(Update 05-13-2011) Released. Free for a limited time. Here is a link to the iTunes App store.
(Original) This is to address one problem posed by a user in the iTunes app store review. Basically his (her) comment is that the iteration approach (try and error to get desired coverage ratio) takes too much work.
I think the comment is a good one, and here I am making the “auto pilot” option available (the default is OFF). It works like this, in “setting”, the user turns on the “auto pilot” switch. In the “calculator” tab, when the user hits “calculate”, the user will have 80% coverage ratio, and the “saving annually” text field will have a value that achieves that 80% goal.