August

The $200 August is the most elegant of the five, and its appearance is brushed aluminum, which can be controlled by iOS, Android, and Web applications. You can give your door lock code to your specific family and friends, and you can customize it accurately. How long, how many days, or even hours, they will visit once to prevent accidental access. When a visitor uses the phone's numeric keypad to recognize it, the lock activates Bluetooth to identify it and then automatically unlocks it.

Lockitron

The $179 Lockitron is mounted on the rear door latch and can be unlocked with a single click. Through the application, you can authorize friends, family, and guests to enter. The lock has built-in WiFi, so you can receive push notifications wherever you are. If you are close by iPhone Bluetooth 4.0, the lock will be automatically recognized. It's not the prettiest smart door lock, but this smart door lock that looks a bit like plastic may be the easiest to set up.

Schlage

The price is $200-$300, from an established door lock manufacturer, the number buttons on the door lock allow you to access with a four-digit password, and you can use its Nexia Home Intelligence app on your mobile device. You can create 19 private passwords for different family and friends. Allow them to access only at specific times, then delete the password and create a new record. If you want to remotely control this lock, you will pay a $9 value-added fee each month.

Goji

This is the latest addition to the smart lock ranks. Like August, the appearance is like a round plate with a LED plate on the surface that will show relevant greetings when visitors enter or leave. The most interesting thing is that the built-in camera will take pictures of the person who activates the door lock. No matter how unpleasant the angle is, it will try to collect photos of these people. Like August, you can also give your door lock code to your specific family and friends, and you can customize it.

Kevo Lock

Kevo Lock is currently announcing that it has received a lot of money from the TV reality show, and of course the lock itself is impressive. This lock needs to be reinstalled and connected to your iPhone via Bluetooth. When you open the door, tap the green flash point on the screen to unlock it. Similarly, you can send a digital password to someone else by applying a custom password for the number of valid times and the period of validity.

Via wired

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