It would be cool if we could add expected expenses (for example monthly/yearly fees, Online-Purchases that will be booked in a few days etc...) so that we could have a better oversight over what to expect in this month or the next few days - and perhaps have the opportunity for bunq to give us a heads-up if a scheduled expense is going to fail due to missing funds on that sub-account.
Those "planned expenses" could then also work towards an even better balance prediction