Winner
Updated September 2026
Data from Amazon and official Heiman and Kidde sites.
2026 verdict
In 2026, the recommendation leans toward Heiman Matter Smoke Detector S1-M over Kidde Smart Smoke Alarm (P4010ACS-WF), driven by price, rating, and integrations.
It has the clearer edge on price, rating, and integrations, and it stays ahead on steam check. Kidde Smart Smoke Alarm (P4010ACS-WF) still makes sense if battery life is your priority, but most buyers should still lean toward Heiman Matter Smoke Detector S1-M. For most setups, Heiman Matter Smoke Detector S1-M is the smarter buy.
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| Feature | Heiman Matter Smoke Detector S1-M | Kidde Smart Smoke Alarm (P4010ACS-WF) | Winner |
|---|---|---|---|
| Price | $39.99 | $40.79 | Heiman Matter Smoke Detector S1-M |
| Rating | 3.6 | 3.2 | Heiman Matter Smoke Detector S1-M |
| Battery Life | 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-M |
| Steam Check | YES | NO | Heiman Matter Smoke Detector S1-M |
| Connectivity | Thread Protocol | 2.4 GHz WiFi | Tie |
| Screen | NO | NO | Tie |
| Sensors | Smoke | Smoke | 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 |
| Pathlight | NO | NO | Tie |
Winner
- + Price: $39.99
- + Rating: 3.6
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Battery Life: 5 years vs 10 years
- + Battery Life: 10 years
- - Price: $40.79 vs $39.99
- - Rating: 3.2 vs 3.6
Price history compared
Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.
- Heiman Matter Smoke Detector S1-M
- Kidde Smart Smoke Alarm (P4010ACS-WF)
Loading price history...
Frequently Asked Questions
Which is better overall: Heiman Matter Smoke Detector S1-M or Kidde Smart Smoke Alarm (P4010ACS-WF)?
Heiman Matter Smoke Detector S1-M has the stronger overall profile in this comparison, especially for price, rating, and integrations.
What is the biggest difference between Heiman Matter Smoke Detector S1-M and Kidde Smart Smoke Alarm (P4010ACS-WF)?
Price is one of the clearest differences: Heiman Matter Smoke Detector S1-M lists $39.99, while Kidde Smart Smoke Alarm (P4010ACS-WF) lists $40.79.
Which one looks better on price?
Heiman Matter Smoke Detector S1-M is listed at $39.99, while Kidde Smart Smoke Alarm (P4010ACS-WF) is listed at $40.79. Heiman Matter Smoke Detector S1-M (better spec).
Who should buy Heiman Matter Smoke Detector S1-M?
Choose Heiman Matter Smoke Detector S1-M if your priority is price and rating and that matters more than battery life.
Who should buy Kidde Smart Smoke Alarm (P4010ACS-WF)?
Choose Kidde Smart Smoke Alarm (P4010ACS-WF) if your priority is battery life and that matters more than price.
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
HeimanMatter Smoke Detector S1-TM
$49.98
GoogleNest Protect (Wired)
$449.99
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
ShellySmoke Alarm
25% OFF€53.43€39.95
KiddeSmart Smoke & CO Detector with Ring
$69.97
X-SenseXC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts
AqaraSmart Smoke Detector
16% OFF€44.99€37.99
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- Heiman
Matter Smoke Detector S1-M
$39.99 
First AlertSMCO410 Smoke Detector & CO Alarm
11% OFF$64.98$57.99
KiddeSmart Smoke + Indoor Air Quality Alarm
$106.72
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
4.3(51)$25.99 - Smoke & CO DetectorsHeiman
Matter Smoke Detector S1-M
3.6(77)$39.99 - Smoke & CO DetectorsHeiman
Matter Smoke Detector S1-TM
4.8(7)$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
4.4(445)$69.97 - Smoke & CO DetectorsKidde
Smart Smoke + Indoor Air Quality Alarm
3.3(198)$106.72 
Water Leak SensorsKiddeWiFi Water Leak & Freeze Detector
3.9(737)37% OFF$34.97$21.99