Currently, if you have a smart door lock, you typically have to tap a button on your iPhone or Apple Watch to unlock it, or physically tap your device against the lock for NFC implementations.

Door Lock Ratings Protect your home and family with the best door lock or smart lock. Some door locks offer extra security with deadbolt and spring-bolt reinforcement technology.

Today’s door locks can be separated into three categories—conventional, nonconnected deadbolts; smart locks; and retrofit smart locks. Here’s what you need to know about them. These models ...