Transferring IAPs

[Game_Master]

Say I have two versions of an app: a free, ad-supported one (using ChartBoost or another service that we don't have an extension for), and a paid one with no ads. I also have an in-game currency (coins). As the user plays the game, they get more of this currency, and they can also purchase it using IAPs.

If the user wanted to upgrade to the paid version to get rid of ads, what would be the best way to get the user's amount of coins? If I was using an extension, I would simply using an IAP to get rid of ads, but because I don't have an extension to display ads, I cannot do that - the user has to download the paid version to get rid of ads.

[Game_Master]

Does anyone know how to do this?

[JoKa]

I'd say you'd have to store an identifier for each player and his amount of coins on your own server to transfer between different apps.

[DistantJ]

I'd just put them together as one app, have it so that disabling ads is an IAP as well, keep everything within the same app.

[JoKa]

I think he wants to add Chartboost, so he can't use this method because we can't enable/disable CB without an extension.

[Game_Master]

I'd say you'd have to store an identifier for each player and his amount of coins on your own server to transfer between different apps.

Thanks - that's what I figured. Where would be a good place to start with this? I don't know any PHP or MySQL, but I'm assuming this should be relatively basic to implement? Would there be any security measures I'd have to use to make sure people don't manipulate their coin totals?

DistantJ, thanks, but like JoKa said, it's not possible to do that without an extension, sadly.

[Olivier]

According to me a good start is Jeff's "Online Scores using PHP/mySQL" tutorial. It includes some obfuscation scheme for security. You should be able to adapt it to your needs. The tutorial can be found on CT's tutorial page in the "Advanced" tab:
http://www.clickteam.com/website/world/tutorials

[Game_Master]

Thanks, Oliver! I forgot about that tutorial.