We work very hard to keep as many features of WPtouch available in the free repository version, and generally err on the side of limiting a lot less than might seem sensible.
Some features are restricted to Pro when they cause users to need support or are used in the process of providing support, others (such as advertising, which allows website owners to make money) are limited to the Pro version to thank those members of the WordPress community who choose to support the six years of work that has cumulatively gone into WPtouch.
We’re confident that the free version of WPtouch allows bloggers and website owners to provide their mobile visitors with an engaging experience.