# 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

# PaywallBuilder

A builder class for creating custom PaywallView instances for advanced presentation.

> **Warning:** You're responsible for managing the lifecycle of the returned PaywallView. Do not use the same PaywallView instance in multiple places simultaneously.

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

## Purpose

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

## Signature

```kotlin
class PaywallBuilder(private val placement: String) {
    fun params(params: Map<String, Any>?): PaywallBuilder
    fun overrides(overrides: PaywallOverrides?): PaywallBuilder
    fun delegate(delegate: PaywallViewCallback): PaywallBuilder
    fun activity(activity: Activity): PaywallBuilder
    
    suspend fun build(): Result<PaywallView>
    fun buildSync(): PaywallView
    fun build(onSuccess: (PaywallView) -> Unit, onError: (Throwable) -> Unit)
}
```

## 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;Map<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;,
  },
  overrides: {
    type: &#x22;PaywallOverrides?&#x22;,
    description: &#x22;Optional overrides for products and presentation style.&#x22;,
  },
  delegate: {
    type: &#x22;PaywallViewCallback&#x22;,
    description: &#x22;A delegate to handle user interactions with the retrieved PaywallView.&#x22;,
    required: true,
  },
  activity: {
    type: &#x22;Activity&#x22;,
    description: &#x22;The activity context required for the PaywallView.&#x22;,
    required: true,
  },
}"
/>

## Returns / State

Returns a `Result<PaywallView>` that you can add to your view hierarchy. If presentation should be skipped, returns a failure result.

## Usage

Using with coroutines:

```kotlin
lifecycleScope.launch {
    val result = PaywallBuilder("premium_feature")
        .params(mapOf("source" to "settings"))
        .delegate(object : PaywallViewCallback {
            override fun onFinished(
                paywall: PaywallView,
                result: PaywallResult,
                shouldDismiss: Boolean
            ) {
                // Handle paywall completion
            }
        })
        .activity(this@MainActivity)
        .build()
    
    result.fold(
        onSuccess = { paywallView ->
            binding.container.addView(paywallView)
        },
        onFailure = { error ->
            println("Error creating paywall: ${error.message}")
        }
    )
}
```

Jetpack Compose integration:

```kotlin
@Composable
fun PaywallScreen() {
    PaywallComposable(
        placement = "premium_feature",
        params = mapOf("source" to "settings"),
        delegate = object : PaywallViewCallback {
            override fun onFinished(
                paywall: PaywallView,
                result: PaywallResult,
                shouldDismiss: Boolean
            ) {
                // Handle completion
            }
        },
        errorComposable = { error ->
            Text("Failed to load paywall: ${error.message}")
        },
        loadingComposable = {
            CircularProgressIndicator()
        }
    )
}
```