Kenneth Koh is a travel and adventure writer, photographer and former airline pilot who has been using MotionX-GPS. Here is a short piece from his blog.

Another Reason To Buy An iPhone

Need another reason to buy an iPhone? How about because of its GPS capabilities?

I’ve been mulling over whether to buy and iPhone 3g or iPod Touch for surfing and emailing at wifi hotspots while travelling, and one reason that might swing me over to getting the iPhone instead of the Touch is because of its GPS capability. A GPS is only as good as its software and MotionX-GPS has been getting some good reviews.

Here’s a good review by Navigadget.

You can read more about it at the MotionX website or download the app at the Apple App Store. There is also a free version that you can try out, the MotionX Lite, but that comes without a Heading/Track Up display and will be less practical to navigate with. Personally, I’d just spring $2.99 for the full version.