Excellent ideas, I will look into these other calculations, if they are too involved, I can't imagine many people would end up using a mobile app to do it, but things which require a little bit of thought and a few variables which can be entered on the fly are great candidates. Will let you...
I recently released an iPhone app called CreditTime for a prosecutor who continually has to determine a person's days served and then determine their "good time" credit which varies from state to state.
This app allows you to enter one or more date ranges and to set a credit factor and then...