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:

1. Subscription tiers? (multi-select)

• Monthly
• Yearly (with discount)
• Lifetime
• Weekly

1. Features needed?

• Free trial
• Family sharing
• Promotional offers

1. UI style?

• Full paywall screen
• Inline subscription view
• Both

Generation Process

Step 1: Create Core Files

Generate these files:

1. StoreKitManager.swift - Product loading and purchasing
2. SubscriptionStatus.swift - Status tracking
3. PaywallView.swift - Full paywall UI
4. 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

1. Go to App Store Connect > Your App > Subscriptions
2. Create subscription group
3. 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:

1. File > New > File > StoreKit Configuration
2. Add products matching your IDs
3. 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:

swift
@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:

swift
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+):

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

Testing Instructions

1. Create StoreKit Configuration:

• File > New > StoreKit Configuration
• Add your products

1. Edit Scheme:

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

1. Test Purchases:

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

1. 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+)