I was looking for an iphone app that might have some nautical information/topo for US lakes.

 

Do you all have any experience with any? Any recommendations? Or even a site where you might be able to order prints...

Navionics has several versions of contour mapping for waters for mobile devices--smartphone and tablet.

I use three of them. Navionics USA, Navionics Boating, Navionics Boating HD in iOS and Android devices.

It is the same maps that are available with the mapping cards for marine sonar/GPS units.

 

If you want view the maps, go to the Navionics website and click on Web App--what you see is what you get with the above products.

I agree with wayne... I use the three Navionics apps that he does as well.  I use the Navionics Boating HD on my ipad, Navionics Boating with the USA and Canada on my IPhone, and the Navionics Boating app on the Android Tablet.  I like them boat I have purchased all the options such as auto routing, and the fishing mode option.   The maps update frequently with the SonarCharts layer which will get more and more accurate as time progresses.

I will be checking this out then!

 

Thanks!

Navionics is definitely the way to go on a phone or tablet.  Now you can pair it with certain marine electronic for real time mapping.