Lost Echo is now available on Windows Phone! After being featured in multiple countries on iPhone and iPad, we have finally finished porting it to Windows Phone. Android is coming up next (it's second only because we need more testing to do to it, because of more devices, and because of more features, like controller support).
You can find the Windows Phone version here:
Hopefully once we're done with porting, we can focus 100% on Lost Echo: Resonance!