# 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

# getDeviceAttributes

Gets properties stored about the device that are used in audience filters.

> **Info:** This method returns all device attributes that can be used in audience filters in the Superwall dashboard.

> **Warning:** `isApplePayAvailable` is deprecated starting in 4.11.2 and now always returns `true`. It will be removed in a future release and should no longer be used in audience filters.

## Purpose

Retrieves a dictionary of device properties that are used when evaluating audience filters. This is useful for debugging audience filter behavior or understanding what device attributes are available.

## Signature

```swift
public func getDeviceAttributes() async -> [String: Any]
```

## Parameters

No parameters.

## Returns / State

Returns a dictionary mapping attribute names to their values. Common attributes include:

* `isApplePayAvailable` - Deprecated in 4.11.2 and always `true` (previously indicated Apple Pay availability)
* `swiftVersion` - The Swift version (available in version 4.7.0+)
* `compilerVersion` - The compiler version (available in version 4.7.0+)
* `localeIdentifier` - The device locale
* `osVersion` - The iOS version
* `model` - The device model
* And many more device-specific attributes

## Usage

Get device attributes:

```swift
let deviceAttributes = await Superwall.shared.getDeviceAttributes()

// Check specific attributes
// `isApplePayAvailable` is deprecated and always true in 4.11.2+

// Print all attributes for debugging
print("Device attributes: \(deviceAttributes)")
```

Use in audience filter debugging:

```swift
Task {
  let attributes = await Superwall.shared.getDeviceAttributes()
  
  // Check if user matches an audience filter condition
  if let swiftVersion = attributes["swiftVersion"] as? String {
    print("Swift version: \(swiftVersion)")
  }
}
```

## Related

* Device attributes are automatically used in audience filters
* `isApplePayAvailable` was added in 4.9.0, updated in 4.10.5, and deprecated in 4.11.2 (now always `true`)
* `swiftVersion` and `compilerVersion` were added in version 4.7.0