Shelly Plus Smoke Alarm vs X-Sense SC07-MR Smart Smoke & CO Alarm

They suit different buyers. The X-Sense SC07-MR Smart Smoke & CO Alarm is the stronger life-safety device, covering smoke and carbon monoxide, interconnecting over RF and carrying a five-year warranty. The Shelly Plus Smoke Alarm is the better smart home device, hub-free over Wi-Fi and able to trigger automations in Google Home, SmartThings and Home Assistant, but it detects smoke only.

No. It is a smoke-only alarm with fire alerts and low-battery alerts, but no CO sensor and no CO alerts, so a separate carbon monoxide detector is needed. The X-Sense SC07-MR Smart Smoke & CO Alarm handles both hazards in one unit.

The Shelly Plus Smoke Alarm needs no hub and pairs directly over 2.4GHz Wi-Fi. The X-Sense SC07-MR Smart Smoke & CO Alarm works on its own as an alarm but needs an X-Sense base station for Wi-Fi and the app, and its RF interconnection works without one.

The Shelly Plus Smoke Alarm. It supports automations and MQTT, so it can switch on lights or send notifications through Home Assistant and similar platforms. The X-Sense SC07-MR Smart Smoke & CO Alarm has no automations and reports only through its own app.

The X-Sense SC07-MR Smart Smoke & CO Alarm has an LCD that shows its status and the CO level on the unit. The Shelly Plus Smoke Alarm has no screen and relies on the app and its indicator, though it does include a built-in light the X-Sense lacks.

A Home Assistant, MQTT or Shelly household that wants a smoke alarm to join the network with no hub and drive automations on a smoke event, and that does not need carbon monoxide coverage. Buyers who want smoke and CO in one alarm, or a set that sounds together, should look at the X-Sense SC07-MR Smart Smoke & CO Alarm instead.