Calculator HD is a great free finance calculator that takes advantage of the iPad's large screen and support for four orientations.
DOUBLE ZERO: enter double zero once
LARGE: uses the whole iPad display to leave cramped buttons behind.
EASY: perfect for a quick calculation, powerful enough for pages of them.
TAPE: never lose track of what you've entered.
AUTOSAVE: holds your calculations and tape in place for the next time you return.
Sound Effect: when you click the buttons there is a audible feedback
Calculator HD is ad supported.