CalTopo is the new King in town when it comes to an app for gold prospecting and metal detecting!! It has dethroned TouchGIS in my book. CalTopo's best feature is integrated LiDAR (called Shaded Relief) along with a large number of useful base maps and overlays. The free base version of CalTopo is very powerful but if you want additional features the various paid levels of the app are all reasonably priced compared to similar apps like TouchGIS.
https://caltopo.com/map.html#ll=37.54458,-78.13889&z=10&b=mbt
With it you can begin to make your own gold map that will help you find more gold!
Check out my website for the Document library for Virginia Gold Docs:
https://theprospectinggeologist.com/v...
Check out my website for LIDAR overlays for google earth at:
https://www.theprospectinggeologist.com/
Music from https://www.bensound.com/