It starts and ends with these two devices. The circular sensors attach via adhesive to your household items: door frames, refrigerators, windows, light-switches, whatever. The hub plugs into the wall and collects data over Wifi, bringing it straight to your fingertips. The propane tank on your grill running low? Notion will alert you. That fridge door not staying closed? It knows.
"We're really trying to nail the user experience side of things." Margoles, 29, says. For example, it would be incredibly irritating to get an alert every time you open your front door. To account for this, Notion pairs via Bluetooth with your phone, so it recognizes your presence and won't notify you, avoiding a mini panic attack every five minutes thinking that an intruder broke in.