Tech & Gadgets · Head-to-head
First Alert SC5 Smart Smoke & Carbon Monoxide Alarm vs X-Sense XP0A-iR Wi-Fi Smart Smoke & Carbon Monoxide Alarm
Which should you buy? Here's the honest call, pulled from our full The Best Smart Smoke & Carbon Monoxide Detectors: 4 Compared (and One to Skip) comparison.
The First Alert SC5 is the most complete smart smoke-and-CO alarm for most homes, especially if you use the Google Home app, and it comes in both battery and hardwired versions. The X-Sense XP0A-iR is the value runner-up: standalone Wi-Fi, a clear CO readout and spoken alerts, with no hub to buy.
First Alert SC5 Smart Smoke & Carbon Monoxide Alarm
Buy itThe de facto successor to the old Google smart alarm, with the slickest phone-alert experience in a Google/Nest home.
- Detects both smoke and carbon monoxide and pairs with the Google Home app for per-room alerts
- Sold in both battery and hardwired versions, so it fits renters and wired homes
- Strong emergency flow: reviewers highlight silence-from-phone and, in a camera-equipped home, live room views
- You are buying into the Google Home ecosystem - the best features assume you use that app
- Premium price, especially once you cover a whole house
X-Sense XP0A-iR Wi-Fi Smart Smoke & Carbon Monoxide Alarm
Buy itStandalone Wi-Fi, an LCD carbon-monoxide readout and spoken location alerts - the value pick that needs no hub.
- Connects to Wi-Fi and pushes phone alerts on its own - no separate base station or bridge required
- Digital LCD shows the CO reading and a voice announces which room, which owners consistently praise
- Replaceable battery and affordable multi-packs make whole-home coverage realistic
- Lives in X-Sense's own app rather than plugging into Google Home or Alexa routines
- 2.4 GHz Wi-Fi only, and the brand has less name recognition than First Alert or Kidde
Side by side
| First Alert SC5 Smart Smoke & Carbon Monoxide Alarm | X-Sense XP0A-iR Wi-Fi Smart Smoke & Carbon Monoxide Alarm | |
|---|---|---|
| Our verdict | Buy | Buy |
| Best for | Anyone already running a Google/Nest home who wants the most polished smart-alert experience. | Value hunters and non-ecosystem homes that want app alerts without buying into a smart-home platform. |
| Price tier | $$$ · premium | $$ · mid-range |
The bottom line
Our overall pick is the First Alert SC5 Smart Smoke & Carbon Monoxide Alarm - The de facto successor to the old Google smart alarm, with the slickest phone-alert experience in a Google/Nest home. Choose the X-Sense XP0A-iR Wi-Fi Smart Smoke & Carbon Monoxide Alarm instead if value hunters and non-ecosystem homes that want app alerts without buying into a smart-home platform.
Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete The Best Smart Smoke & Carbon Monoxide Detectors: 4 Compared (and One to Skip).