Aqara Smart Lock U400
The Aqara Smart Lock U400 is one of the most advanced smart locks of 2026, combining UWB hands-free entry, Matter over Thread, fingerprint access, and broad ecosystem support.
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- +UWB hands-free unlocking allows the door to unlock automatically as you approach
- +Matter over Thread support works across Apple Home, Google Home, Alexa, SmartThings, and Home Assistant
- +Multiple access methods including fingerprint, PIN, NFC, app, voice control, Apple Home Key, and physical key
- −UWB features require compatible Apple devices and a Thread-enabled Apple home hub
- −Newer product with less long-term owner history than Yale or Schlage
- −More advanced setup may feel overwhelming for basic users
The Aqara Smart Lock U400 is the most forward-looking smart lock in this comparison and a major upgrade over the older Aqara U100. Its standout feature is UWB hands-free unlocking, which can unlock the door automatically as an authorized user approaches with a compatible device. This makes it one of the few smart locks that moves beyond keypad, app, or tap-to-unlock convenience into true approach-based access. The U400 also supports Matter over Thread, giving it stronger long-term smart-home flexibility across Apple Home, Google Home, Amazon Alexa, Samsung SmartThings, Home Assistant, and other Matter ecosystems. For everyday use, it offers nearly every unlock method a household could want: fingerprint reader, keypad PIN, NFC, app control, voice assistant control, Apple Home Key, and traditional physical key backup. The rechargeable battery and weather-resistant exterior further strengthen its appeal for front-door use. However, its most advanced features come with requirements. UWB unlocking needs compatible iPhones or Apple Watches and a Thread-enabled Apple home hub, so not every household will benefit equally. It is also newer than long-established locks from Yale and Schlage, meaning it has less long-term reliability history. Still, for users who want the most advanced smart lock technology currently available in the US market, the Aqara U400 is one of the strongest choices for 2026.
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James has reviewed consumer electronics and gadgets for over 6 years. He specializes in audio equipment, cameras, and smart home devices.
Aqara Smart Lock U400 – FAQs
Yes, for most buyers. The Aqara Smart Lock U400 stands out for: UWB hands-free unlocking allows the door to unlock automatically as you approach and Matter over Thread support works across Apple Home, Google Home, Alexa, SmartThings, and Home Assistant. The main trade-offs are UWB features require compatible Apple devices and a Thread-enabled Apple home hub. Check our full Electronics and Gadgets comparison for alternatives.