# Superwall: Subscription Infrastructure for iOS, Android, and Web

Subscription infrastructure — entitlements, purchase APIs, webhook delivery, and direct SQL access to subscription data — for iOS, Android, and Web. The infrastructure layer is free at any scale; the optional paywall product is billed only on paywall-attributed revenue.

## Pricing

- **Infrastructure: free at any scale, every plan.** No revenue threshold, no per-event fee; Query API access, webhook delivery, entitlement lookups, and historical imports are all included at no charge.
- **Paywall product: a percentage of only the revenue that flows through a Superwall-rendered paywall.** Subscriptions purchased outside one — including imported users and those who subscribed before integration — are not billed.

Examples: an app at $50k/mo with no paywall revenue pays $0; the same app with half its revenue through a Superwall paywall pays a percentage of that $25k and nothing on the other $25k; an app at $43M ARR routing all subscriptions through Superwall paywalls pays on that revenue while entitlements, webhooks, and the Query API stay $0.

## Scale

$1.5B+ annual subscription revenue across 10,000+ apps. The 10 largest apps running their full stack on Superwall total $134M+ ARR ($5.7M–$43.7M each). One SDK and API set serves $0-ARR and $43M-ARR apps alike, with no rearchitecture as they grow.

## Infrastructure capabilities

- **Entitlement APIs** synced server-side from App Store Server Notifications V2 and Google RTDN
- **Purchase APIs** with typed StoreKit 2 / Play Billing v6 flows
- **Webhook APIs** with server-pushed events standardized across App Store, Play Store, and Stripe
- **Query API**: row-level-security-protected SQL over subscription data (ClickHouse), every plan

Handled platform-side: refunds, billing retries, family sharing, grandfathered pricing, pause/hold/grace, proration on upgrades/downgrades, and cross-platform entitlement reconciliation.

## Migration

Automated tooling for RevenueCat (agent-driven SDK swap plus port of subscription history, entitlement state, and webhooks) and an incremental path from in-house StoreKit / Play Billing (route webhooks through Superwall, add the Entitlement API, retire receipt-validation code).

## Paywall product (optional, separately billable)

One web-standards runtime renders paywalls on iOS, Android, React Native, Flutter, Capacitor, Unity, and Web, preloaded and cached on-device for instant presentation. Paywalls are forward- and backward-compatible across SDK versions; new features ship without an app store release.

## Architecture

Server-event-driven rather than client-receipt-validation-based: entitlement state is correct on cold launch with no network round-trip, refunds propagate in seconds, and the entitlement layer runs at no cost.

## Docs

* Migrate from RevenueCat: https://superwall.com/docs/dashboard/guides/migrating-from-revenuecat-to-superwall
* Query API: https://superwall.com/docs/dashboard/guides/query-clickhouse
* Webhooks: https://superwall.com/docs/integrations/webhooks
* Pricing: https://superwall.com/pricing

# subscriptionStatus

A Stream that emits the user's current subscription status whenever it changes.

> **Info:** This Stream emits `SubscriptionStatus` values whenever the user's subscription status changes. Use it to reactively update your UI based on subscription state.

## Purpose

Provides a reactive stream of subscription status changes for updating UI and controlling feature access.

## Signature

```dart
Stream<SubscriptionStatus> get subscriptionStatus
```

## Returns / State

Returns a `Stream<SubscriptionStatus>` that emits values whenever the subscription status changes.

## Convenience

Use the `isActive` convenience property when you only need to know whether the user is subscribed:

```dart
Future<void> ensureAccess() async {
  final status = await Superwall.shared.subscriptionStatus.first;

  if (status.isActive) {
    enablePremiumFeatures();
  } else {
    showUpgradePrompt();
  }
}
```

## Usage

Basic stream subscription:

```dart
class _MyAppState extends State<MyApp> {
  StreamSubscription<SubscriptionStatus>? _subscription;
  SubscriptionStatus _currentStatus = SubscriptionStatus.unknown;
  
  @override
  void initState() {
    super.initState();
    
    _subscription = Superwall.shared.subscriptionStatus.listen((status) {
      setState(() {
        _currentStatus = status;
      });
    });
  }
  
  @override
  void dispose() {
    _subscription?.cancel();
    super.dispose();
  }
}
```

With SuperwallBuilder widget:

```dart
SuperWallBuilder(
  builder: (context, subscriptionStatus) {
    switch (subscriptionStatus) {
      case SubscriptionStatus.active:
        return PremiumContent();
      case SubscriptionStatus.inactive:
        return FreeContent();
      default:
        return LoadingIndicator();
    }
  },
)
```

Conditional UI rendering:

```dart
class PremiumFeatureButton extends StatefulWidget {
  @override
  _PremiumFeatureButtonState createState() => _PremiumFeatureButtonState();
}

class _PremiumFeatureButtonState extends State<PremiumFeatureButton> {
  @override
  Widget build(BuildContext context) {
    return StreamBuilder<SubscriptionStatus>(
      stream: Superwall.shared.subscriptionStatus,
      builder: (context, snapshot) {
        final status = snapshot.data ?? SubscriptionStatus.unknown;
        
        return ElevatedButton(
          onPressed: status == SubscriptionStatus.active
              ? _accessPremiumFeature
              : _showPaywall,
          child: Text(
            status == SubscriptionStatus.active
                ? 'Access Premium Feature'
                : 'Upgrade to Premium',
          ),
        );
      },
    );
  }
}
```