I've given up on the app. I recall a post on this site stating Fuelly had purchased the app (or the app purchased Fuelly). Either way it implied that the 2 were correlated.
Nonetheless, it crashes all the time and just takes longer to get into than using the mobile links I created on my home screen. Also it doesn't report back your MPG stats at the fill up. Something the mobile site does.
I've sent a few feedback suggestions too, but I haven't received any feedback or seen any updates.
I had the same impression, that Fuelly had purchased the app, and would thus be the source to which to complain. The app started working without crashing for me a couple of days ago. No update to the app, just started working. Perhaps give it a try again?