[pct-l] Advice for iPhone apps?

[Clark Miller]

Any advice out there for the best iPhone apps useful for a 2011 thru-hike on
the PCT?  I remember seeing various suggestions in other subject lines
sometime back, but haven't managed to locate them.  Topo maps, GPS,
downloading Half-Mile's waypoints to iPhone.  Any advice would be
appreciated.  Looking forward to meeting many of you on the trail or at
kick-off.