We love our cars. We love our smartphone apps. Torque (free+), an app that measures all the driving data your heart desires, is the perfect marriage of the two. Essentially an OBD2 (On Board Diagnostics) tool, Torque provides data such as mpg and fuel usage, GPS (with HUD mode) and essential vehicle data like fault codes and descriptions, all in a customizable display on your Android phone.
The app communicates via Bluetooth to an ELM OBD2 adapter (which you can purchase separately for next to nothing) that connects to your car’s OBD2 system. You can even clear OBD faults and check engine lights (no more electric tape needed to pretend it’s not there). The Pro version adds more features, including route and map data storage, brake horsepower, torque and 0-60 and quarter-mile times. Just make sure you keep your eyes on the road, rather than checking to see how quickly your hand-me-down econo-box roasted that guy on the recumbent bike.