The Friday Labs Smart Lock is exactly what a smart home device should be: simple, small, and elegantly executed. There's nothing overtly complicated here, just an ergonomic, sculptural knob to locking the deadbolt and with the app all you need to do is approach your door and Friday automatically unlocks your door. You can also share keys with friends and family and you can even use Siri to open and lock your doors anywhere in the world with just a voice command. 

$249, fridaylabs.net