# 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

# Carousel

Use Superwall's carousel component to have items automatically progress through slides.

### Adding a carousel component

The carousel component was built to make progressing slide designs easy. It's similar to a [slides component](/docs/dashboard/dashboard-creating-paywalls/paywall-editor-slides-component), except it automatically progresses through its contents instead of being primarily gesture driven. To use the carousel component:

1. In the left sidebar, click **+** to add a new element.
2. Choose **Carousel** under the "Layout" header.

![](https://2a2314a4-superwall-docs.staffbar.workers.dev/docs/images/paywall-editor-carousel-component.png)

The carousel component requires an explicit `width` set. Generally, setting this to 100% of the viewport's width works well. This is also the default size set:

![](https://2a2314a4-superwall-docs.staffbar.workers.dev/docs/images/paywall-editor-carousel-width.png)

By default:

* The carousel `Scroll` property is set to `Paging`. Required.
* It's `Wrap` property is set to `Don't Wrap`. Required.
* The `Snap Position` property is set to `Center`. Editable.
* `Auto Paging` is set to `Enabled`. Editable.
* Finally, `Paging Delay` is intentionally set low to help with designing its content. Set it to a higher value to see the carousel in action.

![](https://2a2314a4-superwall-docs.staffbar.workers.dev/docs/images/paywall-editor-carousel-defaults.png)

### Adding contents to carousels

The carousel component has a few demonstration items added to it by default. You can remove these and add your own content:

![](https://2a2314a4-superwall-docs.staffbar.workers.dev/docs/images/paywall-editor-carousel-items.png)

### Tracking or updating the displayed element in a carousel

When a carousel element is added, Superwall automatically creates an element variable for it (accessed through the **[Variables](/docs/dashboard/dashboard-creating-paywalls/paywall-editor-variables)** tab in the left sidebar, or the variables button in the **[floating toolbar](/docs/dashboard/dashboard-creating-paywalls/paywall-editor-floating-toolbar)**). Its name will match whatever is in the element hierarchy in the left sidebar:

![](https://2a2314a4-superwall-docs.staffbar.workers.dev/docs/images/paywall-editor-carousel-vars.png)

You can use this to:

* Select a product based off of the index of the carousel.
* Have a button progress to the next slide.
* Change text using [dynamic values](/docs/dashboard/dashboard-creating-paywalls/paywall-editor-dynamic-values) based on the index.
* etc.

> **Note:** The variable's name is derived by the node's unique identifier. You don't need to set or generally
> be aware of this value.

For example, here the button progresses to the next slide by incrementing the slides `Child Page Index` variable:

![](https://2a2314a4-superwall-docs.staffbar.workers.dev/docs/images/paywall-editor-carousel-update.png)

As another example, we could change the text to represent the different product periods we've set up for our fictional products of weekly, monthly and annual. By using a dynamic value, we can simply check which carousel index is showing and change the text accordingly:

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