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flutter: Add note to app start integration #13479

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Apr 30, 2025
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flutter: Add note to app start integration #13479

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16 changes: 16 additions & 0 deletions includes/dart-integrations/app-start-instrumentation.mdx
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Expand Up @@ -46,6 +46,22 @@ Before starting, ensure:

This instrumentation is automatically enabled. There is no need for further configuration.

<Alert>

App start instrumentation is designed specifically for pure Flutter applications and requires UI rendering to function properly. If you're using Flutter in an add-to-app integration scenario, the app start metrics will not provide accurate measurements. In such cases, we recommend disabling this instrumentation.

```dart
// ignore: implementation_imports
import 'package:sentry_flutter/src/integrations/native_app_start_integration.dart';

// in SentryFlutter.init
final integration = options.integrations.firstWhere(
(integration) => integration is NativeAppStartIntegration);
options.removeIntegration(integration);
```

</Alert>

## Verify

### 1. Launch Your App:
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