I use scoresaver 2 to record my scores monitor my performance. You can trial the system free for a month and its a one off cost of around £35 but if you PM SS2 it is hs baby and he can tell you more.
It is by far and away the most comprehensive tool for analysing your performance and for recording your scores and you can also include details of practice sessions, lessons and any matches you play in
£35? It should carry my bag for the round at that price!
For $20 I could have an application on my iphone to record my scores and stats on, which then automatically uploads them to a website for later viewing/analysis