4.16.1

[yusuftor]

Changes in this pull request

Promotes develop → master for the 4.16.1 patch release.

Fixes

• Corrects the compiler directive gating the Apple billing-plan APIs (PricingTerms / BillingPlanType / the billing-plan purchase option). Those symbols ship in the Xcode 26.5 SDK (Swift 6.3.2); the previous #if compiler(>=6.3) gate let the code compile against the Xcode 26.4 SDK — which backdates their runtime availability to iOS 26.4 but doesn't include the symbols — and failed with 'PricingTerms' is not a member type of 'Product.SubscriptionInfo'. The gates are now #if compiler(>=6.3.2), so the SDK builds on Xcode 26.4 (block excluded) and 26.5+ (block compiled).

Checklist

• All unit tests pass.
• All UI tests pass.
• Demo project builds and runs on iOS.
• Demo project builds and runs on Mac Catalyst.
• Demo project builds and runs on visionOS.
• I added/updated tests or detailed why my change isn't tested.
• I added an entry to the CHANGELOG.md for any breaking changes, enhancements, or bug fixes.
• I have run swiftlint in the main directory and fixed any issues.
• I have updated the SDK documentation as well as the online docs.
• I have reviewed the contributing guide

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Greptile Summary

This PR prepares the 4.16.1 patch release. The main changes are:

• Bumps the SDK version to 4.16.1.
• Adds the 4.16.1 changelog entry.
• Tightens StoreKit billing-plan API gates to Swift compiler 6.3.2+.
• Reports newer Swift compiler patch versions in device attributes.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.
• The StoreKit billing-plan symbols are consistently guarded by the tighter compiler check.
• The release version sources changed in this PR match each other.

Important Files Changed

Filename	Overview
CHANGELOG.md	Adds the 4.16.1 release note for the billing-plan compiler gate fix.
Sources/SuperwallKit/Misc/Constants.swift	Updates the runtime SDK version string from 4.16.0 to 4.16.1.
Sources/SuperwallKit/Network/Device Helper/SwiftVersion.swift	Adds compiler-version branches for Swift 6.3.2, 6.3.3, and 6.4.
Sources/SuperwallKit/StoreKit/Products/StoreProduct/SK2StoreProduct.swift	Raises the compile-time gate for billing-plan pricing-term APIs to Swift compiler 6.3.2+.
Sources/SuperwallKit/StoreKit/Transactions/Purchasing/StoreKit 2/ProductPurchaserSK2.swift	Raises the compile-time gate for the StoreKit 2 billing-plan purchase option to Swift compiler 6.3.2+.
SuperwallKit.podspec	Updates the CocoaPods package version from 4.16.0 to 4.16.1.

_{Reviews (1): Last reviewed commit: "Update version" | Re-trigger Greptile}

Context used:

• Context used - CLAUDE.md (source)

[pullfrog]

✅ No new issues found.

Reviewed changes — patch release 4.16.1 promoting develop → master, centered on a single compiler-directive fix plus version bumps.

• Correct the billing-plan SDK gate — the Apple billing-plan StoreKit symbols (Product.SubscriptionInfo.PricingTerms / BillingPlanType / Product.PurchaseOption.billingPlanType(_:)) first ship in the Xcode 26.5 SDK (Swift 6.3.2), not Xcode 26.4 (Swift 6.3). The three #if compiler(>=6.3) gates wrapping those symbols (SK2StoreProduct.swift:46, :243, ProductPurchaserSK2.swift:104) now use >=6.3.2, so the SDK compiles on Xcode 26.4 (block excluded) and 26.5+ (block compiled). The unchanged @available(iOS 26.4, …) runtime gates remain correct.
• Extend version-reporting cascade — SwiftVersion.swift currentCompilerVersion() now recognizes 6.4 / 6.3.3 / 6.3.2, with correct newest→oldest #elseif ordering. Analytics string only.
• Version bumps — Constants.swift sdkVersion, SuperwallKit.podspec s.version, and a new CHANGELOG.md entry all advance to 4.16.1.

The fix is mechanically consistent: every gate wrapping a 26.4-only StoreKit symbol moved to >=6.3.2, while Superwall's own AppStoreProduct.BillingPlanType (a plain Int-backed enum) correctly stays ungated. All three version-bearing files agree on 4.16.1. The change is compile-time gating only, so runtime behavior is unaffected. Two non-blocking nits below.

ℹ️ Nitpicks

• ProductPurchaserSK2.swift:104 — the removed comment block explained the billing-plan fallback (older runtime / no configured plan → Apple's default plan). Minor context loss; the parallel feature comment in SK2StoreProduct.swift still documents the mechanism, so this is fine.
• CHANGELOG.md:9 — "builds in Xcode version 26.4" is accurate but understates the fix; the directive change is what keeps the 26.5-only symbols out of the 26.4 build. Consider noting it gates Xcode 26.5 SDK symbols.

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