firebase_crashlytics plugin

A Flutter plugin to use the Firebase Crashlytics Service.

pub package

For Flutter plugins for other Firebase products, see

Note: This plugin is still under development, and some APIs might not be available yet. Feedback and Pull Requests are most welcome!


Import the firebase_crashlytics plugin

To use the firebase_crashlytics plugin, follow the plugin installation instructions.

Android integration

Enable the Google services by configuring the Gradle scripts as such.

  1. Add Fabric repository to the [project]/android/build.gradle file.
repositories {
  // Additional repository for fabric resources
  maven {
    url ''
  1. Add the classpaths to the [project]/android/build.gradle file.
dependencies {
  // Example existing classpath
  classpath ''
  // Add the google services classpath
  classpath ''
  // Add fabric classpath
  classpath ''
  1. Add the apply plugins to the [project]/android/app/build.gradle file.
apply plugin: 'io.fabric'
apply plugin: ''

Note: If this section is not completed you will get an error like this:

Default FirebaseApp is not initialized in this process [package name].
Make sure to call FirebaseApp.initializeApp(Context) first.

Note: When you are debugging on Android, use a device or AVD with Google Play services. Otherwise you will not be able to use Firebase Crashlytics.

iOS Integration

Add the Crashlytics run scripts

  1. From Xcode select Runner from the project navigation.
  2. Select the Build Phases tab.
  3. Click + Add a new build phase, and select New Run Script Phase.
  4. Add ${PODS_ROOT}/Fabric/run to the Type a script... text box.
  5. If on Xcode 10 Add your app's built Info.plist location to the Build Phase's Input Files field. Eg: $(BUILT_PRODUCTS_DIR)/$(INFOPLIST_PATH)

Use the plugin

Add the following imports to your Dart code:

import 'package:firebase_crashlytics/firebase_crashlytics.dart';

Setup Crashlytics:

void main() {
  // Set `enableInDevMode` to true to see reports while in debug mode
  // This is only to be used for confirming that reports are being
  // submitted as expected. It is not intended to be used for everyday
  // development.
  Crashlytics.instance.enableInDevMode = true;

  // Pass all uncaught errors to Crashlytics.
  FlutterError.onError = (FlutterErrorDetails details) {


If an error is caught, you should see the following messages in your logs:

flutter: Error caught by Crashlytics plugin:
flutter: Error reported to Crashlytics.

Note: It may take awhile (up to 24 hours) before you will be able to see the logs appear in your Firebase console.


See the example application source for a complete sample app using the Firebase Crashlytics.

Issues and feedback

Please file issues to send feedback or report a bug. Thank you!