Let me restate the question. Does anyone know of a good app for iphone that shows the compleat great loop river systems on it. I got the charts &tides app. But it only does the coastline does not include Mississippi or Tennessee or the tenn tom systems thanks again.  Bruce

There are several for a fee.  Garmin, Navionics, SEAiqJeppensen, .I have cruise most the western rivers and very much favor Navionics for it's rich detail(depth contours, and unnumbered bouys) not displayed on the others.   I don't know how and from where they get this info but I have made good use of it on our last years run up the upper Mississippi.  If you have any app. that can display the USCOE enc s-57 format chart you can download them for free.
Joe PicaM/V Carolyn Ann GH-N-37
AGLCA life & Platinum looper(3),  MTOA 3813currently docked and cold in New Bern, NC.
http://carolynann-n37.blogspot.com/
joseph.pica@gmail.com