Caching plugins operate independently of WPtouch & WPtouch Pro so in that regard, they are all compatible. They do, however, require setup to prevent them from blocking the mobile theme with content stored in the desktop theme (this is a very common occurrence). Once they are set up, they should reliably allow the desktop and mobile themes to display on the correct browsers.
Infinity Cache is available with the Agency/Multisite and Enterprise licenses only.
