Average score
Product 1: eufy Video Smart Lock S330
4.1
Product 2: Yale August Smart Lock
4.2
Access logs
Product 1: eufy Video Smart Lock S330
4.7

Access/activity logging is a practical strength in real use: reviewers mention seeing who unlocked/locked and, in some cases, which fingerprint/user performed the action.

Product 2: Yale August Smart Lock
3.9

Activity and access logs are generally presented as a clear timeline of lock events and users, but one negative review claims a late-night unlock incident did not appear in the log, raising consistency concerns in edge cases.

App
Product 1: eufy Video Smart Lock S330
4.4

The app is consistently described as clean and feature-rich, with detailed control over access, detection, notifications, and power modes. A recurring critique is that troubleshooting (especially calibration guidance) could be clearer, and some wanted phone-based tap/NFC unlock.

Product 2: Yale August Smart Lock
4.0

The app is generally described as intuitive and full-featured (status view, settings, guest management, alerts, and timelines), though one highly negative review reports freezing, connectivity frustration, and inconsistent state reporting.

Auto-lock
Product 1: eufy Video Smart Lock S330
4.2

Auto-lock is commonly praised for peace of mind and flexibility (including short delays and schedules). Some reviewers cautioned that auto-lock can be risky if your door isn’t reliably closed/aligned or if door state detection is imperfect.

Product 2: Yale August Smart Lock
4.5

Auto-lock is consistently praised for flexibility (from very short delays up to about 30 minutes) and for preventing accidentally-unlocked doors, but some users disable it to avoid being locked out when they step outside without phone or keys. Auto-unlock is a high-convenience feature when it behaves, but experiences vary: some reviews say it works well most of the time, while long-term users report it can be slow, inconsistent, or unreliable enough to fall back to physical keys.

Auto-relock after failed attempts
Product 1: eufy Video Smart Lock S330
4.3

Wrong-try protections are commonly described (lockdown/timeouts after multiple incorrect entries), helping reduce brute-force attempts and adding practical security beyond basic PIN entry.

Product 2: Yale August Smart Lock
No score yet
Backset compatibility
Product 1: eufy Video Smart Lock S330
4.5

Backset support is described as adjustable to common sizes (2 3/8 in and 2 3/4 in), which helps it fit typical deadbolt door prep.

Product 2: Yale August Smart Lock
No score yet
Battery
Product 1: eufy Video Smart Lock S330
4.4

Battery life is a highlight: the 10,000mAh rechargeable pack is repeatedly described as lasting months, with long-term users charging only a few times per year when tuned (for example, human-only motion). Charging can take hours and you may need to supply your own USB-C power gear.

Product 2: Yale August Smart Lock
3.1

Battery life is the most common tradeoff: the lock uses two CR123 batteries, and while some sources cite multi-month expectations, at least one long-term review reports significantly shorter life (weeks) and others note higher replacement cost and limited in-app visibility.

Bluetooth
Product 1: eufy Video Smart Lock S330
4.1

Bluetooth is commonly mentioned as part of the lock-to-bridge communication path. Reviewers generally describe it as functional, primarily as an invisible link in the overall system.

Product 2: Yale August Smart Lock
3.6

Bluetooth is used for close-range control and proximity-based features (including aspects of auto-unlock), and while it works well for many, some users describe occasional slow or inconsistent proximity behavior.

Build quality and durability
Product 1: eufy Video Smart Lock S330
4.4

Build quality is widely described as heavy-duty and mostly metal, but it is also frequently called large/bulky. One expert review wanted a bit more robustness to make it an easy, universal recommendation.

Product 2: Yale August Smart Lock
4.4

Build quality impressions are strong: the compact puck design is described as well-made with a good feel and improved aesthetics compared with older, bulkier generations.

Door-sense
Product 1: eufy Video Smart Lock S330
2.5

Door state awareness appears mixed: at least one reviewer warned the lock may not reliably know whether the door is open or closed, which matters if you rely heavily on auto-lock behaviors.

Product 2: Yale August Smart Lock
3.8

DoorSense/door-position sensing is often cited as useful and accurate for door-ajar alerts when installed and calibrated, but at least one reviewer reports persistent calibration problems and unreliable open/closed status detection.

Door compatibility (deadbolt fit)
Product 1: eufy Video Smart Lock S330
3.4

Door fit is usually straightforward, but some doors may need extra attention: shallow strike-plate depth can trigger calibration failures, and tight tolerances mean misalignment can prevent reliable locking.

Product 2: Yale August Smart Lock
No score yet
Existing hardware reuse
Product 1: eufy Video Smart Lock S330
4.2

At least one installation guide notes you may be able to reuse existing deadbolt hardware if it fits flush, reducing the need to replace every component.

Product 2: Yale August Smart Lock
5.0

Across reviews, the retrofit design is a standout: it replaces only the interior thumb-turn so you can keep your existing deadbolt, exterior look, and physical keys, which is especially appealing for renters and shared access situations.

Feature additions via updates
Product 1: eufy Video Smart Lock S330
4.5

At least one long-term reviewer highlighted meaningful feature additions via updates, such as unlocking directly from a live-view screen on supported cameras, improving day-to-day usability.

Product 2: Yale August Smart Lock
No score yet
Fingerprint
Product 1: eufy Video Smart Lock S330
4.4

Fingerprint performance is polarizing: several owners describe it as among the fastest and most accurate they have used, while one expert reviewer struggled with repeated reads and wished for clearer activation feedback (lighting).

Product 2: Yale August Smart Lock
No score yet
Geofencing
Product 1: eufy Video Smart Lock S330
No score yet
Product 2: Yale August Smart Lock
3.6

Geofencing underpins the arrival/leave automation and is viewed as helpful by some, but its success depends on the approach path, phone behavior, and Bluetooth handoff, leading to mixed real-world consistency.

Guest Codes and Access
Product 1: eufy Video Smart Lock S330
4.4

Guest access options are robust, including temporary or scheduled PIN codes and app-based access. Scramble passcode and other convenience/security options are frequently cited.

Product 2: Yale August Smart Lock
4.4

Guest access features are a strong point: reviews describe virtual keys, guest lists, temporary or scheduled access windows, and easy sharing (often via text/email), with keypad entry available as an add-on.

Hub requirement
Product 1: eufy Video Smart Lock S330
4.0

The required plug-in chime/bridge is a core part of the experience: it enables remote connectivity and local storage, and many liked having a loud indoor chime. Downsides include extra setup steps and needing to provide your own microSD card.

Product 2: Yale August Smart Lock
5.0

Because Wi-Fi is integrated, reviews emphasize there is no separate hub or bridge required for remote access, simplifying deployment compared with older generations that needed a plug-in module.

Installation and Setup
Product 1: eufy Video Smart Lock S330
4.2

Most reviewers found installation similar to other full deadbolt replacements and generally manageable, but a few called out real-world friction: needing a second set of hands, long firmware updates, and careful mechanical alignment to avoid errors or motor strain.

Product 2: Yale August Smart Lock
4.2

Most reviewers describe a fast install (around 10 minutes) with clear in-app guidance and straightforward calibration, but a minority report setup friction such as app freezes, verification hassles, or door-trim/fitment tweaks that required rework.

Jam detection
Product 1: eufy Video Smart Lock S330
2.8

Calibration and error states can present as jam-related warnings in the app for some installs, even when the deadbolt feels physically secure, creating nuisance alerts rather than true mechanical jams.

Product 2: Yale August Smart Lock
No score yet
Key override reliability
Product 1: eufy Video Smart Lock S330
No score yet
Product 2: Yale August Smart Lock
4.8

Physical key override remains an important safety net: reviews repeatedly note you can still unlock with a normal key if batteries die or smart features misbehave.

Keypad
Product 1: eufy Video Smart Lock S330
4.2

The keypad is generally considered easy and reliable for daily use, with extra security options like scramble passcodes. One reviewer noted occasional wake-up/tap sensitivity issues before the keypad became responsive.

Product 2: Yale August Smart Lock
3.7

A keypad is available but typically not included; reviewers say it works and is useful for kids or key-free entry, yet it adds cost and some find it small or slightly laggy compared with locks with built-in keypads.

Lock/unlock speed
Product 1: eufy Video Smart Lock S330
4.7

When the biometric reader works well, unlocks are described as extremely fast. However, experiences vary: some testers reported repeated attempts needed on the fingerprint sensor, while others called operation instant and consistent.

Product 2: Yale August Smart Lock
4.1

Most reviews describe fast, smooth, and quiet lock/unlock action via app or manual turn, though keypad entry can have a small delay and one reviewer reports freezes that interrupt responsiveness.

Locking motor
Product 1: eufy Video Smart Lock S330
4.2

The motor is sensitive to resistance: if the deadbolt/strike alignment is off, reviewers warned the motor may struggle or fail to complete a lock cycle. With good alignment, long-term users reported stable performance.

Product 2: Yale August Smart Lock
No score yet
Locking reliability
Product 1: eufy Video Smart Lock S330
4.2

Locking reliability is strong for many owners (including long-term use), but it is not universally flawless. Reported weak spots include finicky alignment/calibration states and occasional inconsistencies with certain external controls (like one-touch locking).

Product 2: Yale August Smart Lock
4.1

Locking reliability is rated highly in most tests after calibration, but a minority report the lock getting confused about state, inconsistent auto-unlock, or requiring occasional troubleshooting to restore dependable operation.

Notifications
Product 1: eufy Video Smart Lock S330
4.1

Notifications are configurable and usually fast, but not perfect: a few reviewers saw delayed starts to recorded events, occasional missed motion/loitering triggers, or tradeoffs between faster alerts vs alerts that include thumbnails.

Product 2: Yale August Smart Lock
4.1

Notifications and smart alerts are frequently described as timely and customizable (lock/unlock events, auto-lock events, door-ajar alerts, and user-specific actions), though one account complains about missed logging for a concerning event.

Physical attack resistance
Product 1: eufy Video Smart Lock S330
No score yet
Product 2: Yale August Smart Lock
4.8

One review cites top-tier physical strength (ANSI Grade 1) for the lock/bolt, framing it as unusually strong among smart locks tested.

Remote access
Product 1: eufy Video Smart Lock S330
4.5

Remote access is repeatedly described as convenient and reliable, including locking/unlocking from anywhere and checking lock status. Several reviewers highlighted using it for guests, contractors, or deliveries.

Product 2: Yale August Smart Lock
4.4

Remote lock/unlock from anywhere is widely reported to be responsive once connected, and even the most critical reviewer notes unlocking via the app itself generally worked; issues center more on setup/state tracking than basic remote commands.

Security features (encryption)
Product 1: eufy Video Smart Lock S330
4.0

Security and privacy discussion centers on local storage and app behavior; one reviewer noted an on-screen encryption message before video streams to the bridge. Overall, the product is framed as privacy-leaning due to non-subscription local storage, with some mention of broader brand scrutiny.

Product 2: Yale August Smart Lock
4.5

Security features discussed include encrypted connections (Bluetooth and app traffic) and safeguards like voice PIN requirements, contributing to reviewer confidence for typical smart-lock use.

Smart-home integration (Alexa, Google, Siri, HomeKit, Matter, Thread)
Product 1: eufy Video Smart Lock S330
3.4

Smart-home integration is limited compared to ecosystems that prioritize Apple: reviewers consistently note Alexa and Google support, but no Apple HomeKit, Matter, or IFTTT.

Product 2: Yale August Smart Lock
4.0

Smart-home integration is a core strength with support for Alexa, Google, and HomeKit (plus other ecosystems noted in reviews), though HomeKit stability and device state accuracy are not perfect for every user over time.

Touchscreen
Product 1: eufy Video Smart Lock S330
4.0

Touch controls are usually described as responsive and backlit, but at least one expert review reported needing multiple taps to wake the dark touchscreen at times.

Product 2: Yale August Smart Lock
No score yet
Two-factor authentication availability
Product 1: eufy Video Smart Lock S330
No score yet
Product 2: Yale August Smart Lock
4.5

Two-factor authentication is explicitly mentioned as available for account access, adding protection for cloud-connected control and sharing features.

User access management
Product 1: eufy Video Smart Lock S330
4.3

User management is broadly praised, including multiple users, fingerprints, and configurable access windows. Reviewers emphasized that it’s easy to add or adjust access in the app.

Product 2: Yale August Smart Lock
4.4

User access management is robust, supporting multiple users (and often multiple homes/locks), with options to tailor alerts and track who used the lock and when.

Value and Price
Product 1: eufy Video Smart Lock S330
4.0

Value is framed as strongest when the price is closer to the low-to-mid $300s, since it combines multiple devices and includes the chime/bridge. At full price near $400, reviewers still call it feature-rich, but expectations rise for perfect reliability and broad ecosystem support.

Product 2: Yale August Smart Lock
3.6

Pricing is often called high but competitive for built-in Wi-Fi smart locks; many justify it for the retrofit convenience, while critics point to CR123 upkeep and occasional reliability hiccups as value detractors.

Voice control
Product 1: eufy Video Smart Lock S330
4.1

Voice control works through Alexa and Google Assistant in supported setups, including lock/unlock commands and, in at least one review, routines tied to doorbell events.

Product 2: Yale August Smart Lock
3.5

Voice control works with major assistants and typically requires a PIN/password for unlocking; several reviews report good results, while others mention occasional failures, slowness, or discomfort with speaking a password aloud.

Weather resistance
Product 1: eufy Video Smart Lock S330
4.5

Weather resistance is presented as strong on paper (including an IP65 rating in one review), and no reviewer reported weather-related failures in the provided transcripts.

Product 2: Yale August Smart Lock
No score yet
Wi-Fi
Product 1: eufy Video Smart Lock S330
3.9

Wi-Fi is tied to the required bridge and is noted as 2.4GHz in at least one expert review. In general, connectivity is described as stable, with one review calling out distance guidance between lock, chime/bridge, and router.

Product 2: Yale August Smart Lock
4.1

Built-in Wi-Fi is repeatedly highlighted as the key upgrade for true remote control without an add-on bridge, but it can increase battery drain and, in one account, made setup more finicky with certain Wi-Fi environments.