TouchDirector Remote is a remote control app for ATEM switchers, from wherever you are, as long as you have Internet.
It communicates to regular TouchDirector (or TouchDirector Mini) app connected to an ATEM switchers and allows to switch channels, set transitions parameters, make Cut and Auto transitions. And TouchDirector Remote can participate in the WorldTally team chat.
Connection is established via Internet, no wires needed.
Since this near realtime communication creates operation costs, the master app ( TouchDirector / TouchDirector Mini) must be running a simple or a regular WorldTally session in order to connect to a remote app. This requires an In-App purchase in that app.