According to the documentation in the Apple IAP https://docs.coronalabs.com/plugin/apple-iap/init.html the store.init() will call listener with the "init" event like Google IAP, but that event it is not included in the documentation for Apple IAP in event.name. Due to a recent post I posted in our forum I've noted that some developers understand that that event does not exist for Apple and due to that they implement a function who is called every frame in order to wait for the store to be initialized and then call the load of the products.
According to the documentation in the Apple IAP https://docs.coronalabs.com/plugin/apple-iap/init.html the store.init() will call listener with the "init" event like Google IAP, but that event it is not included in the documentation for Apple IAP in event.name. Due to a recent post I posted in our forum I've noted that some developers understand that that event does not exist for Apple and due to that they implement a function who is called every frame in order to wait for the store to be initialized and then call the load of the products.