I have Navionics on the phone, but if I am driving out I use one of the units from the boat. I bought an adapter to plug in my Lowrance unit in the power output in the truck and stick it on the dash. That way I have my waypoints and a tracker line to get off the ice in white out conditions (that part alone has helped a couple times).
I used to run the Navionics on my old phone but I never upgraded from years ago. I mighty install this again on my new phone but wanted to see if there was anything better. I liked the Navionics so guess why change.