Which geocaching app do you use?

Assuming that most of us now use smartphones for cache chasing, which app do you use? I have the Geocaching software, but I tend to use the c:geo app (Android) most of the time, an open source freeware that uses half the memory of geocaching. I find is cleaner and simpler to use and so far bug free.

http://www.cgeo.org

 

I tend to avoid using my moby and rely on my Garmin instead, but on the occasions when I've forgotten to load caches onto it, or forgotten to charge it, and I have to use the phone, I use c:geo