Paywall Generator Skill for Claude

Paywall Generator

Generate a complete StoreKit 2 subscription paywall with modern SwiftUI views, subscription status tracking, and proper purchase handling.

When This Skill Activates

Use this skill when the user:

• Asks to "add subscriptions" or "add paywall"
• Mentions "in-app purchases" or "IAP"
• Wants "StoreKit 2" implementation
• Asks about "subscription management"
• Mentions "premium features" or "pro version"

Paywall Design Principles (Apple's Data)

• Keep sign-up to 3-4 taps. Per Apple's Tech Talk: 61% conversion at 3 taps, 48% at 4 — collapsing to 7% at 9 taps.
• Make the paywall glanceable — value proposition, price, and renewal/trial terms in one view, no scrolling to find the price.
• Show clear renewal and trial terms everywhere you pitch the subscription, not just on the paywall.
• Persistent entry point over pop-ups — a tasteful, always-available subscribe button (plus subscribe/manage in Settings). Pop-ups train users to dismiss.
• Trigger the offer at moments of interest — when the user taps locked content, not on a timer.
• Offer 3-4 duration tiers so users self-select their commitment level.
• Let users experience value first — free trial (works best for known brands), freemium, or content sampling (e.g., N free articles per month).

Pre-Generation Checks

1. Project Context Detection

• [ ] Check for existing StoreKit implementations
• [ ] Check deployment target (StoreKit 2 requires iOS 15+)
• [ ] Look for existing product IDs in codebase
• [ ] Identify source file locations

2. Conflict Detection

Search for existing StoreKit:

Glob: **/*Store*.swift, **/*Purchase*.swift, **/*Subscription*.swift
Grep: "import StoreKit" or "Product.products"

If found, ask user:

• Replace existing implementation?
• Extend with additional features?

Apple Docs Reference

StoreKit subscription APIs (iOS 18.4+):

• SubscriptionOfferView - New SwiftUI view for merchandising subscriptions
• subscriptionStatusTask modifier for tracking subscription state
• Transaction.currentEntitlements(for:) - per-product entitlement check (iOS 18.4+)
• RenewalInfo enhancements for expiration reasons

Configuration Questions

Ask user via AskUserQuestion:

• Subscription tiers? (multi-select)
• Monthly
• Yearly (with discount)
• Lifetime
• Weekly

• Features needed?
• Free trial
• Family sharing
• Promotional offers

• UI style?
• Full paywall screen
• Inline subscription view
• Both

Generation Process

Step 1: Create Core Files

Generate these files:

• StoreKitManager.swift - Product loading and purchasing
• SubscriptionStatus.swift - Status tracking
• PaywallView.swift - Full paywall UI
• SubscriptionButton.swift - Individual plan button

Step 2: Create Configuration

• Products.swift - Product ID constants

Step 3: Determine File Location

Check project structure:

• If Sources/ exists → Sources/Store/
• If App/ exists → App/Store/
• Otherwise → Store/

Product ID Setup

App Store Connect

• Go to App Store Connect > Your App > Subscriptions
• Create subscription group
• Add subscription products with IDs like:
• com.yourapp.subscription.monthly
• com.yourapp.subscription.yearly
• com.yourapp.subscription.lifetime

StoreKit Configuration (Testing)

Create Products.storekit for local testing:

• File > New > File > StoreKit Configuration
• Add products matching your IDs
• Edit scheme > Options > StoreKit Configuration

Output Format

After generation, provide:

Files Created

Sources/Store/
├── StoreKitManager.swift        # Product loading & purchasing
├── SubscriptionStatus.swift     # Status enum & tracking
├── Products.swift               # Product ID constants
└── Views/
    ├── PaywallView.swift        # Full paywall screen
    ├── SubscriptionButton.swift # Plan selection button
    └── SubscriptionOfferCard.swift # iOS 18.4+ view

Integration Steps

App Entry Point:

@main
struct MyApp: App {
    @State private var subscriptionStatus: SubscriptionStatus = .unknown

    var body: some Scene {
        WindowGroup {
            ContentView()
                .environment(\.subscriptionStatus, subscriptionStatus)
                .subscriptionStatusTask(for: "your.group.id") { statuses in
                    subscriptionStatus = SubscriptionStatus.from(statuses)
                }
        }
    }
}

Show Paywall:

struct ContentView: View {
    @State private var showPaywall = false
    @Environment(\.subscriptionStatus) var status

    var body: some View {
        VStack {
            if status != .subscribed {
                Button("Upgrade to Pro") {
                    showPaywall = true
                }
            }
        }
        .sheet(isPresented: $showPaywall) {
            PaywallView()
        }
    }
}

SubscriptionOfferView (iOS 18.4+):

// Simple merchandising view
SubscriptionOfferView(productID: "com.app.subscription.monthly")
    .prefersPromotionalIcon(true)
    .subscriptionOfferViewDetailAction {
        showPaywall = true
    }

Testing Instructions

• Create StoreKit Configuration:
• File > New > StoreKit Configuration
• Add your products

• Edit Scheme:
• Product > Scheme > Edit Scheme
• Options > StoreKit Configuration > Select your file

• Test Purchases:
• Run in Simulator
• Use Transaction Manager (Debug > StoreKit > Transaction Manager)

• Test Scenarios:
• Purchase flow
• Restore purchases
• Subscription expiration
• Renewal

References

• storekit-patterns.md - Best practices and patterns
• templates/ - All template files
• Apple Docs: StoreKit Updates (iOS 18.4+)