Go to www.hooktheory.com

Off line use of Hookpad and books

Do I have to be online to use hookpad? I like the look of it, but need to use on an Apple OSX machine that is not networked (it has Arturia V collection). I would like to use it with my keyboards.
I looked everywhere for OS compatibility and am beginning to suspect that you are just selling access to your web server. Is that right?
Thanks, KDF.

I assume this is not at all possible because all they are selling is access to their website.