Here is a screen capture of the Wing Area Calculator on a 7" tablet that is effectively the same as a Kindle Fire. I can't get captures working on the Fire right now.

There is a shot of the same calculator on a Samsung Galaxy Epic phone.

I'm working on race management software that will run on the iPad (using MonoTouch), Kindle Fire, and Android tablets (using Mono for Android), but it is a ways out, not this coming season, at least not for AMA style racing.