MotionX GPS

MotionX GPS transforms your Apple iPhone into a full-featured handheld GPS receiver, perfect for many outdoor activities including walking, hiking, and geocaching (see my recent blog post regarding geocaching). MotionX GPS is very well documented, unlike many -- if not most -- apps. Available resources include a user manual (PDF), online interactive tutorial, video tutorial, and a list of FAQs.

I give MotionX GPS a rating of four-out-of-five stars. My only criticism is two-fold:

1. “Images captured for photo waypoints will be saved at 640×480 for improved performance (~10% of the full resolution for the native 3GS camera app, or 15% of full resolution for the 3G).” (MotionX GPS User Manual)
2. Photos taken using the camera feature of MotionX GPS do not include geotags embedded in the EXIF info.