google play - Prepare android application for future in app billing -


i want release android application moment free, in future might have in app products. understood, once app published cannot switch free billing. enough if add permission in manifest billing, or should implemented?

according old question on subject, (i need updated information: publishing free application android market, in-app billing in future), paid application not refer in app products, , in app billing can added later. still true?

it still same policy, mean "you cannot change free paid app" can't start charging people download of application later, since make conflict existing downloads. it's ok publish free , add billing inside app new update, when finish part of app.


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