Sadly, the Official IAP is only for one time purchase items:
For IntelXDK Crosswalk Export
You can use Cordova IAP from cranberrygame to make consumable items.
But it is a paid product :
Scirra Store: https://www.scirra.com/store/construct2 ... ugins-1662
Also, how can I display the product price converted in native currency format of the user/player?
It is already automated by google play. You just need the plugin for C2, Cordova IAP plugin, I mean.
For Cocoon.IO Export
Tutorial: https://www.scirra.com/tutorials/5013/c ... out-paying
A small tip:
The stable one for me & easier to manage is the IntelXDK export with Cordova IAP plugin. That is only my opinion. I've tried both and I find
IntelXDK to much more stable. But it is paid though.