Just from the example video I see that there is some simplification going on in the demo, not sure if this is actually true for the current version :)

I.e. it shows "simplify(nodecount -> nodecount2)". On iOS we can call (Java code) new GraphHopper().forMobile() and avoid simplification (point reduction) as we do not have a need to reduce point count like we need for server side applications to save bandwidth. Avoiding point reduction means some further speed up although it should not be that much :)