Turn on automatic mileage tracking based on motion detection

Have the app detect when you're driving so it can automatically turn on GPS to track mileage
Have a Bluetooth device to automatically track trips (by detecting when you enter/exit a car)
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Ie like driversnote. Which begins gps tracking once it detects your phone moving . At set speeds so as to trigger when your obviously driving or being driven . Not just walking . Or they also offer a version where you use a Bluetooth Beacon that remains in the car and handles recording a trip based on data detected from the ibeacon. I speak of driversnote. But the idea is not there's and thete are plenty of other examples. Basically finish off your trips application using gps to catch the data for each trip

keywords: automatic mileage tracking, auto trip, ibeacon