StoreKit 2 In-App Purchases and Subscriptions Implement in-app purchases, subscriptions, and paywalls using StoreKit 2 on iOS 26+. Use only the modern Product , Transaction , StoreView , and SubscriptionStoreView APIs. Never use the deprecated original StoreKit ( SKProduct , SKPaymentQueue , SKStoreReviewController ). Contents Product Types Loading Products Purchase Flow Transaction.updates Listener Entitlement Checking SubscriptionStoreView (iOS 17+) StoreView (iOS 17+) Subscription Status Checking Restore Purchases App Transaction (App Purchase Verification) Purchase Options SwiftUI Purchase Callbacks Common Mistakes Review Checklist References Product Types Type Enum Case Behavior Consumable .consumable Used once, can be repurchased (gems, coins) Non-consumable .nonConsumable Purchased once permanently (premium unlock) Auto-renewable .autoRenewable Recurring billing with automatic renewal Non-renewing .nonRenewing Time-limited access without automatic renewal Loading Products Define product IDs as constants. Fetch products with Product.products(for:) . import StoreKit enum ProductID { static let premium = "com.myapp.premium" static let gems100 = "com.myapp.gems100" static let monthlyPlan = "com.myapp.monthly" static let yearlyPlan = "com.myapp.yearly" static let all : [ String ] = [ premium , gems100 , monthlyPlan , yearlyPlan ] } let products = try await Product . products ( for : ProductID . all ) for product in products { print ( " ( product . displayName ) : ( product . displayPrice ) " ) } Purchase Flow Call product.purchase(options:) and handle all three PurchaseResult cases. Always verify and finish transactions. func purchase ( _ product : Product ) async throws { let result = try await product . purchase ( options : [ . appAccountToken ( userAccountToken ) ] ) switch result { case . success ( let verification ) : let transaction = try checkVerified ( verification ) await deliverContent ( for : transaction ) await transaction . finish ( ) case . userCancelled : break case . pending : // Ask to Buy or deferred approval -- do not unlock content yet break @unknown default : break } } func checkVerified < T
( _ result : VerificationResult < T
) throws -> T { switch result { case . verified ( let value ) : return value case . unverified ( _ , let error ) : throw error } } Transaction.updates Listener Start at app launch. Catches purchases from other devices, Family Sharing changes, renewals, Ask to Buy approvals, refunds, and revocations. @main struct MyApp : App { private var transactionListener : Task < Void , Error ? init ( ) { transactionListener = listenForTransactions ( ) } var body : some Scene { WindowGroup { ContentView ( ) } } func listenForTransactions ( ) -> Task < Void , Error
{ Task . detached { for await result in Transaction . updates { guard case . verified ( let transaction ) = result else { continue } await StoreManager . shared . updateEntitlements ( ) await transaction . finish ( ) } } } } Entitlement Checking Use Transaction.currentEntitlements for non-consumable purchases and active subscriptions. Always check revocationDate . @Observable @MainActor class StoreManager { static let shared = StoreManager ( ) var purchasedProductIDs : Set < String
= [ ] var isPremium : Bool { purchasedProductIDs . contains ( ProductID . premium ) } func updateEntitlements ( ) async { var purchased = Set < String
( ) for await result in Transaction . currentEntitlements { if case . verified ( let transaction ) = result , transaction . revocationDate == nil { purchased . insert ( transaction . productID ) } } purchasedProductIDs = purchased } } SwiftUI .currentEntitlementTask Modifier struct PremiumGatedView : View { @State private var state : EntitlementTaskState < VerificationResult < Transaction ?> = . loading var body : some View { Group { switch state { case . loading : ProgressView ( ) case . failure : PaywallView ( ) case . success ( let transaction ) : if transaction != nil { PremiumContentView ( ) } else { PaywallView ( ) } } } . currentEntitlementTask ( for : ProductID . premium ) { state in self . state = state } } } SubscriptionStoreView (iOS 17+) Built-in SwiftUI view for subscription paywalls. Handles product loading, purchase UI, and restore purchases automatically. SubscriptionStoreView ( groupID : "YOUR_GROUP_ID" ) . subscriptionStoreControlStyle ( . prominentPicker ) . subscriptionStoreButtonLabel ( . multiline ) . storeButton ( . visible , for : . restorePurchases ) . storeButton ( . visible , for : . redeemCode ) . subscriptionStorePolicyDestination ( url : termsURL , for : . termsOfService ) . subscriptionStorePolicyDestination ( url : privacyURL , for : . privacyPolicy ) . onInAppPurchaseCompletion { product , result in if case . success ( . verified ( let transaction ) ) = result { await transaction . finish ( ) } } Custom Marketing Content SubscriptionStoreView ( groupID : "YOUR_GROUP_ID" ) { VStack { Image ( systemName : "crown.fill" ) . font ( . system ( size : 60 ) ) . foregroundStyle ( . yellow ) Text ( "Unlock Premium" ) . font ( . largeTitle . bold ( ) ) Text ( "Access all features" ) . foregroundStyle ( . secondary ) } } . containerBackground ( . blue . gradient , for : . subscriptionStore ) Hierarchical Layout SubscriptionStoreView ( groupID : "YOUR_GROUP_ID" ) { SubscriptionPeriodGroupSet ( ) } . subscriptionStoreControlStyle ( . picker ) StoreView (iOS 17+) Merchandises multiple products with localized names, prices, and purchase buttons. StoreView ( ids : [ ProductID . gems100 , ProductID . premium ] , prefersPromotionalIcon : true ) . productViewStyle ( . large ) . storeButton ( . visible , for : . restorePurchases ) . onInAppPurchaseCompletion { product , result in if case . success ( . verified ( let transaction ) ) = result { await transaction . finish ( ) } } ProductView for Individual Products ProductView ( id : ProductID . premium ) { iconPhase in switch iconPhase { case . success ( let image ) : image . resizable ( ) . scaledToFit ( ) case . loading : ProgressView ( ) default : Image ( systemName : "star.fill" ) } } . productViewStyle ( . large ) Subscription Status Checking func checkSubscriptionActive ( groupID : String ) async throws -> Bool { let statuses = try await Product . SubscriptionInfo . Status . status ( for : groupID ) for status in statuses { guard case . verified = status . renewalInfo , case . verified = status . transaction else { continue } if status . state == . subscribed || status . state == . inGracePeriod { return true } } return false } Renewal States State Meaning .subscribed Active subscription .expired Subscription has expired .inBillingRetryPeriod Payment failed, Apple is retrying .inGracePeriod Payment failed but access continues during grace period .revoked Apple refunded or revoked the subscription Restore Purchases StoreKit 2 handles restoration via Transaction.currentEntitlements . Add a restore button or call AppStore.sync() explicitly. func restorePurchases ( ) async throws { try await AppStore . sync ( ) await StoreManager . shared . updateEntitlements ( ) } On store views: .storeButton(.visible, for: .restorePurchases) App Transaction (App Purchase Verification) Verify the legitimacy of the app installation. Use for business model changes or detecting tampered installations (iOS 16+). func verifyAppPurchase ( ) async { do { let result = try await AppTransaction . shared switch result { case . verified ( let appTransaction ) : let originalVersion = appTransaction . originalAppVersion let purchaseDate = appTransaction . originalPurchaseDate // Migration logic for users who paid before subscription model case . unverified : // Potentially tampered -- restrict features as appropriate break } } catch { / Could not retrieve app transaction / } } Purchase Options // App account token for server-side reconciliation try await product . purchase ( options : [ . appAccountToken ( UUID ( ) ) ] ) // Consumable quantity try await product . purchase ( options : [ . quantity ( 5 ) ] ) // Simulate Ask to Buy in sandbox try await product . purchase ( options : [ . simulatesAskToBuyInSandbox ( true ) ] ) SwiftUI Purchase Callbacks . onInAppPurchaseStart { product in return true // Return false to cancel } . onInAppPurchaseCompletion { product , result in if case . success ( . verified ( let transaction ) ) = result { await transaction . finish ( ) } } . inAppPurchaseOptions { product in [ . appAccountToken ( userAccountToken ) ] } Common Mistakes 1. Not starting Transaction.updates at app launch // WRONG: No listener -- misses renewals, refunds, Ask to Buy approvals @main struct MyApp : App { var body : some Scene { WindowGroup { ContentView ( ) } } } // CORRECT: Start listener in App init (see Transaction.updates section above) 2. Forgetting transaction.finish() // WRONG: Never finished -- reappears in unfinished queue forever let transaction = try checkVerified ( verification ) unlockFeature ( transaction . productID ) // CORRECT: Always finish after delivering content let transaction = try checkVerified ( verification ) unlockFeature ( transaction . productID ) await transaction . finish ( ) 3. Ignoring verification result // WRONG: Using unverified transaction -- security risk let transaction = verification . unsafePayloadValue // CORRECT: Verify before using let transaction = try checkVerified ( verification ) 4. Using deprecated original StoreKit APIs // WRONG: Original StoreKit (deprecated) let request = SKProductsRequest ( productIdentifiers : [ "com.app.premium" ] ) SKPaymentQueue . default ( ) . add ( payment ) SKStoreReviewController . requestReview ( ) // CORRECT: StoreKit 2 let products = try await Product . products ( for : [ "com.app.premium" ] ) let result = try await product . purchase ( ) try await AppStore . requestReview ( in : windowScene ) 5. Not checking revocationDate // WRONG: Grants access to refunded purchases if case . verified ( let transaction ) = result { purchased . insert ( transaction . productID ) } // CORRECT: Skip revoked transactions if case . verified ( let transaction ) = result , transaction . revocationDate == nil { purchased . insert ( transaction . productID ) } 6. Hardcoding prices // WRONG: Wrong for other currencies and regions Text ( "Buy Premium for $4.99" ) // CORRECT: Localized price from Product Text ( "Buy ( product . displayName ) for ( product . displayPrice ) " ) 7. Not handling .pending purchase result // WRONG: Silently drops pending Ask to Buy default : break // CORRECT: Inform user purchase is awaiting approval case . pending : showPendingApprovalMessage ( ) 8. Checking entitlements only once at launch // WRONG: Check once, never update func appDidFinish ( ) { Task { await updateEntitlements ( ) } } // CORRECT: Re-check on Transaction.updates AND on foreground return // Transaction.updates listener handles mid-session changes. // Also use .task { await storeManager.updateEntitlements() } on content views. 9. Missing restore purchases button // WRONG: No restore option -- App Store rejection risk SubscriptionStoreView ( groupID : "group_id" ) // CORRECT SubscriptionStoreView ( groupID : "group_id" ) . storeButton ( . visible , for : . restorePurchases ) 10. Subscription views without policy links // WRONG: No terms or privacy policy SubscriptionStoreView ( groupID : "group_id" ) // CORRECT SubscriptionStoreView ( groupID : "group_id" ) . subscriptionStorePolicyDestination ( url : termsURL , for : . termsOfService ) . subscriptionStorePolicyDestination ( url : privacyURL , for : . privacyPolicy ) Review Checklist Transaction.updates listener starts at app launch in App init All transactions verified before granting access transaction.finish() called after content delivery Revoked transactions excluded from entitlements .pending purchase result handled for Ask to Buy Restore purchases button visible on paywall and store views Terms of Service and Privacy Policy links on subscription views Prices shown using product.displayPrice , never hardcoded Subscription terms (price, duration, renewal) clearly displayed Free trial states post-trial pricing clearly No original StoreKit APIs ( SKProduct , SKPaymentQueue ) Product IDs defined as constants, not scattered strings StoreKit configuration file set up for testing Entitlements re-checked on Transaction.updates and app foreground Server-side validation uses jwsRepresentation if applicable Consumables delivered and finished promptly Transaction observer types and product model types are Sendable when shared across concurrency boundaries References See references/app-review-guidelines.md for IAP rules (Guideline 3.1.1), subscription display requirements, and rejection prevention. See references/storekit-advanced.md for subscription control styles, offer management, testing patterns, and advanced subscription handling.