I am working on sending notification to iOS devices. The problem is that I need to know if the notification went through. So as soon as the notification has been received (or few minutes after) the server knows that the message sent has been received (I want to be able to know how many messages has been received) For example, if a phone is off or with no internet connection, I want to be able to know that the notification (so the messages) has not been received. If I know that, I would send it back to the phone every 15 minutes.
Thank you very much for your help!!!