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I am glad with the prompt responses i am gettig here 
i have two more queries as follows -
1) Suppose i am selling my app on the app world for a certain subscription period initially. Also i have my own web site for the product. Now can the user renew the app through my own web site without causing any side-effects on the app world ? can this be synchronised ? Can multiple sites associate with the same app ?
Same about the updates of the application. Can a user update the app from my own web site after purchasing the app from app world.
2) exact the opposite case...If a user gets the application from my own site / CD-pack so can he later get updates or renew it from app world?
