Shipped
The fill-up form now requires one thing: your current mileage. The trip meter reading, gallons and price per gallon sit below it, and the total cost and date are under Cost & more. Everything except the mileage is optional.
You can also save where you filled up. The first time you log a fill-up, the app asks whether to store your location and explains what it saves: the location at the moment you log, and nothing in the background. You can change your answer in your profile.