Smart locks are like personal assistants for your front door. They make sure only you and your friends can get in, and that no one is breaking in. Smart locks are the perfect solution when you want to give house guests or a babysitter access to your home at certain times but not others. The best smart lock can open any type of door with ease and keep intruders out. These devices also make it easier to check if someone has left the door unlocked. There are several types of smart locks on the market, so choosing the right one can be overwhelming. However, all of them have a few features in common: They connect to your Wi-Fi, they have sensors that trigger lock actions based on user input, and many of them install right over existing hardware (with little setup required). Read on to learn more about the different smart lock options available today.