Average score
Product 1: Aqara UWB Smart Lock U400
4.1
Product 2: Lockly Visage Zeno Series Smart...
4.1
Access logs
Product 1: Aqara UWB Smart Lock U400
4.5

Access logs are highlighted most clearly in app walkthroughs that show event histories for lock/unlock actions and alerts, supporting practical oversight for families and guest access.

Product 2: Lockly Visage Zeno Series Smart...
4.0

Access logs and history views are available in-app, though one reviewer noted multiple log views can be confusing rather than helpful.

Alarm/siren loudness (if included)
Product 1: Aqara UWB Smart Lock U400
3.7

The lock includes audible feedback and alarm-related settings (including volume/muting and Do Not Disturb in some ecosystems), but reviews do not deeply quantify siren loudness. The emphasis is on configurable audio cues rather than raw volume.

Product 2: Lockly Visage Zeno Series Smart...
No score yet
App
Product 1: Aqara UWB Smart Lock U400
4.1

The Aqara app is generally described as clean and functional for setup, settings, and firmware updates, and it can unlock extra features. Some reviewers still prefer living in Apple Home day-to-day, and a few mention minor friction (learning curve or occasional platform-specific bugs like code generation).

Product 2: Lockly Visage Zeno Series Smart...
3.7

Lockly Home offers a cleaner interface than older Lockly apps, but setup and navigation still feel uneven, with some settings hard to find and occasional crashes or quirks reported.

Auto-lock
Product 1: Aqara UWB Smart Lock U400
4.5

Auto-lock is widely supported and commonly used, with options ranging from immediate lock-on-close styles to time-based delays. Some reviewers note occasional timing quirks (door-close detection can take a few seconds or mis-time), so many recommend keeping a time-based auto-lock as a safety net.

Product 2: Lockly Visage Zeno Series Smart...
4.0

Auto-lock is configurable and works well when the door and strike are well-aligned, but some reports suggest it can fail or beep if the deadbolt does not slide smoothly. Facial recognition auto-unlock is the headline feature and is widely described as fast, reliable, and hard to spoof, working in bright sun, low light, and with sunglasses in most tests.

Auto-relock after failed attempts
Product 1: Aqara UWB Smart Lock U400
4.1

Beyond basic lockout behavior after repeated failed entries, some reviewers highlight safety behaviors like re-locking after remote/unattended unlock events. Where described, these features are positioned as thoughtful safeguards rather than headline features.

Product 2: Lockly Visage Zeno Series Smart...
No score yet
Backset compatibility
Product 1: Aqara UWB Smart Lock U400
4.5

Backset adjustability is explicitly demonstrated in at least one install-focused review, where the deadbolt length can be adjusted to center properly in the door prep.

Product 2: Lockly Visage Zeno Series Smart...
4.5

Backset appears adjustable for common 2 3/8-inch and 2 3/4-inch configurations, as shown in installation guidance.

Battery
Product 1: Aqara UWB Smart Lock U400
4.3

Battery life is typically characterized as around six months per charge, with strong praise for USB-C charging and emergency external power options. A recurring concern is the practicality of spare/replaceable rechargeable packs compared with swapping AA batteries.

Product 2: Lockly Visage Zeno Series Smart...
4.1

Rechargeable battery packs (often with a spare included) reduce downtime, but real-world longevity varies by settings like always-on face scanning and Wi-Fi usage, ranging from weeks in max scanning mode to months with power saving.

Bluetooth
Product 1: Aqara UWB Smart Lock U400
3.5

Bluetooth is present and often used for certain local interactions or setup flows, but reviewers generally position Thread/UWB as the main performance story. Some call out Bluetooth-based auto-unlock on other locks as unreliable compared with UWB.

Product 2: Lockly Visage Zeno Series Smart...
3.8

Bluetooth is required for initial setup and enrolling faces/fingerprints; it usually works, though some reviewers reported short connection windows or limited range (and noted the use of older Bluetooth versions).

Build quality and durability
Product 1: Aqara UWB Smart Lock U400
4.4

Build quality impressions are generally positive, with several reviewers describing the lock as solid and well made. Some note that aesthetics are subjective (larger, clearly a smart lock), and at least one review references the enclosure/material feel as less premium than a truly metal-bodied alternative.

Product 2: Lockly Visage Zeno Series Smart...
4.4

Build quality is often described as sturdy and premium (zinc alloy and a substantial feel), even when reviewers disagree about the aesthetics or bulk.

Door-sense
Product 1: Aqara UWB Smart Lock U400
4.2

Door-sense behavior is frequently mentioned: the lock can infer door closed/open states for automation and lock-on-close style behavior, though at least one review notes that door state may not always be exposed to every smart-home platform as a simple contact sensor would be.

Product 2: Lockly Visage Zeno Series Smart...
3.5

The included wired door-sense/contact sensor is accurate but often criticized for looking inelegant and adding extra wiring; some users wish it were built-in or removable.

Door compatibility (deadbolt fit)
Product 1: Aqara UWB Smart Lock U400
4.2

Most reviews indicate compatibility with standard deadbolt doors, and several note included adapters/rings to handle different bore sizes. Because it replaces the full lock assembly, it may be less suitable for situations where you must keep existing exterior hardware (some apartments/condos).

Product 2: Lockly Visage Zeno Series Smart...
3.9

Door compatibility is typical for a full deadbolt swap, but the lock performs best when the door closes cleanly and the bolt slides smoothly into the strike.

Existing hardware reuse
Product 1: Aqara UWB Smart Lock U400
3.4

Because the U400 replaces the full deadbolt hardware, it is not a retrofit-only upgrade. Some installers highlight included plates/adapters that can reduce the need for extra drilling in certain scenarios, but overall it is less about reusing existing deadbolt hardware and more about replacing it cleanly.

Product 2: Lockly Visage Zeno Series Smart...
4.1

It installs as a standard deadbolt replacement, and some reviewers noted they could reuse existing cutouts or sensor placements from prior locks, reducing additional door work.

Feature additions via updates
Product 1: Aqara UWB Smart Lock U400
4.1

Firmware updates and future-facing standards are frequently referenced, including ongoing updates, Aliro readiness, and platform-driven improvements. A few reviewers mention update friction in some apps, suggesting the manufacturer app may be the smoother path at times.

Product 2: Lockly Visage Zeno Series Smart...
3.8

Several reviewers referenced firmware/app updates (or promised updates) aimed at improving setup reliability and usability, suggesting the experience can change over time.

Fingerprint
Product 1: Aqara UWB Smart Lock U400
4.4

Fingerprint performance is repeatedly described as quick and accurate, often serving as the preferred backup method even for users who primarily rely on UWB. Several reviews note that fingerprint enrollment can be handled via the app or directly on-lock in certain workflows.

Product 2: Lockly Visage Zeno Series Smart...
4.3

Fingerprint unlock is typically quick and accurate, though at least one reviewer found it hit-or-miss depending on finger angle and the scanner’s placement.

Finish durability
Product 1: Aqara UWB Smart Lock U400
4.2

Finish observations focus more on appearance and fingerprint/smudge resistance than on long-term wear. Where mentioned, reviewers appreciate a finish that resists fingerprints and looks clean day-to-day.

Product 2: Lockly Visage Zeno Series Smart...
No score yet
Geofencing
Product 1: Aqara UWB Smart Lock U400
2.5

Geofencing is mostly discussed as a negative point for older smart locks, with reviewers favoring UWB because it avoids the unreliable behavior they experienced from Bluetooth/geofence auto-unlock systems.

Product 2: Lockly Visage Zeno Series Smart...
No score yet
Guest Codes and Access
Product 1: Aqara UWB Smart Lock U400
4.3

Guest access is a strong area: reviewers mention multiple PINs, temporary/one-time codes, time-limited schedules, and in Apple Home the ability to share Home Key-style access. Some NFC accessories may be optional purchases depending on the setup.

Product 2: Lockly Visage Zeno Series Smart...
4.2

Guest access is robust, including multiple user PINs, time-restricted or one-time codes, and in some cases offline codes or shared digital keys depending on platform.

Hub requirement
Product 1: Aqara UWB Smart Lock U400
4.0

A Thread border router is commonly described as effectively required to get meaningful Matter/Thread functionality and remote control in third-party platforms. Aqara hubs are optional but can add Aqara-app remote access and certain integrations.

Product 2: Lockly Visage Zeno Series Smart...
4.5

The Visage’s built-in Wi-Fi means no separate hub is required, a clear upgrade over older hub-dependent smart locks.

Installation and Setup
Product 1: Aqara UWB Smart Lock U400
4.2

Installation is typically described as straightforward for a full deadbolt replacement, often quoted in the 15–45 minute range depending on door fit and experience. Minor pain points include tight wiring routes, small screws, and occasional door-prep quirks (latch recess/backset adjustments).

Product 2: Lockly Visage Zeno Series Smart...
3.9

Installation is generally DIY-friendly with good templates and guides, but several reviewers said the process can be lengthy and cable management inside the housing can be frustrating.

Jam detection
Product 1: Aqara UWB Smart Lock U400
No score yet
Product 2: Lockly Visage Zeno Series Smart...
4.0

Jam detection/alerts are mentioned as part of the notification set, allowing you to be warned if the lock reports a jam or locking issue.

Key override reliability
Product 1: Aqara UWB Smart Lock U400
4.0

Physical key access is treated as an important fallback, with the keyway often hidden behind a sliding cover. Reviewers generally expect it to be dependable even if they rarely use it.

Product 2: Lockly Visage Zeno Series Smart...
4.1

Backup entry options include a physical key and a USB-C emergency power port, which reviewers view as important failsafes.

Keypad
Product 1: Aqara UWB Smart Lock U400
4.1

The keypad is commonly praised for a stealth look (numbers hidden until activated) and reliable entry, though multiple reviewers mention occasional wake sensitivity where it may take an extra tap before accepting input.

Product 2: Lockly Visage Zeno Series Smart...
4.3

The PIN Genie keypad improves security by shuffling digits, but it can slow entry and increase mistakes compared with a normal keypad.

Keyway quality
Product 1: Aqara UWB Smart Lock U400
3.9

Keyway design is typically described as discreet (hidden behind a panel) and practical as a backup. Rekeyability is explicitly called out in at least one review as a convenience for matching house keys.

Product 2: Lockly Visage Zeno Series Smart...
3.9

The key cylinder is rekeyable (noted as a 5-pin style in some videos), though rekeying may take extra time due to seals and screws.

Lock/unlock speed
Product 1: Aqara UWB Smart Lock U400
4.7

Speed is a recurring compliment: Thread-based control is often described as instant or very responsive, and UWB unlock triggers early enough that users can keep walking without pausing at the door.

Product 2: Lockly Visage Zeno Series Smart...
4.6

Unlock speed is frequently described as near-instant for face and fingerprint (around 1–2 seconds), while keypad entry is slower due to the shuffled layout.

Locking motor
Product 1: Aqara UWB Smart Lock U400
No score yet
Product 2: Lockly Visage Zeno Series Smart...
4.0

Motor noise is still present, but at least one reviewer noted it is noticeably quieter than older Lockly models.

Locking reliability
Product 1: Aqara UWB Smart Lock U400
4.7

Locking reliability is strongly rated across reviews, especially for UWB unlocking and routine locking/unlocking in Apple Home. Minor inconsistencies appear more around door-close auto-lock timing rather than core lock actuation failures.

Product 2: Lockly Visage Zeno Series Smart...
4.5

Day-to-day locking reliability is mostly strong, especially for face unlock, though a minority of reviewers mention occasional Wi-Fi/app reliability issues or mechanical smoothness sensitivities.

Notifications
Product 1: Aqara UWB Smart Lock U400
4.4

Notifications and alerts are frequently mentioned, including lock/unlock confirmations, door left open/unlocked warnings, and watch-based prompts that can even enable quick relocking. Some audio/alert behavior can be tuned with modes like Do Not Disturb in certain ecosystems.

Product 2: Lockly Visage Zeno Series Smart...
3.8

Notifications are flexible (lock/unlock, auto-lock, and sometimes jam alerts), but they can be noisy, leading some users to dial them back or disable duplicates across apps.

Physical attack resistance
Product 1: Aqara UWB Smart Lock U400
3.2

Several reviews cite the U400 as BHMA Grade 3, which is a basic certification tier. Reviewers generally accept it for typical residential use but note it is not the top choice if you are prioritizing maximum forced-entry resistance.

Product 2: Lockly Visage Zeno Series Smart...
3.6

Physical security is described as solid, with references to ANSI Level 2 requirements, though at least one review noted the lock may not be formally certified, making it harder to validate beyond manufacturer claims.

Pick/drill resistance (if rated)
Product 1: Aqara UWB Smart Lock U400
3.2

Rather than detailed pick/drill testing, reviewers lean on the BHMA Grade 3 reference as the primary proxy for physical resistance. It is acknowledged as better than nothing but not the highest tier available.

Product 2: Lockly Visage Zeno Series Smart...
No score yet
Remote access
Product 1: Aqara UWB Smart Lock U400
4.2

Remote access is generally reliable when the lock is paired through a Thread-enabled smart-home platform (like Apple Home) or when used with an Aqara hub for Aqara-app remote control. Without that infrastructure, functionality is described as more local and limited.

Product 2: Lockly Visage Zeno Series Smart...
4.1

Remote access via Wi-Fi/app is generally quick for lock/unlock and status checks, but some reviewers experienced occasional remote unavailability during testing.

Security features (encryption)
Product 1: Aqara UWB Smart Lock U400
4.3

Security discussions center on UWB precision and anti-relay style benefits compared with Bluetooth-based proximity unlocking. Reviewers frame UWB as more intent-aware and harder to spoof in typical use than older Bluetooth/geofence approaches.

Product 2: Lockly Visage Zeno Series Smart...
4.3

Security is reinforced by 3D facial scanning that resists photo spoofing, encrypted data handling claims, and the PIN Genie keypad design that reduces shoulder-surfing risk.

Smart-home integration (Alexa, Google, Siri, HomeKit, Matter, Thread)
Product 1: Aqara UWB Smart Lock U400
4.8

Smart-home integration is a major strength: Matter over Thread is repeatedly cited for broad compatibility (Apple Home, Google Home, Alexa, SmartThings, Home Assistant) and responsive local control. Apple Home Key is central to the best experience for Apple users.

Product 2: Lockly Visage Zeno Series Smart...
4.5

Integration is a major strength, with support for Apple Home/Home Key plus Alexa and Google; reviewers generally found commands and automations responsive once set up.

Tamper detection sensitivity
Product 1: Aqara UWB Smart Lock U400
4.0

Tamper-related behavior is referenced through lockout timers, alerts for unusual conditions (like too many failed attempts or door left unlocked), and forced-entry style notifications in some setups. Detailed sensitivity tuning is not consistently covered, but protective behaviors are present.

Product 2: Lockly Visage Zeno Series Smart...
No score yet
Touchscreen
Product 1: Aqara UWB Smart Lock U400
4.1

As a touch interface, the hidden keypad generally works well, but wake-up responsiveness is a recurring minor quirk across reviews. Once active, entering codes is typically smooth and reliable.

Product 2: Lockly Visage Zeno Series Smart...
4.4

The touchscreen is used for PIN entry and Home Key tapping; reviewers generally describe it as responsive and easy to read.

User access management
Product 1: Aqara UWB Smart Lock U400
4.3

User access management is repeatedly described as flexible, with role-based controls in Aqara and a more constrained but still practical set of limits in Matter-based ecosystems. For most households, the practical user and credential limits are viewed as sufficient.

Product 2: Lockly Visage Zeno Series Smart...
4.0

User management is a strong point, with support for multiple users and methods (faces, fingerprints, PINs), though some reviewers found the workflow confusing at first until updates improved it.

Value and Price
Product 1: Aqara UWB Smart Lock U400
3.9

Pricing is often framed around a roughly $270 tier: some call it reasonable for first-to-market UWB convenience, while others label it pricey compared with strong fingerprint-first alternatives. The perceived value rises sharply for Apple Home users who will actually use UWB daily.

Product 2: Lockly Visage Zeno Series Smart...
3.7

At roughly $349, it sits at the premium end; many reviewers feel the feature set earns the price, while others think it is hard to justify without built-in video doorbell functionality.

Voice control
Product 1: Aqara UWB Smart Lock U400
4.5

Voice control is commonly described as available through connected ecosystems (notably Siri in Apple Home, and also Alexa/Google in Matter setups), making lock status checks and basic locking actions convenient hands-free.

Product 2: Lockly Visage Zeno Series Smart...
4.2

Voice control works with Alexa, Google, and Siri (via Apple Home), and reviewers commonly reported responsive lock/unlock commands and routine support.

Weather resistance
Product 1: Aqara UWB Smart Lock U400
4.5

Weather resistance is repeatedly supported by references to an IP65 rating for the exterior keypad panel, and at least one long-use review reports stable performance across rain, snow, ice, and temperature swings.

Product 2: Lockly Visage Zeno Series Smart...
4.3

Weather protection is positioned as strong, with an IPX5 rating cited and settings like Rain mode intended to prevent false keypad triggers.

Wi-Fi
Product 1: Aqara UWB Smart Lock U400
3.0

Wi-Fi is commonly referenced in comparisons: Thread is described as faster and more battery-friendly than typical Wi-Fi smart locks. The U400 is generally not treated as a Wi-Fi-first lock, so remote features are expected to come via Thread border routers or hubs instead of direct Wi-Fi.

Product 2: Lockly Visage Zeno Series Smart...
3.9

Built-in 2.4GHz Wi-Fi enables remote control without a hub, but a few reviewers saw intermittent connectivity or early firmware hiccups; power-saving modes can reduce Wi-Fi use to extend battery life.