Hi,

I have a lite version of a game, rather than use inapp purchase can I link to the paid app in the app store, when the user clicks a button?
is it simple as using

system.openURL( "http://itunes.apple.com/us/app/crimson-kingdom-lite/id489135952?mt=8")

or is there more to it?

Yes you can;

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local function openIt()
        system.openURL("http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=489135952&mt=8")
end