Dorado
Keeper of San Juan Secrets
X2. I also have it on my phone and use it to target fishing spots, and do route planning. But I like having the graph on the console right in my face with shallow areas highlighted while running up lake!Navionics has a full functioning app as well. I don't even bother with the cards. You can use the app on a cell phone, tablet or computer.
Works great and is only $50.00 per year.
Love that it doesn't take up real estate on my fish finder.
Create your own routes, etc.
Free fully functional 2 week trial.
I wouldn't be on Lake Powell without it.