Smart thermostat
Smart thermostats are similar to programmable thermostats in the sense that they have a scheduling feature that allows users to set different temperatures for different times of the day. In addition to this feature, smart thermostats implement other technologies to reduce the amount of human error involved with using programmable thermostats. Smart thermostats incorporate the use of sensors that determine whether or not the home is occupied and can suspend heating or cooling until the occupant returns. Additionally, smart thermostats utilize Wi-Fi connectivity to give the user access to the thermostat at all times. These additional technologies have proven to make smart thermostats successful in saving users energy and money.
Wireless light switch
There are more and more light switches can be controlled by smartphone. Usually user can control the light using mobile app. But for some products, extra corresponding hub is needed to connect those smart switches. 
In order to avoid the hub, wireless light switch and luminaire needs to share the same protocol, e.g. Bluetooth mesh Lighting model or Zigbee LightLink.