oobgolf also have an iphone app that let u enter the score. It's called Scorecard I think.
Now, I record my score plus other info like in fairway or not, how many penalty, how many putts, what clubs was used...then I record them in oobgolf.com and I can track the performance over time. Used it to track my son and myself scores and it is pretty interesting. For example his fairway percentage is high compared to mine but my average putts are better. However both GIR not go good but have been improving over time. Just started using oobgolf for a few months.