I have to disagree, before Monzo I used this app called OnTrees and it was pretty bad but it had one cool feature. You knew exactly if you were spending too much in a specific category depending on the day of the month it was.
(Terrible design but…) As you can see on this screenshot I’m doing good in clothing, really good in travel but very bad in Entertainment and Restaurants. And I know all this information straight away.
I know that Monzo has the whole green/yellow/red but I feel its not enough, by simply moving the bar to the left you can see how any category is doing compared to your overall target.