Exceptions
If one of your bills is due for a different amount on a given month, just tap on the row in the Forecasting view and change the amount. The forecast will then be recomputed and the exception will be remembered for future use. If you would like to postpone a given item too, you can change the date in the same view.
If when creating an exception, your balance will hit zero at any date in the future, the program will notify you by showing the given date.