Aqara Smart Lock U200 vs Aqara Smart Lock U400

Aqara Smart Lock U200 wins with its lower price and fully native integrations across all seven major platforms including IFTTT. Aqara Smart Lock U400 earns a higher owner rating with UWB hands-free unlocking, an IP65 panel and a quicker motor, but needs an Aqara hub for Google Home and Alexa.

UWB. The U400 unlocks automatically the moment you approach with an iPhone or Apple Watch, no tap needed, while the U200 relies on Apple Home Key taps, fingerprint, codes or NFC. Otherwise their unlock menus are very similar.

Both need a Thread border router for remote access and Matter. The Aqara Smart Lock U200 then works natively with everything; the Aqara Smart Lock U400 additionally requires an Aqara hub specifically for Google Home and Alexa.

The Aqara Smart Lock U400's outer panel is rated IP65 against dust and heavy rain, above the IPX5 of the Aqara Smart Lock U200. Both run about 6 months per charge with emergency backup options (AAA batteries or USB on the U200, USB-C on the U400).

Choose Aqara Smart Lock U200 for maximum platform reach at a lower price, including IFTTT and native Google and Alexa support, with Home Key, fingerprint and a full password toolkit. Note some owners report calibration quirks and wear after a year.

Choose Aqara Smart Lock U400 if you live on iPhone or Apple Watch and want hands-free UWB unlocking, tougher IP65 weather sealing and the better-rated, newer design, accepting the hub requirement for Google and Alexa.