Look at (play) the "free" apps in this category:
https://play.google.com/store/apps/collection/topgrossing

Look at how they manage in-app purchases.

On Tuesday, October 9, 2012 1:43:19 PM UTC+1, Andrew Cesario wrote:
>
> I am designing my first game for android and I would like to give away the 
> base game which would be downloaded for free. This is a single player rpg, 
> designed for use without internet access.  If people like it they can then 
> buy other maps...like dungeons... or different weapons, scrolls etc.. 
>  Different users could purchase the add-on items that they want, based on 
> their choices in the game.  These would cost real money to buy.
>
> How can I do this? 
>
> My thoughts are as follows:
> 1) UNLOCK approach.
> Initial download includes the entire software package. Users buy 
> 'licences' directly (like an in app purchase).  When they enter their lic. 
> code, it unlocks the items.  This seems to have a greater potential for 
> hacking.
>
> 2) MULTIPLE APP approach.
> Multiple apps for sale via google play. Use the free app to launch the 
> purchased app if it exists on the device.
>
> Any other ides or advice would be appreciated.  Any examples out there??
>
> -ac
>
>
>
>
>

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