I was a little disappointed with this app. See video below for what I feel a dice app should be (shake phone to roll, nice graphics, many choices for dice graphics):
http://www.youtube.com/watch?v=zvUeglJ0qVc
dupplicate should be spelled duplicate. I believe that the plural for dice is die. I think dices is a verb. I wish that there was a choice to view the 6 sided as dots and not numbers, like you normally see in games.

Very good. It does exactly what its supposed to do.