Heiman Window Door Alarm vs Sonoff DW2-WIFI

The Sonoff DW2-WIFI wins overall on price, more integrations (Google, Alexa, Home Assistant, IFTTT) and extras like low-battery alerts and 90 days of history. The Heiman Window Door Alarm carries a higher owner rating and adds a built-in 65 dB siren.

Integration depth versus a built-in alarm. The Sonoff DW2-WIFI works with Google, Alexa, Home Assistant and IFTTT and keeps 90 days of history, while the Heiman Window Door Alarm is limited to Alexa and Google but includes its own 65 dB audible siren.

Neither does. Both the Sonoff DW2-WIFI and the Heiman Window Door Alarm connect directly to 2.4GHz Wi-Fi with no separate hub or bridge, the Sonoff through eWeLink and the Heiman through the Smart Life (Tuya) app.

The Sonoff DW2-WIFI supports Home Assistant, along with Google, Alexa and IFTTT. The Heiman Window Door Alarm works with Alexa and Google, but Home Assistant support is not confirmed.

Buy the Sonoff DW2-WIFI if you want a cheap, hub-free Wi-Fi sensor with the widest integrations, low-battery alerts and history logging, and you are comfortable enabling the Wi-Fi 'b' protocol during setup. It suits eWeLink and Home Assistant tinkerers.

Choose the Heiman Window Door Alarm if you want a slightly higher-rated hub-free Wi-Fi sensor with a built-in 65 dB siren and simple Smart Life setup. It fits Alexa or Google users who value an on-board alarm over deeper integration.