# 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

# identify()

Creates an account with Superwall by linking the provided userId to Superwall's automatically generated alias.

> **Warning:** **Deprecated SDK**We strongly recommend migrating to the new [Superwall Expo SDK](/docs/expo), see our [migration guide](/docs/expo/guides/migrating-react-native) for details.

## Purpose

Creates an account with Superwall by linking the provided `userId` to Superwall's automatically generated alias. Call this function as soon as you have a valid `userId`.

## Signature

```typescript
async identify({
  userId,
  options,
}: {
  userId: string
  options?: IdentityOptions
}): Promise<void>
```

## Parameters

<TypeTable
  type="{
  userId: {
    type: &#x22;string&#x22;,
    description: &#x22;Your user's unique identifier as defined by your backend system.&#x22;,
    required: true,
  },
  options: {
    type: &#x22;IdentityOptions?&#x22;,
    description: &#x22;An optional `IdentityOptions` object. You can set the `restorePaywallAssignments` property to `true` to instruct the SDK to wait to restore paywall assignments from the server before presenting any paywalls. This option should be used only in advanced cases (e.g., when users frequently switch accounts or reinstall the app).&#x22;,
    default: &#x22;undefined&#x22;,
  },
}"
/>

## Returns / State

Returns a Promise that resolves once the identification process is complete.

## Usage

Basic identification:

```typescript
await Superwall.shared.identify({
  userId: "user123"
})
```

With options to restore paywall assignments:

```typescript
import { IdentityOptions } from "@superwall/react-native-superwall"

const options = new IdentityOptions()
options.restorePaywallAssignments = true

await Superwall.shared.identify({
  userId: "user123",
  options: options
})
```

## When to Call

Call `identify()` as soon as you have a valid `userId` in your app. This is typically:

* After user login
* After user registration
* When restoring a previous session
* On app launch if the user is already logged in

## Related

* [`reset()`](/docs/react-native/sdk-reference/Superwall) - Reset the user identity
* [`setUserAttributes()`](/docs/react-native/sdk-reference/setUserAttributes) - Set user attributes after identification