I really like the layout and design of this app. Everything seems to work so far. I would have liked to see a lot more detail stored for each vehicle, that said it does have a Notes area for each car which almost makes up for that. After purchasing the pro version I was disappointed that there was still one thing left to buy. Having a Pro version available implies that upgrade would give me everything. That it does not should be made clear in the upgrades area.
A feature I would love to see as an add on to this app, not as a separate app, is trip planning and execution with trip costs, etc.
I have no other complaints and I will post another review after having used this app for a year or so.
Update 2016/09/09
This program seems very stable after running about a year or so. None of the new features I was hoping for have appeared. Wasnt expecting them to but was earnestly hoping.
That said, it really is a beautifully designed app and I would recommend it.
NightRiderGP about Fuel Monitor Pro, v3.5