The August Wi-Fi Smart Lock (4th Generation) offers a remarkably easy installation process and reliable smart home integration, making it a solid choice for automating door security. However, its utility is limited by the lack of 5GHz Wi-Fi support and the absence of a built-in keypad, which can be problematic if a user is locked out without their phone. While the auto-lock features work well, the device's high standard retail price and bulky design may deter some buyers unless purchased on sale.
Full review
Renter-Friendly Retrofit Design
The defining characteristic of the August Wi-Fi Smart Lock (4th Generation) is its retrofit architecture, which allows it to mount directly over an existing deadbolt rather than replacing it. True Advisor highlights this as a 'genius solution' for renters and homeowners who wish to avoid the hassle of drilling new holes or discarding original keys. The exterior of the door remains completely unchanged, meaning landlords or neighbors will not notice the upgrade, a feature Shane Whatley from SmartHomeExplorer identifies as a primary benefit for apartment dwellers. This design preserves the traditional keyway on the outside, ensuring that physical keys remain a viable backup method even if the smart lock fails or loses power.
Installation is widely praised for its simplicity, requiring only a screwdriver and approximately ten to fifteen minutes to complete. Android Police reviewer David Murphy noted that the process involves removing the interior thumbturn, attaching a mounting plate, and securing the circular lock body with included adapters. The kit includes four different mount adapters to accommodate various deadbolt styles, though Rated Gadgets cautions that compatibility is not universal and some specific deadbolt models may not fit. The inclusion of the DoorSense sensor, which sticks to the door frame, adds a layer of precision by distinguishing between a locked door and an open door, a detail that standard locks often miss.
Built-In Wi-Fi and Connectivity
Unlike previous generations that required a separate Wi-Fi bridge, the 4th Generation model features built-in Wi-Fi connectivity, eliminating the need for an additional hub. SmartHomeExplorer’s consensus analysis emphasizes this as a major advantage, noting that it simplifies setup and reduces clutter. The lock connects directly to a 2.4 GHz Wi-Fi network, enabling remote access from anywhere in the world. Rated Gadgets points out that this direct connection is essential for features like voice control and remote locking, but it also means the device is dependent on a stable home network. Users must ensure their router supports 2.4 GHz, as the lock does not support 5 GHz bands, a limitation noted by Android Police.
The lock integrates seamlessly with major smart home ecosystems, including Apple HomeKit, Google Assistant, and Amazon Alexa. True Advisor describes the app experience as 'magic' when functioning correctly, allowing users to lock and unlock the door with a single tap. However, the reliance on Wi-Fi introduces potential latency issues. If the home network is congested or the signal is weak at the door, remote commands may experience delays. Android Police observed that while the app is generally no-fuss, its quality can vary depending on the update cycle, and some users have reported occasional glitches in the interface. The built-in Wi-Fi also impacts battery life, a trade-off discussed in later sections.
Auto-Lock and Auto-Unlock Performance
The Auto-Unlock feature, which uses geofencing to detect when a user approaches the door, is one of the most touted conveniences of the August lock. True Advisor describes this hands-free entry as 'pure magic' when it works perfectly, eliminating the need to fumble for a phone or key. However, the performance of this feature is highly dependent on the user’s smartphone settings and GPS signal strength. Android Police reviewer David Murphy noted that the feature can be finicky, requiring tweaking in the app to dial in the correct radius for unlocking. Some users report that the lock may not unlock if the phone’s location services are restricted or if the GPS signal is weak due to building materials or weather conditions.
The Auto-Lock feature provides peace of mind by automatically securing the door after a set period or when the DoorSense sensor detects the door is closed. Rated Gadgets highlights that the lock stores a history of lock and unlock events, sending notifications to the user’s phone. This is particularly useful for monitoring family members or service providers. However, the reliability of these features can be inconsistent. Some Reddit users have reported instances where the Auto-Unlock failed to trigger, leaving them standing at their door with groceries in hand. The lock’s ability to maintain a consistent connection with the user’s phone is critical for these features to function as advertised.
Battery Life and Power Management
Battery life is the most significant drawback of the August Wi-Fi Smart Lock (4th Generation). SmartHomeExplorer’s expert consensus notes that the CR123 lithium batteries typically last only three to four months when Wi-Fi is active. This is a stark contrast to Bluetooth-only locks, which can often last six to twelve months. The constant Wi-Fi connection drains power rapidly, requiring frequent battery changes. True Advisor mentions that the app provides warnings when battery levels are low, but the short lifespan is a recurring complaint among users. Android Police also points out that the lock does not support USB-C charging, meaning users must purchase and install new batteries every few months.
The power source consists of two 3V CR123 lithium batteries, which are more expensive and less common than standard AA batteries. Rated Gadgets notes that while the lock has a manual override for emergencies, the frequent need to replace batteries can be inconvenient. Some users have reported that the battery life can vary depending on the frequency of use and the strength of the Wi-Fi signal. In areas with poor Wi-Fi reception, the lock may work harder to maintain a connection, further reducing battery life. This is a critical consideration for users who prioritize low-maintenance devices.
Build Quality and Interior Aesthetics
The 4th Generation August lock is significantly smaller and sleeker than its predecessors, featuring a metal finish that many reviewers find aesthetically pleasing. True Advisor describes the design as 'brilliant' and 'incredibly easy' to integrate into a modern home. However, the interior mechanism remains bulky compared to some competitors. SmartHomeExplorer’s consensus highlights the 'bulky interior mechanism' as a common criticism. Android Police reviewer David Murphy noted that the lock is 'chonky,' even with its reduced size, and may not fit well in spaces with limited clearance behind the door. The circular design is distinctive but may not appeal to all users, particularly those who prefer a more traditional rectangular shape.
The build quality is generally robust, with a powder-coated finish that resists scratches and wear. Rated Gadgets praises the 'sturdy build' of the lock, noting that it feels durable and well-constructed. However, the interior components are exposed, which may be a concern for users with young children or pets who might tamper with the device. The lock’s weight of 1.54 pounds is manageable, but the bulkiness can be an issue in tight spaces. Users should measure their door’s interior clearance before purchasing to ensure the lock will fit comfortably.
Smart Home Integration and Guest Access
The August app allows users to generate virtual keys and share them with family members, friends, or service providers. True Advisor highlights the ability to grant temporary access, such as for a dog walker or a friend visiting for a day. Users can set specific time windows for access, ensuring that guests can only enter during designated periods. The app also sends notifications when a virtual key is used, providing a log of who entered the home and when. This feature is particularly useful for Airbnb hosts or sublet hosts, as noted by SmartHomeExplorer’s Shane Whatley. The ability to revoke access remotely adds an extra layer of security and convenience.
Voice control integration with Alexa, Google Assistant, and Siri allows users to lock and unlock the door using voice commands. Rated Gadgets notes that this feature is convenient for checking if the door is locked before going to bed or unlocking the door for guests. However, the reliability of voice commands can depend on the responsiveness of the smart speaker and the stability of the Wi-Fi connection. Some users have reported delays in voice commands, particularly if the smart speaker is located far from the lock. The integration is seamless for most users, but occasional glitches can occur.
Where It Falls Short
Despite its many strengths, the August Wi-Fi Smart Lock (4th Generation) has several notable weaknesses. The most significant is the short battery life, which requires frequent replacement of CR123 batteries. SmartHomeExplorer’s consensus score reflects this concern, with a lower rating for future-proofing due to the reliance on disposable batteries. Android Police reviewer David Murphy noted that the lock does not support 5 GHz Wi-Fi, which can be a limitation in homes with dual-band routers. Additionally, the app’s performance can be inconsistent, with some users reporting bugs and glitches that require troubleshooting. The lack of a built-in keypad means that users must rely on their phones or physical keys for entry, which can be inconvenient if the phone is left inside.
Another concern is the compatibility with existing deadbolts. Rated Gadgets warns that the lock only works with a few specific deadbolt models, and users must verify compatibility before purchasing. The installation process, while generally simple, can be challenging for users with non-standard door hardware. The interior bulkiness of the lock may also be an issue for users with limited clearance behind the door. Finally, the price point of $200 is considered high by some reviewers, particularly when compared to cheaper alternatives that offer similar features. Android Police suggests that the lock is only a good value when on sale, around $150.
Who It Is Best For
The August Wi-Fi Smart Lock (4th Generation) is best suited for renters and homeowners who want a non-destructive smart lock upgrade. SmartHomeExplorer’s Shane Whatley identifies it as the 'easiest recommendation for renters who want remote access,' thanks to its built-in Wi-Fi and compatibility with major smart home ecosystems. It is also ideal for Airbnb hosts and sublet hosts who need to manage guest access remotely. The ability to generate and revoke virtual keys makes it a powerful tool for property managers. Users who prioritize convenience and ease of installation will find this lock to be a strong fit. However, those who are concerned about battery life or prefer a more traditional design may want to look elsewhere.
Homeowners with existing deadbolts that are compatible with the August lock will also benefit from its retrofit design. The lock’s integration with Apple HomeKit, Google Assistant, and Amazon Alexa makes it a versatile choice for smart home enthusiasts. Users who value remote access and voice control will appreciate the built-in Wi-Fi connectivity. However, users who require a built-in keypad or prefer a lock with longer battery life should consider alternatives like the Yale Assure Lock SL or the Ultraloq U-Bolt Pro. The August lock is a premium product that offers convenience and ease of use, but it comes with trade-offs in terms of battery life and price.
Strengths
- +Super-simple setup that can be completed in minutes using a screwdriver
- +Seamless integration with Alexa, Google Assistant, and HomeKit
- +Reliable Auto-Lock and Auto-Unlock features triggered by phone proximity
- +Allows assigning time-based access permissions to guests via the app
Watch-outs
- −Does not support 5GHz Wi-Fi connectivity
- −Lacks an alternate unlock method if both keys and phone are left inside
- −Physical unit is described as bulky or 'chonky' despite size reductions
How it compares
While the August Wi-Fi Smart Lock (4th Generation) offers a simpler setup than the Schlage Encode Plus and a more compact footprint than the bulky Ultraloq U-Bolt Pro, it falls short by lacking a built-in keypad, a feature the Yale Assure Lock 2 and Ultraloq provide for keyless entry without a phone. Its reliance on 2.4GHz Wi-Fi mirrors the Ultraloq's limitation, but unlike the Yale, it does not support the newer Thread protocol for future-proofing.
Who this is for
At a glance: Apple HomeKit users prioritizing easy installation over keypad access.
Why you’d buy the August Wi-Fi Smart Lock (4th Generation)
- Super-simple setup that can be completed in minutes using a screwdriver.
- Seamless integration with Alexa, Google Assistant, and HomeKit.
- Reliable Auto-Lock and Auto-Unlock features triggered by phone proximity.
Why you’d skip it
- Does not support 5GHz Wi-Fi connectivity.
- Lacks an alternate unlock method if both keys and phone are left inside.
- Physical unit is described as bulky or 'chonky' despite size reductions.
Rating sources
Our 4.2 score is the average of these published ratings. More about methodology.
