Great app, nice and simple but does what it needs to.
The main missing thing is an indication of the update status - on slower networks, I have no idea how old the data is. I notice the Windows app has an indication of this, please could you add to the iOS app, a simple spinner in the corner or something like that would be fine.
Of course adding the device data timestamp (a frequent request for all of UI7 from what I can see) would also be good.
And why not create a sub-board for this specifically, like the other remote control apps?