Naviational APP for the east coast. What are you using??

[STVmod]

what do you guys around the coast use for a tide chart/navigational app? looking for something to use for the depth charts and when turned on will track my course so I can come back in the dark with limited trouble.

Thanks in Advance

[Mr. Demeanor]

Navionics for anywhere in the country. The app is $10 and better detail than the big plotter in my fish boat.