I just thought of this idea, because I know that our Android phones have all the sensors we need. Because I developed this app :
My idea is about turning our phones into wands. It started with this idea. Of attaching our phones to a wand. So, if you want to play with a wand, you don't have to carry your phone in the other hand. I imagine you waving the wand around during the casting cycle. And you can still see your phone easily, in case you want to skip.