Product Price Connectivity Bluetooth Range (m) WiFi Compatibility Battery Life (years) Lock Operation Methods Smartphone App Availability Voice Assistant Compatibility
August August Wi-Fi Smart Lock with Keypad Touch
US
£184.84 Bluetooth, Wi-Fi 802.11 b/g/n 2.4GHz and 5GHz 0.25 Physical key, smartphone app, keypad code, fingerprint, voice control Amazon Alexa, Google Assistant, Apple HomeKit, Siri

The August Wi-Fi Smart Lock with Keypad Touch provides built-in Wi-Fi, remote app control, fingerprint access, keypad codes, auto-lock and auto-unlock. It suits homeowners and renters who want keyless entry while keeping their existing single-cylinder deadbolt and keys.

★ Ideal for

It is not ideal for the quietest smart-lock requirement because its built-in Wi-Fi provides convenient remote control but the lock battery lasts only about 0.25 years, which indicates relatively high power use.

Schlage Encode Plus Smart WiFi Deadbolt
US
£210.73 WiFi and Bluetooth 2.4GHz WiFi 0.5 Schlage Home app, keypad access codes, Apple Home keys, physical key, touchscreen one-touch locking Amazon Alexa and Google Assistant

The Schlage Encode Plus Smart WiFi Deadbolt offers built-in WiFi, Bluetooth, Apple Home Key support, customizable access codes, remote control, and a physical backup key. It suits households wanting flexible keyless entry and smart-home integration without an additional hub.

★ Ideal for

It suits the search for the quietest smart lock because its app, Apple Home Key, keypad, and physical-key options allow quiet entry without loud voice commands or repeated motor operation, while its built-in WiFi and Bluetooth provide convenient control.

August August Smart Lock + Connect
US
£147.87 Bluetooth and WiFi via Connect WiFi Bridge 802.11 b/g/n 2.4GHz Existing key, smartphone, Apple Watch, August app, auto-lock, auto-unlock, voice control Amazon Alexa and Google Assistant

The August Smart Lock + Connect replaces the interior portion of an existing single-cylinder deadbolt while allowing existing keys to continue working. It supports smartphone and Apple Watch access, remote control through the included Connect WiFi Bridge, auto-lock and auto-unlock, and smart-home voice control, making it suitable for renters and homeowners who want convenient access without replacing their exterior lock.

★ Ideal for

It is not specifically suited to finding the quietest smart lock because available product information does not provide a quietness rating, and user reports describe the lock as somewhat noisy during operation.