i-Boating: Marine Navigation Maps Nautical Charts is an Android app developed by Gps Nautical Charts. It is a comprehensive marine charts app that offers offline nautical charts, inland river navigation charts, and lake contour maps for fishing, kayaking, yachting, and sailing.

One of the standout features of this app is its boat route assistance with voice prompts, making it the first marine navigation app to offer this functionality. It also supports Nautical Charts course up orientation and includes Tide Charts and Currents prediction for nautical navigation. Users can create new boat routes and waypoints within the app or import existing GPX/KML routes on their device. The app also has support for Marine AIS (NMEA).

With GPU acceleration, the app provides offline vector NOAA charts/ENC charts, ensuring that the text stays upright even when the device is rotated. It also offers lake depth map shading and safety lake depth contours, as well as HD 1ft/3ft depth lake contour maps for selected lakes, which are especially useful for anglers.

Overall, i-Boating: Marine Navigation Maps Nautical Charts is a feature-packed app that provides everything a marine enthusiast needs in terms of navigation and chart plotting. Whether you're a professional sailor or a casual boater, this app has you covered.