Scott Danforth.. I guess your living up to your slogan "grumpy old guy"
I haven't used any apps because we are on a lake, but if your boating in larger bodies of water there's an app called Wave boating which may be worth checking out. I haven't used it but I know it's loaded with nautical charts and easier to read then nautical charts
I have had multiple boating classes
I have been behind the helm of boats for almost 50 years now (since dad let me drive the family's old Dunphy )
I have a real dash mounted GPS with down view and side scan
I have a hand-held sun-light readable GPS that floats packed in the ditch bag as a backup to my primary GPS
I have a compass on the boat, because GPS direction doesnt work when you are going really slow (like in the fog or heavy rain)
I have a second dash mounted depth finder because one could fail.
My boat has a mounted VHF radio
I have a hand-held VHF radio that floats packing the the ditch bag as a backup to the boat mounted VHF
I boat in Florida's Gulf Coast, so trying to read a phone screen is not only dangerous at 50mph, its also impossible because there isnt a sun-light readable phone. try shielding a cell phone with one hand, hold it in another while zipping along and dodging boat traffic
I boat in Florida's Gulf Coast, if the phone is in the sunlight for more than 5 minutes, it goes into overheat shutdown. as compared to some friends phones that just have the screen explode
I boat in Florida's, where there are not enough cell towers for the amount of cell traffic when I am close to civilization because there are too many millennials taking pictures of their face and their food and posting to facetube and instatweet
I boat off-shore in Florida, sometimes well outside of the reach of a cell tower
Before Florida, I boated in Lake Michigan, the bay of Green Bay and many many lakes and rivers all before owning a cell phone
I wear Grey polarized sunglasses to read the bottom (When driving, I wear yellow or brown polarized sunglasses)
I can navigate at night by landmarks
mostly where I boat, there are signs that state "do not rely on charts, local knowledge required" because the channels change with every tide.
I found that out the hard way more than one occasion
When I travel, I am usually in locations without cell coverage. I have printed maps, a GPS unit and a compass.
so tell me why I need to check out an app on my phone that is nearly useless unless I am in shore close enough to a tower to get signal. The purpose of being on the boat is to get away from the phone
If you must rely on an app to tell you how to boat, you have lost.