I am developing an apple apps using auto renewable iap subscription. The duration of the subscription is 1 month. For the testing I am using sandbox user. If the testing using the sandbox user, the period for one month will 5 minutes.
I've already setup the subscription url in itunes connect. After I purchase the subscription via my apps, my server got the notification from itunes. But after 5 minutes, my server should get the notification that the subscription is renew, but my server never got that notification from itunes.
How to get continous notification from itunes to my server?