Nearly all standalone security cameras connect to your home's Wi Fi so you can see what's going on from your phone or tablet, and most have built in sensors that detect motion and sound and will send push and email notifications when those sensors are triggered. You can usually tweak the camera's motion sensitivity to prevent false alarms due to pet activity or passing cars if the camera is near a window, and you can create a schedule that turns the sensors on and off during certain hours of the day. A smart lock is typically part of a robust smart home security setup, but you don't have to invest in a full blown system to use one. If you're using a home automation hub to control things like lighting and thermostats, you can add a Z Wave or Zigbee smart lock to the system without much effort. Alternately, if you don't have a home automation hub, look for a Wi Fi or Bluetooth lock that comes with its own mobile app. Smart locks use standard pre drilled holes and are fairly easy to install.