One note on detecting whether the auto-renewing subscription is in the free trial period. The value of this field is either "true" or "false". This field can be present in all in-app purchase types, not just for auto-renewing subscription records and has no current meaning for non auto-renewing subscription records. Lets assume that the user does not cancel the free trial.
On the last day of the free trial, the iTunes store will bill the user for the first month of the auto-renewing subscription I may be off as to the exact time that the user account is billed. The iTunes store will set up an incompleteTransaction on the store for the user and applicationID. At some point, the user will launch the application and assuming that the application has called addTransactionObserver in the startup process, and there is an active network connection, the application immediately detects the incomplete transaction.
The applicationReceipt is validated. This is how the app will detect that the auto-renewing subscription is current. So what happens when a user cancels a subscription. There are 2 cases to study here. There is the case that the user decides to let the current subscription expire.
In this case, on the next auto-renew date, iTunes will not post an incompleteTransaction to the user account. If the application knows that the subscription was active, it can alert the user that the receipt does not show that the subscription is active and can ask the user whether to refresh the receipt using the SKReceiptRefreshRequest. When this happens, the date of the refund is noted. However, in this latter case where there is only the original applicationReceipt, see the following.
Note that the applicationReceipt is only updated when the receipt is refreshed, when the updatedTransactions delegate method is called for a successful or restored transaction or when the application is installed from the iTunes store in the case that another copy of the app is to a second device.
The above description describes the process envisioned by StoreKit engineering for how an application works with the iTunes Store server to detect auto-renewing subscription renewal. It turns out that there is a second method - which is not so clearly documented; it is hinted at via comments in the Receipt Validation Programming Guide.
The alternate means for receipt validation allows for a server based validation process independent of the app. The app must be used to make the initial purchase of the auto-renewing subscription item so that a copy of the applicationReceipt can be passed to the server. The server passes the base64 encoded applicationReceipt to the iTunes Store verifyReceipt server. Within this field there is. You can use this value to display an alternative subscription product in your app, for example, a lower level subscription plan that the customer can downgrade to from their current plan.
The base encoded transaction receipt for the most recent renewal. The JSON representation of the receipt for the most recent renewal. By providing any transaction receipt for the subscription and checking these values, you can get information about the currently-active subscription period. The JSON response can be parsed and will provide the latest information about the auto-renewing subscription item. The result can contain multiple items, and for this reason.
As such the status result does not apply. This is because there can be multiple items in the response and the expired status may not apply to all items. When the status of 0 is returned, the receipt was successfully validated and the app or server process must process the returned results individually. If a user switches to another auto-renewing subscription item in the group, then you validate the same original receipt, the change to the different auto-renewing subscription group item is recorded.
One additional note, a user has the option to terminate an auto-renewing subscription item in their iTunes account. In addition, the user can restart an expired subscription in their iTunes account.
This mechanism makes it possible for a server process to track the auto-renewing subscription renewal process rather than do so on the app. It also turns out that the cancellation of the auto-renewing subscription item can be detected in the same manner. The user can decide later to start the auto-renewing subscription item again. The length of your explanations indicates the main issue with in-app purchases: they are too complex, not only for developers, but particularly also for end users.
Search on Cydia for AppSync and install that too. Without being signed, the iPhone will not run the app. If the default repos installed by Cydia cannot find AppSync, the Hackyouriphone. Use the second method to download and install it. You may have to restart your iPhone after everything has downloaded, you may not. You should be taken directly to the download, installation or confirmation page instead of the payment page. If you are taken to the payment page as you normally would, IAP Cracker will not work properly.
In that case, make sure that AppSync is installed and working. You can also add your phone or repeat the above process. Also, keep in mind that IAP Cracker supports a lot of games and apps, but not all. Any of these may support the app you are using.
If you are using the very latest iOS version, a compatible Cydia version may not be jailbroken. Cydia currently supports iOS You might be lucky and be able to find the app immediately. Do a Cydia search for AppSync and install that too. Without being signed the iPhone will not run the app. If the default Cydia installed repos cannot find AppSync the Hackyouriphone. Use the second method to download and install it. You may need to reboot your iPhone once everything has downloaded, you may not.
You should be taken directly to the download, install or confirmation page rather than the payment page. In that case, make sure AppSync is installed and working. Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to detect "IAP crackers"? Ask Question. Asked 10 years, 1 month ago.
Active 6 years, 6 months ago. Viewed 41k times. Improve this question. Peter O. If you read about or tell here on stackoverflow the developers of a cracking tool how to prevent it from working, they probably can quickly change the tool to make it work again, given what you told them.
So nobody who wants to prevent the tool from working can tell you here. Add a comment. Active Oldest Votes. If the added functionality takes the form of an data file then this might be an encryption key to unscramble that file, if it's all in code then it's a bit harder but there are lots of creative solutions out there encrypted string constants, e.
Whatever it is, though, it should rely on or check for the presence of some piece of data that it'll get from your web server.
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