Big fan of GolfShot here. GolfLogix was great too but the interface was ugly. I liked the feature of editing your shots with GolfLogix. I also liked the drawings (as opposed to the satellite view). In the bright sun, it's easier to see the drawing view of the hole because features like sand traps and water hazards show up. All in all, the interface for GolfShot won me over, plus it's interface with the Paul Azinger tutorial that ties in to your game profile.
I also used to use Swing by Swing for iphone. Their dev team was very responsive, and they like adding features regularly. For example, they have a map view of your round that traces every footstep you take as well as an overlay of every shot you take. Cool to review your round with an overhead map showing each shot (club used and yardage).