This app was mentioned in 1 comment, with an average of 6.00 upvotes
On a daily basis, I would probably say Nationwide (UK building society).
Unfortunately I cannot provide my own screenshots as it blocks them for obvious reasons. In my experience many banks have pretty terrible apps, in the UK at least. Nationwide doesn't even look that bad (considering it doesn't follow the material guidelines) but it is so terribly laggy to scroll and navigate.
And of course, there are no alternatives for security reasons too.