August WiFi Smart Lock (4th Gen)
A retrofit smart lock that installs over your existing deadbolt in minutes — you keep your physical keys and existing exterior hardware. Built-in WiFi eliminates the need for a separate bridge, providing remote access and smart home integration out of the box. Auto-lock secures the door behind you, and auto-unlock detects your phone approaching to unlock hands-free. The DoorSense sensor confirms whether your door is truly closed and locked. Works with Alexa, Google, and HomeKit for voice control and automation.
Read on Celmin Magazine →Pros
- + Retrofit design (keep your keys)
- + Built-in WiFi
- + Auto-lock/unlock
- + Works with all platforms
- + DoorSense sensor
Cons
- - Battery life varies
- - Bulky on inside
- - WiFi can be slow
Key Specs
- Dimensions
- 7.3 x 5.9 x 5.9 cm
- Weight
- 227g
- Lock Type
- Retrofit deadbolt
- Connectivity
- WiFi, Bluetooth
- Battery
- CR123A (6 months)
- Compatible
- Alexa, Google, HomeKit
Our Verdict
The best retrofit smart lock — you keep your existing keys and deadbolt while adding smart features. Built-in WiFi means no extra bridge needed.
Best For
Renters and homeowners who want smart lock features without replacing their existing deadbolt or giving up physical keys.
How It Compares
| Spec | August WiFi Smart Lock (4th Gen) | Ring Video Doorbell 4 |
|---|---|---|
| Price | C$315 | C$270 |
| Lock Type | Retrofit deadbolt | — |
| Connectivity | WiFi, Bluetooth | — |
| Battery | CR123A (6 months) | — |
| Compatible | Alexa, Google, HomeKit | — |
| Video | — | 1080p HD |
| FOV | — | 160 degrees |
| Night Vision | — | Color |
| Power | — | Battery or hardwired |