# 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

# Superwall

The shared instance of Superwall that provides access to all SDK features.

> **Note:** You must call [`configure()`](/docs/ios/sdk-reference/configure) before accessing `Superwall.shared`, otherwise your app will crash.

## Purpose

Provides access to the configured Superwall instance after calling [`configure()`](/docs/ios/sdk-reference/configure).

## Signature

```swift
public static var shared: Superwall { get }
public var eventTrackingBehavior: EventTrackingBehavior { get set }
```

## Parameters

This is a computed property with no parameters.

## Returns / State

Returns the shared `Superwall` instance that was configured via [`configure()`](/docs/ios/sdk-reference/configure).

## Usage

Configure first (typically in AppDelegate or SceneDelegate):

```swift
Superwall.configure(apiKey: "pk_your_api_key")
```

Then access throughout your app:

```swift
Superwall.shared.register(placement: "feature_access") {
  // Feature code here
}
```

Set user identity and attributes:

```swift
Superwall.shared.identify(userId: "user123")

Superwall.shared.setUserAttributes([
  "plan": "premium",
  "signUpDate": Date()
])
```

Change event collection at runtime:

```swift
// Stop SDK event collection after the user opts out.
Superwall.shared.eventTrackingBehavior = .none

// Keep Superwall's internal events, but suppress app-sent events and user attributes.
Superwall.shared.eventTrackingBehavior = .superwallOnly

// Restore the default behavior.
Superwall.shared.eventTrackingBehavior = .all
```

This property is available in iOS SDK `4.16.0` and later. It updates the SDK's event queue and the currently displayed paywall, so your app can respond to consent changes without reconfiguring Superwall. If you need an initial value before the SDK is configured, set [`SuperwallOptions.eventTrackingBehavior`](/docs/ios/sdk-reference/SuperwallOptions) before calling [`configure()`](/docs/ios/sdk-reference/configure).

Reset the user:

```swift
Superwall.shared.reset()
```

> **Note:** Avoid calling `Superwall.shared.reset()` repeatedly. Resetting rotates the anonymous user ID, clears local paywall assignments, and requires the SDK to re-download configuration state. Only trigger a reset when a user explicitly logs out or you intentionally need to forget their identity. See [User Management](/docs/ios/quickstart/user-management) for more guidance.

Set delegate:

```swift
Superwall.shared.delegate = self
```

Override products:

```swift
Superwall.shared.overrideProductsByName = [
  "primary": "produceID_to_replace_primary_product"
]
```

Access customer info:

```swift
// Get current customer info
let customerInfo = Superwall.shared.customerInfo

// Get customer info asynchronously
let customerInfo = await Superwall.shared.getCustomerInfo()

// Observe customer info changes
Superwall.shared.$customerInfo
  .sink { customerInfo in
    print("Customer has \(customerInfo.subscriptions.count) subscriptions")
  }
  .store(in: &cancellables)
```

Set integration attributes:

```swift
Superwall.shared.setIntegrationAttributes([
  .amplitudeUserId: "user123",
  .mixpanelDistinctId: "distinct456",
  .firebaseInstallationId: "abc123"
])
```

Get device attributes:

```swift
let deviceAttributes = await Superwall.shared.getDeviceAttributes()
// Use in audience filters or for debugging
print("Device attributes: \(deviceAttributes)")
```

Confirm all experiment assignments:

```swift
// Get all experiment assignments
let assignments = await Superwall.shared.confirmAllAssignments()
print("Confirmed \(assignments.count) assignments")
```

Manually refresh configuration (development-only):

```swift
// Useful when hot-reloading paywalls during development
await Superwall.shared.refreshConfiguration()
```