Aqara U400 review: HomeKit’s futuristic smart lock has arrived

The Aqara U400 smart lock was reviewed as a HomeKit-first device with a relatively manageable, though slightly more involved, installation.

It stands out for fast HomeKit setup and UWB-based proximity unlocking that can automatically unlock as you approach with an iPhone or Apple Watch.

The lock also supports NFC tap-to-unlock, fingerprint entry, passcodes, and physical key backup for flexible access options.

The review suggests HomeKit is moving toward a more seamless, futuristic door-entry experience with Ultra Wideband features.