I didn’t use the Smart Remote long, but I think it basically is just a remote control to change programs. It does not name the programs, but just lists them by number, so you have to know what number is which. The Smart Direct is much more functional, although one could argue that the features are just bells and whistles. It names the programs, and adds three more programs in addition to the 6 that the fitter can program; Cafe, Cinema & Theater, and Group Conversation. It lets you change a few minor things like the HA tone volume, and the power on delay. It also has a Sound Exposure function that graphs your sound exposure during the day. Cute, but probably not all that useful… It controls microphone focus in the Automatic program, but I believe Smart Remote does that too. The best description of what the Smart Direct does, comes from Signia. Most of the features, but I don’t think all, are available on the Connexx Smart Direct app for Rexton/KS8.
The feature I like the best comes with the use of an iPhone, and does not even seem to need an app. It automatically routes iPhone music and incoming phone audio to the HA’s using bluetooth.