<br />

iOS+ Android  

<br />

| This page assumes that you've added the Google Mobile Ads SDK to your app *as well as* enabled user metrics in your AdMob account and linked AdMob to Firebase. But if you haven't, learn how in the [getting started guide](https://firebase.google.com/docs/admob/ios/quick-start).

After completing the basic AdMob setup, you can also add the Firebase SDK
for Google Analytics to take advantage of other features from
Google Analytics and Firebase. Learn how to [get started with
Google Analytics](https://firebase.google.com/docs/admob/analytics-and-firebase#get-started-analytics)
later on this page.

These increasing levels of configuration support features that can help you
optimize your app's user experience and your ad revenue. Check out the following
table of features and its links to learn more!

|---|---|---|---|
| **Feature** | **Add Mobile Ads SDK + enable user metrics** | Add Mobile Ads SDK + enable user metrics *and* **Link AdMob to Firebase** | Add Mobile Ads SDK + enable user metrics *and* Link AdMob to Firebase *and* **[Add Firebase SDK for Analytics](https://firebase.google.com/docs/admob/analytics-and-firebase#get-started-analytics)** |
| **View user metrics in your AdMob account** ||||
| Automatically collect analytics [events](https://support.google.com/admob/answer/9755157) and [user properties](https://support.google.com/admob/answer/9755590) from your app |   |   |   |
| [View curated user metrics in AdMob](https://support.google.com/admob/answer/9281746) |   |   |   |
| **Explore and work with your analytics data via Firebase** ||||
| [View key metrics in the Firebase console](https://support.google.com/firebase/answer/6317517) |   |   |   |
| [Mark conversions for ad campaigns](https://support.google.com/analytics/answer/9267568) |   |   |   |
| [Build custom audiences](https://support.google.com/analytics/answer/9267572) |   |   |   |
| [Export and analyze data in BigQuery](https://support.google.com/firebase/answer/7030014) |   |   |   |
| **Access more customization features for your analytics data** ||||
| [Log custom events for analytics and models](https://firebase.google.com/docs/analytics/events) (like [logging ecommerce_purchase events](https://firebase.google.com/docs/admob/analytics-and-firebase#arpu-and-arppu) for and metrics) |   |   |   |
| [Configure custom conversions for ad campaigns](https://support.google.com/firebase/answer/6317518#custom) |   |   |   |
| [Use other Firebase products](https://firebase.google.com/docs/admob/analytics-and-firebase#use-firebase-products) (like Remote Config and A/B Testing) |   |   |   |

## Get started with Google Analytics

Google Analytics is Firebase's analytics engine that gives you access to
powerful insights into your data. Start using Google Analytics in your app
by adding the Firebase SDK for Google Analytics.

<br />

Why add the Firebase SDK for Google Analytics?

<br />

With the [basic AdMob setup](https://firebase.google.com/docs/admob/ios/quick-start), you can view
aggregated statistics from automatically collected
[events](https://support.google.com/admob/answer/9755157)
and [user properties](https://support.google.com/admob/answer/9755590)
in the *Analytics* dashboard of the Firebase console without adding any
additional code to your app.

However, if you want to collect additional *custom* event data or user
properties, you'll need to use the Firebase SDK for Google Analytics. With
this SDK, you can log up to 500 different analytics event types, and there's no
limit on the total volume of events your app logs. An example use case for
logging custom events is to include data in your revenue calculation from a
custom event called `ecommerce_purchase` to help you [better represent
and
metrics](https://firebase.google.com/docs/admob/analytics-and-firebase#arpu-and-arppu).

By adding the Firebase SDK for Google Analytics, you can also
[add custom conversions for ad
campaigns](https://support.google.com/firebase/answer/6317518#custom)
and enable the use of [other
Firebase products](https://firebase.google.com/docs/admob/analytics-and-firebase#use-firebase-products).

<br />

<br />

The following steps describe how to start using the Firebase SDK for
Google Analytics in your app. After initializing the SDK, visit the
[Analytics documentation](https://firebase.google.com/docs/analytics/events) to learn how to start
logging events in your app.

### **Step 1:** Add a configuration file to your app

If you registered your app with Firebase before creating an AdMob link, then
you already added a Firebase configuration file to your app.

Check for a `GoogleService-Info.plist` file in the root of your Xcode project.
Also make sure that the config file is added to all targets.


<br />

If you don't have this config file in your app, expand
this section to learn how to add this file.

<br />

1. In the *Your apps* card of your settings \>
   [*Project settings*](https://console.firebase.google.com/project/_/settings/general),
   select the bundle ID of the app for which you need a config file.

2. Click **Download GoogleService-Info.plist** to obtain your Firebase iOS
   config file (`GoogleService-Info.plist`).

   - You can download your Firebase iOS config file again at any time from your
     settings \> *Project settings*.

   - Make sure the config file name isn't appended with additional characters,
     like `(2)`.

3. Move your config file into the root of your Xcode project. If prompted,
   select to add the config file to all targets.

If you have multiple bundle IDs in your project, you must associate each bundle
ID with a registered app in the Firebase console so that each app can have
its own `GoogleService-Info.plist` file.
| **Note:** The Firebase config file contains unique, but non-secret identifiers for your project.   
| Visit [Understand Firebase Projects](https://firebase.google.com/docs/projects/learn-more#config-files-objects) to learn more about this config file.

<br />

<br />

### **Step 2:** Add the Firebase SDK for Analytics to your app

1. Add the dependency for the Firebase SDK for Google Analytics to your
   Podfile:

       pod 'FirebaseAnalytics'

2. Run `pod install`, then open the created `.xcworkspace` file.

3. Import the `FirebaseCore` module in your `UIApplicationDelegate`, as well as any other [Firebase modules](https://firebase.google.com/docs/ios/setup#available-pods) your app delegate uses. For example, to use Cloud Firestore and Authentication:  

   #### SwiftUI

   ```swift
   import SwiftUI
   import FirebaseCore
   import FirebaseFirestore
   import FirebaseAuth
   // ...
         
   ```

   #### Swift

   ```swift
   import FirebaseCore
   import FirebaseFirestore
   import FirebaseAuth
   // ...
         
   ```

   #### Objective-C

   ```objective-c
   @import FirebaseCore;
   @import FirebaseFirestore;
   @import FirebaseAuth;
   // ...
         
   ```
4. Configure a [`FirebaseApp`](https://firebase.google.com/docs/reference/swift/firebasecore/api/reference/Classes/FirebaseApp) shared instance in your app delegate's `application(_:didFinishLaunchingWithOptions:)` method:  

   #### SwiftUI

   ```swift
   // Use Firebase library to configure APIs
   FirebaseApp.configure()
   ```

   #### Swift

   ```swift
   // Use Firebase library to configure APIs
   FirebaseApp.configure()
   ```

   #### Objective-C

   ```objective-c
   // Use Firebase library to configure APIs
   [FIRApp configure];
   ```
5. If you're using SwiftUI, you must create an application delegate and attach it to your `App` struct via `UIApplicationDelegateAdaptor` or `NSApplicationDelegateAdaptor`. You must also disable app delegate swizzling. For more information, see the [SwiftUI instructions](https://firebase.google.com/docs/ios/learn-more#swiftui).  

   #### SwiftUI

   ```swift
   @main
   struct YourApp: App {
     // register app delegate for Firebase setup
     @UIApplicationDelegateAdaptor(AppDelegate.self) var delegate

     var body: some Scene {
       WindowGroup {
         NavigationView {
           ContentView()
         }
       }
     }
   }
         
   ```

| If you're tracking in-app purchases, you must
| initialize your transaction observer in
| `application:didFinishLaunchingWithOptions:` before initializing
| Firebase, or your observer may not receive all purchase notifications.
| See Apple's
| [In-App Purchase Best Practices](https://developer.apple.com/library/content/technotes/tn2387/_index.html)
| for more information.

## Implement custom event logging

This section shows an example of how to [implement custom event
logging](https://firebase.google.com/docs/analytics/events) in your app. This specific example is for the
custom event `ecommerce_purchase` which is a helpful event to log for
AdMob-linked apps, especially for calculating
and
.

<br />

Why is `ecommerce_purchase` important for
ARPU and ARPPU?

<br />

A key metric for your app is [revenue by
user](https://support.google.com/firebase/answer/6317517#revenue),
which can be further segmented into
and
. These two metrics
display in the *User metrics* card of your AdMob account and in the
*Analytics* dashboard of the Firebase console. Revenue, though, isn't
directly measured; instead, it's the sum of your
[estimated AdMob earnings](https://support.google.com/admob/answer/6147072)
and the following two analytics event values:

- [**`in_app_purchase`**](https://support.google.com/firebase/answer/6317485): when a user completes an in-app purchase that is processed by the App Store on iTunes, like an initial subscription, unlocking premium services, or buying in-game items

<!-- -->

- [**`ecommerce_purchase`**](https://support.google.com/firebase/answer/6317499): when a user completes a purchase, like online shopping, buying coupons or discount items, or buying movie tickets

Without any additional code in your app, the Mobile Ads SDK
automatically collects analytics data for `in_app_purchase` events. However, if
you want to *also* include `ecommerce_purchase` event data in the revenue
calculation, you'll need to implement custom logging via the Firebase SDK for
Google Analytics.

<br />

<br />

Here's how to implement custom event logging in your app:

1. Make sure that you've completed the [Get started with
   Google Analytics](https://firebase.google.com/docs/admob/analytics-and-firebase#get-started-analytics) section of this page,
   which includes configuring your app to use Firebase, adding the
   Firebase SDK for Google Analytics, and initializing the SDK.

2. Log an `ecommerce_purchase` event
   ([Swift](https://firebase.google.com/docs/reference/swift/firebaseanalytics/api/reference/Constants#analyticseventecommercepurchase)
   \|
   [Obj-C](https://firebase.google.com/docs/reference/ios/firebaseanalytics/api/reference/Constants#/c:FIREventNames.h@kFIREventEcommercePurchase)).
   Here's an example:

   ### Swift

   ```swift
   Analytics.logEvent(AnalyticsEventPurchase, parameters: [
     AnalyticsParameterCoupon: "SummerPromo",
     AnalyticsParameterCurrency: "JPY",
     AnalyticsParameterValue: 10000,
     AnalyticsParameterShipping: 500,
     AnalyticsParameterTransactionID: "192803301",
   ])
   ```

   ### Objective-C

   ```objective-c
   [FIRAnalytics logEventWithName:kFIREventPurchase
                       parameters:@{
     kFIRParameterCoupon: @"SummerPromo",
     kFIRParameterCurrency: @"JPY",
     kFIRParameterValue: @10000,
     kFIRParameterShipping: @500,
     kFIRParameterTransactionID: @"192803301",
   }];
   ```

To learn more about logging custom events in your app, visit the [Analytics
documentation](https://firebase.google.com/docs/analytics/events).

## Use other Firebase products in your app

After you add the Firebase SDK for Google Analytics, you can also start
using other Firebase products, like Firebase Remote Config and
Firebase A/B Testing.

- [Remote Config](https://firebase.google.com/docs/remote-config) enables you to change the behavior
  and appearance of your app without publishing an app update, at no cost, for
  unlimited daily active users.

- [A/B Testing](https://firebase.google.com/docs/ab-testing) gives you the power to test changes to
  your app's UI, features, or engagement campaigns to learn if they make an
  impact on your key metrics (like revenue and retention) before rolling the
  changes out widely.

### Optimize ad monetization for your app

Try out different ad formats or configurations with a small subset of users, and
then make data driven decisions about implementing the ad for all your users. To
learn more, check out the following tutorials:

- *Test new ad format adoption*
  ([overview](https://firebase.google.com/docs/tutorials/admob_test-new-ad-format-adoption_solution-overview) \|
  [implementation](https://firebase.google.com/docs/tutorials/admob_test-new-ad-format-adoption_implementation-guide)).

- *Optimize ad frequency*
  ([overview](https://firebase.google.com/docs/tutorials/optimize-ad-frequency/solution-overview) \|
  [implementation](https://firebase.google.com/docs/tutorials/optimize-ad-frequency)).