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by yowmamasita 4401 days ago
How extensive is the physics engine implementation?
2 comments

Wikipedia claims that SpriteKit uses the Box2D engine internally: http://en.wikipedia.org/wiki/Box2D
In iOS7 it is Box2d, but not all of it was implemented. There is likely a lot more now in iOS8. There is also a 3d version which I assume uses Box3d.