# 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

# Install the SDK

Install the Superwall Flutter SDK via pub package manager.

## Overview

To see the latest release, [check out the repository](https://github.com/superwall/Superwall-Flutter).

## Install via pubspec.yaml

To use Superwall in your Flutter project, add `superwallkit_flutter` as a dependency in your `pubspec.yaml` file:

```yaml
dependencies:
  superwallkit_flutter: ^2.4.12
```

After adding the dependency, run `dart pub get` in your terminal to fetch the package.

## Install via Command Line (Alternative)

You can also add the dependency directly from your terminal using the following command:

```bash
$ flutter pub add superwallkit_flutter
```

### iOS Deployment Target

Superwall requires iOS 14.0 or higher. Ensure your Flutter project's iOS deployment target is 14.0 or higher by updating ios/Podfile.

```ruby
platform :ios, '14.0'
```

### Android Configuration

First, add our SuperwallActivity to your `AndroidManifest.xml`:

```xml
   <!-- ... inside your <application> tag  -->
  <activity
    android:name="com.superwall.sdk.paywall.view.SuperwallPaywallActivity"
    android:theme="@style/Theme.MaterialComponents.DayNight.NoActionBar"
    android:configChanges="orientation|screenSize|keyboardHidden">
  </activity>

  <!-- Optional -->
  <activity android:name="com.superwall.sdk.debug.DebugViewActivity" />
  <activity android:name="com.superwall.sdk.debug.localizations.SWLocalizationActivity" />
  <activity android:name="com.superwall.sdk.debug.SWConsoleActivity" />
```

Superwall requires a minimum SDK version of 26 or higher and a minimum compile SDK target of 34. Ensure your Flutter project's Android minimal SDK target is set to 26 or higher and that your compilation SDK target is 34 by updating `android/app/build.gradle`.

```groovy gradle
android {
    ...
    compileSdkVersion 34
    ...
    defaultConfig {
        ...
        minSdkVersion 26
        ...
    }
}
```

To use the compile target SDK 34, you'll also need to ensure your Gradle version is 8.6 or higher and your Android Gradle plugin version is 8.4 or higher.
You can do that by checking your `gradle/wrapepr/gradle-wrapper.properties` file and ensuring it is updated to use the latest Gradle version:

```properties
distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
```

And your `android/build.gradle` file is updated to use the latest Android Gradle plugin version:

```groovy gradle
plugins {
    id 'com.android.application' version '8.4.1' apply false
}
```

To find the latest compatible versions, you can always check the [Gradle Plugin Release Notes](https://developer.android.com/build/releases/gradle-plugin).

<Check>
  **And you're done!**

   Now you're ready to configure the SDK 👇
</Check>