Re: Best iPhone golf GPS App?Another vote for golfshot here. Battery life is a little bit of an issue, but I've learned to actually lock the phone after my approach shot, so that it doesn't keep the GPS active while getting to the green, waiting for playing partners to get on the green, chipping, and putting. Then I turn it back on to enter my score, and by the time I'm ready to tee off on the next hole, the GPS has fully reconnected to the point where it's accurate again.
The courses I've played with it seemed to have been entered very accurately, and the GPS signal itself is quite accurate. The scorecard is easy to use, and tracks statistics well. It will automatically email the scorecard to your playing partners if they're in your contacts, which I thought was cool. Overall well worth it.