The Aqara Smart Lock U400 ($269.99) is a top pick with a 9.5/10 consensus score across 6 expert reviews. Experts highlight only lock pairing uwb time-of-flight with apple home key express for true hands-free entry and matter over thread is local mesh, so it keeps working through an internet outage. Best for: Apple buyers who want true UWB hands-free walk-up entry.
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Aqara Smart Lock U400
Apple Home Key Smart Lock (UWB)
SmartHomeExplorer proprietary rating
6 expert sources
The Aqara Smart Lock U400 earns a SHE Score of 7.4/10, driven by strong value (9.5/10) with room to improve in compatibility breadth (5/10). Based on 6 expert sources and SmartHomeExplorer compatibility analysis.
How we calculate the SHE Score →Expert Consensus: 9.5/10 across 6 sources
Last verified:Key Features
- ✓ UWB time-of-flight auto-unlock wired into Home Key Express
- ✓ Matter over Thread, native in Apple Home
- ✓ Fingerprint reader plus touchscreen keypad
- ✓ Home Key power-reserve tap
Best For
What Experts Agree On
What Experts Love
- ✓ Only lock pairing UWB time-of-flight with Apple Home Key Express for true hands-free entry
- ✓ Matter over Thread is local mesh, so it keeps working through an internet outage
- ✓ Three independent fallbacks: fingerprint, keypad code, and Home Key power-reserve tap
- ✓ First lock to pass the Aliro 1.0 secure-credential standard
Common Criticisms
- ✗ BHMA Grade 3 bolt trails the Grade 1 picks on raw force resistance
- ✗ Roughly 6 month battery is shorter than the Ultraloq Bolt Mission's 12-18 months
- ✗ UWB hands-free requires an iPhone 11 or newer with a UWB chip
What The Experts Say
Ready to buy the Aqara Smart Lock U400?
Check Price on Amazon$269.99 · 6 expert sources · 9.5/10 consensus
Frequently Asked Questions
Is the Aqara Smart Lock U400 worth it?
Aqara Smart Lock U400 earns a 9.5/10 consensus score across our 12 expert sources. It is rated "Must Buy" — Apple buyers who want true UWB hands-free walk-up entry. At $269.99, it ranks among the top picks in its category.
Who is the Aqara Smart Lock U400 best for?
Aqara Smart Lock U400 is best for: Apple buyers who want true UWB hands-free walk-up entry. Experts rate it "Must Buy" overall.
How does the Aqara Smart Lock U400 compare to other Security options?
Among the Security products we have reviewed, Aqara Smart Lock U400 ranks above average with a 9.5/10 score. See our full category comparison for more details.
What smart home systems does the Aqara Smart Lock U400 work with?
Aqara Smart Lock U400 works with Matter. Check our compatibility notes on the product page for any setup requirements or hub dependencies.
What are the pros and cons of the Aqara Smart Lock U400?
The main pros of the Aqara Smart Lock U400 are only lock pairing uwb time-of-flight with apple home key express for true hands-free entry and matter over thread is local mesh, so it keeps working through an internet outage. The main downside is bhma grade 3 bolt trails the grade 1 picks on raw force resistance. Overall, experts rate it "Must Buy" with a 9.5/10 consensus score.
Affiliate disclosure: SmartHomeExplorer.com participates in the Amazon Associates program. We earn a commission from qualifying purchases at no extra cost to you. This consensus review is based on 6 independent expert reviews — we did not test this product ourselves. Always verify current prices and availability before purchasing.