Earlier quoted context omitted.
I think it's the opposite for me, using cash makes it way easier to get an idea of how much I spend. I use the ATM three times per month with 100 pounds each so 300 pound/month in normal expenses. With card I would need to to an addition of everything per month.
My credit card bill this month is £500, That seems easier than "i had n trips to the ATM plus I think I had £30 in my wallet from last month and I got £25 from donna for the booze we bought in France over the summer"? Not only that, I can download a monthly spreadsheet of all my transactions, pivot them into a simple table and so on and so forth. Data out the wazoo. £105 a month on tube fares. £235 a month on lunch.…
Changing the range changes what transactions are summarized, and what transactions are shown in detail below the graph. Clicking a graph category further filters and shows the transactions that match, with the graph changing to more specific sub-categories (rent, water, electricity etc if I click housing).
The categories are set automatically, but can be overridden or a transaction can be divided between several, and that remembered for future transactions.
I'm impressed that a bank produced this system!