IHikeGPS was awesome before and the Feb 2013 upgrade is even better. Stitching maps is a great new feature if you want to see your whole route, and the help pages are now complete and easy to follow. I use the app for bike commuting, and its most useful to see where youve been and how much up and down youre doing on the different routes. You can easily export tracks to Google Earth and see them in 3d if you want. I love the trusty old USGS maps, and this is a great way to carry them in your pocket wherever you go.
Espantaguest about iHikeGPS : Classic Topo Maps, v4.0