The Photojojo claims to work on anything with a camera. Based on what I've seen, I believe the claim. My only issue is that it requires you to attach the magnetic mount via adhesive, which (for me) is a non-starter. I'm not a fan of adhesives. They don't always stay on that well. Also, it only works with Photojojo lenses and filters. Finally, you need a separate attachment for using a tripod.
I would be more inclined to get the Beastgrip. First, it's designed for Windows Phones (specifically Lumias). Second, it doesn't require special adhesives (why I like it). Third, it will accept ANY 37mm threaded lens or filter. Last, but not least, it also allows you to mount to ANY tripod.
My two cents.