# 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

# CustomerCenterDelegate

Receive callbacks for Customer Center actions, restores, surveys, refunds, and dismissal.

## Purpose

Pass a `CustomerCenterDelegate` to [`Superwall.instance.presentCustomerCenter()`](/docs/android/sdk-reference/Superwall#present-the-customer-center-285) to observe or handle Customer Center interactions. All methods have default implementations and run on the main thread. The SDK retains the delegate only while the Customer Center is presented.

## Signature

```kotlin
interface CustomerCenterDelegate {
    fun customerCenterShouldRestorePurchases(proceed: (Boolean) -> Unit) {
        proceed(true)
    }

    fun customerCenterDidSelectAction(
        action: CustomerCenterAction,
        pathId: String,
        purchase: CustomerCenterPurchase?
    ) {}

    fun customerCenterDidCompleteSurvey(
        surveyId: String,
        optionId: String,
        action: CustomerCenterAction,
        pathId: String
    ) {}

    fun customerCenterDidCompleteRefundRequest(
        productId: String,
        status: CustomerCenterRefundStatus
    ) {}

    fun customerCenterDidDismiss() {}
}
```

## Callbacks

* `customerCenterShouldRestorePurchases(proceed)` runs before a restore starts. Call `proceed(true)` to continue or `proceed(false)` to cancel. Call it exactly once; restoration waits for the decision and ignores later calls.
* `customerCenterDidSelectAction(action, pathId, purchase)` runs when a path is selected, before its action. `purchase` is `null` for screen-level actions such as restore. Custom paths do not perform an app-specific action automatically; route them from this callback.
* `customerCenterDidCompleteSurvey(surveyId, optionId, action, pathId)` reports the selected survey option.
* `customerCenterDidCompleteRefundRequest(productId, status)` reports whether the refund request could be handed off. On Android, `SUCCESS` means Google Play was opened and `ERROR` means it could not be opened. `USER_CANCELLED` is not reported on Android because the SDK cannot observe when a customer leaves Google Play's page.
* `customerCenterDidDismiss()` runs when the Customer Center is dismissed. You can also pass an `onDismiss` callback to `presentCustomerCenter()`.

`CustomerCenterAction` identifies the selected built-in action (`Restore`, `ManageSubscription`, `Refund`, `ChangePlan`, or `ContactSupport`) or a `Url` or `Custom` action. `CustomerCenterPurchase` describes the purchase associated with a path, when there is one. Its `entitlements` may include entitlements the purchase no longer grants, so check each entitlement's `isActive` value before treating it as current.

## Usage

```kotlin
val delegate = object : CustomerCenterDelegate {
    override fun customerCenterShouldRestorePurchases(proceed: (Boolean) -> Unit) {
        // For example, ask the customer to sign in before restoring.
        proceed(true)
    }

    override fun customerCenterDidSelectAction(
        action: CustomerCenterAction,
        pathId: String,
        purchase: CustomerCenterPurchase?
    ) {
        if (action is CustomerCenterAction.Custom) {
            openBillingSettings(action.identifier)
        }
    }

    override fun customerCenterDidCompleteSurvey(
        surveyId: String,
        optionId: String,
        action: CustomerCenterAction,
        pathId: String
    ) {
        analytics.track("customer_center_survey", mapOf("option_id" to optionId))
    }
}

Superwall.instance.presentCustomerCenter(delegate = delegate)
```

## Related

* [Customer Center guide](/docs/android/guides/customer-center)
* [`CustomerCenterConfiguration`](/docs/android/sdk-reference/CustomerCenterConfiguration)
* [`SuperwallEvent`](/docs/android/sdk-reference/SuperwallEvent)