August Wi-Fi Smart Lock (4th Gen)
The verdict
The install is the selling point: it fits over your existing deadbolt on the inside of the door — about ten minutes, no locksmith, and your outside key still works. Auto-unlock fires as your phone approaches, DoorSense confirms the door actually closed behind you, and Alexa, Google, and HomeKit all get voice control.
August Wi-Fi Smart Lock (4th Gen) — about $110–$180 on sale (list $229.99) · ≈4.3–4.5/5 from ~10k ratings — the deadbolt that retrofits over your existing lock, with auto-unlock as you arrive home.
For a blind homeowner, keyless entry plus a spoken confirmation the door is shut is a genuine independence upgrade.
The honest gaps: there is no built-in keypad — that's an $80 add-on — so guests and kids need the app or a key. Battery life is 3–6 months on the two CR123s, so calendar the swap. The August app's VoiceOver compatibility is unverified in our research — lean on the voice assistant for lock/unlock/status rather than the app. And the lock itself gives no tactile or audio status; DoorSense's confirmation comes through the phone.
Price discipline matters: this lock lives on sale between $110 and $180, and the $229.99 list is fiction. Never pay list. At the sale price with auto-unlock doing the daily work, the value case is strong; at list, wait.
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Last reviewed: October 2026.