Expo (React Native) vs Flutter Comparison

// Expo — OTA JS update via EAS Update, without waiting for store review (TypeScript)

// app.config.ts — update channel definition
import { ExpoConfig, ConfigContext } from "expo/config";

export default ({ config }: ConfigContext): ExpoConfig => ({
  ...config,
  name: "MyApp",
  slug: "my-app",
  version: "1.0.0",
  runtimeVersion: { policy: "appVersion" },
  updates: { url: "https://u.expo.dev/your-project-id" },
});

// Terminal: build for production and submit to the store
// eas build --platform all --profile production
// eas submit --platform all

// Bug found — ship a JS/asset fix without touching the native build
// eas update --branch production --message "Fix: login crash on cold start"

// Performance monitoring in production with EAS Observe (GA: August 20, 2026)
// -> https://docs.expo.dev/eas/observe/introduction/
// Requires a separate native library; doesn't work in Expo Go — a development or
// production build is required:
// npx expo install expo-observe
// Wrap the root layout in <ObserveRoot> and call markInteractive() once the app is ready.
// Metrics: cold/warm start, first render, time to interactive, bundle
// load, and EAS Update download time. JS error logging is in preview.

// Flutter 3.47 — migrating to the standalone material_ui package (Dart)

// pubspec.yaml — add the new standalone package
// dependencies:
//   material_ui: ^1.0.0
//   cupertino_ui: ^1.0.0

// Terminal: automatic migration from the old in-SDK widgets to the new package
// $ dart fix --apply --code=migrate_design_widgets

// main.dart — import from the new package (old: package:flutter/material.dart)
import 'package:material_ui/material_ui.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Profil Kartı',
      home: Scaffold(
        appBar: AppBar(title: const Text('Profil')),
        body: const Center(child: Text('Merhaba, Flutter 3.47')),
      ),
    );
  }
}

// Note: Flutter has no official equivalent of "eas update" —
// to ship this change to users you need to cut a new build and
// take it through store review.