On Mac, Corona (2017.3135) is installed into Applications/Corona folder by default. it used to be Corona SDK folder. ( It is not changed on Windows ) Kwik 3.6.4 Need Corona SDK public release 3135 or later FIX:store init Now use google IAP plugin in build.setting FIX:platformName is deprecated. Now using "platform" Kwik 4.0.5 Need Corona SDK public release 3135 or later FIX: IAP google with plugin FIX:platformName is deprecated. Now using "platform" Android In App Purchase. Adding notes about Opt url, and rollout alpha/beta release for testing with device http://kwiksher.com/doc/tools/IAP/IAP_android.html BookShelf.zip is updated http://kwiksher.com/doc/tutorials/kwik/bookshelf/bookshelf_overview.html