I've been looking at iPhone apps for timing laps.  So far I've found two that look good, TrackPro and Harry's LapTimer.  I'm wondering if anyone has experience with either?

http://itunes.apple.com/us/app/trackpro/id339601945?mt=8

http://itunes.apple.com/us/app/harrys-laptimer/id307688598?mt=8http://itunes.apple.com/us/app/harrys-laptimer/id307688598?mt=8#

Harry's LapTimer looks like the better deal.  It seems to have pretty much the same features as TrackPro for less money.  I also like the traction-circle displays of Harry's, although the lap-comparison features of TrackPro look like they might be superior.