The app works using your iPhone's GPS to provide highly detailed maps and a robust suite of options to get you where you're going, even if you're offline for most of the US -- sorry, Alaska. We checked out an early build of the software showcasing its three modes for tracking, downloading new maps, and a library you can check back on. The maps feature hand-shaded topography for extra clarity and a unique "grid-mode" for downloading new sections, although it appears you'll be stuck there while you wait for it to finish. The software also pulls up points of interests and you'll be able to track your trips, allowing you to then view your statistics or even share the details over the web. Mophie's expecting to have these available sometime in October with full details forthcoming, but in the meantime, there's a brief demo on how it'll help you navigate your local trail past the break.
Mophie Juice Pack Plus Outdoor Edition hands-on