Desktop App Development

Build high-performance desktop apps for macOS and Windows

Native-feeling desktop apps for Windows and macOS that look great, perform reliably, and ship from a single codebase, backed by the same tech powering tools from Microsoft and Meta. Agents move the work forward. Experts make the calls.

100+
Enterprise projects delivered
React Foundation Founding Member
300+ commits to React Native
3x
Delivery acceleration
80%
Effort executed by agents
Industry runs on our tooling
50M+
OSS downloads / month
5
Platforms under one React Native codebase

Expensify uses agent-device. Mobile bug evidence and profiling are part of its documented usage story.

What you get

A desktop app that feels native, because it is.

  • Desktop-ready interface

    Keyboard-first workflows, native window behavior, and high-density layouts, optimized for real desktop usage.

  • Full OS integration

    File access, notifications, deep linking, clipboard, menu bars, and other system-level features. It behaves like a true desktop app, because it is one.

  • One codebase, desktop included

    Electron with React for most products, react-native-macos and react-native-windows when you need deeper native integration. Logic, design systems, and workflows stay shared with mobile and web.

  • Built for AI features

    Assistants, on-device models, and agent integrations like MCP. Desktop unlocks local compute, file access, and OS-level hooks that browsers can't match, and we build apps designed to host AI.

  • Ship at AI speed

    Agents scaffold, refactor, and test in parallel under senior review, so work keeps moving between sessions. You get more shipped per sprint without lowering the engineering bar.

  • Reliable performance at scale

    Tuned render paths, startup time, and memory usage. Built to stay smooth with large data sets and complex UIs.

  • Automated delivery

    Installers, auto-updates, crash reporting, and platform-specific packaging, including code signing and notarization. Ready for release on macOS and Windows.

  • Owned by your team

    Built with handoff in mind: clear structure, documentation, and naming conventions so your team can take full ownership.

Desktop App Development

Build or scale your desktop app

We deliver cross-platform desktop apps without compromising performance or user experience. Let's scope the build.

How we work together

Take one product from scope to scale.

  • Extend your team

    Our senior engineers join your team to ship features, guide technical decisions, and strengthen delivery.

    • Your roadmap and workflow
    • Expertise shared as we work
    • Flexible timezone coverage
  • Deliver a project

    We take agreed work from technical planning to release, with clear responsibilities and progress you can see.

    • 3 Callstack engineers ship like 6
    • Impact visible before sprint two
    • End-to-end delivery
  • Solve specific challenge

    We address a performance, migration, or infrastructure challenge, or run training around your team’s needs.

    • Focused reviews or implementation
    • Knowledge your team keeps
    • Outcomes guaranteed with contract

Case studies

What shipping at AI speed looks like.

Desktop App Development

Build or scale your desktop app

We deliver cross-platform desktop apps without compromising performance or user experience. Let's scope the build.

We had been struggling with React Native application performance until we met Callstack.

Huỳnh Chí HùngAssociate Director / MOMO

Start with a product scoping call

We’ll connect you with the right expert within 24 hours.

Still have questions?

Let’s find the right path for your product.

Whether you’re planning new work or unblocking an existing product, we’ll help you choose the right path forward.

Can I build a truly native-feeling desktop app with React Native?

Yes. Whether we build with Electron or react-native-macos and react-native-windows, your app gets native window behavior, OS integration, and desktop-grade UX. The same approaches power Visual Studio Code, Slack, Messenger, and Microsoft Teams.

Will my desktop app work across both macOS and Windows?

Yes. We use platform-specific extensions where needed, but most of your business logic and UI can be shared across both.

Can I reuse code from my mobile or web app?

Absolutely. We specialize in setting up shared codebases across mobile, web, and desktop, maximizing reuse while respecting platform boundaries.

Do you support integration with existing native code?

Yes. We handle brownfield setups, allowing you to incrementally adopt React Native within an existing desktop codebase.

What about desktop-specific UX like keyboard shortcuts or window behavior?

We handle all the details, from focus management to multi-window handling, so your app behaves exactly like users expect.

Can you help with packaging and store deployment?

Yes. We support building for the Microsoft Store and Mac App Store, including code signing, notarization, and installer setup.

Do you build desktop apps with Electron or React Native?

Electron with React in most cases: it's the fastest path to a production desktop app, with the most mature ecosystem, powering VS Code and Slack. When you need a smaller footprint or deeper native UI, we work with react-native-macos and react-native-windows, the stack behind parts of Office and Windows 11.

Can you build AI features into our desktop app?

Yes. We integrate assistants, on-device models, and agent protocols like MCP directly into desktop apps. Desktop gives AI products local compute, file access, and system-level integration that web apps can't match.

How do you use AI to ship faster without lowering quality?

Agents scaffold, refactor, and test in parallel under senior review, so work keeps moving between sessions. You get more shipped per sprint without lowering the engineering bar.

Open Source

Build with our open-source tools.

We open-source the tools behind our delivery model.
Use them, fork them, or let us run them for you.

React Native Paper

Material Design for React Native (Android & iOS)

2M downloads/mo

React Navigation

Routing and navigation for your React Native apps

218.4K downloads/mo

React Native Pager View

React Native wrapper for the Android ViewPager and iOS UIPageViewController

5.5M downloads/mo

React Native Slider

React Native component exposing Slider from iOS and SeekBar from Android

6M downloads/mo

React Native Bottom Tabs

Native Bottom Tabs for React Native

408.8K downloads/mo

Insights

Worth your time, by engineers.

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Aug 31Article

Working With the React Native Super App Showcase Repository

This article explains how the Super App Showcase structures a React Native super app around a Host Shell, federated mini apps, and a Shared SDK. It covers how Re.Pack and Module Federation load feature bundles at runtime while the host keeps native code and shared singletons consistent. The cold-start sequence shows how these parts work together, while the sections that follow cover module setup, shared state, real-time data, and UI performance. The final section focuses on production requirements for remote bundle discovery and version compatibility.

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Jun 17Article

Why Banking App Modernization Stalls Before It Ships

This article looks at why banking app modernization often slows down after the strategy is set. We cover the delivery problems that show up as apps grow, from release coordination and testing to observability and cross-team ownership. We also explain why architecture alone does not solve them and what a shared platform function can do to help banks ship faster without losing control.

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Dec 8Article

Mobile vs. VR: Key Differences in Features, UI, and UX

This article highlights the core shifts developers face when moving from mobile screens to VR windows. It explains how windowing, typography, spacing, accessibility, and interaction patterns behave differently in a headset, and shows how to apply those changes in React Native. By understanding these differences, you can design 2D UIs that feel natural, readable, and comfortable on Meta Quest.

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Nov 6Article

What You Can Build With React Native on Meta Quest

This article offers inspiration for Meta's $1.5M Developer Competition by outlining what you can build with React Native on Quest. It details app possibilities like meditation, interactive games, and MR experiences, encouraging developers to use VR-specific features.

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Oct 8Article

Learn Once, Write for VR: A React Native Showcase for Meta's HorizonOS

This article details the successful creation of a React Native app for Meta's HorizonOS. It proves the framework is a viable solution for building performant VR experiences by reusing code and leveraging familiar libraries. The resulting showcase app includes camera integration, audio playback, and smooth navigation.

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Oct 3Article

Cross-Platform TV Apps With React Native for tvOS, Android TV, and Tizen

While widely known for mobile, React Native's flexible architecture makes it a proven and practical solution for building TV applications. This article explores how "out-of-tree" platforms allow developers to escape the fragmented world of traditional TV SDKs (tvOS, Android TV, webOS) and unify their workflow. Whether your team is new to React Native or already has a mobile codebase, you'll discover the benefits of code sharing, improved developer experience, and how major companies are using it to efficiently deliver production-ready apps to the living room screen.

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Apr 12Article

Working With the Super-App-Showcase Repository

The super-app-showcase repository is a case study demonstrating how to structure a super app using Re.Pack and Module Federation. We explore its monorepo setup, catalog server for version compatibility, shared state management, and shell app for streamlined testing and integration.

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Apr 11Article

Why Your Business Needs a Super App

Super apps are gaining popularity worldwide as a way to consolidate many services into one mobile platform. This guide explores what super apps are, how they work, and the key benefits they offer businesses - from improving user engagement to reducing development costs.

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Sep 8Article

Why Use React Native for Windows?

React Native Windows lets you extend your React Native app to desktop with native Windows features. It provides a familiar React Native developer experience while invoking UWP technologies behind the scenes.

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Apr 10Article

Super App Development

Super apps combine multiple services into a single platform. This guide walks through how to build super apps from scratch or migrate existing apps using Re.Pack, an open-source toolkit for React Native. It also covers how super app development can help scale teams and processes while delivering real business benefits.

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Dec 28Article

Simple Chat App With React Native - Part II

Connecting a React Native chat app frontend to a backend involves setting up Socket.IO for real-time communication, using Redux for state management, and creating actions and reducers to handle sending and receiving messages. This guide walks through the key steps, from connecting to the server to displaying conversations and messages in the UI.

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Oct 23Article

Simple Chat App With React Native - Part I

Building a chat app with React Native doesn't have to be complicated. In this two-part series, we walk through how to create the backend using Hapi.js for the server, MongoDB for the database, and Socket.IO for real-time communication. This post focuses on setting up the core infrastructure and defining routes to create conversations and messages.

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Jun 26Article

Is PWA Development the Best Mobile Solution for Your Business?

Progressive Web Apps (PWAs) offer a fast way to deliver web apps with mobile-like features, without the full complexity of native apps. This guide explores the key capabilities, benefits, and tradeoffs of PWAs compared to native iOS and Android apps for different use cases.

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Feb 15Article

Is This Possible With React Native?

React Native can handle complex challenges like integrating with external hardware, building real-time music players, and working offline. This article shares case studies of how Callstack helped clients build apps that push the boundaries of what's possible with React Native.

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Jan 12Article

How to Build Universal Lens Protocol Social Apps With React Native

Building a universal social app on Lens Protocol is easier than you think. This guide walks through creating a cross-platform React Native app with a feed and profiles powered by the decentralized Lens social graph.

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Apr 12Article

How to Optimize Development Efficiency When You’re Building a Super App

Building a super app involves careful planning to optimize development efficiency. This guide shares practical tips for preparing your app for third-party contributions and fostering smooth collaboration between teams working on different modules.

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Sep 15Article

How to Build a Desktop App With React Native for Windows

Building desktop apps with React Native for Windows is now easier than ever. This step-by-step guide walks through setting up a new project, developing features, testing, debugging, and publishing to the Microsoft Store.

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Apr 3Article

How React Native Development Can Save Your Business in the Time of Coronavirus Pandemic

Businesses are facing new challenges due to the coronavirus pandemic. React Native cross-platform development can help quickly build online presence, launch mobile apps, and ship features faster while reducing costs. This guide walks through three common scenarios where React Native brings measurable benefits to adapt in changing times.

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Dec 28Article

Cross-Platform Web3 dApps With React Native

Building cross-platform Web3 dApps doesn't have to mean maintaining separate codebases. This guide walks through using React Native, Expo, and Web3Modal to build a dApp that works seamlessly on web, iOS, and Android from a single codebase.

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Dec 6Article

Developing a React Native TV App

React Native is making TV app development more accessible. This guide explores two approaches: using Expo for quick setup or bare React Native for more control. It shows how to add TV support to existing projects and structure apps to handle multiple platforms.

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Oct 25Article

Build Modern Web3 dApps on Ethereum With React Native and Viem

Viem and WalletConnect are powerful tools for building modern web3 dApps on Ethereum with React Native. This guide walks through how to use viem to query blockchain data and interact with wallets, showcasing its performance and developer experience advantages over traditional libraries.

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Nov 13Article

Best DX for React Native Web3 dApps With Web3Modal and Wagmi

Wagmi and Web3Modal make it easier than ever to build web3 dApps with React Native. This guide walks through setting up a new project, connecting to wallets, querying blockchain data, signing messages, and sending transactions.

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Apr 12Article

Business Landscape of Super Apps: Frequently Asked Questions

Super apps are becoming increasingly popular as a way to provide users with a seamless, all-in-one mobile experience. This FAQ answers common questions about the business aspects of super app development, including market potential, benefits and risks, and the impact on your organization.

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Sep 13Article

Business Benefits of React Native Windows

React Native Windows offers concrete business benefits for desktop app development. This guide breaks down how it enables more accurate project estimation, faster development velocity, and easier long-term maintenance compared to traditional approaches.

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Dec 3Article

Aiming for Success in the TV App Development Space With React Native

Building TV apps with React Native requires rethinking user interactions for a lean-back experience and navigating platform fragmentation. This guide shares strategies to balance code sharing with platform-specific optimizations, prioritize testing, and embrace best practices to create compelling big screen experiences.

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Feb 2Article

Amazon Fire TV Stick App in React Native

Building apps for Amazon Fire TV Stick with React Native is an adventure. We walk through how to enable adb, get an empty app running, handle remote control events, and create custom selectable components to build an RSS reader app.

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May 15Article

Add-Ons for Web Browsers With React

Building your own browser add-on can be a great way to solve specific problems or boost productivity. This guide walks through how to use React to create the UI for browser extensions, covering project setup, key components, and rendering your first view.

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Jul 21Article

A Step-By-Step Guide to Super App Development With Re.Pack 5

This hands-on guide shows how to turn two React Native applications into a minimal super app. Configure Re.Pack 5 and Module Federation, expose a mini app, register it in a host, and load it with React.lazy while handling loading and error states.

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Jul 7Podcast

What AI Changes for Paywalls and Monetization

Perttu Lähteenlahti (RevenueCat) talks about AI-generated paywalls, MCP tooling, monetization experiments, and what RevenueCat is building next across mobile and web.

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Jun 29Podcast

How Voice Agents Handle Latency, Turn-Taking, and Safety

Kræn Hansen (ElevenLabs) talks voice-agent UX, from turn-taking and safety to layered SDK design for React and React Native.

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Jan 12Podcast

Building v0 iOS and Fixing React Native Along the Way

A technical look at building v0 mobile with React Native and Expo, covering iOS-first decisions, native modules, and fixes pushed to React Native core. Featuring Fernando Rojo, Szymon Rybczak, and Oskar Kwaśniewski.

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Nov 26Podcast

Bringing React Native to VR on Meta Quest

Learn how Meta Quest uses React Native for 2D panels in 3D spaces, why AOSP matters, and how developers can bring existing RN apps to VR with minimal friction.

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Nov 25Podcast

Amazon's Vega OS: A New OS With React Native Built-In

Giovanni Laquidara (Amazon) introduces Vega OS, a new lightweight operating system with React Native built-in, designed for high-performance on low-end media devices.

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Sep 19Podcast

React Native at Scale With NFL

Discover how the NFL uses React Native, Expo, and a monorepo to ship apps across iOS, Android, web, and TV with one stack.

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May 31Podcast

Stepping Into New Dimension With React Native VisionOS

Try immersing yourself in the React Universe with React Native visionOS! Listen about the latest changes in the framework & watch a 3D app demo.

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Dec 13Podcast

React Native for TV App Development

Learn about the current state of the TV development space and the benefits and considerations of applying React Native to it.

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Dec 21Podcast

React Native for Apple Vision Pro and visionOS

In this episode, Łukasz invites Oskar and Michał to discuss their experimental journey of bringing React Native to Apple Vision Pro and visionOS.

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Sep 14Podcast

React Native Development on Windows

Explore how React Native Windows compares to Electron, its benefits for desktop apps, and practical tips for getting started or migrating from native apps.

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Feb 15Podcast

Multiplatform App Development With React Native

Even if your product is primarily for one platform, the reality of your users demanding smooth experiences and impeccable functioning on many others will hit you sooner or later. Building for mobile, web, TV, or even VR might feel like juggling a dozen balls at once—each calling for a dedicated skill set, timeline, and budget.

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Mar 5Podcast

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

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

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Nov 14Podcast

Building the Future of Mobile Web3

Do Web3 and React Native go together? Tune in to our discussion about the possibilities & challenges of building cross-platform mobile apps with blockchain.

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Dec 4Live Stream

React Native on Meta Quest: What We Learned About Building for VR

See Meta Quest used as a practical dev setup and watch the team build and test React Native features directly inside a VR workspace.

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Oct 2Live Stream

Building React Native App for Vega OS

React 19.2 brings <Activity> and useEffectEvent, new ideas for React state management arrive, and Vega OS debuts as a React Native-powered Linux OS.

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Jun 13Talk

Building Cross-Platform Federated Modules with React, React Native, and Re.Pack

Discover how Module Federation and Re.Pack enable true cross-platform super apps with React Native. Learn best practices and real-world strategies for dynamic, modular architectures.

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May 21Talk

Building Universal Super Apps With React & React Native

Discover how to build universal Super Apps using React and React Native. Join Mike Grabowski, CTO at Callstack, as he explores dynamic code delivery, native UI rendering, and how RePack bridges the gap with Module Federation.

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Jun 2Webinar

Super App Development Made Easy With Re.Pack

Watch the webinar recording and learn how to build secure, modular React Native super apps with Re.Pack, Module Federation, and remote bundles.

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May 19Talk

Scaling Teams With Federated Super Apps

App developers shape code, but communication with others truly designs products. This talk explores how React and Conway’s law influence this process.

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May 16Talk

Spatial Computing With React

JavaScript powers a React Native journey on Apple Vision Pro, adapting to spatial apps and visionOS quirks for a unique dev experience.

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Sep 7Talk

React Native ❤️ Apple Vision Pro

In this talk, Oskar talks about bringing React Native to Vision Pro and building VR apps with React

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Jul 8Webinar

How to Scale Teams, Product Development, and Release Process With Re.Pack

Join us to learn how Re.Pack helps manage complexity in React Native apps, enables scalable teams, and boosts release processes.

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Oct 2Webinar

Mastering the Big Screen: React Native for TV

Tune in to the recording of a webinar we held with with Amazon to explore the best practices of TV app development in React Native.

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Feb 24Live Stream

Building React Universe Conf App With Replit

Mike and Oskar tried both Repl.it and Bolt.new to code a new conference app, and after burning millions of tokens, they fell back to Cursor.

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Apr 5Talk

Build Universal Web3 Apps With React Native

Learn how to use React Native to build true cross-platform experiences (iOS, Android and Web) for your decentralized apps, from a single codebase.