To add a new space or edit an existing one on your mobile app, tap "Settings" and under "Home Settings", tap "Appliances & Outlets". It'll open a new screen and at the bottom click on "(+) Add" to add a new space.
From there, you'll see other pre-set rooms such as kitchen, utility room, bathroom, etc. You can also customise a room and appliance, and name this whatever may suit.
To delete/edit a room space, click on the "pen" right next to the room name. Once you've done that, you'll be able to delete or amend the room name.
If you would like to learn how to add/edit new appliances, please read here.