Source for the GasPumpr iOS and Android app
Also see http://gaspumpr.com and the source at: https://github.com/jeffsheets/GasPumpr.com
Answering the questions: Is ethanol worth it? Is E85 worth it?
Optimized for mobile use while at the gas pump.
An ethanol (E85/E10/E15) flex fuel price calculator and value comparison tool.
To see it in action, install the Ionic View app from the app store and load the app with ID 7e1f5b2d. Not yet published on the iOS App Store. Soon to be published on Google Play and Kindle stores.