Aqara Smart Lock U400 vs Eufy Security Smart Lock S230

The Aqara Smart Lock U400 comes out ahead overall, with broader connectivity, more platform integrations and more unlock methods, including its signature ultra-wideband hands-free entry. The Eufy Security Smart Lock S230 makes up for it with a lower price, a higher owner rating and longer battery life, so the right pick depends on whether features or value matter more to you.

Unlock technology. The Aqara Smart Lock U400 is built around ultra-wideband hands-free entry that unlocks as you approach with an Apple device, on top of fingerprint, keypad, NFC, Bluetooth and Apple Home Key. The Eufy Security Smart Lock S230 sticks to fingerprint, keypad and a physical key, but does it with built-in Wi-Fi that needs no separate hub.

The Aqara Smart Lock U400 needs a Thread border router for remote access and full Apple Home Key functionality, and Google Home or Alexa control specifically requires an Aqara Hub. The Eufy Security Smart Lock S230 has Wi-Fi built into the lock itself, so it works remotely with no hub at all.

The Eufy Security Smart Lock S230, whose built-in rechargeable battery is rated to last around twice as long per charge as the Aqara Smart Lock U400's.

Apple Home households with a Thread hub already in place who want the newest, fastest way to unlock a door, especially the hands-free ultra-wideband trick, and who value having the most unlock methods available.

Buyers who want a simpler, more affordable fingerprint deadbolt with a stronger owner rating and no hub required, and who do not need ultra-wideband unlocking or the U400's wider platform support.