Meet the Sesame: a smart door lock that replaces your keys with your phone. It fits on your lock quickly without you having to do a whole lot. Once you have installed Sesame, you will be able to lock/unlock your door using the Sesame app on your phone. You also get to share access with your guests. You get a notification when your door is opened or closed.
Sesame is designed to fit most deadbolts. It has a battery that lasts up to 500 days. You do have the option to connect Sesame to the Internet with a WiFi Access Point. Want to unlock your door using a custom knock? No problem. You can find this smart lock on Kickstarter.