# 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

# StoreTransaction

A public wrapper around store transaction data in Flutter SDK events.

## Purpose

Represents store transaction metadata attached to Superwall events and restore events.

## Signature

```dart
class StoreTransaction {
  final String configRequestId;
  final String appSessionId;
  final DateTime? transactionDate;
  final String originalTransactionIdentifier;
  final String? storeTransactionId;
  final DateTime? originalTransactionDate;
  final String? webOrderLineItemID;
  final String? appBundleId;
  final String? subscriptionGroupId;
  final bool? isUpgraded;
  final DateTime? expirationDate;
  final String? offerId;
  final DateTime? revocationDate;
}
```

## Properties

<TypeTable
  type="{
  configRequestId: {
    type: &#x22;String&#x22;,
    description: &#x22;Identifier for the config request associated with the transaction.&#x22;,
    required: true,
  },
  appSessionId: {
    type: &#x22;String&#x22;,
    description: &#x22;Identifier for the app session associated with the transaction.&#x22;,
    required: true,
  },
  transactionDate: {
    type: &#x22;DateTime?&#x22;,
    description: &#x22;When the transaction occurred.&#x22;,
  },
  originalTransactionIdentifier: {
    type: &#x22;String&#x22;,
    description: &#x22;Original transaction identifier from the store.&#x22;,
    required: true,
  },
  storeTransactionId: {
    type: &#x22;String?&#x22;,
    description: &#x22;Store transaction identifier, when available.&#x22;,
  },
  originalTransactionDate: {
    type: &#x22;DateTime?&#x22;,
    description: &#x22;When the original transaction occurred.&#x22;,
  },
  webOrderLineItemID: {
    type: &#x22;String?&#x22;,
    description: &#x22;Web order line item identifier, when available.&#x22;,
  },
  appBundleId: {
    type: &#x22;String?&#x22;,
    description: &#x22;App bundle identifier associated with the transaction.&#x22;,
  },
  subscriptionGroupId: {
    type: &#x22;String?&#x22;,
    description: &#x22;Subscription group identifier, when available.&#x22;,
  },
  isUpgraded: {
    type: &#x22;bool?&#x22;,
    description: &#x22;Whether the transaction represents an upgrade.&#x22;,
  },
  expirationDate: {
    type: &#x22;DateTime?&#x22;,
    description: &#x22;Expiration date for the transaction, when applicable.&#x22;,
  },
  offerId: {
    type: &#x22;String?&#x22;,
    description: &#x22;Offer identifier associated with the transaction.&#x22;,
  },
  revocationDate: {
    type: &#x22;DateTime?&#x22;,
    description: &#x22;Revocation date, when the transaction has been revoked.&#x22;,
  },
}"
/>

## Usage

```dart
void handleSuperwallEvent(SuperwallEventInfo eventInfo) {
  final transaction = eventInfo.event.transaction;
  if (transaction == null) {
    return;
  }

  print('Transaction: ${transaction.storeTransactionId}');
  print('Original ID: ${transaction.originalTransactionIdentifier}');
}
```

## Related

* [`SuperwallDelegate`](/docs/flutter/sdk-reference/SuperwallDelegate)