To add a new appliance, launch your Sonic mobile App then tap on "Settings", and under "Home Settings" tap "Appliances & Outlets".  At the bottom, tap the "(+) Add" button to add a new appliance. 

From here, you'll be able to add the appliance name, type and which space would you like to assign this to. Once you've filled this in, click on "Add".

To delete/edit, tap on the appliance you wish to delete/ amend. Once you have chosen the appliance you wish to delete, tap "delete": a remove appliance confirmation will show. Tap "Yes" to confirm. 

If you would like to learn how to add/edit a new space, please read here.