGIS is the world's first and leading iOS GIS application, offering true GIS functionality on the iPhone. Users can easily load, view, investigate, create, and export their spatial data over map service imagery backgrounds. Importing data is seamless with unique facilities for USB, wireless, Mac, PC, or Linux connections. Supported formats include raster data and ESRI Shapefiles (.shp). With data stored on the device, iGIS operates offline, ideal for fieldwork. Featuring support for over 3000 projections, the app allows users to work without the need for re-projection.

The app includes support for multiple layers of points, lines, polygons, and imagery, all customizable. Users can add comments, edit layers, and export to ESRI shapefiles. Additional features like multi-threaded map rendering, large dataset support, GPS location display, zoom functions, customizable drawing styles, layer visibility settings, and feature attribute interrogation enhance the user experience.