Smart deadbolts get more sophisticated all the time. The ARRAY WiFi Deadbolt not only lets you unlock your door from anywhere in the world but also works with Amazon Echo devices. You can use it with iOS and Android devices. The lock has a rechargeable battery and a built-in solar panel.
ARRAY comes with geofencing technology, so when you are close enough, you get a notification whether you want your door unlocked. Users will be able to see an activity log to know who has come and gone.[where to find it]