# 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

# getPaywall()

A function that retrieves a PaywallViewController for custom presentation.

> **Warning:** You're responsible for ensuring the returned `PaywallViewController` is no longer presented or embedded in a view after the user has moved past the paywall. The app may crash if you or the SDK attempts to present the same `PaywallViewController` instance again from elsewhere. Be especially careful when mixing `register()` and `getPaywall()`, which is not recommended.

> **Note:** The remotely configured presentation style is ignored when using this method. You must handle presentation styling programmatically.

## Purpose

Retrieves a PaywallViewController that you can present however you want, bypassing Superwall's automatic presentation logic.

## Signature

```swift
// Async/await version
@MainActor
public func getPaywall(
  forPlacement placement: String,
  params: [String: Any]? = nil,
  paywallOverrides: PaywallOverrides? = nil,
  delegate: PaywallViewControllerDelegate,
  onCustomCallback: ((CustomCallback) async -> CustomCallbackResult)? = nil
) async throws -> PaywallViewController

// Completion handler version
public func getPaywall(
  forPlacement placement: String,
  params: [String: Any]? = nil,
  paywallOverrides: PaywallOverrides? = nil,
  delegate: PaywallViewControllerDelegate,
  onCustomCallback: ((CustomCallback) async -> CustomCallbackResult)? = nil,
  completion: @escaping (PaywallViewController?, PaywallSkippedReason?, Error?) -> Void
)
```

## Parameters

<TypeTable
  type="{
  placement: {
    type: &#x22;String&#x22;,
    description: &#x22;The name of the placement as defined on the Superwall dashboard.&#x22;,
    required: true,
  },
  params: {
    type: &#x22;[String: Any]?&#x22;,
    description: &#x22;Optional parameters to pass with your placement for audience filters. Keys beginning with `$` are reserved and will be dropped.&#x22;,
    default: &#x22;nil&#x22;,
  },
  paywallOverrides: {
    type: &#x22;PaywallOverrides?&#x22;,
    description: &#x22;Optional overrides for products and presentation style.&#x22;,
    default: &#x22;nil&#x22;,
  },
  delegate: {
    type: &#x22;PaywallViewControllerDelegate&#x22;,
    description: &#x22;A delegate to handle user interactions with the retrieved PaywallViewController.&#x22;,
    required: true,
  },
  onCustomCallback: {
    type: &#x22;((CustomCallback) async -> CustomCallbackResult)?&#x22;,
    description: &#x22;Optional async handler called when the paywall requests a custom callback. Return a `CustomCallbackResult` to report success or failure back to the paywall. Available in version 4.15.1+.&#x22;,
    default: &#x22;nil&#x22;,
  },
  completion: {
    type: &#x22;@escaping (PaywallViewController?, PaywallSkippedReason?, Error?) -> Void&#x22;,
    description: &#x22;Completion block for the callback version.&#x22;,
    required: true,
  },
}"
/>

## Returns / State

Returns a `PaywallViewController` that you can present. If presentation should be skipped, throws a `PaywallSkippedReason` error.

## Usage

Using async/await:

```swift
Task {
  do {
    let paywallViewController = try await Superwall.shared.getPaywall(
      forPlacement: "premium_feature",
      params: ["source": "settings"],
      delegate: self,
      onCustomCallback: { callback in
        switch callback.name {
        case "validate_email":
          return .success(data: ["validated": true])
        default:
          return .failure()
        }
      }
    )
    
    present(paywallViewController, animated: true)
  } catch let reason as PaywallSkippedReason {
    print("Paywall skipped: \(reason)")
  } catch {
    print("Error getting paywall: \(error)")
  }
}
```

Using completion handler:

```swift
Superwall.shared.getPaywall(
  forPlacement: "premium_feature",
  delegate: self,
  onCustomCallback: { callback in
    .success(data: ["callback": callback.name])
  }
) { paywall, skippedReason, error in
  if let paywall = paywall {
    present(paywall, animated: true)
  } else if let reason = skippedReason {
    print("Paywall skipped: \(reason)")
  } else if let error = error {
    print("Error: \(error)")
  }
}
```