SwiftUI boilerplate that ships like an App Store app

// StoreKit 2 - native iOS purchases, not a wrapper
@Environment(PurchasesManager.self) private var purchases
@State private var products: [Product] = []

var body: some View {
    List(products) { product in
        Button {
            Task { await purchases.purchase(product) }
        } label: {
            Text(product.displayName)
        }
    }
    .task {
        products = try? await Product.products(
            for: ["pro.monthly", "pro.yearly"]
        )
    }
}

// Subscription status updates automatically
var isProUser: Bool {
    guard let status = purchases.subscriptionStatus
    else { return false }
    return status.isActive
}