Sorry, I missed the first tag.
You may be able to integrate via homebridge. I you set it up with a smartthings and the other one you mentioned above. I recently posted detailed instructions here:
Here is a description of how to add a 2nd plugin in the config.json file:
You can then set up a virtual switch in Smartthings that is seen in HOmebridge and write rules in Apple Home that let you control your AC.
This is all not 100% straight forwardbut may be doable with some persistente 
Good luck!