Vaavud will unfortunately not work with Windows phone from the beginning. We have had several requests for this, and have even been contacted by a developer who has offered to build a Windows Phone app for us.
For now we need to focus on delivering on the iOS and Android apps, and get our manufacturing set up. But we will look into windows Phone as soon as we have the other things in place. Realistically, this will probably be towards the end of Q3 2013, but we can not guarantee it yet, as there are still many unknowns