I know some existing banks do this and I found it really useful to save.
So at a scheduled time, either last working day of the month, on a set date, or set day weekly etc, you could sweep the existing balance of main account into a saving pot.
It’s a really cool way of putting the money you havent spent in a given month to savings before you get paid again.
At the moment I haven’t switched fully to monzo, instead I send a scheduled payment weekly and only use my Monzo card to help control my spending. So in my example I’d use it every Sunday to sweep any unspent money to a pot.