Matt, it works for me on both my iPhone 5 and my iPad. You should see a menu bar across the bottom where you can switch from pc mode to mobile and back. In mobile mode there is a “ladder” looking icon that brings up the mobile menu. I like pc mode on the iPad but mobile on the phone. See if that works for you.
Also, there are some mobile setup options in the web site itself. We may need to play with them to see what works best. The newest version of ClubExpress (just released this week) has a bunch of enhancements for mobile devices. Once we get it tweaked it should work well on smartphones.
You may need to scroll around on the screen to find the log in window on the small iPhone screen.