I agree. I actually use trello more like a onenote replacement than anything else. An offline app would be really nice in a lot of ways. Unfortunately, there are still some places I go with my laptop that doesn't have wifi available.
Plus a standalone app would be nice too, having it as a separate application outside of my browser window, but I digress.
You start Chrome from the command line with that parameter. So, if `path_to_chrome` starts chrome from the command line, you would use something like `path_to_chrome --app=https://trello.com`. Without knowing your operating system, I can't be much more exact than that. I hope that points you in the right direction!
Plus a standalone app would be nice too, having it as a separate application outside of my browser window, but I digress.