Wow, this could be really cool if you collected all the data from the cars anonymously and then built a data-set that mapped common car issues to mileage for specific makes/models/year combos. That could really improve car performance by predicting when issues will arise and warning the user (my 2002 malibu had a switch fail at 92k which is a common thing once I looked online, but this lead to more issues when it failed and may have been prevented if I'd replaced the part earlier).

This tool seems like a great idea. I'm going to get one when the android version is released.