Verdict
Head-to-head · Best Smart Smoke Detectors

Kidde Ring-Enabled Smart Smoke and Carbon Monoxide Detector vs X-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit)

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

X-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit) comes out ahead by a clear margin (4.1 vs 3.7). X-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit) is best for: Homes without interconnect wiring that want every smoke alarm to sound together and send phone alerts, and that already have separate carbon monoxide coverage. Read the strengths below before deciding.

Kidde Ring-Enabled Smart Smoke and Carbon Monoxide Detector
Ranked #4 in Best Smart Smoke Detectors
Kidde Ring-Enabled Smart Smoke and Carbon Monoxide Detector
1 source$69.97as of Oct 11

The Kidde Ring-Enabled Smart Smoke and Carbon Monoxide Detector offers dual detection for fast-flaming and slow-smoldering fires alongside continuous carbon monoxide monitoring. PCMag found that its smart connectivity effectively prevents users from disabling alarms by sending immediate push notifications for low batteries or power outages, while Eric DIY noted the device requires a proprietary wiring harness during installation. The unit supports interconnection with other hardwired Kidde detectors and reports through the Ring app, though PCMag notes it does not interact with Alexa or other Ring devices, and it relies on standard AA backup batteries rather than sealed cells. This model fits households seeking comprehensive digital oversight of their fire safety infrastructure, but those wanting long-life maintenance-free backups or broader third-party automation support should look elsewhere.

Strengths
  • — Dual detection capabilities monitor both smoke (fast flaming and slow smoldering) and carbon monoxide simultaneously.
  • — Features voice alerts that clearly distinguish between smoke and carbon monoxide dangers during an alarm event.
  • — Supports interconnection with other hardwired Kidde units so all connected detectors sound when one is triggered.
Watch-outs
  • — Smart features depend on Wi-Fi and the Ring app; PCMag notes it does not interact with Alexa or other Ring devices.
  • — Includes only AA battery backup rather than a long-life sealed lithium cell found in some competitors.
X-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit)
Higher ratedRanked #2 in Best Smart Smoke Detectors
X-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit)
1 source$30as of Oct 10

The X-Sense FS31 kit is three battery-powered XS01-M smoke alarms linked by radio to a small Wi-Fi base station that relays alerts to the X-Sense app. PCWorld rated it 4 out of 5: in its testing a test alarm set off all three units from the far corners of a house, simulated smoke triggered them quickly, and push and email notifications arrived in seconds. PCWorld's criticisms are that the alarms do not detect carbon monoxide, the base station has no battery backup so phone alerts stop in a power outage, and one alarm dropped offline during testing and would not reconnect.

Strengths
  • — In PCWorld's test all three alarms sounded together from the far corners of a house, through walls and floors
  • — Alerted quickly to simulated smoke, with push and email notifications sent in seconds, per PCWorld
  • — Alarms kept triggering one another with the base station unplugged in PCWorld's testing
Watch-outs
  • — Does not detect carbon monoxide
  • — Base station has no battery backup, so a power outage stops push notifications, per PCWorld
  • — Base station connects to 2.4GHz Wi-Fi only

How they stack up

Kidde Ring-Enabled Smart Smoke and Carbon Monoxide Detector

The Kidde Ring-Enabled Smart Smoke and Carbon Monoxide Detector is hardwired like the First Alert SC5 Hardwire Smart Smoke and CO Alarm, but it backs up on AA batteries where the SC5 uses a lithium backup, and it costs less. It reports through the Ring app, while the SC5 works with the Google Home app only. The X-Sense SC07 Smoke & CO Alarm runs on a CR123A lithium battery instead of house wiring.

X-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit)

Unlike the X-Sense SC07, the Kidde Ring-Enabled detector and the First Alert SC5 on this page, which all combine smoke and carbon monoxide detection, PCWorld notes the XS01-M alarms detect smoke only. They run on batteries, where the Kidde and First Alert SC5 are hardwired, and they depend on a plugged-in base station for app alerts.

Specs side-by-side

SpecKidde Ring-Enabled Smart Smoke and Carbon Monoxide DetectorX-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit)
Power SourceHardwired with AA Battery BackupAlarms: replaceable 3V lithium cell; base station: USB-C, no battery backup
Compatible EcosystemsRing app—
Detection TypeSmoke and Carbon MonoxideSmoke only
Dimensions2"D x 5"W x 5"H—
MaterialPlastic—
ConnectivityRing AppWi-Fi (2.4GHz only) via base station; X-Sense app
Sensor TypeSplit-spectrum smoke/CO—
Kit contents—Base station plus 3 XS01-M smoke alarms (X-Sense model FS31)
Battery Life—5 years claimed for the preinstalled batteries
Alarm Lifespan—10 years
Interconnect—915MHz radio between alarms, up to 24 alarms per network
Base Station Size—3.5 in square
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