Microsoft Cortana
Across your work life and your personal life, Microsoft Cortana is your intelligent assistant. Cortana is built-in on Windows 10 PCs and she's available as a free app for iPhone and Android phones.
Commands
"Hey Cortana, turn on the kitchen lights"
"Hey Cortana, turn the lights on"
"Hey Cortana, dim the lights"
"Hey Cortana, change the lights to blue"