Giving it one last chance
App was clumsy in terms of setting up initial starting mileage etc - so I had to fiddle it to avoid stats being out at the beginning. Second fill up went ok, third told me I’d got 129 miles when it was actually 263. I (try to) enter current mileage and let the app calculate miles since last full, but it threw such an odd result I was able to check and amend.
Going to give it a chance for another fill up but suspect I’ll be moving to something else soon