Compare Lockly Secure Plus Smart Lock vs Aqara UWB Smart Lock U400

Reviewers who discussed logs liked the recordkeeping, citing accurate history entries and even a year of usable activity history.

The app was generally considered easy, clear, and responsive, though one review separated that from a difficult guest-code workflow.

The Aqara app was seen as useful and feature-rich, but reviewers also flagged setup complexity, a Matter-code issue, and a learning curve for customization.

Auto-lock has limited but strong evidence, with PCMag reporting that the feature worked very well in testing.

Auto-lock was broadly praised and often described as reliable or well implemented, though one reviewer found Aqara app close-detection sometimes delayed.

Battery evidence is limited to one long-term review, but that reviewer called performance stellar after about a year of use.

Battery feedback was mostly positive for USB-C charging, removable/rechargeable design, and long runtime, tempered by concerns about spare or replacement batteries.

Bluetooth evidence is positive, with stable connectivity and unusually quick app response over Bluetooth range.

Bluetooth-only use was judged weak for this lock because reviewers saw the U400's main value in Thread/UWB rather than basic Bluetooth operation.

Build quality was repeatedly praised as sturdy, well-built, strong, and rock solid.

Build quality was viewed positively, with reviewers describing a step up from earlier Aqara locks and solid, well-made hardware.

Camera and doorbell integration was described as practical when paired with Aqara or Apple Home video devices, letting users see visitors and unlock from one screen.

Door-sense evidence was limited but positive, centered on the built-in gyroscope knowing when the door closes so it can lock without an added sensor.

Compatibility evidence is positive but limited, with reviewers noting standard-door fit and successful single-doorknob replacement.

Door fit flexibility was helped by adapters/cross-bore support, with reviewers calling the physical fit detail useful for nonstandard openings.

One reviewer valued that the lock could mount without the kind of door drilling required by the previous lock, making the install feel friendlier to existing doors.

Feature-update evidence was limited but positive, with one reviewer saying Aqara is good about firmware updates.

Fingerprint access is the strongest feature across reviews, described as fast, accurate, responsive, effective, and unusually good.

Fingerprint access was consistently praised as quick, accurate, consistent, or convenient, especially as a backup when UWB is unavailable.

The exterior finish earned a positive note for resisting fingerprints better than expected.

Guest access is mixed: several reviewers liked the flexible access options, while one found temporary-code delivery convoluted and buggy.

Guest access was praised through Home app PIN management and temporary/neighbor-style access options.

The hub requirement is a drawback because remote and voice features require added hardware and cost.

Hub requirements were mixed: reviewers liked avoiding an Aqara hub in Apple Home, but still emphasized the need for a Thread border router for full functionality.

Design opinions are mixed: reviewers liked the attractive, premium look, but several also called the lock large, bulky, or obvious.

Industrial design was the most mixed area: reviewers liked the sleeker, more mature, minimal look, but others called it bulky, plain, or plastic-looking.

Installation is sharply mixed, ranging from simple, app-guided, and quick to unusually complicated and frustrating.

Installation was usually described as straightforward and fast, with several reviewers finishing quickly, though a few noted tight wiring, small screw holes, or a latch-area snag.

Key backup evidence is positive, with reviewers valuing physical-key and backup access as a practical fallback.

Reviewers liked retaining a physical-key fallback, framing it as a useful mechanical backup rather than a compromised smart-only design.

The keypad and PIN Genie concept were widely praised for security and usability, although one reviewer found the shifting layout disorienting.

The keypad was generally usable and responsive, but reviewers also found that it could take extra taps or touches to wake in some cases.

The keyway/cylinder was viewed positively because the reviewer liked that it could be rekeyed rather than forcing a full lock replacement.

Lock and unlock speed was consistently positive, with instant app response or unlocks taking only a couple of seconds.

Lock/unlock speed was one of the strongest themes, especially with UWB; reviewers described fast reactions, instant Home app response, and few delay caveats.

Motor evidence is limited, but PCMag praised the lock for relatively quiet operation.

Locking reliability is mixed: some testing found smooth, great performance, while Digital Trends encountered unresolved calibration errors.

Locking reliability was strongly praised, with reviewers repeatedly reporting flawless, rock-solid, or consistently smooth hands-free unlocking.

Notifications are a weakness in the limited evidence, with PCMag specifically missing push notification support.

Notifications earned praise for adding Apple Watch/iPhone confirmation and a quick relock option after UWB unlocks.

Physical attack resistance drew a caveat: the reviewer appreciated certification but clearly wished the U400 had a stronger Grade 2 rating instead of Grade 3.

Remote access is a repeated limitation because the lock lacks built-in internet control and needs extra Wi-Fi hardware.

Remote access was useful when configured, with one reviewer praising fast remote unlock and another noting Aqara-app remote control needs an Aqara hub.

Security evidence is positive, with praise for hack resistance and unusually comprehensive account-security setup.

Security features were praised around UWB precision, encryption-related safeguards, and prevention of unintended inside unlocks or relay-style weaknesses.

Smart-home integration is one of the clearest weaknesses, with repeated criticism of missing or limited platform support.

Smart-home integration was a major strength, with reviewers praising Apple Home, Matter over Thread, responsiveness, major ecosystem support, and future-looking compatibility.

The touchscreen evidence is positive, with reviewers praising seamless operation and responsive keypad behavior.

Touchscreen evidence was mixed, with one reviewer naming wake-up attempts as the main complaint.

User access management is mixed, combining flexible access options with one strong complaint about difficult PIN assignment.

User access management was positively reviewed for adequate household limits, more granular Aqara controls, and approachable local fingerprint setup.

Value is a common concern because reviewers repeatedly describe the lock, hub path, or overall package as expensive.

Value sentiment was favorable but conditional: reviewers called it worth the upgrade or routine-changing, while also noting the price can feel high.

Voice control is limited because it is not built in and depends on extra Wi-Fi hardware that reviewers criticized.

Voice control received limited but positive evidence, with a reviewer saying they wished they had the supported voice-control lock routine at home.

Warranty evidence is strongly positive, with Digital Trends calling it one of the best in the smart-lock market.

Weather resistance evidence is positive but limited to one review that judged the casing able to handle harsh conditions.

Weather resistance came across well: reviewers said it could face the elements, and one real-world test cited rain, snow, ice, and no missed performance.

Wi-Fi is mixed: the lack of built-in Wi-Fi is criticized, but one review found hub-connected Wi-Fi response very fast.