Crossdeck Docs

One SDK. Subscriptions, analytics, and errors.

Install the SDK once. Verify revenue across Apple, Google Play, and Stripe. Capture behavioural events, sessions, and runtime errors — all attached to the same customer record. Setup is layered, evidence-based, and observable end-to-end.

Popular: Web SDK isEntitled captureError Connect Stripe Identify users Source maps

Quickstart

Three paths to your first verified signal.

Pick the surface you're shipping. Each guide takes about ten minutes and ends with a verified signal in the Crossdeck dashboard — covering all three pillars: subscriptions, analytics, and errors.

~ 10 min

Web quickstart

Install @cross-deck/web, identify the user, capture your first error, and check an entitlement — all from one snippet.

Start

~ 10 min

iOS quickstart

Add the Swift Package, configure with your public SDK key, send your first event, capture an error, and verify entitlement state.

Start

~ 8 min

Connect a payment rail

Wire Apple, Google Play, or Stripe so Crossdeck can verify subscriptions, refunds, and renewals from the source.

Start

Browse by area

Start with the part you're implementing.

Getting started

Set up the project, register your apps, and verify the first signal.

SDKs

One mental model across iOS, Android, web, and your server.

Payment rails

Connect Apple, Google, and Stripe with verified webhooks and signed events.

Products & entitlements

Products are what users buy. Entitlements are what your app unlocks.

Revenue intelligence

Track revenue state in real time as it changes — across every rail.

Analytics

Privacy-safe product behaviour — sessions, page views, custom events — joined to revenue and errors.

Errors

Capture uncaught exceptions, network failures, and runtime errors — with the paying customer attached. Real-time on every tier.

Get a feel

One SDK. All three pillars.

Configure once. Identify users. Track behaviour. Capture errors. Ask Crossdeck for entitlement state. Same shape on iOS, Android, web — and the server when v2.0 ships.

The six primitives

Crossdeck SDKs expose the same lifecycle in platform-native syntax. Learn it once, recognise it everywhere.

configure — initialise with your app ID and public SDK key
identify — link the current user to your auth ID
track — send a behavioural event (page view, action, custom)
captureError — report an exception with optional context
isEntitled — ask for the verified access state
syncPurchases — forward purchase evidence for verification

Crossdeck SDK

import Crossdeck

// Auto-tracks app lifecycle + screen views and uncaught errors.
Crossdeck.configure(
    appId: "app_ios_acme01",
    publicKey: "cd_pub_live_xxx",
    environment: "production"
)

if let userId = AuthService.shared.currentUser?.id {
    await Crossdeck.identify(userId)
}

// Behavioural event
Crossdeck.track("Export.used")

// Manually report a caught error
do { try await processCheckout() }
catch { Crossdeck.captureError(error) }

// isEntitled is sync — no await
if Crossdeck.isEntitled("pro") {
    showProFeatures()
}

import app.cross_deck.Crossdeck

// Auto-tracks app lifecycle + screen views and uncaught exceptions.
Crossdeck.configure(
    context = this,
    appId = "app_android_acme01",
    publicKey = "cd_pub_live_xxx",
    environment = "production"
)

val userId = authRepository.currentUser?.id
if (userId != null) Crossdeck.identify(userId)
Crossdeck.track("Export.used")

// Manually report a caught exception
try { processCheckout() }
catch (e: Exception) { Crossdeck.captureError(e) }

if (Crossdeck.isEntitled("pro")) {
    showProFeatures()
}

import { Crossdeck } from "@cross-deck/web"

// One init. Subscriptions + analytics + errors all activate together.
// Auto-tracks page.viewed, sessions, and uncaught errors.
Crossdeck.init({
  publicKey: "cd_pub_live_xxx",
})

// After your auth resolves the signed-in user
if (session?.user?.id) await Crossdeck.identify(session.user.id)

// Behavioural event
Crossdeck.track("checkout_started", { product: "annual_pro" })

// Manually report a caught error
try { await processCheckout() }
catch (err) { Crossdeck.captureError(err) }

// Real-time entitlement check — under 50ms, no await.
if (Crossdeck.isEntitled("pro")) showProFeatures()

Install with AI tools

Built for the AI-assisted development era.

Generate exact install prompts for the AI coding tools your team already uses. Each prompt includes your app ID, public SDK key, and a typed task list.

⌘

Install in Cursor Generate a SwiftUI install prompt with your project context.

◆

Install with Claude Code One prompt, complete iOS or web setup with file edits and tests.

Install in a Next.js app App Router or Pages Router — server actions and edge ready.

▲

Install in a SwiftUI app StoreKit 2 first, with App Store Connect setup walkthrough.

Need help verifying setup or production state?

The Crossdeck team helps developers verify SDK heartbeat, payment-rail credentials, product mappings, entitlement projections, and the sandbox-to-production handover.

Contact support Start free