This app was mentioned in 3 comments, with an average of 1.33 upvotes
here's the link to the Android app; https://play.google.com/store/apps/details?id=com.bungysheep.tech.fuelwatchnz
heres a link to the Android version. https://play.google.com/store/apps/details?id=com.bungysheep.tech.fuelwatchnz