Does it include SwiftUI examples?

Yes, the reference provides code snippets for modern SwiftUI components like ProductView and SubscriptionStoreView.

Can I use this for implementing auto-renewable subscriptions?

Absolutely. It covers subscription groups, periods, introductory offers, and handling subscription status changes.

Does this skill support the latest iOS features?

Yes, it includes full support for iOS 18.4 enhancements such as appTransactionID, offerPeriod, and advancedCommerceInfo.

Does it provide guidance on transaction listeners?

Yes, it includes critical implementation patterns for real-time transaction listeners to handle purchases, renewals, and revocations.

How does StoreKit 2 differ from StoreKit 1 in this guide?

This guide emphasizes StoreKit 2's use of async/await, automatic JWS verification, and simplified transaction types compared to the legacy framework.

StoreKit 2 API Reference

Name: StoreKit 2 API Reference
Author: CharlesWiltgen

byCharlesWiltgen

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233

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Mobile Development

Provides a comprehensive, battle-tested reference for implementing StoreKit 2 in-app purchases and subscriptions on modern Apple platforms.

This skill serves as the definitive guide for Apple developers using Claude Code to implement or maintain in-app purchase systems. It covers the entirety of the StoreKit 2 API, including the latest iOS 18.4 enhancements like appTransactionID and offerPeriod, alongside modern Swift concurrency patterns and WWDC 2025 code examples. It is an essential resource for planning subscription architectures, debugging transaction issues, and integrating pre-built SwiftUI purchase views like SubscriptionStoreView.

Key Features

01Updated coverage for iOS 18.4 features including appTransactionID and offerPeriod

02233 GitHub stars

03Comprehensive patterns for JWS verification and transaction listener setups

04Battle-tested WWDC 2025 code examples for modern Swift concurrency

05Complete StoreKit 2 API documentation for Product and Transaction types

06Guidance on SwiftUI purchase views (ProductView, SubscriptionStoreView)

Use Cases

01Implementing auto-renewable subscriptions with complex trial and introductory offers

02Migrating legacy StoreKit 1 codebases to modern async/await StoreKit 2 patterns

03Debugging transaction lifecycle issues and entitlement verification logic

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add charleswiltgen/axiom axiom-storekit-ref

For use in Claude.ai and ChatGPT

Download Skill