Aqara Smart Lock U400 vs Eufy Smart Lock C220

The Aqara Smart Lock U400 wins on capability: ultra-wideband hands-free unlock, more entry methods, broader connectivity and integrations, and an IP65 weather rating. The Eufy Smart Lock C220 wins on value and everyday simplicity, with a lower price, a higher owner rating, longer battery life and built-in Wi-Fi that needs no hub. Choose by whether you prioritize cutting-edge features or affordable dependability.

The Aqara Smart Lock U400 adds ultra-wideband (UWB) hands-free unlock that opens the door as you approach with an iPhone or Apple Watch, plus NFC, Bluetooth, Apple HomeKit and Matter over Thread. The Eufy Smart Lock C220 has none of these; it relies on fingerprint, keypad, Apple Home Key and app control over its own built-in Wi-Fi.

The Eufy Smart Lock C220 uses 8 replaceable AA batteries rated around 8 months and connects over built-in Wi-Fi, so no hub is required. The Aqara Smart Lock U400 uses a rechargeable USB-C battery rated around 6 months and needs a Thread border router (and an Aqara Hub for Google Home or Alexa) for full remote functionality.

The Aqara Smart Lock U400 is, with an IP65-rated outer panel that resists dust and heavy rain. The Eufy Smart Lock C220 is rated IP53, which handles dust and light spray but is less sealed against powerful water. Both remain suitable for typical covered entryways.

Buy the Eufy Smart Lock C220 if you want an affordable, hub-free fingerprint deadbolt for a Google Home, Alexa or Home Assistant home, and you value long AA battery life and a strong owner rating over the Aqara Smart Lock U400's advanced UWB and Matter features.