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We've seen a few stabs at smartphone-enhanced car diagnostics as of late, but many good solutions like Automatic Link and Delphi's Vehicle Diagnostics are primarily useful after you've parked. The upcoming Dash OBD-II adapter is certainly up to that side of the job, telling a Bluetooth-connected iOS device (and eventually, Android) about your car's problems and estimating fuel costs based on the gas tank's levels. Where it stands out is its usefulness while on the road: the custom app offers custom live gauges, including a Green-Meter for ideal fuel economy that you won't usually find in a real instrument cluster. There's even a dashcam mode that overlays travel details on captured video, whether it's to support insurance claims or just to immortalize a drive through the back country.