# 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

# PresentationResult

The result of a paywall presentation attempt.

## Purpose

Represents the possible outcomes when checking or presenting a paywall. Used by [`getPresentationResult()`](/docs/flutter/sdk-reference/getPresentationResult) and paywall presentation handlers.

## Signature

```dart
sealed class PresentationResult {
  factory PresentationResult.placementNotFound() = PlacementNotFoundPresentationResult;
  factory PresentationResult.noAudienceMatch() = NoAudienceMatchPresentationResult;
  factory PresentationResult.paywall(Experiment experiment) = PaywallPresentationResult;
  factory PresentationResult.holdout(Experiment experiment) = HoldoutPresentationResult;
  factory PresentationResult.paywallNotAvailable() = PaywallNotAvailablePresentationResult;
}

class PlacementNotFoundPresentationResult extends PresentationResult;
class NoAudienceMatchPresentationResult extends PresentationResult;
class PaywallPresentationResult extends PresentationResult {
  final Experiment experiment;
}
class HoldoutPresentationResult extends PresentationResult {
  final Experiment experiment;
}
class PaywallNotAvailablePresentationResult extends PresentationResult;
```

## Cases

<TypeTable
  type="{
}"
/>

## Experiment Information

When a paywall is presented or the user is in a holdout group, the result includes an `Experiment` object:

```dart
class Experiment {
  final String id;
  final String groupId;
}
```

* `id` - The unique identifier for the experiment
* `groupId` - The identifier for the experiment group the user is in

## Usage

Handling different presentation results:

```dart
final result = await Superwall.shared.getPresentationResult('premium_feature');

if (result is PaywallPresentationResult) {
  // Paywall would be shown
  final experimentId = result.experiment.id;
  final groupId = result.experiment.groupId;
  print('Experiment: $experimentId, Group: $groupId');
} else if (result is HoldoutPresentationResult) {
  // User is in holdout
  print('User in holdout for experiment ${result.experiment.id}');
} else if (result is NoAudienceMatchPresentationResult) {
  // No audience match
  print('No audience match for placement');
} else if (result is PlacementNotFoundPresentationResult) {
  // Placement not found
  print('Placement not found');
} else if (result is PaywallNotAvailablePresentationResult) {
  // Paywall not available
  print('Paywall not available');
}
```

Using pattern matching:

```dart
final result = await Superwall.shared.getPresentationResult('premium_feature');

switch (result) {
  case PaywallPresentationResult(experiment: final exp):
    // Handle paywall presentation
    print('Paywall for experiment ${exp.id}');
  case HoldoutPresentationResult(experiment: final exp):
    // Handle holdout
    print('Holdout for experiment ${exp.id}');
  case NoAudienceMatchPresentationResult():
    // Handle no match
    print('No audience match');
  case PlacementNotFoundPresentationResult():
    // Handle not found
    print('Placement not found');
  case PaywallNotAvailablePresentationResult():
    // Handle not available
    print('Paywall not available');
}
```

## Related

* [`getPresentationResult()`](/docs/flutter/sdk-reference/getPresentationResult) - Gets presentation result without showing paywall
* [`registerPlacement()`](/docs/flutter/sdk-reference/register) - Registers and presents a paywall
* [`PaywallPresentationHandler`](/docs/flutter/sdk-reference/PaywallPresentationHandler) - Handles paywall presentation lifecycle