Offering auto-renew subscriptions to multiple apps - ios

As is confirmed by Apple here it should be possible to add the same auto-renew iap to multiple apps. I have an iPhone and an iPad app in which I want to offer one auto-renew iap, which when purchased once will unlock both apps.
To handle the subscription across both apps, I've setup a server where the auto-renew receipt is uploaded to once it's been purchased by the user. Each time a user opens one of these apps, a connection is made to the server to check if there is an active subscription, if there is one the app is unlocked, if not the 'buy a subscription' screen should pop up.
Now the question I am facing is how do I identify each user on the server when he checks for an active subscription ? How do I know when a user has bought a subscription before in on of the other apps ?

I have an iPhone and an iPad app in which I want to offer one auto-renew iap, which when purchased once will unlock both apps
I assume the iPhone and iPad app is not an universal app. Meaning, they do not share the same bundle ID. If it is an universal app, the receipt containing renewable subscriptions will be delivered as part of the App Store download.
how do I identify each user on the server
Since you don't want to bother the user with signing up for yet another account, you can persist the most recent active subscription date in iCloud. NSUbiquitousKeyValueStore is perfect for this. From a quick network inspection, this is how Ulysses seems to be handling universal subscriptions (they seem to be using a combination of iCloud KVS and CloudKit to determine if a user has already purchased a subscription on their Mac or iOS app). However, it now becomes an issue of whether your users have iCloud accounts.

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What happens to iOS subscriptions when the server / backend account is deleted?

Let's assume we are Netflix. The user created an account on our webpage and then downloaded the iOS app. Within the app he started a payed subscription by purchasing an auto-renewable iOS subscription.
The subscription is added to the user account on our webpage. Thus the user can access the paid content not only within the iOS App but also on our webpage from his SmartTV, etc.
The user can mange his account not only from within the iOS app but also directly on our webpage.
The iOS Subscription is not linked to the iOS app but the users Apple ID account. Deleting just the iOS app does not has any effect on the subscription at all. At the end of the subscription period the subscription would sill be auto-renewed and our server. Our server does not need an installed iOS to recognize the renewal (e.g. using Status Update Notifications or by polling the /verifyReceipt endpoint). Thus the user could still continue to access the payed content even if he does not use/install the iOS App any more. Is this correct?
But what happens if the users decides to delete his user account on our webpage and forgets to cancel the iOS subscription?
In assume the subscription would simple do the same as before and would auto-renew at the end of each subscription period. Since the user account on our server has been deleted the server does not recognize the renewal any more and the user simply pays for nothing. Is this correct?
Or is there any way the server can notify Apple to cancel the subscription?
Question 1: The iOS Subscription is not linked to the iOS app but the users Apple ID account. Deleting just the iOS app does not has any effect on the subscription at all. At the end of the subscription period the subscription would sill be auto-renewed and our server. Our server does not need an installed iOS to recognize the renewal (e.g. using Status Update Notifications or by polling the /verifyReceipt endpoint). Thus the user could still continue to access the payed content even if he does not use/install the iOS App any more. Is this correct?
Ans: Yeah You are right. When you had send receipt to server first time, then receipt will be verify with apple by verifyReceipt, after that your server validate this receipt time to time.
Question 2: But what happens if the users decides to delete his user account on our webpage and forgets to cancel the iOS subscription?
Ans: If user has deleted his user account on webpage then user account will be auto-renew at the end of each subscription period. There is only the way to manage i.e. if a user request for refund after deleting the account, then you can check form server(for deleting his account) and refund his money.
Question 3: In assume the subscription would simple do the same as before and would auto-renew at the end of each subscription period. Since the user account on our server has been deleted the server does not recognise the renewal any more and the user simply pays for nothing. Is this correct?
Ans: No this is not correct. Subscription will only be managed by Apple , not your server. Only your server can hit the request for verify subscription status time to time nothing than else.
Question 4: Or is there any way the server can notify Apple to cancel the subscription?
Ans: No, there is no way. Because of apple security. Server has not any authority to do anything in users account(Apple account). That is the reason apple will never approve your app with auto renew if you will not clearly see the below information to user before his purchasing(Subscription). Please refer attached screenshot.
There is no automatic API for this flow it seems within IAP ecosystem.
Here is what you can do.
Upon (before / after, depending upon how you want it) account deletion from within iOS app, you are obligated to route the user to the following page to remove his / her subscriptions, by visiting the following page:
https://buy.itunes.apple.com/WebObjects/MZFinance.woa/wa/manageSubscriptions
Opening this URL launches iTunes or iTunes Store and displays the
Manage Subscription page.
If account deletion was initiated from web UI, you should show an instructional page for canceling subscriptions from all possible devices (iOS, Android, TV apps, Web). It is then user's responsibility to ensure he / she cancels it.
Since Apple is the marketplace, this is not different from you buying a grocery product from a supermarket. As it is mentioned on Apple docs pages, it is iOS user's responsibility to get in touch with Apple Customer Care for subscription cancellation.
As a service provider, you are obligated to demonstrate to the user how to do it.

while creating an ios app with in app purchase, i have a query

As we all know that once we purchased apple subscription plan from a device with Apple id the same will be resume on other device if have login with that same Apple id.
But here we need that every time the user will login on different device with the same Apple id or different Apple Id, we want's the to user purchase the subscription plan. e.g., If user has purchased 2 Subscriptions then he will be able to use app on two different devices So for that we created multiple subscription products.
Can someone help how we can create multiple products for same functionality So that Apple can approve it.
That would go against Apple's guidelines for allowing users to restore their in app purchases on any new or existing devices.
https://developer.apple.com/library/archive/documentation/NetworkingInternet/Conceptual/StoreKitGuide/Chapters/Restoring.html
Users restore transactions to maintain access to content they’ve
already purchased. For example, when they upgrade to a new phone, they
don’t lose all of the items they purchased on the old phone.

Notify App Server if user Toggles 'Off' an Auto Renewable In App Purchase

In Auto Renewable In App Purchase, how could the App's server be notified, if user toggle's off the Auto-Renew button in Settings?
Your App's server only receives info about the last payment from Apple's API.
If a user toggles Renew automatically to Off, it is not reflected in the API.
Hence, there is no means a developer can figure for sure when an auto-renewing subscription will end until it actually ends.
Also, there is no need for you to manually revoke the functionality before the period ends because the user has already paid for the subscription duration.
Only, case where you might need to revoke it manually would be when you need to sync the features across platforms (across web browser/mobile App/Desktop App with same account).
Cross-Platform Considerations
Product identifiers are associated with a single app. Apps that have
both an iOS and OS X version have separate products with separate
product identifiers on each platform. You could let users who have a
subscription in an iOS app access the content from an OS X app (or
vice versa), but implementing that functionality is your
responsibility. You would need some system for identifying users and
keeping track of what content they’ve subscribed to, similar to what
you would implement for an app that uses non-renewable subscriptions.
https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/StoreKitGuide/Chapters/Subscriptions.html

Is it possible to offer Apple's In App Purchases on an app that offers multiple user log-ins

We're designing an iPad app at the moment which offers in-app purchases for non-consumable items.
As the scope of the project has expanded, we want to allow the option to sign in to an account, and then sign out of that account and into another - similar to how one could on an app like the Facebook app.
My question is: is it possible to link Apple's in-app purchases to one of our system's user accounts, so that a User may sign in to a different device and access their purchases, but if another User signs in to my device, they cannot access my purchases (despite the device being signed in to my Apple ID)?
Any suggestions welcome
All completed in app purchases are tied to the Apple ID that was used at the time of the transaction. Since non-consumable in app purchases can only be purchased once, you can't use those. So, the only option would be to use consumable in app purchases and keep track of which system user account made the purchase. You need to store those purchase records on an external server somewhere though, since Apple will have no way of telling you which purchase went to which of your internal users. If you lose that purchase history your users will have to buy the item again, and probably not be very happy.

Made In app purchase Using with Device token or Apple ID

I am implementing In-App Purchase in my app and test around the existing apps to get some ideas. But I found a scenario which I am quite confused on it.
I have installed an iOS app and purchased the particular levels. Later I uninstall this app, sign out from existing iTunes store account and sign in again with another apple id, then reinstall that app again (same app). Here i can again i need to purchase the particular levels.But my doubt is In-App purchase method we can use based on the purchase Apple ID or Device token ?
If the user can purchased with Apple ID ,then the user can login with another device they no need to purchased again but one user can purchase app and user can login to another users Devices is the one problem..!why because another users no need to purchase.
And if we set the Device token, based on the in-app purchase user can only login that device only ,they can't login another devices with same Apple ID,here it is a problem.
I am quite confused on it... so is the purchased items tied on device if we use multiple apple ids on same device?
I understand that I can restore my purchased items on different devices using same apple id. But how about multiple apple id on multiple devices? If I have 2 apple id associated on an device, I use one of them purchased item, but later I use these 2 apple id login to another device, am I still need to pay again to download items I have purchased on previous device?
Please let me know if my questions are not clear... I hope someone can give some idea on sharing purchased items against different devices and apple ids.And which one use the in-app purchase.
Any suggestions and comments are welcome. Thanks a lot.
IAPs fall into two categories - consumable, and non-consumable.
Non-consumable purchases (purchase level 10-15 of a game, upgrade to pro, etc) are synced across devices by the system, and are restored by the system. They are tied to the Apple ID.
Consumable purchases (purchase 5 gold coins) are NOT synced or restored. Your application needs to remember that the purchase has been made, and store information about that so that a backup and restore correctly restores the user's state. If the user uninstalls and then reinstalls, they have lost any previous consumable purchases (but they will retain all non-consumable purchases, and your application can query for these). You can, of course, sync all information about consumable purchases to your own server, but you would then need to have the user create an account with you. This would allow you to sync consumables between devices.
The Device ID (which you can't get, anyway) has no relevance.
See https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/StoreKitGuide/Chapters/Products.html for more discussion.
If the IAPs are non-consumables (or autorenewables) they can be 'restored' by the user (i.e. the app would execute a restoreCompletedTransactions or refreshReceipt). I believe that the username/password log-in required to restoreCompletedTransactions (or refreshReceipt) must be the same username/password as the person who downloaded the app onto the device. Given that requirement, I still believe that a single 'purchaser' can share their single purchase of a non-consumable IAP on many devices.

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