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Published: 9 June 2025
Also featured in: Top 10 Smart Door Locks for UK Homes in 2025
Overview
The August Wi-Fi Smart Lock (AUG-SL05-M01-G01) is a compact, full-featured smart lock that fits discreetly inside your existing deadbolt setup. With built-in Wi-Fi, voice assistant compatibility, and remote access, it represents a smart upgrade for homeowners who want more control and convenience without a full door replacement. In this review, we cover how it performs, ease of use, connectivity, and how it compares to other leading smart locks in 2025.
Installation Process
The August Smart Lock installs over your existing deadbolt on the inside of the door, preserving your original keys and exterior hardware. No drilling or complicated rework is needed—just a screwdriver and about 10–15 minutes.
The August app guides you step-by-step with video instructions. Once mounted, the lock calibrates automatically and connects to Wi-Fi via your home network. The compact design (45% smaller than previous models) makes for a clean, subtle fit on almost any door.
Daily Use and Smart Features
The lock automatically detects your phone and can unlock as you approach (Auto-Unlock), then lock behind you (Auto-Lock) once the door shuts. You can check and control the lock’s status remotely using the app—even when you’re away from home.
Voice commands via Alexa, Google Assistant, and Apple HomeKit are supported out of the box. You can lock, unlock, or check status with a simple phrase. There’s also a detailed activity log that tracks every access event in real-time.
Wi-Fi and Mobile App Integration
Unlike many competitors, the August Wi-Fi Smart Lock doesn’t require an external hub—Wi-Fi is built in. The app (iOS/Android) lets you create virtual keys with custom permissions and time windows, ideal for friends, family, cleaners, or Airbnb guests.
The app is user-friendly and stable. Notifications for lock/unlock events are near-instant, and guest access setup is intuitive and fast. You can manage unlimited users and view logs from anywhere with internet access.
Build Quality and Compatibility
The lock is made from durable anodized aluminum and available in matte black or silver. It feels premium, and its small size makes it less obtrusive than most smart locks. It’s compatible with most single-cylinder deadbolts, especially popular in the UK and US markets.
While it’s not weatherproof (being installed inside), it’s built to last and resistant to tampering. August also includes DoorSense™, a small sensor that checks if your door is properly closed before locking—an invaluable feature.
Battery Life and Notifications
The lock is powered by two CR123 batteries, which last around 3–6 months depending on usage and Wi-Fi signal quality. The app notifies you well in advance when replacement is needed. Batteries are included and easily replaced from the front of the unit.
Security and Data Protection
The August Smart Lock uses two-factor authentication, AES-128 encryption, and TLS to secure communication. All virtual keys can be revoked instantly, and biometric authentication (Face ID or fingerprint) is used to access the app on mobile devices.
It meets ANSI/BHMA Grade 2 standards for residential security and has passed penetration testing. August does not store access data in an insecure manner and provides detailed transparency in their privacy policy.
Pros
- Built-in Wi-Fi – no hub required
- Works with Alexa, Google, and Apple HomeKit
- Discreet design fits inside existing deadbolt
- Auto-lock and unlock with phone detection
- Excellent guest access features via app
Cons
- Shorter battery life due to Wi-Fi
- Not suitable for multipoint locks
- CR123 batteries are less common
How It Compares
Compared to the Yale Linus and Ultion Nuki, the August Smart Lock excels in ease of installation and built-in Wi-Fi, while others may require extra bridges. It’s a better choice for renters or those who want to keep their existing keys and external door aesthetics intact. The Ultion Nuki may offer more robust physical locking, but August wins on app experience and compatibility.
Final Verdict
The August Wi-Fi Smart Lock is a top-tier choice for homeowners who want smart security without compromising style or replacing their door hardware. It’s sleek, powerful, and packed with features, including native voice assistant support and robust app controls. While the battery life could be better, the convenience and peace of mind it provides make it one of the best smart locks available in the UK today.
★★★★☆ (4.5/5)