Hi, just posted this question on the Github project of the iOS app but I think this is the "official" place to ask...? :) anyways https://github.com/NordicSemiconductor/IOS-nRF-Mesh-Library/issues/108
Short summary, when controlling the experimental dimming example with the iOS app the range is very small, doesn’t go from 0 to 100%, it does only from 0 to 3% (or 97% to 100% if you have the reversed pin polarity).
Android app works fine.