In app purchases using unity free version

Hi I am using a unity free version with the free iOS and android license. is it possible for me to add in-app purchases where when the player makes a purchase, there are a few files which are downloaded onto their device. basically the player will be able to purchase new maps, which are XML files that will be downloaded on the device. is this possible using the free version or do i have to have a pro license?

When you make an in app purchase, your client app does not download anything from the Play/App Store, it only gets a receipt validating the purchase, with the purchased item id. What you want to do is possible, but you have to implement the desired behaviour yourself (ie if player purchased item_X then download map_X.xml) and store the XML files on your server.