Measure in-app purchases

In-app purchases (IAP) are digital content or features that you can sell in a mobile app through Google Play or the Apple App Store so your app doesn't have to process financial transactions. Examples of in-app purchases include subscription-based content or special game pieces.

Analytics shows IAP events in the In-app purchases report.

For Android apps, the Analytics SDK integrates with Google Play. For Apple platform apps, the SDK integrates with the Apple App Store using the StoreKit 1 and StoreKit 2 APIs from Apple.

In most cases, the Analytics SDK automatically collects IAP events without requiring API calls in your app. On iOS, you can also log IAP events manually in a WebView in addition to the automatically collected IAP events. This guide explains how to set up your project for automatic tracking, and describes some special cases that require a few lines of code to implement.

Before you begin

• Set up your Firebase project and your app's codebase as described in Get Started with Google Analytics.

• Link your Firebase project to a Google Analytics 4 property.

Android apps

• Make sure that your app is using the Analytics SDK v17.3.0+ (or Firebase Android BoM v25.2.0+).

• Link your Firebase apps to Google Play.

Apple platform apps

• Make sure that you're using the latest SDK:

  • For automatic in-app purchase tracking: Make sure that your app is using the Analytics SDK v6.20.0+.

  • For manual in-app purchase tracking: Make sure that your app is using the Analytics SDK v12.5.0+.

• Make sure you're familiar with the Apple StoreKit 1 and StoreKit 2 in-app purchase APIs by reviewing the Apple documentation.

Implementation

In most cases, the Analytics SDK automatically logs IAP events without requiring additional code.

Implementation in Android apps

For Android apps, you can measure IAP events as soon as you link to Google Play.

Implementation in Apple platform apps

For iOS apps, if you're using StoreKit 1, the Analytics SDK automatically logs IAP events. If you're using StoreKit 2, you can log verified in-app purchase events using the code snippet below.

Alternatively, if you have a need to track in-app purchases made outside of the App Store, you can log IAP events manually in a WebView. Note that the SDK will continue to automatically log in-app purchases where possible, and won't de-duplicate any manually logged in-app purchase events. Make sure that you're using the Analytics SDK v12.5.0+ when manually tracking in-app purchases.

import StoreKit
import FirebaseAnalytics

// A user tapped a button to purchase an item.
func userTappedPurchaseUpgradeButton() {
  let product = ...
  purchaseSomeProduct(product)
}

func purchaseSomeProduct(_ product: Product) {
  // Purchase a Product. This is mostly standard boilerplate StoreKit 2
  // code, except for the Analytics.logTransaction() call.
  let result = try await product.purchase()
  switch result {
  case .success(let verification):
      let transaction = try checkVerified(verification)

      // Call this Firebase API to log the in-app purchase event.
      Analytics.logTransaction(transaction)

      await transaction.finish()
  ...
}