From the old Hestia website:
Native iOS application for my iPhone/iPad to access and control my HestiaPi remotely.
I’ll add Android to that 
Well with your MQTT hack to the HestiaPi Original, OpenHAB is fairly easy to add and then you get for free the support for all the smartphone types! Yoohooo !
Indeed so. I’ll be including that in my blog post, maybe it’ll have to be in two parts though …
Well with the Classic HestiaPi running OpenHAB and with the HestiaPi Touch natively supporting it, we can safely say now that smartphone Apps are supported just fine. Download the right OS here: