I've been using aCar for years to track my car expenses, mileage, repairs, etc. It works very good. I have several cars and this really helps to combine everything in one place. It would be pretty killer if my newly purchased Automatic Pro could take my car labeled "Camaro ZL1" for example and use the gas price per gallon I paid for the most recent fill up for my car labeled "Camaro ZL1" in aCar and use this when calculating the gas cost for my trips! Don't know if it would take some collaboration with the guys at aCar or not? You might be able to just have the Automatic app access the aCar app's database for the price? Don't know but do think it would be a cool idea!