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Aqara UWB Smart Lock U400, Matter Over Thread, Apple Home Key, Fingerprint Keyless ...

TLDR Review: Aqara UWB Smart Lock U400

By ShopSavvy Team

Published: September 18th, 2026

Pros

•Seamless integration with Apple ecosystem makes setup and use super easy for iPhone and Apple Watch users
•UWB (Ultrideband) technology enables quick, automatic unlocking as you approach the door, offering high convenience
•Multiple access options, including fingerprint, passcode, physical key, and automatic unlocking, provide versatile convenience
•Rechargeable battery eliminates the need for disposable batteries and simplifies maintenance
•Easy installation and setup process, saving time and effort
•Reliable Wi connection with no drops for over four weeks, reducing false alerts
•Physical key included as a backup method for unlocking
•The lock significantly improves on older models in terms of convenience and reliability
•The product is praised for overall excellent performance and user satisfaction
•Includes a thread hub for enhanced connectivity and futurroofing

Cons

•UWB (Ultrideband) unlocking works reliably about 90% of the time; occasional glitches are reported
•Full functionality requires the included thread border hub; using other hubs might limit features
•Firmware updates are only available via the included hub, not through other connected devices like smart TVs
•Battery life and lonerm durability are still under observation; only initial positive results reported
•Might be overkill for users without Apple devices or an Apple network at home, as sharing features depend on Apple ecosystem
•Some features could be limited if not set up properly before integrating with HomeKit
•Slight complexity in initial setup for nopple users or those unfamiliar with smart locks

Bottom Line

The Aqara UWB Smart Lock U400 is a top-tier option for Apple ecosystem enthusiasts, especially with its ultra-wideband technology that unlocks your door as you approach—talk about futuristic convenience. Its flexible access methods and easy setup make it a no-brainer, but keep in mind that full features depend on the included thread hub, and occasional glitches in UWB performance can happen. If you’re deep into the Apple smart home setup, this lock is a strong contender and might be the best smart lock available in 2026. If you don't use Apple devices, a more basic lock with fingerprint and keypad might be worth considering instead.

Available at Amazon

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How we researched this

About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from thousands of retailers to give you the short version.

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