Heiman Smart CO Alarm vs X-Sense WiFi Smoke & CO Detector

Platform reach versus hazard coverage decide this one: the X-Sense WiFi Smoke & CO Detector pulls ahead overall with a friendlier price, higher owner rating, a live-reading LCD screen, and dual smoke-plus-CO sensing that the CO-only Heiman Smart CO Alarm cannot match. The Heiman Smart CO Alarm stands out for the only real integrations of the pair, reaching Google Home, Alexa, Apple HomeKit, Samsung SmartThings and Home Assistant through Matter over Thread, while the X-Sense unit connects solely to its own app over WiFi with no smart home platform support at all. Both include a built-in siren and light for local alerts, so the choice mostly comes down to whether you want one alarm covering two hazards or a CO-only sensor that plugs into a wider smart home. Households wanting a single detector for both smoke and carbon monoxide should choose the X-Sense WiFi Smoke & CO Detector, while anyone who already has smoke coverage and wants CO monitoring to show up in Google Home, Alexa or HomeKit routines should pick the Heiman Smart CO Alarm.