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Articles

Articles for developers, by developers

Technical insights from building React and React Native production-grade apps, contributing to core libraries, and solving complex cross-platform challenges.

Open Source
5/13/2025

React Native Legal: Zero-Config OSS License Screens for Your App

Open-source libraries power all React Native apps, but many devs overlook the need to acknowledge them inside the app itself. This post introduces React Native Legal, a zero-config tool that generates license metadata and adds a native-style license screen across iOS, Android, tvOS, and AndroidTV.

Michał Pierzchala

Principal Engineer

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Brownfield
4/28/2025

Powering Native Apps with React Native Brownfield

This article introduces the brownfield approach, explaining how it allows you to bring React Native into existing native apps without starting from scratch. It then covers how our library, React Native Brownfield, simplifies this process by embedding React Native screens into native apps, and provides an overview of its structure and key features.

Burak Guner

Software Developer

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Performance
4/11/2025

Profiling React Native Internals with Tracy for Peak Performance

Profiling React Native's internals can uncover bottlenecks and provide deep insights into native behavior. This guide walks through using the Tracy profiler to instrument React Native code, collect performance metrics, and identify optimization opportunities across iOS and Android.

Mariusz Pasiński

Software Engineer

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Performance
3/20/2025

Why Knowing Your App’s Bundle Contents Matters for React Native Performance

Slow app startup times can frustrate users, especially on older devices or slower networks. Expo Atlas helps you peek inside your React Native app bundle to identify large dependencies and optimize performance, even if you're not using Expo.

Szymon Chmal

Software Developer

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Enterprise
3/14/2025

We’re Building a New React Native Framework

Building large React Native apps can be challenging, with slow build times, complex integrations, and mixed tech stacks. We're developing a new framework designed for enterprise apps that optimizes build reuse, CI speed, and cloud integration while staying flexible and self-hosted.

Michał Pierzchala

Principal Engineer

@

Callstack

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AI
3/11/2025

Local LLMs on Mobile Are a Gimmick—For Now

Running large language models directly on mobile devices is currently limited by model size, format compatibility, and performance trade-offs. However, tools like MLC are emerging to simplify the process and pave the way for a future where everyone has their own AI assistant in their pocket.

Kewin Wereszczyński

Software Engineer

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Super Apps
2/27/2025

Re.Pack 5: Mobile Microfrontends, 5x Faster, Less Configuration

We are thrilled to announce the release of Re.Pack 5, our biggest update ever. This milestone release represents a complete transformation of our build tool for React Native applications, bringing unprecedented performance improvements through Rspack, proper microfrontends support through Module Federation 2, simplified configuration and more!

Jakub Romańczyk

Software Engineer

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iOS
2/27/2025

Exposing SwiftUI Views to React Native: An Integration Guide

SwiftUI is increasingly used in iOS apps, but integrating it with React Native can be tricky. This guide walks through how to expose SwiftUI views like SubscriptionStoreView to React Native components, allowing you to build features like paywalls with just a few lines of declarative SwiftUI code.

Oskar Kwaśniewski

Software Developer

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Desktop
2/20/2025

How to Build a Chrome Extension: A Step-by-Step Guide

Building a Chrome extension doesn't have to be complicated. This step-by-step guide walks through creating a Pomodoro timer extension, complete with site blocking, screenshots, a settings page, and even a side panel with an AI-powered motivational assistant.

Mykola Stanislavchuk

Software Engineer

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Developer Experience
2/12/2025

How to Easily Create Native Libraries With Nitro and Turbo Modules

Creating custom native libraries in React Native used to be complex, with tricky bridging between JavaScript and native code. But now, Nitro Modules make it easy to write performant native code in Swift, Kotlin, and C++ with minimal boilerplate. This article explores how Nitro Modules improve on the legacy Native Modules API and the newer Turbo Modules.

Burak Guner

Software Developer

@

Callstack

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Performance
2/11/2025

How to Profile Native Code in React Native Using Tracy

Profiling code is essential for uncovering performance bottlenecks. This guide walks through how to use Tracy profiler to measure execution times, identify hotspots, and optimize a React Native image processing module for faster speeds.

Mariusz Pasiński

Software Engineer

@

Callstack

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Article
5/13/2025

React Native Legal: Zero-Config OSS License Screens for Your App

Add license acknowledgments to your React Native app with ease using React Native Legal—a zero-config tool for OSS compliance across iOS, Android, tvOS, and AndroidTV platforms.
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Article
4/28/2025

Powering Native Apps with React Native Brownfield

Discover how React Native Brownfield makes it easier to blend React Native features into native apps without full rewrites or heavy migrations.
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Article
4/11/2025

Profiling React Native Internals with Tracy for Peak Performance

Learn how to profile React Native internals with Tracy to uncover bottlenecks, optimize performance, and gain deep insights into your app’s native behavior.
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Article
3/20/2025

Why Knowing Your App’s Bundle Contents Matters for React Native Performance

Learn why your React Native app’s bundle size matters & how tools like Expo Atlas help you optimize performance, reduce app startup time & improve dependency management.
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Article
3/14/2025

We’re Building a New React Native Framework

Meet a React Native framework designed for enterprise apps, optimizing build reuse, CI speed & cloud integration while staying flexible and self-hosted.
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Article
3/11/2025

Local LLMs on Mobile Are a Gimmick—For Now

Can local LLMs replace cloud-based AI? We analyze performance, limitations, and the future of on-device AI models in 2025.
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Webinar
Webinar
4/28/2025

Master JavaScript Performance in React Native (Part 2)

Learn to fix JS performance issues in React Native—from debounce bugs to Redux selectors—in this hands-on webinar with real code examples.
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Meetup
Meetup
4/24/2025

React Universe Meetup: San Francisco

Missed the React Universe Meetup SF? Watch the livestream recording soon—talks on RN performance, optimization, and build-free workflows await.
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Talk
Talk
4/16/2025

Bring Your Favorite Language to React Native

Learn how to integrate native libraries in React Native, without TurboModules. Robert shares a practical approach using WebAssembly and introduces PolyGen.
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Podcast
4/9/2025

Exploring TanStack Ecosystem: From React Query to TanStack Start

Tanner Linsley breaks down TanStack’s evolution—from React Query to Start—and why client-first React apps still matter in today’s full-stack landscape.
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Podcast
3/26/2025

How Definitely Typed Changed TypeScript Forever

Discover the story behind Definitely Typed with its creator, Boris Yankov, and learn how it became essential for type-safe JavaScript in the TypeScript ecosystem.
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Podcast
3/5/2025

Multiple TV Platforms, One Codebase: React Native TV App Development

Is TV app development is the same as mobile, but bigger? It's not—and in this episode, Michael Khirallah (DIRECTV) and Chris Trag (Amazon) will explain why.