Switch fill up units on-the-fly - heading back across the border and dreading it :-(
A simple way to switch between Imperial and Metric data entry is required.
A few years ago I did a 14 day motorcycle trip that was in both Canada
and the USA. It was a real pain to convert US Gallons and work out price
per litre manually with a calculator to enter into Fuelly.
My odometer switches at the push of a button between miles and km so I could easily
enter my odometer in miles and fill up in gallons if Fuelly allowed me to
switch units on the fly and select a currency.
The problem with going in to my profile and changing units is that the whole database is converted with considerable loss of accuracy such that when I switch back after my trip across the border, my original data is lost due to conversion and rounding errors.