Winner
Updated September 2026
Data from Amazon and official Heiman and Kidde sites.
2026 verdict
Heiman Matter Smoke Detector S1-TM has the better all-around case than Kidde Smart Smoke Alarm (P4010ACS-WF) in 2026, starting with rating, integrations, and sensors.
Its biggest wins come from rating, integrations, and sensors, and tests itself and steam check add more confidence to the verdict. Kidde Smart Smoke Alarm (P4010ACS-WF) is still relevant if you care most about price and battery life, but Heiman Matter Smoke Detector S1-TM is the stronger recommendation overall. That is why Heiman Matter Smoke Detector S1-TM wins the verdict here.
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| Feature | Heiman Matter Smoke Detector S1-TM | Kidde Smart Smoke Alarm (P4010ACS-WF) | Winner |
|---|---|---|---|
| Price | $49.98 | $40.79 | Kidde Smart Smoke Alarm (P4010ACS-WF) |
| Rating | 5.0 | 3.2 | Heiman Matter Smoke Detector S1-TM |
| Battery Life | 3.5 years | 10 years | Kidde Smart Smoke Alarm (P4010ACS-WF) |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Home Assistant | Heiman Matter Smoke Detector S1-TM |
| Sensors | Smoke, Temperature, Humidity | Smoke | Heiman Matter Smoke Detector S1-TM |
| Tests Itself | YES | NO | Heiman Matter Smoke Detector S1-TM |
| Steam Check | YES | NO | Heiman Matter Smoke Detector S1-TM |
| Connectivity | Thread Protocol | 2.4 GHz WiFi | Tie |
| Screen | NO | NO | Tie |
| Alerts | Fire Alerts, Low Battery Alerts | Fire Alerts, Low Battery Alerts | Tie |
| Built-in Siren | YES | YES | Tie |
| Built-in Light | NO | NO | Tie |
Winner
- + Rating: 5.0
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- + Sensors: Smoke, Temperature, Humidity
- - Price: $49.98 vs $40.79
- - Battery Life: 3.5 years vs 10 years
- + Price: $40.79
- + Battery Life: 10 years
- - Rating: 3.2 vs 5.0
- - Integrations: Google Home, Alexa, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
Frequently Asked Questions
Which is better overall: Heiman Matter Smoke Detector S1-TM or Kidde Smart Smoke Alarm (P4010ACS-WF)?
Heiman Matter Smoke Detector S1-TM has the stronger overall profile in this comparison, especially for rating, integrations, and sensors.
What is the biggest difference between Heiman Matter Smoke Detector S1-TM and Kidde Smart Smoke Alarm (P4010ACS-WF)?
Price is one of the clearest differences: Heiman Matter Smoke Detector S1-TM lists $49.98, while Kidde Smart Smoke Alarm (P4010ACS-WF) lists $40.79.
Which one looks better on price?
Heiman Matter Smoke Detector S1-TM is listed at $49.98, while Kidde Smart Smoke Alarm (P4010ACS-WF) is listed at $40.79. Kidde Smart Smoke Alarm (P4010ACS-WF) (better spec).
Who should buy Heiman Matter Smoke Detector S1-TM?
Choose Heiman Matter Smoke Detector S1-TM if your priority is rating and integrations and that matters more than price.
Who should buy Kidde Smart Smoke Alarm (P4010ACS-WF)?
Choose Kidde Smart Smoke Alarm (P4010ACS-WF) if your priority is price and battery life and that matters more than rating.
Full comparison table
Compare all 24 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.
- 24 Smoke & CO Detectors
- 44 specs compared
- 41 filters
YoLinkPhotoelectric Smoke Alarm
$49.99- Heiman
Matter Smoke Detector S1-TM
$49.98 
X-SenseWi-Fi CO Alarm
X-SenseSC07-MR Smart Smoke & CO Alarm
HeimanHS1SA Series Smoke Alarm
5% OFF£16.99£16.14
X-SenseWiFi Smoke & CO Detector
X-SenseWi-Fi Smoke Alarm
GoogleNest Protect (Battery)
$406.99
GoogleNest Protect (Wired)
$449.99
ShellySmoke Alarm
25% OFF€53.43€39.95
X-SenseXC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts
AqaraSmart Smoke Detector
16% OFF€44.99€37.99
KiddeSmart Smoke & CO Detector with Ring
$69.97
HeimanInterconnected Smoke Alarm S1-R
$25.99
HeimanInterconnected CO Alarm C1-R
10% OFF$29.98$26.99
First AlertSC5 Battery Smart Smoke & CO Alarm
HeimanSmart CO Alarm
20% OFF$59.99$47.99
HeimanMatter Smoke Detector S1-M
$39.99
First AlertSMCO410 Smoke Detector & CO Alarm
$64.98
KiddeSmart Smoke + Indoor Air Quality Alarm
$106.56
Door & Window SensorsHeimanWindow Door Alarm
4.0(148)$19.98
Gas DetectorsHeimanHS1CG Series Combustible Gas Sensor
Gas DetectorsHeimanWS2CG Series Combustible Gas Detector
Motion SensorsHeimanSmart Motion Sensor
3.2(32)$23.99
Motion SensorsHeimanWiFi Smart Motion Sensor
2.8(43)$12.98
SirensHeimanSmart Siren HS2WD series
$79.99- Smoke & CO DetectorsHeiman
HS1SA Series Smoke Alarm
4.5(5,145)5% OFF£16.99£16.14 - Smoke & CO DetectorsHeiman
Interconnected CO Alarm C1-R
4.0(24)10% OFF$29.98$26.99 - Smoke & CO DetectorsHeiman
Interconnected Smoke Alarm S1-R
4.2(204)$25.99 - Smoke & CO DetectorsHeiman
Matter Smoke Detector S1-M
3.6(77)$39.99 - Smoke & CO DetectorsHeiman
Matter Smoke Detector S1-TM
5.0(4)$49.98 - Smoke & CO DetectorsHeiman
Smart CO Alarm
3.7(21)20% OFF$59.99$47.99 
Vibration SensorsHeimanSmart Vibration Sensor HS1VS series
$14.90
Water Leak SensorsHeimanSmart Water Leakage Sensor
4.2(40)20% OFF$19.99$15.99
Smoke & CO DetectorsKiddeSmart Smoke Alarm (P4010ACS-WF)
3.2(316)$40.79- Smoke & CO DetectorsKidde
Smart Smoke & CO Detector with Ring
4.3(441)$69.97 - Smoke & CO DetectorsKidde
Smart Smoke + Indoor Air Quality Alarm
3.3(198)$106.56 
Water Leak SensorsKiddeWiFi Water Leak & Freeze Detector
3.9(737)52% OFF$34.97$16.64