Access logs
P1
Product 1: eufy Video Smart Lock S330
4.4
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.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.5
Access logs were consistently available and useful, showing who entered, when, and by what method across app, fingerprint, code, manual, and auto events.
Alarm/siren loudness (if included)
P1
Product 1: eufy Video Smart Lock S330
4.2
The included chime can get loud enough for household alerts across rooms or floors, though reviewers discussed chime volume rather than a separate siren.
P2Product 2: ULTRALOQ U-Bolt Pro Smart Lock
No score yetApp
P1
Product 1: eufy Video Smart Lock S330
4.3
The app was generally praised as smooth, clean, user-friendly, and feature-rich, with live video, settings, and remote controls accessible from the phone.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.2
The app enabled setup, locking, users, logs, notifications, and settings; reviews were mostly positive, but some criticized the UI, hiccups, or lost connections.
Auto-lock
P1
Product 1: eufy Video Smart Lock S330
4.4
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.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.4
Auto-lock was widely supported and configurable, but several reviewers warned that the default behavior can surprise or briefly lock users out during setup.
Auto-relock after failed attempts
P1
Product 1: eufy Video Smart Lock S330
4.2
Wrong-try protection and passcode lockout were clearly supported, giving the lock a configurable response after repeated failed attempts.
P2Product 2: ULTRALOQ U-Bolt Pro Smart Lock
No score yetBackset compatibility
P1
Product 1: eufy Video Smart Lock S330
4.6
Backset support is well documented for common 2 3/8-inch and 2 3/4-inch sizes.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.2
Backset support was documented for 2-3/8-inch and 2-3/4-inch setups, though one reviewer hit confusing stamped markings during adjustment.
Battery
P1
Product 1: eufy Video Smart Lock S330
4.2
Battery feedback was strongly positive overall, with multiple reviewers citing several months of use, USB-C charging, and only occasional recharges.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.2
Battery feedback was mostly positive thanks to AA cells, low-battery alerts, and emergency USB power, but several reviewers noted variable real-world life.
Bluetooth
P1
Product 1: eufy Video Smart Lock S330
4.0
Bluetooth is present through the included bridge, which PCMag says contains both Wi-Fi and Bluetooth radios.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.3
Bluetooth was consistently useful for pairing, local control, and bridge operation, with reviewers noting app pairing or onboard Bluetooth support.
Build quality and durability
P1
Product 1: eufy Video Smart Lock S330
4.4
Build quality was consistently described as sturdy, metal, heavy-duty, or durable, although the hardware is also physically large.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.4
Build impressions were mostly strong, with metal/heavy-duty comments and solid feel, but one reviewer described the unit as light plastic with a loud shaky action.
Camera and doorbell performance
P1
Product 1: eufy Video Smart Lock S330
4.2
Camera and doorbell performance were usually praised for 2K clarity and useful detection, but a few reviews reported missed, delayed, or weaker night events.
P2Product 2: ULTRALOQ U-Bolt Pro Smart Lock
No score yetDoor-sense
P1
Product 1: eufy Video Smart Lock S330
3.1
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.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.6
Door-sense evidence was strong for the Wi-Fi version, with reviewers using the included sensor for open/closed status and to prevent locking while ajar.
Door compatibility (deadbolt fit)
P1
Product 1: eufy Video Smart Lock S330
3.3
Deadbolt fit is the biggest installation caveat: it replaces a standard deadbolt but can be sensitive to strike-plate depth, alignment, and size constraints.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.4
The lock generally fit standard deadbolt doors and common left/right orientations, with reviewers citing standard door thickness or existing deadbolt prep as the main compatibility path.
Existing hardware reuse
P1
Product 1: eufy Video Smart Lock S330
4.2
SafeWise explicitly noted that the existing deadbolt can be reused if the Eufy deadbolt does not fit flush.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.5
Reviewers were able to use existing deadbolt prep or old lock locations, with no wiring or drilling required in the cleanest installs.
Feature additions via updates
P1
Product 1: eufy Video Smart Lock S330
4.0
At least one long-term reviewer observed a useful live-view unlocking feature added after the original review.
P2Product 2: ULTRALOQ U-Bolt Pro Smart Lock
No score yetFingerprint
P1
Product 1: eufy Video Smart Lock S330
4.3
Fingerprint performance was split: several reviewers called it fast and accurate, while PCWorld had repeated recognition problems.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.7
Fingerprint entry was the strongest consensus feature, with nearly every reviewer reporting fast, reliable, or flawless scans, except for angle sensitivity in one review.
Geofencing
P1
Product 1: eufy Video Smart Lock S330
2.0
Geofencing or phone-proximity unlock was not available in the reviewed app experience; one reviewer specifically wished for it.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.1
Geofencing and auto-unlock were split: several reviewers found it useful or improved, while others said it required distance thresholds, setup nuance, or failed outright.
Guest Codes and Access
P1
Product 1: eufy Video Smart Lock S330
4.4
Guest access is a strength, with temporary passcodes, schedules, and easy programming mentioned across reviews.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.6
Guest and temporary access was a clear strength for cleaners, dog sitters, rentals, Airbnb, and visitors, often with time/date limits or eKeys.
Hub requirement
P1
Product 1: eufy Video Smart Lock S330
3.9
The bridge/chime is central to the system: reviewers described it as included, useful for indoor chimes and storage, and in one case mandatory.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.0
Hub requirements varied by version: built-in Wi-Fi models avoided an extra bridge, while older or bridge-bundle versions needed a nearby adapter.
Installation and Setup
P1
Product 1: eufy Video Smart Lock S330
4.2
Installation was mostly manageable and often easy, but several reviewers noted alignment, strike-plate depth, or two-handed handling challenges.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.4
Most reviewers found installation straightforward, often under 30 minutes, but the older bridge-era review reported a difficult tailpiece/screw-tightness process and one review had hub pairing restarts.
Jam detection
P1
Product 1: eufy Video Smart Lock S330
2.6
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.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
3.4
Only one review gave direct jam-related evidence, noting an error message that can indicate a jam when the lock orientation is wrong.
Key override reliability
P1
Product 1: eufy Video Smart Lock S330
4.2
Key backup is well covered: reviewers repeatedly noted the hidden or included physical key option for emergencies.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.5
Nearly every reviewer valued the physical key backup, especially for dead batteries, lockout mode, or emergency entry.
Keypad
P1
Product 1: eufy Video Smart Lock S330
4.0
The keypad generally worked well and supports PIN entry, though one review found the touchscreen sometimes needed extra wake-up taps.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.5
The keypad was generally praised for anti-peep entry and tactile/physical buttons, although one reviewer found the circular layout slower than a normal keypad.
Lock/unlock speed
P1
Product 1: eufy Video Smart Lock S330
4.7
Lock and unlock speed was strong in favorable tests, especially through fingerprint access, with instant or very quick operation reported.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.8
Unlocking was repeatedly described as instant or quick, especially fingerprint entry, with several reviewers calling it one of the faster locks they tested.
Locking motor
P1
Product 1: eufy Video Smart Lock S330
2.7
The motor can be sensitive to deadbolt alignment; one review warned it may fail to lock if the motor struggles.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
3.6
Motor feedback was mixed: PCMag and Brian Unbox found smooth or quiet operation, while others called the action loud, shaky, or sensitive to installation strain.
Locking reliability
P1
Product 1: eufy Video Smart Lock S330
4.0
Locking reliability ranged from flawless or year-long solid use to sensitivity when alignment was imperfect or one-touch locking failed.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.6
Reliability was a major strength in most hands-on tests, especially fingerprint/keyless operation, though older setup bugs and alignment-related concerns appeared in a minority of reviews.
Notifications
P1
Product 1: eufy Video Smart Lock S330
4.3
Notifications were generally fast and useful for activity, motion, lock/unlock events, and thumbnails, though one review noted delayed motion recording.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.4
Notifications were useful for low battery, remote events, and entry alerts, though one reviewer disliked needing per-user notification rules.
Physical attack resistance
P1
Product 1: eufy Video Smart Lock S330
3.7
Physical resistance was not attack-tested, but the lock offers extra screws for added security and reviewers described sturdy hardware.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.2
Physical security evidence was mixed by version/source: some cited ANSI Grade 1 strength, while other reviews called it unrated or Grade 2/3-like.
Remote access
P1
Product 1: eufy Video Smart Lock S330
4.4
Remote access was a clear strength, with reviewers locking or unlocking from the app, even away from home.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.5
Remote access was widely valued for locking, unlocking, monitoring, and guest entry from away, but one review noted Bluetooth-only use loses smartphone control.
Security features (encryption)
P1
Product 1: eufy Video Smart Lock S330
4.1
Security features include scramble passcodes, wrong-try protection, and an encryption message, while one review also mentioned broader Eufy privacy concerns.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.5
Security features included AES/dynamic-key encryption, lockout mode, and anti-peep/randomized keypad entry, with one review highlighting dual-layer encryption.
Smart-home integration (Alexa, Google, Siri, HomeKit, Matter, Thread)
P1
Product 1: eufy Video Smart Lock S330
3.4
Alexa and Google support were consistently reported, while reviewers also consistently noted missing HomeKit, IFTTT, and Matter support.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.2
Smart-home support was broad for Alexa, Google Assistant, IFTTT, SmartThings, and routines, but lack of HomeKit and Amazon Key limited some ecosystems.
Two-factor authentication availability
P1Product 1: eufy Video Smart Lock S330
No score yet
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
2.0
Two-factor authentication was a weakness because the Reviewed transcript explicitly says the Ultraloq app lacks two-factor authentication.
User access management
P1
Product 1: eufy Video Smart Lock S330
4.4
User access management is strong, with high user/fingerprint limits, individual codes, and easy additional-user enrollment.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.6
User management was broad and flexible, covering admins, normal users, temporary users, fingerprints, passcodes, app access, and schedules.
Value and Price
P1
Product 1: eufy Video Smart Lock S330
4.1
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.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.4
Value was usually favorable because reviewers saw strong feature density for the price, although some noted it was expensive or dependent on sale/bridge configuration.
Voice control
P1
Product 1: eufy Video Smart Lock S330
4.2
Voice control works through Alexa and Google according to multiple reviews, but Apple ecosystem support is absent.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.5
Voice control worked through Alexa or Google in several reviews, usually with a voice code for unlocking, but HomeKit/Siri support was absent.
Weather resistance
P1
Product 1: eufy Video Smart Lock S330
4.6
Weather resistance is supported by an IP65 waterproof rating and operating-temperature claims in the reviewed materials.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.5
Weather resistance was supported by IP65 or dust/water claims across reviews, with some reviewers expecting it to handle outdoor exposure and temperature swings.
Wi-Fi
P1
Product 1: eufy Video Smart Lock S330
3.9
Wi-Fi works through the bridge and supports remote use, but reviewers noted 2.4GHz-only setup and dependence on the bridge/chime connection.
P2
Product 2: ULTRALOQ U-Bolt Pro Smart Lock
4.2
Wi-Fi was a major convenience when built in or paired through a bridge, but 2.4GHz-only setup and mesh/dual-band issues were the clearest repeated drawback.