Navionics Boating Marine & Lakes
What it does: You get basics like tracks, routes, markers, distance, weather, tides and currents. It is the advanced features, though, that make this app so appealing. Fishing Ranges displays up to five depth ranges on SonarChart so you can hone in on productive fishing spots. SonarChart Live allows you to create 1-foot HD bathymetry maps in real time as your boat moves along the water.
Why you need it: Sure, you can find the basics elsewhere but not with the reputation of Garmin’s powerful technology that is crammed into this app. With the one-year subscription, you can download chart layers for offline use, get daily chart updates and dock-to-dock autorouting. The ActiveCaptain Community crowdsourcing adds points of interest, like hazards, ramps and marinas.
What it costs: The app is free with a slew of upgrades available for creating customized add-on modules.
Where to find it: In the App Store for iOS devices or Google Play for Android devices.