@relifram and @NicNic What app version?
There are both the 1.x and newer 2.x available on the app store right now, and the 2.x is getting a lot of updates. So really need to know what app exactly.
EDIT: I just tested it on 2.0.4 (263) (might be a beta release)
It scans the code and give no indication that it worked, but it does in fact add it to the list. It does not ask for a name or anything and it actually uses the same name as the last entry already in the list (not sure what happens if list is blank). Documented bug that has not been fixed: SmartStart used the same name/location as previously joined device for a new device - #4 by jtp10181
After you scan, try backing out of the SS list (or force quit the app) and then go back in, which should force the app to query the hub for the list again. Might be that it is working but the list is not refreshing after you scan.
I sort of gave up testing the apps, they just keep working on crashing and geofence issues, nothing else is getting fixed at the moment 
