Smoke & CO Detectors · Head to head

Heiman HS1SA Series Smoke Alarm vs Shelly Plus Smoke Alarm

Full Smart Smoke & CO Detectors comparison in 2026

Data from Amazon and official Heiman and Shelly sites.
2026 verdict
Across the 2026 comparison, Heiman HS1SA Series Smoke Alarm earns the nod over Shelly Plus Smoke Alarm on the strength of price, rating, and battery life. It has the clearer edge on price, rating, and battery life, and it stays ahead on its broader overall balance. Shelly Plus Smoke Alarm is still relevant if you care most about connectivity and integrations, but Heiman HS1SA Series Smoke Alarm is the stronger recommendation overall. Overall, Heiman HS1SA Series Smoke Alarm makes more sense for most people.
vs
FeatureHeiman HS1SA Series Smoke AlarmShelly Plus Smoke AlarmWinner
Price£16.14€39.95Heiman HS1SA Series Smoke Alarm
Rating4.54.4Heiman HS1SA Series Smoke Alarm
Battery Life10 years5 yearsHeiman HS1SA Series Smoke Alarm
ConnectivityZigbee2.4 GHz WiFi, BluetoothShelly Plus Smoke Alarm
IntegrationsSamsung SmartThings, Home AssistantGoogle Home, Alexa, Samsung SmartThings, Home AssistantShelly Plus Smoke Alarm
ScreenNONOTie
SensorsSmokeSmokeTie
AlertsFire Alerts, Low Battery AlertsFire Alerts, Low Battery AlertsTie
Built-in SirenYESYESTie
Built-in LightYESYESTie
Tests ItselfNONOTie
PathlightNONOTie

Frequently Asked Questions

Which is better overall: Heiman HS1SA Series Smoke Alarm or Shelly Plus Smoke Alarm?

Heiman HS1SA Series Smoke Alarm has the stronger overall profile in this comparison, especially for price, rating, and battery life.

What is the biggest difference between Heiman HS1SA Series Smoke Alarm and Shelly Plus Smoke Alarm?

Price is one of the clearest differences: Heiman HS1SA Series Smoke Alarm lists £16.14, while Shelly Plus Smoke Alarm lists €39.95.

Which one looks better on price?

Heiman HS1SA Series Smoke Alarm is listed at £16.14, while Shelly Plus Smoke Alarm is listed at €39.95. Heiman HS1SA Series Smoke Alarm (better spec).

Who should buy Heiman HS1SA Series Smoke Alarm?

Choose Heiman HS1SA Series Smoke Alarm if your priority is price and rating and that matters more than connectivity.

Who should buy Shelly Plus Smoke Alarm?

Choose Shelly Plus Smoke Alarm if your priority is connectivity and integrations and that matters more than price.

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