Scorekeeping Apps

Has anyone used a smartphone app to keep score at a baseball game?  I would love to hear people's opinions on ones they have used before.  From what I can tell there are three major apps people use.

• iScore comes from ESPN and also comes in a basketball version.  It currently is available for the IPod touch, IPhone, and Android phones.  
• Pointstreak K-Force is another option for those with Ipod, Iphone, or Ipads.  They make a pc program also to sort through all the data you collect on the go. 

• GameChanger is currently only available for Iphone/Ipod and Ipad but is working on versions for Android and Blackberry phones.  They just added integration with the popular MaxPreps site and also will be used during the Cal Ripken World Series.   

I currently dont have a phone capable of using any of these programs.  I would love to hear in the comments from anyone that has used on of them.  I am putting together my GameChanger scoreboard to try and have on my blog so let me know if you use that so I can add your team.