---
title: "Unlock Easier React Native Migration for Brownfield iOS Apps"
description: "Discover how the RCTRootViewFactory API simplifies React Native integration for existing iOS apps, making brownfield projects smoother than ever."
url: https://www.callstack.com/newsletters/unlock-easier-react-native-migration-for-brownfield-ios-apps
updated: 2026-10-24T07:18:05.587Z
---

# Unlock Easier React Native Migration for Brownfield iOS Apps

Discover how the RCTRootViewFactory API simplifies React Native integration for existing iOS apps, making brownfield projects smoother than ever.

_By Callstack @ Callstack · Published 2024-10-03_

This edition focuses on migrating brownfield apps to React Native and explores how 'RCTRootViewFactory' can make the transition smoother than ever.

## Brownfield Integration with React Native

Migration to React Native isn't always straightforward, especially for brownfield projects. If you're integrating React Native into an existing iOS app, there's a key piece to simplify the experience: React Native's core 'RCTRootViewFactory' API.

## Simplifying the Migration Process

The complexity of creating root views in brownfield apps, especially with React Native's New Architecture, has been a pain point for many. Now `RCTRootViewFactory` streamlines the process. It handles key variables such as:

- Whether the New Architecture is enabled
- Feature flags that impact app behavior
- Proper initialization of React Native internals

💡 This eliminates the need for extensive code refactoring and simplifies integration, setting your app up for scalable growth with the latest version of React Native.

## Using RCTRootViewFactory in Your Project

We covered the entire process of brownfield integration and how to use RCTRootViewFactory in our blog. From enabling the New Architecture to creating a new SwiftUI view that contains React Native, you'll find a breakdown of everything you need to make it work seamlessly.

[**Read the article**](https://www.callstack.com/blog/simplify-your-ios-brownfield-integration-with-rootviewfactory)

Integrating React Native into existing apps doesn't have to be daunting. With the right tools, even complex brownfield projects can be simplified. Happy coding! 🙌