Hi Frank,
You can create your remote controller via designer.sbrick.com
If you use the same account what you use to log in to the SBrick app you will see it at the profile market.
Please check the aspect ratio for the best experience. If you create a profile which not match with your device, you can see it after change the aspect ratio at the profile market (top-right)
You can use multiple SBricks at the same time, power them on when you configure the profile with the app and you will see them.