There are two of these that I can tell: MPG and CarStat. MPG is more popular, but I have a feeling that's because it's $1 less. Anywho, does anybody have preferences yet? I used Miles from the Web Apps to track my mileage, and it was OK (considering it was free) but left a lot to be desired. I couldn't STAND not being able to edit anything once I put an entry in. I downloaded both of the above apps, and CarStat seems to be a lot better. The only "downside" is Miles uses your trip odometer reading (like 250.5 miles) whereas CarStat uses the odometer reading (like 35000 miles). Therefore, I'm gonna have to do some math to put everything in CarStat, but it looks VERY customizable. It also tracks maintenance, like the tires I just got and oil changes. So any opinions?