The title is mostly a lie, since it doesn't calculate much. It just has the odds precalculated. It's ugly, but it has the information.

I just started learning Android development, and this was the simplest thing I could make. Since it's already done, maybe somebody else finds a use for it. I know I'll be using it to be very annoying while playing from now on.

The app asks for permissions for reading/writing on the SD card and for getting the phone status. I don't know why, since that's not specified in the Manifest.xml. It doesn't use those permissions for anything, either. I haven't figured the issue out, but I didn't (and won't) devote much time to it. I'll just keep reading the book, and fix it for the next app I make.