iGasLog
This application is designed for the Apple iPhone/iPod Touch. Please note that it is programmed and entirely marketed by iMobileMedic.com . It appears to be very robust and reasonably compatible, allowing cases to be moved back and forth between the iPhone and desktop PC or Mac logbooks. Support is provided by iMobileMedic.com (not RCoA).
For links to this logbook software go to www.imobilemedic.com