I've found 12, but have been with a friend of mine who uses an app on his phone. (not iPhone... Droid, I think?) I had a 3GS but it was stolen a couple of months ago, so I now have my old Blackberry Curve with no GPS, etc. I have a Garmin Nuvi gps in my car, but I seem to have issues with it getting me close when I'm on foot - the slow movement doesn't help. I'm considering going out and looking for a couple of geocaches tomorrow with it alone, mostly just to have something to do and partly to see how well it will work. I won't be going for any difficult caches, though.
I'll be getting a new iPhone in 2 or so months. Most likely I'll get a good app for it, but I'm not opposed to buying a handheld GPS. Problem is, I don't know one from another. I'd also like to keep the cost -somewhat- down. Any tips would be helpful. I can definitely see the drawbacks to using a smartphone, but with a good case/protection, frequent charging between long caches or an extra battery pack, I don't see why it wouldn't be enough. After reading a few posts here, I assume you can save the favorites and view them on the map WITHOUT having to have a signal? Or am I wrong? I used my dad's iPhone 4 to go look for a cache about half of a mile from his gf's house. Lots of woods, the app took me to a location right off of the road, but then I lost service and it quit. If that happens often to people, I'd prefer to buy a GPS instead of getting myself lost somewhere.
