Meet Optio Fuel: a smart wireless fuel sensor that mounts in your engine room and fits into your fuel line to help you make your boat more fuel efficient. It provides you with consumption and range information on your iOS device. Optio Fuel calculates the highest speed you can go for the least amount of fuel and displays it on your smartphone.
Optio Fuel installs in minutes and has a battery that lasts up to a year. It transmits fuel consumption data to within 2% accuracy. More information is available on Kickstarter.