GreenMeter computes a vehicle’s power and fuel usage characteristics to help drivers increase efficiency, reduce fuel consumption and cost, and lower environmental impact. Results are displayed in real time while driving, to provide instantaneous feedback, and can be shown with U.S. or metric units. Version 2.0 adds three new eco-driving efficiency displays.

Hunter Research and Technology has updated greenMeter for the iPhone and iPod touch to version 2.0. It’s available for US$5.99 at the Apple App Store.