I like the look and feel of this product. I wish I could input a word where it says "Random", then press enter and have that affect the output in some way. To me, an interactive feature would add more WOW Factor to the product.
And since the iphone has touch input, you can spin the wheels with your fingers, they have some inertia and keep going for a bit. The flash one doesn't have any inertia when you are dragging.