NStream alternative for Windows Phone users

For any Naim streamer users who happen to have a Windows Phone device rather than an iPhone, I have found a great UPNP control app called "AV Remote".

While this does not replicate nStream entirely and doesn't cope well with playlists, it has one surprising feature - fully working reading and control of my Qute's volume level.  I am not sure how it is doing this as I had understood volume control to be implemented outside of the UPNP spec?

Anyway, it works well enough to justify its £2.99 tag.