# 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

# RedemptionResult

Result types returned when the Flutter SDK redeems a web checkout link.

## Purpose

Represents the result passed to [`didRedeemLink()`](/docs/flutter/sdk-reference/SuperwallDelegate) after the SDK handles a web checkout redemption link.

## Signature

```dart
sealed class RedemptionResult {}

class RedemptionResultSuccess extends RedemptionResult {
  final String code;
  final RedemptionInfo redemptionInfo;
}

class RedemptionResultError extends RedemptionResult {
  final String code;
  final ErrorInfo error;
}

class RedemptionResultExpiredCode extends RedemptionResult {
  final String code;
  final ExpiredCodeInfo info;
}

class RedemptionResultInvalidCode extends RedemptionResult {
  final String code;
}

class RedemptionResultExpiredSubscription extends RedemptionResult {
  final String code;
  final RedemptionInfo redemptionInfo;
}
```

## Types

<TypeTable
  type="{
  RedemptionResultSuccess: {
    type: &#x22;RedemptionResult&#x22;,
    description: &#x22;The redemption succeeded. Inspect `redemptionInfo` for purchaser, entitlement, ownership, and paywall details.&#x22;,
  },
  RedemptionResultError: {
    type: &#x22;RedemptionResult&#x22;,
    description: &#x22;The SDK could not redeem the code. Inspect `error.message` for the failure reason.&#x22;,
  },
  RedemptionResultExpiredCode: {
    type: &#x22;RedemptionResult&#x22;,
    description: &#x22;The redemption code expired. Inspect `info.resent` and `info.obfuscatedEmail` for email resend details.&#x22;,
  },
  RedemptionResultInvalidCode: {
    type: &#x22;RedemptionResult&#x22;,
    description: &#x22;The redemption code was invalid.&#x22;,
  },
  RedemptionResultExpiredSubscription: {
    type: &#x22;RedemptionResult&#x22;,
    description: &#x22;The subscription associated with the redemption code expired.&#x22;,
  },
}"
/>

## Success Data

<TypeTable
  type="{
  &#x22;RedemptionInfo.ownership&#x22;: {
    type: &#x22;Ownership&#x22;,
    description: &#x22;Whether the redeemed code belongs to an app user or device.&#x22;,
    required: true,
  },
  &#x22;RedemptionInfo.purchaserInfo&#x22;: {
    type: &#x22;PurchaserInfo&#x22;,
    description: &#x22;Purchaser details, including store identifiers for Stripe, Paddle, or another store.&#x22;,
    required: true,
  },
  &#x22;RedemptionInfo.paywallInfo&#x22;: {
    type: &#x22;RedemptionPaywallInfo?&#x22;,
    description: &#x22;Paywall, placement, variant, and experiment details for the redeemed purchase.&#x22;,
  },
  &#x22;RedemptionInfo.entitlements&#x22;: {
    type: &#x22;Set<Entitlement>&#x22;,
    description: &#x22;Entitlements granted by the redeemed purchase.&#x22;,
    required: true,
  },
  &#x22;PurchaserInfo.appUserId&#x22;: {
    type: &#x22;String&#x22;,
    description: &#x22;The app user ID of the purchaser.&#x22;,
    required: true,
  },
  &#x22;PurchaserInfo.email&#x22;: {
    type: &#x22;String?&#x22;,
    description: &#x22;The purchaser email address, when available.&#x22;,
  },
  &#x22;PurchaserInfo.storeIdentifiers&#x22;: {
    type: &#x22;StoreIdentifiers&#x22;,
    typeDescriptionLink: &#x22;/flutter/sdk-reference/StoreIdentifiers&#x22;,
    description: &#x22;Public store identifier details for the redeemed purchase.&#x22;,
    required: true,
  },
}"
/>

## Usage

```dart
void didRedeemLink(RedemptionResult result) {
  switch (result) {
    case RedemptionResultSuccess(redemptionInfo: final info):
      final purchaser = info.purchaserInfo;
      print('Redeemed for ${purchaser.appUserId}');
      break;
    case RedemptionResultError(error: final error):
      print('Redemption failed: ${error.message}');
      break;
    case RedemptionResultExpiredCode(info: final info):
      print('Code expired; resent email: ${info.resent}');
      break;
    case RedemptionResultInvalidCode():
      print('Invalid code');
      break;
    case RedemptionResultExpiredSubscription():
      print('Expired subscription');
      break;
  }
}
```

## Related

* [`StoreIdentifiers`](/docs/flutter/sdk-reference/StoreIdentifiers)
* [`SuperwallDelegate`](/docs/flutter/sdk-reference/SuperwallDelegate)
* [Post-Checkout Redirecting](/docs/flutter/guides/web-checkout/post-checkout-redirecting)