# 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

# getPresentationResult()

Check the outcome of a placement without presenting a paywall.

## Purpose

Retrieves the presentation result for a placement without presenting the paywall. Call this when you need to know whether a placement would show a paywall, send the user to a holdout, or fail due to missing configuration before you decide how to render UI.

## Signature

```dart
Future<PresentationResult> getPresentationResult(
  String placement, {
  Map<String, Object>? params,
})
```

## Parameters

<TypeTable
  type="{
  placement: {
    type: &#x22;String&#x22;,
    description: &#x22;The name of the placement to check.&#x22;,
    required: true,
  },
  params: {
    type: &#x22;Map<String, Object>?&#x22;,
    description: &#x22;Optional parameters to pass with the placement. These can be referenced within campaign rules. Keys beginning with `$` are reserved for Superwall and will be dropped. Nested maps and lists are currently unsupported and will be ignored.&#x22;,
    default: &#x22;null&#x22;,
  },
}"
/>

## Returns / State

Returns a `Future<PresentationResult>` that resolves to one of the following:

* `PlacementNotFoundPresentationResult` - The placement was not found
* `NoAudienceMatchPresentationResult` - No audience match for the placement
* `PaywallPresentationResult` - A paywall would be presented (contains experiment information)
* `HoldoutPresentationResult` - User is in a holdout group (contains experiment information)
* `PaywallNotAvailablePresentationResult` - Paywall is not available

## Usage

Checking if a paywall would be shown:

```dart
final result = await Superwall.shared.getPresentationResult(
  'premium_feature',
  params: {'source': 'onboarding'},
);

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

Using with switch expressions:

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

switch (result) {
  case PaywallPresentationResult(experiment: final exp):
    print('Paywall would show for experiment ${exp.id}');
  case HoldoutPresentationResult(experiment: final exp):
    print('User in holdout for experiment ${exp.id}');
  case NoAudienceMatchPresentationResult():
    print('No audience match');
  case PlacementNotFoundPresentationResult():
    print('Placement not found');
  case PaywallNotAvailablePresentationResult():
    print('Paywall not available');
}
```

## Related

* [`registerPlacement()`](/docs/flutter/sdk-reference/register) - Registers and presents a paywall
* [`PresentationResult`](/docs/flutter/sdk-reference/PresentationResult) - The result type returned by this method