A sample app consists of three epsodes. Epsode1 is free, Epsode2 and Epsode3 are to be paied. Once paied, the image files of Eposde2 or Epsode3 is downloaded from an Internet server iap_badger is well known library of Corona SDK. It supports apple, google and amazon Sample app please read more from this tutorial page http://kwiksher.com/daily/downloadable/ P.S. you need the latest Daily build of Corona SDK and the latest Kwik4.