Enabling chat box on mobile websites
Currently, if you'd like to show the Olark chat box on the mobile version of your website, you'll need to enable the beta mobile interface.
Go to the Advanced configuration to enable it:
Give that a shot, and keep an eye out for even better mobile Olark in the future!
Still not seeing your website's chat box when testing from a mobile device? Make sure that "private browsing" is turned off in your device's settings. Olark only loads on devices that allow stored cookies.