Used to be a decent app...
Not sure what has happened, but Gas Cubby seems to have been acquired by Fuelly, and as new versions of IOS appear, and people get new phones, the syncing across devices has stopped working. There are parts of the interface that dont seem to work. The process and instructions for fixing things when you have problems are unrealistically complicated, requiring you to download applications to your Mac, explore through files, etc. No longer worth it to pay for this app.
Mark in PDX about
Fuelly: MPG & Service Tracker, v2.7.5