Does anyone know how to replicate the ios7 parallax effect
I know you can do something like this but it’s not quite the same…
sprite(myImage, WIDTH/2+RotationRate.y, HEIGHT/2-RotationRate.x)
Ok i think gravity.x and gravity.y will do… 
Just as an added suggestion, one thing which may also be able to produce the effect are the camera() and perspective() methods. With them, you can specify the eye position as well as the relative position of the camera, and you could use the gravity data that you mentioned above to move the scene. Through this combination, you could also theoretically have more control over the specific appearance of the effect on your view plane.