I'm quite a fan of Windows Phone to be honest. I'll start work on a proper app for Windows Phone once I've upgraded to the consumer release of Windows 10.
Not that I know anything about development, but I highly suggest a Universal Windows Application, you'll knock out all Windows PC's, Tablets, Phones, and Xbox with more or less one swift blow.
Yeah that's what I'm planning, the current Windows app is more of a placeholder, I should be up and running with universal apps in 4 or 5 weeks.
Have you, as a developer, heard anything about the release schedule for the Snapzu API?
All I know is that it's being worked on. I've not made any direct inquiries though.