I got confused about some issues:

1: The one month duration of auto-renewable subscriptions is 30 days or does it depend on a natural month?

Because I can only test in sandbox mode，so the duration is just several minutes... Maybe Apple just simply calculates it like this: 2013\01\15 -> 2013\02\15 -> 2013\03\15. If so,the second issue comes up

2: For example: I buy a monthly auto-renewable subscriptions at 2013\03\31 ,because 2013\04 only has 30 days, then what is the expires_date of my subscriptions? 2013\04\30 or 2013\05\01 or other date ?

iphone objective-c
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