Chess King Software

I've never bought a copy, but I seem to remember hearing that it uses the Stockfish engine exclusively. I don't think you can import any other engines.

I bought it last night and it uses Houdini 5 but not until you move up in level. It keeps it at a robot level for a while. I am not sure if you can force it higher, but so far I like it a lot. I also bought Deep Shredder.
Not sure if this should go into the Chess equipment forum, but I will try here... Admins feel free to move. I was googling "Chess for Mac" and it came up with a new piece of software I never heard of called Chess King. I have Deep Shredder, and Hiarcs for MAC but never heard of this one. Their site looks a little basic, but wondering if any of you have tried it? If so, thoughts?
Thank you all!