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

Reviewers who discussed logs found useful entry history, including how the lock opened and which fingerprint was used, with one transcript explicitly describing an activity log.

Access logs were directly supported by Aqara app evidence showing lock/unlock events and alerts.

The included chime can get loud enough for household alerts across rooms or floors, though reviewers discussed chime volume rather than a separate siren.

The app was generally praised as smooth, clean, user-friendly, and feature-rich, with live video, settings, and remote controls accessible from the phone.

App support was generally positive, with Aqara exposing advanced settings and Apple Home covering daily controls, though Aqara customization can take learning.

Auto-lock was repeatedly seen as a useful peace-of-mind feature, with timing and schedule controls, although one reviewer warned it may lock when the door is open.

Auto-lock received broad support through Apple Home timing options, Aqara lock-on-close behavior, and reviewers reporting reliable day-to-day operation.

Wrong-try protection and passcode lockout were clearly supported, giving the lock a configurable response after repeated failed attempts.

Backset support is well documented for common 2 3/8-inch and 2 3/4-inch sizes.

Backset and bore compatibility received direct support through adjustable backset comments and cross-bore adapter coverage.

Battery feedback was strongly positive overall, with multiple reviewers citing several months of use, USB-C charging, and only occasional recharges.

Battery feedback was strong: reviewers liked the removable rechargeable pack, USB-C charging, outside emergency power, and roughly six-month estimates.

Bluetooth is present through the included bridge, which PCMag says contains both Wi-Fi and Bluetooth radios.

Bluetooth was usually discussed as inferior to UWB or as a fallback/local setup path; reviewers favored Thread/UWB for precision and responsiveness.

Build quality was consistently described as sturdy, metal, heavy-duty, or durable, although the hardware is also physically large.

Build quality was mostly positive, with solid construction and improved design, though some reviewers still called out bulk, plastic feel, or ordinary styling.

Camera and doorbell performance were usually praised for 2K clarity and useful detection, but a few reviews reported missed, delayed, or weaker night events.

Camera and doorbell integration was practical but secondary, with Aqara cameras, doorbells, and live-video unlock workflows mentioned in several reviews.

Door-sense style features are mixed: one review praised leaving detection, while another said auto-lock did not know whether the door was open or closed.

Door-sense evidence came from the lock detecting open/closed state, using a gyroscope or built-in close detection, and enabling lock-on-close behavior.

Deadbolt fit is the biggest installation caveat: it replaces a standard deadbolt but can be sensitive to strike-plate depth, alignment, and size constraints.

Reviewers found standard deadbolt and door fit generally workable, with useful adapters, but full-replacement hardware and some door layouts can matter.

SafeWise explicitly noted that the existing deadbolt can be reused if the Eufy deadbolt does not fit flush.

Existing-hardware reuse is mixed: the lock replaces the whole deadbolt assembly, but some reviewers noted no extra drilling or strike-plate reuse in their installs.

At least one long-term reviewer observed a useful live-view unlocking feature added after the original review.

Feature-update evidence included firmware updates, Apple Home updates, Matter/Aliro readiness, and futureproofing claims.

Fingerprint performance was split: several reviewers called it fast and accurate, while PCWorld had repeated recognition problems.

Fingerprint performance was consistently praised as fast, accurate, convenient, and a strong fallback when UWB or Home Key was not used.

Finish feedback was limited but generally favorable for fingerprint resistance and clean looks, with one reviewer still noting the plastic appearance.

Geofencing or phone-proximity unlock was not available in the reviewed app experience; one reviewer specifically wished for it.

Geofencing evidence was mostly comparative: reviewers framed UWB as more precise and less dependent on unreliable Bluetooth/geofence workflows.

Guest access is a strength, with temporary passcodes, schedules, and easy programming mentioned across reviews.

Guest codes and access were widely supported through PINs, one-time passwords, Apple Home access sharing, NFC fobs, and temporary-user options.

The bridge/chime is central to the system: reviewers described it as included, useful for indoor chimes and storage, and in one case mandatory.

Hub requirements are a recurring caveat: most smart functionality needs a Thread border router, and Aqara-app remote control may require an Aqara hub.

Installation was mostly manageable and often easy, but several reviewers noted alignment, strike-plate depth, or two-handed handling challenges.

Installation was repeatedly described as straightforward for a standard deadbolt, though a few reviewers noted tight wiring, small screws, or door-prep caveats.

Jam detection can be frustrating when calibration or strike-plate depth is off, with one reviewer saying the app kept showing jammed despite a secure bolt.

Jam detection evidence was limited to Aqara automation conditions such as Not Fully Locked, which one reviewer interpreted as open or possibly jammed.

Key backup is well covered: reviewers repeatedly noted the hidden or included physical key option for emergencies.

Physical key backup was consistently confirmed as a reliable fallback alongside UWB, NFC, fingerprint, keypad, and app access.

The keypad generally worked well and supports PIN entry, though one review found the touchscreen sometimes needed extra wake-up taps.

The keypad was broadly functional and often hidden for a cleaner look, though several reviewers noted occasional wake or touch responsiveness quirks.

Keyway quality evidence centered on rekeyability, a usable physical cylinder, and hidden keyhole access rather than high-security keyway claims.

Lock and unlock speed was strong in favorable tests, especially through fingerprint access, with instant or very quick operation reported.

Unlock speed was one of the strongest themes: reviewers repeatedly described UWB and fingerprint unlocking as fast, seamless, or ready before reaching the door.

The motor can be sensitive to deadbolt alignment; one review warned it may fail to lock if the motor struggles.

Locking motor evidence was minimal, limited to a reviewer observing the motor actuating during hands-on setup.

Locking reliability ranged from flawless or year-long solid use to sensitivity when alignment was imperfect or one-touch locking failed.

Locking reliability was strongly supported across reviews, especially for UWB unlock-on-approach and Thread responsiveness, with only isolated caveats.

Notifications were generally fast and useful for activity, motion, lock/unlock events, and thumbnails, though one review noted delayed motion recording.

Notifications and alerts were supported through Apple Home unlock alerts, Apple Watch/iPhone notifications, and Aqara low-battery or lock-state alerts.

Physical resistance was not attack-tested, but the lock offers extra screws for added security and reviewers described sturdy hardware.

Physical attack resistance is only moderate: reviewers confirmed BHMA Grade 3 certification and noted it is the lowest BHMA level.

Remote access was a clear strength, with reviewers locking or unlocking from the app, even away from home.

Remote access was supported through Apple Home, Aqara hub/app workflows, and reviewer tests showing reliable remote unlocking where configured.

Security features include scramble passcodes, wrong-try protection, and an encryption message, while one review also mentioned broader Eufy privacy concerns.

Security-feature evidence focused on UWB's precise distance/direction awareness, reduced Bluetooth-style risks, and encryption-related comments.

Alexa and Google support were consistently reported, while reviewers also consistently noted missing HomeKit, IFTTT, and Matter support.

Smart-home integration was a core strength, with Matter over Thread plus Apple Home, Alexa, Google Home, SmartThings, Home Assistant, and Siri support.

Touchscreen and touchpad feedback was mixed, ranging from PCMag's responsive touchpad to PCWorld's wake-up issues.

Touchscreen feedback was mostly positive for hidden keypad usability, but some reviewers reported that it sometimes needed extra taps to wake.

User access management is strong, with high user/fingerprint limits, individual codes, and easy additional-user enrollment.

User access management was strong, with evidence for multiple users, roles, fingerprints, passwords, NFC devices, and time-limited access.

Reviewers generally found the price reasonable for the all-in-one lock, doorbell, camera, local storage, and no-fee value, while still calling it pricey.

Value and price were favorable but not universal: reviewers praised the UWB convenience and overall capability while noting price increases and battery-sourcing concerns.

Voice control works through Alexa and Google according to multiple reviews, but Apple ecosystem support is absent.

Voice control was supported through Siri, Alexa or Echo mentions, and Apple Home integration for lock commands.

Weather resistance is supported by an IP65 waterproof rating and operating-temperature claims in the reviewed materials.

Weather resistance was consistently supported by IP65 outdoor ratings and real-world exposure to rain, snow, ice, and temperature swings.

Wi-Fi works through the bridge and supports remote use, but reviewers noted 2.4GHz-only setup and dependence on the bridge/chime connection.

Wi-Fi was mostly relevant by absence: reviewers highlighted Thread as avoiding Wi-Fi load or Wi-Fi power draw rather than praising built-in Wi-Fi.