ios - Non renewable in app purchases -

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now i'm working non renewable in-app purchases. have several questions guys.

user1 buy subscription 1 month, example. save expiration date of subscription in backend. ok, after 1 month user1 wants re-buy subscription. apple say: "user1, bought before, lets make restore" , extends subscription expiration date.

  1. how can solve problem?
  2. how can control expiration date of subscription?





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