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Flutter Quickstart

From zero to your first event in about five minutes, for Flutter apps on iOS, Android, web, macOS, Windows, and Linux.

1. Get an API key​

Sign up at app.mostlygoodmetrics.com and create a project. Copy the API key from the project's settings — it looks like mgm_proj_xxxx.

2. Install​

flutter pub add mostly_good_metrics_flutter

Or add it to your pubspec.yaml:

dependencies:
  mostly_good_metrics_flutter: ^0.8.0

Requires Flutter 3.10+ and Dart 3.0+.

3. Initialize​

Configure the SDK before runApp:

import 'package:flutter/material.dart';
import 'package:mostly_good_metrics_flutter/mostly_good_metrics_flutter.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await MostlyGoodMetrics.configure(
    MGMConfiguration(apiKey: 'mgm_proj_your_api_key'),
  );

  runApp(const MyApp());
}

4. Track your first event​

MostlyGoodMetrics.track('first_event', properties: {
  'source': 'quickstart',
});

Events are persisted locally, batched, and flushed automatically (every 30 seconds and when the app backgrounds). The SDK also tracks $app_installed and $app_opened for you on launch.

5. Verify in the dashboard​

Open your project at app.mostlygoodmetrics.com — first_event (and the automatic $app_opened) should appear within a few seconds of the SDK flushing. You can force it with await MostlyGoodMetrics.flush().

If nothing shows up:

  • Enable debug logging: MGMConfiguration(apiKey: '...', enableDebugLogging: kDebugMode) and watch the console
  • Check that the API key matches the project you're looking at

Next steps​