Cross-platform appsthat feel native.Built in Flutter.

// lib/features/checkout/checkout_screen.dart
class CheckoutScreen extends ConsumerWidget {
  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final cart = ref.watch(cartProvider);
    final payment = ref.watch(paymentProvider);

    return Scaffold(
      body: CartSummary(items: cart.items),
      bottomSheet: PayButton(
        total: cart.total,
        onPay: () => ref.read(paymentProvider.notifier)
            .processPayment(cart),
        loading: payment.isProcessing,
      ),
    );
  }
}
// Riverpod. Clean state. Both platforms. One codebase.