yet another which gps thread.... in GPS technology and devices Posted March 30, 2015 I have never used a smart phone for geocaching, don't even have one. My suggestion for a GPS is to shell out the bucks and get a good one. When you project the cost over the life of the unit the price becomes a minor factor. I have used a Magellan Explorist 610 for four or five years and I am completely satisfied with it. As far as smart phone geocaching. I attended an event a while back where one of the reviewers gave a talk. He said if you want to search with a smart phone, that's OK. But he was very adamant that you do not use a smart phone for placing geocaches. They are just too inaccurate. An analogy: Don't try to haul two tons of fertilizer in a one ton truck.