Updated October 2026
Data from Amazon and official Aqara and Kidde sites.
2026 verdict
Across the 2026 comparison, Kidde Smart Smoke + Indoor Air Quality Alarm earns the nod over Aqara Smart Smoke Detector on the strength of warranty, sensors, and alerts.
Its clearest strengths are warranty, sensors, and alerts, and it still looks stronger on its broader overall balance. Aqara Smart Smoke Detector is still relevant if you care most about price, rating, and integrations, but Kidde Smart Smoke + Indoor Air Quality Alarm is the stronger recommendation overall. Overall, Kidde Smart Smoke + Indoor Air Quality Alarm makes more sense for most people.
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| Feature | Aqara Smart Smoke Detector | Kidde Smart Smoke + Indoor Air Quality Alarm | Winner |
|---|---|---|---|
| Price | €39.99 | $111.59 | Aqara Smart Smoke Detector |
| Rating | 4.3 | 3.3 | Aqara Smart Smoke Detector |
| Warranty | 1 year | 10 years | Kidde Smart Smoke + Indoor Air Quality Alarm |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Home Assistant | Aqara Smart Smoke Detector |
| Sensors | Smoke | Smoke, Humidity, Air Quality | Kidde Smart Smoke + Indoor Air Quality Alarm |
| Alerts | Fire Alerts, Low Battery Alerts | Fire Alerts, Low Battery Alerts, Air Quality Alerts | Kidde Smart Smoke + Indoor Air Quality Alarm |
| Connectivity | Zigbee | 2.4 GHz WiFi | Tie |
| Screen | NO | NO | Tie |
| Built-in Siren | YES | YES | Tie |
| Built-in Light | YES | YES | Tie |
| Pathlight | NO | NO | Tie |
| Steam Check | NO | NO | Tie |
11% OFF
€39.99
€44.99
- + Price: €39.99
- + Rating: 4.3
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Warranty: 1 year vs 10 years
- - Sensors: Smoke vs Smoke, Humidity, Air Quality
Winner
$111.59
- + Warranty: 10 years
- + Sensors: Smoke, Humidity, Air Quality
- + Alerts: Fire Alerts, Low Battery Alerts, Air Quality Alerts
- - Price: $111.59 vs €39.99
- - Rating: 3.3 vs 4.3
Frequently Asked Questions
Which is better overall: Aqara Smart Smoke Detector or Kidde Smart Smoke + Indoor Air Quality Alarm?
Kidde Smart Smoke + Indoor Air Quality Alarm has the stronger overall profile in this comparison, especially for warranty, sensors, and alerts.
What is the biggest difference between Aqara Smart Smoke Detector and Kidde Smart Smoke + Indoor Air Quality Alarm?
Price is one of the clearest differences: Aqara Smart Smoke Detector lists €39.99, while Kidde Smart Smoke + Indoor Air Quality Alarm lists $111.59.
Which one looks better on price?
Aqara Smart Smoke Detector is listed at €39.99, while Kidde Smart Smoke + Indoor Air Quality Alarm is listed at $111.59. Aqara Smart Smoke Detector (better spec).
Who should buy Aqara Smart Smoke Detector?
Choose Aqara Smart Smoke Detector if your priority is price and rating and that matters more than warranty.
Who should buy Kidde Smart Smoke + Indoor Air Quality Alarm?
Choose Kidde Smart Smoke + Indoor Air Quality Alarm if your priority is warranty and sensors and that matters more than price.
Full comparison table
Compare all 25 Smoke & CO Detectors side by side
You are looking at two of them. The full table lines up all Smoke & CO Detectors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 25 Smoke & CO Detectors
- 44 specs compared
- 41 filters
YoLinkPhotoelectric Smoke Alarm
HeimanMatter Smoke Detector S1-TM
$49.98
GoogleNest Protect (Wired)
$499.99
X-SenseWi-Fi CO Alarm
€39.99
X-SenseSC07-MR Smart Smoke & CO Alarm
HeimanHS1SA-E Zigbee Smoke Alarm
€34.99
X-SenseWiFi Smoke & CO Detector
€59.18
X-SenseWi-Fi Smoke Alarm
€24.06
GoogleNest Protect (Battery)
ShellySmoke Alarm
12% OFF€59.99€52.54
EufySmoke Alarm E10
17% OFF$59.99$49.99
X-SenseXC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts
15% OFF
€35.99€30.59
HeimanInterconnected Smoke Alarm S1-R
$25.99- Aqara
Smart Smoke Detector
11% OFF€44.99€39.99 
KiddeSmart Smoke & CO Detector with Ring
$69.97
HeimanInterconnected CO Alarm C1-R
10% OFF$29.98$26.99
First AlertSC5 Battery Smart Smoke & CO Alarm
HeimanSmart CO Alarm
17% OFF$59.99$49.99
HeimanMatter Smoke Detector S1-M
$39.99
First AlertSMCO410 Smoke Detector & CO Alarm
$64.98
Air Quality MonitorsAqaraTVOC Air Quality Monitor
3.4(467)
CamerasAqaraCamera E1
4.2(1,813)$69.99
CamerasAqaraCamera G100
4.2(1,711)$39.99
CamerasAqaraCamera Hub G2H Pro
4.3(2,168)
CamerasAqaraCamera Hub G3
4.2(1,043)18% OFF$119.99$98.99
CamerasAqaraCamera Hub G350
4.3(222)$139.99
CamerasAqaraCamera Hub G5 Pro PoE
4.5(302)13% OFF$229.99$199.99
CamerasAqaraCamera Hub G5 Pro WiFi
4.2(291)$199.99
DoorbellsAqaraDoorbell Camera G400 (Wired)
4.2(405)$99.99
DoorbellsAqaraDoorbell Camera Hub G410
3.9(1,475)8% OFF$144.99$133.99
DoorbellsAqaraSmart Video Doorbell G4
3.6(3,328)6% OFF$79.99$74.99
Door LocksAqaraSmart Lock D200i
3.3(7)
Door LocksAqaraSmart Lock N100 Zigbee Edition
$159.90
Door LocksAqaraSmart Lock U100
4.1(2,568)7% OFF$149.99$139.99
Door LocksAqaraSmart Lock U200
2.6(2,057)
Door LocksAqaraSmart Lock U300
3.6(370)
Door LocksAqaraSmart Lock U400
4.1(402)$269.99
Door LocksAqaraSmart Lock U50
4.0(670)5% OFF$119.99$113.99
Door & Window SensorsAqaraDoor and Window Sensor P2
3.6(1,120)7% OFF$29.99$27.99
Door & Window SensorsAqaraDoor and Window Sensor
4.4(6,103)6% OFF$17.99$16.99
Smoke & CO DetectorsKiddeSmart Smoke Alarm (P4010ACS-WF)
3.2(316)$40.79- Smoke & CO DetectorsKidde
Smart Smoke & CO Detector with Ring
4.3(458)$69.97 - Smoke & CO DetectorsKidde
Smart Smoke + Indoor Air Quality Alarm
3.3(199)$111.59 
Water Leak SensorsKiddeWiFi Water Leak & Freeze Detector
4.0(738)32% OFF$34.97$23.92