in-app purchase, multiple auto-renewing subscriptions having different durations_问答_开发者

A question regarding in-app purchase auto-renewing subscriptions:

I'm unclear how to handle the case where a user purchases multiple subscriptions of differing durations. It seems that Apple will reco开发者_开发知识库gnize if the user has already purchased a given SKU (based on product-id) and prevent re-purchasing (my app gets a failed-transaction event in this case), but if I offer the same content using different product-ids having different durations, then the user can potentially purchase twice or more.

Even if I hide the additional purchase options once the user has subscribed once, they could potentially buy another subscription on an alternate device, and that purchase would/could ultimately be restored to the other device already having a subscription.

Am I supposed to track purchased subscriptions by transaction-ID and product-ID, and calculate an ultimate expiration date? That seems complicated.

Before I proceed, please see the comments on this linked post on why it may be a bad idea to use auto-renewing subscriptions.

Stop me if you've heard this before.
When you choose Auto-Renewable Subscriptions in iTunes Connect, you are given the opportunity to add multiple durations, with different Product ID's to one subscription Family. Apple won't allow a user to purchase multiple, overlapping subscription durations within one family. (If you're using multiple families in your app, please explain the reasoning, so I can give you guidance based on that).

In fact, Apple won't let the user stack different durations of a subscription within one family.

Here's an example.
I (as a user) download the hypothetical Acme app and subscribe with a 1-month subscription. If I do nothing, my subscription will automatically renew at the end of the period with another 1-month subscription. And so on.

But instead I go back in and purchase a 6-month subscription. Apple will tell me (with an alert) that my 6-month subscription will begin at the completion of my current 1-month subscription, and would I like to proceed. If I say yes, Apple will make note of it, but they won't charge me until my current 1-month is up.

Now if I go back in again and purchase a 1-year subscription, then again Apple would respond with an alert telling me that it will begin at the end of my current 1-month subscription. It won't get added to the upcoming 6-month subscription. It will replace it.

In Summary
So a user can only have one Current subscription and one Upcoming subscription (within a family. This is why you use a Family of product durations within a subscription. If you create multiple subscription families then they can exist simultaneously, and you loose that protection.

If, as a developer, you'd like to manually extend, shorten, cancel or stack subscriptions, you should be doing it with Non-Renewing Subscriptions. And if you read the link I posted at the top, you'll realize that Apple may force you to do that.

try using MKStoreKit 4, it has support for auto renewable subscriptions http://blog.mugunthkumar.com/coding/mkstorekit-4-0-supporting-auto-renewable-subscriptions/

Please consult Appstore Subscription page for latest information https://developer.apple.com/app-store/subscriptions/. The gist is to use group to define multiple subscription channels

Creating Subscriptions

Users can only buy one subscription within a subscription group at a time. If users would want the ability to buy more than one type of subscription — for example, to subscribe to more than one channel in a streaming app — you can put these in-app purchases in different subscription groups.

Upgrades, Downgrades, and Crossgrades

When a user upgrades to a subscription of any duration, or crossgrades to a subscription with the same duration, the service level change goes into effect immediately. When a user downgrades to a subscription of any duration, or crossgrades to a subscription with a different duration, the change goes into effect at the next renewal date.

Having a similar issue. Had an app approved with two subscription groups (for annual and monthly). They are auto renewing subscriptions. We have hundreds of users and they want us to change by deleting subscriptions groups and create a new one. Is it possible to create a new group and move existing products to that? Not sure what to do here and what happens next.