Smartphone Mechanics

Good thoughts.  Don't know how practical this is of yet,  but it maps out what standards and capabilities exist today.   A good starting point for using your phone as an automotive maintenance predictive device.   Also a good indicator of what you need for other systems.

Your smartphone: The mechanic in your pocket
You can use your Android or iOS device to gain access to a wealth of information about your vehicle’s operation.   ... By Michael Connell, Computerworld