Worth the $

I use this app for ice fishing. I find that sometimes the contours and depths are spot on, and other times it completely misses, even within the same lake.

I do find that if I find a good fishing spot, and I place a marker in the app, I can get right back to that spot in the future.

I have the app for iPhone and my friend has it on droid, and I can zoom in more than him, so it seems to have an advantage on the iPhone.

Thatangler about Navionics® Boating, v8.4