Compare Aqara UWB Smart Lock U400 vs Yale August Smart Lock

The activity log was useful in one review, but another reviewer reported a serious failure where an unlock event was not logged.

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.

The app was widely praised as intuitive, responsive, and feature-rich, though one reviewer had severe app freezing during setup.

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

Auto-lock was one of the strongest features, praised for flexibility and peace of mind, though one reviewer disabled it because it could lock them out.

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

Battery life was the most consistent weakness, with repeated concern about CR123 batteries, shorter lifespan, replacement cost, and one six-to-eight-week real-world result.

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.

Bluetooth-range control was described as responsive in one review, with the lock reacting nearly immediately when pressed.

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

Build quality drew praise where discussed, with reviewers calling out high-quality materials and a solidly built feel.

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.

DoorSense was praised when it worked and was considered worth installing, but one reviewer reported repeated calibration failures and incorrect open/closed status.

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

Reviewers valued the retrofit deadbolt fit for renters and existing-door setups, though one installation was complicated by tight door trim.

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.

Keeping the outside hardware and existing deadbolt was repeatedly praised, especially for renters, maintenance access, and preserving exterior appearance.

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

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

Fingerprint entry was treated as a missing keyless feature rather than a strength of this lock.

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

Geofencing and auto-unlock were the most mixed smart feature: some reviewers found it handy or excellent, while others found it slow, inconsistent, or stopped working.

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

Guest access was easy and useful, with virtual keys, sharing by text, and scheduled codes highlighted positively.

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.

Reviewers liked that built-in Wi-Fi removes the need for an add-on bridge or Connect module.

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 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.

Most reviewers found setup easy, quick, and well guided by the app, with one strong dissent reporting freezes, verification issues, and calibration trouble.

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

The retained physical key was useful as a fallback and for renters, but one long-term tester still ended up carrying keys because smart unlocking was not fast enough.

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 optional keypad works and can be useful, but reviewers noted it is not included and may disappoint buyers who want a built-in keypad experience.

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

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

App/manual locking was often described as instant, smooth, or quick, but one reviewer found physical keys faster than app, Siri, or watch workflows.

The motor was praised for quiet operation in PCMag testing.

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

Locking reliability was excellent in most formal testing and one six-month review, but one reviewer reported serious state confusion and unreliable locking status.

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

Notifications were a clear strength, with reviewers praising flexible smart alerts, quick push alerts, and better door-status awareness.

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.

Physical security received strong praise from TechGearLab, which highlighted the ANSI Grade 1 strength rating and intruder resistance.

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

Remote access was praised as convenient for controlling the lock from elsewhere in the house or anywhere with a phone connection.

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

Security software features were reassuring in the CNET review, especially authentication and encryption protections around the app and account.

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

Smart-home integration was broad and often praised, but Alexa/Google setup hitches, HomeKit offline issues, and one severe HomeKit complaint made reliability mixed.

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

The lack of a built-in outside touchpad/touchscreen was a drawback for the reviewer who preferred that style of lock.

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

User access management was praised for free virtual keys and scheduled access codes.

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

Value was mixed: several reviewers called it pricey but worthwhile, while others weighed the high price against batteries, keypad add-ons, and reliability frustrations.

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

Voice control worked quickly in one test and was supported broadly, but other reviewers reported password recognition issues or slow/failing Siri and Google Assistant use.

Support was viewed positively through a resolved battery-warning bug and confidence that August/Assa Abloy support would keep software maintained.

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.

Built-in Wi-Fi was praised for freshness, range, and eliminating a bridge, but reviewers tied it to battery drain and one reported mesh/Wi-Fi frustration.