Here is a smart lock that lets you lock or unlock your door using your smartphone. It is compatible with iPhone and Android 4.3+ devices. The OKIDOKEYS Bluetooth Smart Lock lets you create, share, and delete keys for family and friend members. You can create time-shifts for each user. You get 6 opening rules to unlock your door more conveniently. OKIDOKEYS sends you notifications when your door is unlocked.
OKIDOKEYS is easy to install and does not require any new wiring. You get 3 colors to choose from: Satin Chrome, Satin Brass, & Antique Brass. Not cheap, but it does make your home smarter.