August Wi-Fi Smart Lock review

The August Wi-Fi Smart Lock is the easiest way to make an existing door smart. It replaces only the thumbturn on the inside of a single-cylinder deadbolt, so the outside of the door and your current keys stay as they are, which August describes as renter friendly. Wi-Fi is built in and works on 2.4GHz or 5GHz networks, so there is no bridge to plug in. The app handles remote locking, guest keys and an activity feed; Auto-Lock secures the door when it closes or after a set time of up to 30 minutes, and geofenced auto-unlocking opens it as you arrive. The included DoorSense sensor tells you whether the door is shut and locked, and the lock works with Alexa, Google Assistant and Siri. The weakness is entry from outside: without a keypad bundle you rely on your phone, watch or key. We compared documented features and published prices.

Who it is for

Renters and anyone who wants to keep their current deadbolt, exterior hardware and keys.

Price

$99.99 on the August US store during an early Black Friday sale (list $199.99).

lock/unlock with your smartphone or Apple Watch and the August App $99.99 $199.99
Quoted from the vendor pricing page on November 10, 2026.

Key features

• Attaches to the inside of an existing single-cylinder deadbolt, so original keys keep working
• Built-in Wi-Fi with no separate bridge, on 2.4GHz or 5GHz networks
• Auto-Lock after the door closes or after up to 30 minutes, and geofenced automatic unlocking
• DoorSense sensor reports whether the door is closed and locked
• Works with Alexa, Google Assistant and Siri; optional Yale Keypad or Keypad Touch for codes and fingerprints

Strengths and weaknesses

• Strength: Outside of the door does not change, which suits renters
• Strength: Small 72mm by 46mm body
• Strength: $99.99 when checked, half its list price
• Weakness: No keypad or fingerprint reader unless you buy a keypad bundle
• Weakness: Needs a single-cylinder deadbolt to mount on
• Weakness: Sale price may not last past the holiday promotion

Key facts

• Price: $99.99 when checked (list $199.99)
• Install type: Retrofit on existing deadbolt
• Connectivity: Built-in Wi-Fi, 2.4GHz or 5GHz
• Power: 2 CR123 batteries included
• Size: 72mm diameter, 46mm deep

Where it ranks

August Wi-Fi Smart Lock is No. 2 in our Best Smart Locks verdict.