Incredible Value! – Boating USA GPS map nautical offline fishing chart Review

Four years ago I purchased a GPS Chartplotter for my boat. It cost $1,000 (US) and an additional $90 to buy chart data covering only the Western Great Lakes. Now with this app. I can get some of the same functionality covering the entire US for $4.99? Incredible! My chart plotter still has many advantages (4x bigger screen, many more navigation features, waterproof, etc.). But my primary needs (where am I, what hazards are near me, and what direction is my destination) are all provided with this app. Other favorable reviews understate the value of this app.
Review by Mr. Blue on Boating USA GPS map nautical offline fishing chart.