Anyone have the navionics phone app and do the update to sync to your fish finder. It advertises that you can download the updates to your unit via phone. I've got the dragonfly 4 pro with the navionics pack but haven't updated it since I got it in march because I don't have a laptop so this would be nice to figure out. That and I use both some times like when I pre fished a lake in my buddy's boat I ran the tracker so when I do my tournament in they kayak I have all the waypoints. 

Sorry, can't help with the syncing, but can say that my phone has updated and so far I have not noticed a difference between the mobile devise and my Lowrance system.  It has only been a few lakes, but zero difference 

I wish my one lake was on it. I have a paper version of the contour map of the lake that you can buy in Walmart that covers NY lakes. However navionics doesn't have it in heir system. I've got some way points saved when I've passed over structure I want to come back to though.