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Manage Firebase installations

The Firebase installations service (FIS) provides a Firebase installation ID (FID) for each installed instance of a Firebase app. The Firebase installation ID is used internally by Firebase services such as In-App Messaging or Remote Config without requiring developers to interact directly with the FIS API. However, there are cases where app developers might want to directly call the FIS API, such as:

  • To delete an app instance and all associated data and statistics for "data wipeout" purposes.
  • To retrieve identifiers (Firebase installation IDs) in order to target specific app installations.

To get started with directly calling the FIS API, add the SDK to your app.

Add the Firebase installations SDK to your app


  1. Add the dependency for Firebase installations to your Podfile:
    pod 'Firebase/Installations'
  2. Run pod install and open the created .xcworkspace file.
  3. Import the Firebase module in your UIApplicationDelegate:


    import Firebase


    @import Firebase;
  4. Configure a FirebaseApp shared instance, typically in your app's application:didFinishLaunchingWithOptions: method:


    // Use Firebase library to configure APIs


    // Use Firebase library to configure APIs
    [FIRApp configure];


Add the dependency for the Firebase installations Android SDK to your module (app-level) Gradle file (usually app/build.gradle):

implementation ''


Depending on how your web application is hosted, your configuration may be handled automatically or you may need to update your Firebase configuration object.

For example, if your dependencies are added in index.html, add the dependency in the <head> element:

<script src="/__/firebase/7.17.1/firebase-installations.js"></script>

Delete a Firebase installation and associated data

Data associated with a Firebase installation is generally not personally identifying. Still, it can be helpful (and in some cases legally required) to give users an option to manage and delete this data. The deletion procedures described below result in a GDPR-compliant wipeout of all data recorded for a particular Firebase installation.

Firebase installation IDs are different for every installation of every application; different applications on the same device have different Firebase installation IDs. Firebase installation IDs identify app installations and data associated with those app installations, and allow the deletion of the data associated with individual app installations across all Firebase services.

When you deleta an installation ID, the associated data is removed from live and backup systems of all Firebase services within 180 days.

Unless you disable all FID-generating services in your app, FIS creates a new ID within a few days. Firebase considers the newly-created ID to be a new Firebase installation, and doesn't associate it with the previous ID or data in any way.

Delete an FID with a client API call

To delete FIDs generated by Firebase services, call the appropriate method from the Firebase installations SDK:


func delete(completion: @escaping (Error?) -> Void)


- (void)deleteWithCompletion:(nonnull void (^)(NSError *_Nullable))completion;





Delete an FID with a server API call

To delete an FID with a server API call, add the Firebase Admin SDK to your server, if you haven't already.

Once the SDK is added, delete FIDs through a call to the deletion function in your language of choice (note: though these methods reflect Instance ID naming, they actually delete the FID when called with any current Firebase SDK).


// An FID sent from a client service SDK
const idToDelete = 'eyJhbGciOiJFUzI1N_iIs5';



// An FID sent from a client service SDK
String idToDelete = "eyJhbGciOiJFUzI1N_iIs5";



  from firebase_admin import instance_id

  # An FID sent from a client service SDK
  id_to_delete = 'eyJhbGciOiJFUzI1N_iIs5'



client, err := app.InstanceId(ctx)
if err != nil {
  log.Fatalln("error initializing client", err)

iidToDelete := "eyJhbGciOiJFUzI1N_iIs5"
if err := client.DeleteInstanceId(ctx, iidToDelete); err != nil {
  log.Fatalln("error deleting FID", err)

When you delete an Firebase installation ID with a server API call, Firebase services delete the associated data, stop accepting new data for that ID over the course of 1-2 days, and then notify the client app that the ID was deleted. Until Firebase notifies the client app, some of the app's services might still target the ID—for example, an app instance might continue to receive FCM notifications for a few hours.

If you want to delete the current Firebase installation ID and immediately use Firebase services with a new, unrelated ID, use the client API to handle the deletion.

Retrieve app instance identifers

If you have a requirement to identify particular installations of your app, you can do so by retrieving the Firebase installation ID. For example, to perform testing during Firebase In-App Messaging development, you can identify and target the correct test device using its Firebase installation ID.

To retrieve a Firebase installation ID:


Installations.installations().installationID { (id, error) in
  if let error = error {
    print("Error fetching id: \(error)")
  guard let id = id else { return }
  print("Installation ID: \(id)")


[[FIRInstallations installations] installationIDWithCompletion:^(NSString *identifier, NSError *error) {
  if (error != nil) {
    NSLog(@"Error fetching Installation ID %@", error);
  NSLog(@"Installation ID: %@", identifier);


        .addOnCompleteListener(new OnCompleteListener<String>() {
    public void onComplete(@NonNull Task<String> task) {
        if (task.isSuccessful()) {
            Log.d("Installations", "Installation ID: " + task.getResult());
        } else {
            Log.e("Installations", "Unable to get Installation ID");


const installationId = await firebase.installations().getId();

Firebase installations and Instance ID

For data wipeout as well as internal use, FIS is backward-compatible with the legacy identifier Firebase Instance ID. Deleting an IID is an alternative method of performing data wipeout with these Firebase SDKs:

  • iOS 6.14.0 and lower
  • Android SDKs earlier than February 27, 2020

If you want to perform data wipeout with more recent iOS and Android SDKs, updating your code to use FIS is recommended but not required.

If your app currently uses the Instance ID SDK via an indirect dependency to retrieve IDs, you can either update your code to use Firebase installations instead or, alternatively, you could update your application to add a direct dependency on the Instance ID SDK.