August Third Generation Smart Lock | $99 | Amazon
August’s third generation Smart Lock lets you lock and unlock your door from using your phone, and you can get the silver model for just $99 today, the same price we saw on Black Friday,
Assuming you have your phone with you whenever you leave the house, an August Smart Lock-installed door will auto lock behind you and unlock as you approach. It’s especially useful because you don’t have to necessarily be home to grant or restrict access to people like dog walkers, maintenance workers, or other people who need to come into your house; just send them a guest key with the August app. And since it integrates with your existing deadbolt, you can continue using a physical key as well, if your phone ever dies.
Unlike previous August locks, this one doesn’t have Wi-Fi built in—it uses Bluetooth to talk to your phone—but you can add a Wi-Fi hub to your router to control it over the internet from anywhere. You can send guest keys without the bridge, but you can’t use Alexa or remotely lock or unlock the door.