# 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

# Managing Users

Learn how to manage users in your app.

## Overview

The [`useUser`](/docs/expo/sdk-reference/hooks/useUser) hook provides functions to identify users, sign them out, update their attributes, and access user and subscription status information.

## Example

```tsx
import { useUser } from "expo-superwall";
import { Button, Text, View } from "react-native";

function UserManagementScreen() {
  const { identify, user, signOut, update, subscriptionStatus } = useUser();

  const handleLogin = async () => {
    // Identify the user with a unique ID
    await identify(`user_${Date.now()}`);
  };

  const handleSignOut = async () => {
    await signOut();
  };

  const handleUpdateUserAttributes = async () => {
    // Update custom user attributes
    await update((oldAttributes) => ({
      ...oldAttributes,
      customProperty: "new_value",
      counter: (oldAttributes.counter || 0) + 1,
    }));
  };

  return (
    <View style={{ padding: 20 }}>
      <Text>Subscription Status: {subscriptionStatus?.status ?? "unknown"}</Text>
      {user && <Text>User ID: {user.appUserId}</Text>}
      {user && <Text>User Attributes: {JSON.stringify(user, null, 2)}</Text>}

      <Button title="Login" onPress={handleLogin} />
      <Button title="Sign Out" onPress={handleSignOut} />
      <Button title="Update Attributes" onPress={handleUpdateUserAttributes} />
    </View>
  );
}
```