https://www.cnet.com/news/these-smart-plugs-are-the-secret-to-a-seamless-smart-home/

Smart plugs with power monitoring, away modes and extra charging ports expand the capabilities of your smart home even further, all at a relatively low cost. 

The majority of smart plugs work with a 2.4GHz Wi-Fi connection and don't need a hub. That makes them easy to install and quick to connect. Smart plugs typically come with a companion app where you'll create an account and set preferences, schedules and names for the devices you're plugging into the outlet.