Here is another gadget that makes it easier to control your air conditioner from your smartphone. The Sensibo Sky allows you to turn on your AC through Google Home and Alexa enabled speakers with voice commands. It allows 7 day scheduling and is smart enough to turn off the A/C when nobody is in the room.
The 2nd generation Sensibo Sky is compatible with split, window, and central A/C systems. It comes with an open API with integration possible with SmartThings and other platforms.[where to find it]