I know this is a bit late to throw my 2 cents in but I have some issues that I'm trying to get answers for. YES the app is GREAT on the EVO!!! the convenience of being able to cache any where, any time, is cool, but the big problem with the EVO is the battery consumption! and the Geocaching app tops the list at 95% of power consuming apps when I check to see whats using my battery. although I did not see a huge drop in battery life once I installed the app. Does it shut off when not in use or is it constantly running in the background? and can it be shut down without removing it? Anyone with better tech skills than I help me to understand this?