Short answer: yes.
Long answer: the iphone does not support Quick Charge 3.0. This means that it will not be able to charge at full power of the charger, but it will still charge 2.4x faster than a standard iphone charger (i.e. 12w). And that's even with 2 devices connected (i.e. 24w, out of the 36w available from the charger).