My good pal RedCraig over at the Blog of Grudges has been beavering away on a little project he'd now like to share with you all. You can check it out here.
As the man says: I MADE A THING. Fantasy MathHammer, an android app. Get it here. It's free, and has no annoying pop up advertisements. It simulates combat between units of your choice, and lets you know the result of 10 repeated combats.
Give er a whirl.