Product Price Connectivity Bluetooth Range (m) Battery Life Smartphone Compatibility Locking Speed (s) Auto Unlock Voice Control Keypad
Kwikset Halo Touch 959CNT514FPRTWI
US
£108.96 Wi-Fi iPhone 6 or later models running iOS 12 or higher; All Android phones supporting Bluetooth 4.2 or higher and running Android OS 8.0 or higher

Halo Touch is a Wi-Fi-enabled smart deadbolt you can lock and unlock using your fingerprint or a key, and manage through the Kwikset app. It supports voice control via Amazon Alexa and Google Assistant, and it can be controlled remotely using your home Wi-Fi network. This suits people who want biometric entry with app/voice control without needing a smart home hub.

★ Ideal for

Not securely supported: this specific Halo Touch model lists keypad as No and provides no reliable, spec-found Auto Unlock or locking-speed value, so it is not possible to identify it as the most secure smart door lock based on the requested concrete specs.

Kwikset Halo Keypad Wi-Fi Enabled Smart Lock 938 WIFI KYPD 15
US
£123.83 Wi-Fi (no hub required) Kwikset app

This is a Wi-Fi-enabled smart deadbolt you can control remotely from anywhere using the Kwikset app, without a hub. It has a backlit keypad for keyless entry (including scheduled/temporary access codes) and supports voice control with Amazon Alexa or Google Home. It also supports auto-lock scheduling after entry or exit.

★ Ideal for

For 'the most secure smart door lock available,' this model offers keypad-based entry with configurable access codes and auto-lock scheduling, plus SmartKey technology and notifications for unusual activity (like invalid code attempts or tampering), which directly supports stronger access control than basic smart locks.

Yale Approach Lock with Wi-Fi + Keypad Touch B-YRR110-F-WF1-N-BSP
US
£135.91 Wi-Fi and Bluetooth 30 12 iOS and Android via Yale Access app or August app

This is an interior-only retrofit smart lock that keeps your existing deadbolt while adding fingerprint access via the Keypad Touch and remote control via Wi‑Fi. It supports Auto-Lock with DoorSense and Auto-Unlock as you approach, and lets you unlock/lock using the Yale Access app (or the August app). It also integrates with voice assistants including Alexa, Google Home, and Samsung SmartThings.

★ Ideal for

For the most secure option, it combines Wi‑Fi remote access with biometric fingerprint unlocking plus keypad touchscreen entry and voice/phone control through supported smart home platforms.