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Smart locks offer around the same level of safety as conventional locks with keys. The best way to secure your door locks is to combine routine locking mechanisms with other home safety features, like lighting, motion sensors, security cameras, and window and door sensors. 

Smart locks have the upper hand when it comes to convenience—you won't have to worry about your key not turning in the lock or fumbling around in your bag for your keys—but beyond that, any door with deadbolts will offer a similar degree of security.

Whether or not keyless door locks are safe and trustworthy depends on the visibility of the programming code—and a trespasser’s determination. Even if you carefully guard entry and programming codes, those trying to break in may be able to crack open the lock’s faceplate with a screwdriver and change the codes. The same goes for manual models.

Some find smart locks the safest option because it’s harder to manipulate codes without access to your phone. But it’s possible to get hacked even then. Consider installing an extended security system, like door and window alarms or surveillance cameras, to enhance security. 

You might want to change a door lock entry code for a handful of reasons. The most common answers are extra security or a forgotten code. You may also find yourself in a position where you need to temporarily change the code to allow a guest to come and go freely but want to switch it back once things return to normal.

There are different types of deadbolts. The most common type is a single-cylinder deadbolt, which you may recognize on your front door. This type of lock has a keyhole on the outside and a thumb turn on the inside. A double-cylinder deadbolt has two locking mechanisms and requires a key to engage on the inside as well as the outside.