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The Best 4Aggregated review·10 sources·updated October 11, 2026

Best Smart Smoke Detectors

Top 4 smart smoke detectors reviewed and ranked.

This guide aggregates 10 published reviews across 4 products; the thinnest-sourced pick rests on 1. How we rank.

Verdict is reader-supported. As an Amazon Associate we earn from qualifying purchases. Some links on this page are affiliate links — if you click through and buy, we may earn a small commission at no extra cost to you. Our ratings are sourced from independent publications, not sponsors.
Quick answer

X-Sense SC07 Smoke & CO Alarm is our top pick for smart smoke detectors — an averaged 4.2/5 across 1 published review at about $35.98. Runner-up: X-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit) (~$30).

Read the X-Sense SC07 Smoke & CO Alarm review →$35.98 · Check Price on Amazon
At a glance4 products ▾
1X-Sense SC07 Smoke & CO AlarmTop Pick
1 source
$35.98Best for: Homeowners with a 2.4GHz Wi-Fi network who want battery-powered smoke and CO alarms with phone alerts and no wiring.
$35.98 · Check Price on Amazon
2X-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit)
1 source
$30Best 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.
$30 · Buy at x-sense.com
3First Alert SC5 Hardwire Smart Smoke and CO Alarm
1 sourceall derived
$128.89Best for: Google Home users replacing old Nest mounts who prioritize easy installation over smart home versatility
$128.89 · Check Price on Amazon
4Kidde Ring-Enabled Smart Smoke and Carbon Monoxide Detector
1 source
$69.97Best for: Homes with hardwired Kidde alarms that want smoke and CO alerts pushed to a phone through the Ring app.
$69.97 · Check Price on Amazon

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

The full ranking

How we rank →
X-Sense SC07 Smoke & CO Alarm
#1 · Top Pick
Best for: Homeowners with a 2.4GHz Wi-Fi network who want battery-powered smoke and CO alarms with phone alerts and no wiring.
X-Sense SC07 Smoke & CO Alarm
1 source$35.98as of Oct 6
▾Why it's ranked here

The Gadgeteer found that this Wi-Fi-connected detector offers valuable remote monitoring via smartphone push notifications and an LCD screen displaying carbon monoxide levels in parts per million. It supports interconnecting up to 24 units under a single account, though it is incompatible with 5GHz networks and requires users to verify their router settings for successful pairing. The device produces a deafening alarm of at least 85 decibels, but its replaceable battery means it does not satisfy rules such as New York's, which require ten-year sealed batteries or hardwiring, and Reviewed found the SC07-MR variant carried no UL label. This model fits homeowners with standard dual-band routers who prioritize app integration over hard-wired reliability, while those in jurisdictions requiring ten-year sealed batteries should look elsewhere.

Strengths
  • — Provides real-time smartphone push notifications via Wi-Fi connectivity when not at home
  • — Features an LCD screen that displays carbon monoxide levels in parts per million (ppm)
Watch-outs
  • — Incompatible with 5GHz Wi-Fi networks, requiring connection to a 2.4GHz router
  • — Some variants lack UL certification and require an additional base station for smart features
$35.98 · Check Price on AmazonFull review →vs. X-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit) →
X-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit)
#2
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.
X-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit)
1 source$30as of Oct 10
▾Why it's ranked here

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
Watch-outs
  • — Does not detect carbon monoxide
  • — Base station has no battery backup, so a power outage stops push notifications, per PCWorld
$30 · Buy at x-sense.comFull review →vs. X-Sense SC07 Smoke & CO Alarm →
First Alert SC5 Hardwire Smart Smoke and CO Alarm
#3
★ Premium Pick
Best for: Google Home users replacing old Nest mounts who prioritize easy installation over smart home versatility
First Alert SC5 Hardwire Smart Smoke and CO Alarm
1 sourceall derived$128.89as of Oct 6
▾Why it's ranked here

The First Alert SC5 is engineered as a direct drop-in replacement for the discontinued Google Nest Protect, utilizing an included wiring adapter to fit existing ceiling mounts without requiring new electrical work. smarthomecompared found that its dual photoelectric and electrochemical sensors effectively distinguish between hazards like grease fires and carbon monoxide, while PureReviews noted that loud voice alerts specify both the danger type and device location for clear identification during emergencies. However, the unit lacks motion-activated pathway lighting and automated self-testing, forcing users to manually verify operation via a button press rather than relying on daily diagnostics. Because it works exclusively with the Google Home app and offers no Alexa or Apple HomeKit support, this alarm fits only households already invested in that ecosystem who prioritize easy installation over smart home versatility.

Strengths
  • — Designed as a drop-in replacement for discontinued Google Nest Protect, fitting existing ceiling mounts with included wiring adapter
  • — Features loud built-in siren with voice alerts that specify the danger type and device location
Watch-outs
  • — Lacks motion-activated pathway night light found on the Nest Protect it replaces
  • — Works exclusively with Google Home app, offering no Alexa, Apple HomeKit, or Matter support
$128.89 · Check Price on AmazonFull review →vs. X-Sense SC07 Smoke & CO Alarm →
Kidde Ring-Enabled Smart Smoke and Carbon Monoxide Detector
#4
Best for: Homes with hardwired Kidde alarms that want smoke and CO alerts pushed to a phone through the Ring app.
Kidde Ring-Enabled Smart Smoke and Carbon Monoxide Detector
1 source$69.97as of Oct 11
▾Why it's ranked here

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.
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.
$69.97 · Check Price on AmazonFull review →vs. X-Sense SC07 Smoke & CO Alarm →
Reviews aggregated from
PCMagElectronicslabThegadgeteerReviewedPCWorldSmarthomecomparedPurereviews

Spec comparison

4 products
vs
SpecX-Sense SC07 Smoke & CO AlarmX-Sense XS01-M Interconnected Smart Smoke Alarm (FS31 kit)
Power SourceCR123A Lithium BatteryAlarms: replaceable 3V lithium cell; base station: USB-C, no battery backup
Lifespan10 Years—
Detection TypePhotoelectric Smoke / Electromechanical COSmoke only
Alarm Volume≥85dB at 3 meters—
Dimensions5.7"D x 5.7"W x 2"H—
MaterialHeat-Resistant PC Plastic Material—
Sensor TypePhotoelectric smoke, Electrochemical CO—
Connectivity—Wi-Fi (2.4GHz only) via base station; X-Sense app
Compatible Ecosystems——

Frequently asked questions

What's the strongest pick among smart smoke detectors?
X-Sense SC07 Smoke & CO Alarm is the top pick for smart smoke detectors — 4.2/5 averaged from 1 published reviews. The Gadgeteer found that this Wi-Fi-connected detector offers valuable remote monitoring via smartphone push notifications and an LCD screen displaying carbon monoxide levels in parts per million. It supports interconnecting up to 24 units under a single account, though it is incompatible with 5GHz networks and requires users to verify their router settings for successful pairing. The device produces a deafening alarm of at least 85 decibels, but its replaceable battery means it does not satisfy rules such as New York's, which require ten-year sealed batteries or hardwiring, and Reviewed found the SC07-MR variant carried no UL label. This model fits homeowners with standard dual-band routers who prioritize app integration over hard-wired reliability, while those in jurisdictions requiring ten-year sealed batteries should look elsewhere.
Is this smart smoke detector guide up to date?
This guide was last re-checked in October 2026. Prices, links, and source ratings are re-verified on a rolling basis, and the ranking updates when the underlying scores change.

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