MobileMiles is simple web app for tracking fuel mileage and other statistics straight from your mobile device. Every time you fill up, simply enter the number of gallons pumped and the unit price, tap submit and you're set! The legacy version is available at gas.randomland.net. The in-development 2.0 version is available at mobilemiles-ui.herokuapp.com.
MobileMiles provides a simple HTML interface to a "fill-up" list (version 1.0 stores this in a Google Drive spreadsheet, version 2.0 uses a database). The following stats are viewable from the web interface:
The "stats" sheet gives you a historical look, calculating these at 30- and 60-day intervals as well as an "all-time" column. These advanced stats are calculated, but not currently displayed:
The entry form will autofill most of the form for you with "guesses", saving you time at the pump. The autofilled fields are: