Rollover Management system for bills that vary each month (like utilities) [edited]
I'd like to be able to set a monthly average amount for the bill. If the bill transaction is under the average, then the remainder goes into a "fund". The fund is used for the bills that go over the average amount. This is really crucial so that I have enough money for when the bills are much higher (gas bill in the winter for example).
Other budgeting apps have solutions for this, like EveryDollar and Simple.