Danno,
I've never used the fire, but would assume it's fairly user friendly and similar to most tablets. I use hivetracks and have both an iPhone and iPad, but have never actively tried to enter stuff while in the yard. Instead, what works for me is I use the audio recorder on my iPhone, in between inspections moving from hive to hive I'll record a brief snippet recapping what I observed in the previous 1,2, or 3 hives. Later, whenever time allows, I'll play them back while sitting at my PC and make my entries into hivetracks.