$150; www.kwikset.com
The Kevo Convert smart lock conversion kit that transforms your existing deadbolt into a smart lock. With the Kevo App, you can enter your home with the convenience of keyless entry. Kevo Convert is easy to install, program and use, and operates on 4 AA batteries. Kevo now works with Alexa voice commands (requires Kevo Plus hub, sold separately). You can lock/unlock (PIN required) and check lock status.