I just spoke with a Simon C from the Square help desks and they told me they had no reason to support any Windows Phone devices but if they had plans they would be sure to announce it. Here is a quote: "Hello Ezekiel, We currently only support Apple iOS and Android platforms. We don’t have any plans to support Windows mobile devices at this time. Should this change in the future, we’ll be sure to announce it. Keep an eye out for updates on https://squareup.com. Thank you for your interest in Square." I have heard a lot of very formal responses much like this which seem to say there is more going on under the surface. Anyway please help sign the petition and ask your friends to too!