iPhone GPS for Appraisers - GeoTagging Location / Photos

Ever been out taking rural comp photos and then want to accurately plot them on a map? Maybe one of the many iPHone GPS apps would be the key? They range from FREE! to $4.99 on up! Here's a couple that I've played with: Simple GPS This is great if you just want to know where you are, look at a map, and then send yourself (or someone else) a link to that location. It's super fast and easy. Cost: $.99 Motion X GPS Lite There are both FREE (Lite) and paid ($2.99 limited time offer) versions. This is a MUCH more full featured app that allows your to: * Track your performance * Share Waypoints and Tracks (up to 303) * Share Geotagged Pictures * One-click Facebook Shares * Live Navigation (compass) Have YOU found a good GPS app? Would you use these tools in your appraisal business?