# 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

# Keys

In the **Keys** section under **Settings**, you can easily view or copy your API key, view session starts by the last seven days, and app version sessions from the last seven days.

![](https://2a2314a4-superwall-docs.staffbar.workers.dev/docs/images/overview-settings-keys.png)

### API Key

You'll use your API key to initialize the Superwall client in your apps. Each one is prepended with `pk_` and then the identifier. To easily copy it, **click** the **Copy** icon on the right-hand side:

![](https://2a2314a4-superwall-docs.staffbar.workers.dev/docs/images/overview-settings-keys-copy.png)

> **Note:** These are public SDK keys used to configure Superwall in your app. For scoped organization API keys used by servers, CI jobs, or other backend automation, use [Access Controls](/docs/dashboard/dashboard-settings/overview-settings-access-controls).

### Session starts by SDK version

Use the session starts by SDK chart to see how many sessions are being started, split out by the SDK version of Superwall.

This helps debug any potential issues that may occur by comparing sessions against the version of our SDK users are on. Of course, if your issue appears to be related to Superwall's SDK — always feel free to reach out so we can investigate.

### App version

Similarly, the app version chart helps you narrow down issues by showing sessions split out by app versions. If the use of our SDK didn't change, but your app version did, and an issue is occurring — then it may related to your app specific logic.