i-Boating: USA Marine Charts

i-Boating: USA Marine Charts is a marine chartplotter for iPhone and iPad that delivers detailed US nautical charts and freshwater lake maps. It includes NOAA vector charts (ENC), USACE inland river maps, and bathymetry where available, plus course Up orientation, voice prompts, and Tide & Currents predictions.

Key features include GPU-accelerated vector charts, customizable depth and distance units, GPX/KML route import and editing, route creation and sharing, auto-follow with real-time track overlay and a predicted path vector, and the ability to plot and manage waypoints. Note: continuous GPS background usage may impact battery life.