Join Date: Feb 2009
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I have the Navionics App, and it works OK. On my phone (newer 3G) its still a little slow for chart details to fill in when moving across screens, which is frustrating. I would use it only as a back ups-back up, and in a pinch. The battery life is too short on the phone for practical nav use. Maybe there is a setting I can change but it also stops navigating when my phone goes to sleep after a minute of non use. Seems limited by the phone. As others have said, the screen is small, but if you use a hand held, its not much different than that.
I use it mostly on land when thinking about a trip or planning one (or if bored someplace) but I would not navigate with it unless I had too. The marina info is handy. I also like the waypoint function as its a quick and dirty way to measure distances between points/marks/etc.
Its also not weather resistant at all, which can be a problem ...and costly if you drop it. Its definitely not a nav system (yet) with this app. I like to check weather radar and other things on the water, but not navigate with the phone.