In order to develop apps for Windows Phone, a developer needs (at least) Windows 8 and Visual Studio. I know, I know Windows 8 sucks, and that's why developers have been wary of writing apps (including Top Eleven) for Windows Phone. But I'm betting once Windows 10 takes off, we'll see developers flocking to that platform to write the apps that should have been there in the first place! I for one would love to see Top Eleven on my Windows Phone, that's for sure!