Compare Aqara UWB Smart Lock U400 vs eufy Video Smart Lock S330

Access logs were useful for seeing who came and went and which credential unlocked the door.

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 usually described as smooth, easy, useful, or user-friendly across reviews.

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 valued for peace of mind, though one reviewer cautioned against using timed auto-lock without reliable door-position awareness.

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 generally praised as long-lasting, though full charging can take several hours.

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

Reviewers consistently praised the heavy, metal-feeling construction and durable build.

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.

Camera and doorbell performance was generally strong, especially video clarity, but motion timing, distance, and visitor button clarity were recurring caveats.

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.

Door-sense evidence was mixed: departure detection was useful, but one reviewer criticized the lock for not knowing whether the door was open.

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

Door fit was context-dependent: some installations worked smoothly, while shallow strike plates, alignment, and size constraints caused problems.

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.

A post-review feature addition impressed one long-term reviewer by making live-view unlocking more convenient.

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

Fingerprint performance was strongly positive in most reviews, but one reviewer had repeated failed reads.

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

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

Guest access was a standout use case, with reviewers liking temporary access, contractor use, and removable access.

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.

The required bridge/chime was viewed positively when it improved chime, storage, or camera-feed experience.

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

Design was generally liked for its sleek or elegant look, though its large size stood out as a drawback.

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.

Installation was often described as easy or manageable, but door fit and alignment created trouble for some reviewers.

One reviewer found jam reporting annoying because a calibration issue made the app keep showing the lock as jammed.

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

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

Keypad and touchpad feedback was mostly positive, though one reviewer had wake-up/tap responsiveness issues.

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.

When working well, unlocking was described as instant or very fast, especially through fingerprint recognition.

Motor feedback was split: one long-term reviewer found it solid, while another warned that small alignment resistance could stop locking.

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

Reliability was mixed, ranging from flawless and better-than-prior locks to failures when alignment or one-touch locking was imperfect.

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

Notifications were mostly praised as quick and useful, but some reviewers reported missed or delayed motion events.

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 impressions were positive, centered on wanting a sturdier alternative to flimsy plastic doorbells.

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 a clear strength, with reviewers valuing lock control from the app while away.

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

Security/encryption evidence was limited but noted an encryption message before streaming, alongside privacy caution.

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 mixed because Alexa/Google support was useful, but reviewers noted the lack of Apple HomeKit, IFTTT, or Matter.

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

Touchscreen feedback was split between responsive operation and needing repeated taps to wake it.

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

User management evidence was positive, especially around quickly adding additional users.

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

Most reviewers considered the price fair for the combined lock, camera, doorbell, fingerprint, and no-extra-fee package.

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 performed well in the one review that tested it directly.

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 performance had limited but strong evidence, with one reviewer reporting no live-view latency.