{"id":18944,"date":"2025-02-13T11:05:29","date_gmt":"2025-02-13T10:05:29","guid":{"rendered":"https:\/\/pagepro.co\/blog\/?p=18944"},"modified":"2026-03-05T12:05:53","modified_gmt":"2026-03-05T11:05:53","slug":"migrating-native-app-to-react-native-with-expo","status":"publish","type":"post","link":"https:\/\/pagepro.co\/blog\/migrating-native-app-to-react-native-with-expo\/","title":{"rendered":"Migrating a Native App to React Native? Here\u2019s How Expo Can Help"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"tldr\">TL;DR<\/h2>\n\n\n\n<p>\u2022 React Native allows teams to build cross-platform mobile applications using a shared JavaScript or TypeScript codebase.<\/p>\n\n\n\n<p>\u2022 Migrating an existing native mobile app to React Native can reduce development effort by enabling code reuse across iOS and Android platforms.<\/p>\n\n\n\n<p>\u2022 Expo simplifies this migration by providing tooling, libraries, and infrastructure that speed up development and reduce native configuration complexity.<\/p>\n\n\n\n<p>\u2022 The migration process typically involves gradually replacing native screens with React Native components while maintaining existing functionality.<\/p>\n\n\n\n<p>\u2022 Developers must carefully integrate existing native modules, platform-specific features, and third-party services into the new React Native architecture.<\/p>\n\n\n\n<p>\u2022 A well-planned migration strategy helps teams modernize mobile applications while maintaining performance, stability, and a consistent user experience across platforms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"migrating-native-app-to-react-native-with-expo\">Migrating Native App to React Native with Expo<\/h2>\n\n\n\n<p>Shopify\u2019s migrating native app to React Native led to an 86% code unification across platforms, drastically cutting down development time and <strong>eliminating 1.8 million lines of redundant code.<\/strong> Let\u2019s face it: it\u2019s not just a small improvement\u2014it\u2019s a game-changer for mobile teams looking to scale efficiently.<\/p>\n\n\n\n<p>And Shopify isn\u2019t alone. Tesla, Instagram, and Uber Eats have also embraced React Native, reporting a reduction in development time.<\/p>\n\n\n\n<p>With results like these, it\u2019s clear why more companies are making the switch. React Native <strong>makes mobile development faster, cheaper, and easier<\/strong> to maintain. But there\u2019s one tool that takes this efficiency even further\u2014Expo.<\/p>\n\n\n\n<p>Expo is the preferred way to start a new React Native project, <strong>officially recommended by the React Native team.<\/strong> It&nbsp;cuts development time&nbsp;by eliminating the need to deal with native configurations, offering pre-built APIs, and allowing instant over-the-air (OTA) updates without waiting for App Store approvals.<\/p>\n\n\n\n<p>In this article, we\u2019ll break down:<\/p>\n\n\n\n<ul>\n<li>Why companies migrate from native apps to React Native<\/li>\n\n\n\n<li>How Expo speeds up the migration process<\/li>\n\n\n\n<li>Common challenges and how to solve them with Expo<\/li>\n\n\n\n<li>The long-term performance and maintenance benefits of Expo-powered apps<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"why-migrate-from-native-to-react-native\">Why Migrate from Native to React Native?<\/h2>\n\n\n\n<p>Companies choose to migrate from native development to React Native due to a mix of cost, speed, and scalability benefits:<\/p>\n\n\n\n<ul>\n<li>Faster Development \u2013 A single codebase for both iOS and Android reduces development time.<\/li>\n\n\n\n<li>Lower Maintenance Costs \u2013 One codebase means fewer resources spent on bug fixes and updates.<\/li>\n\n\n\n<li>Wider Developer Availability \u2013 JavaScript and TypeScript are more common than Swift\/Kotlin, making hiring easier.<\/li>\n\n\n\n<li>Code Reusability \u2013 With React Native, large parts of the web code can be shared between mobile and desktop.<\/li>\n\n\n\n<li>Strong Ecosystem \u2013 Companies like Facebook, Shopify, and Microsoft actively support and improve React Native.<\/li>\n<\/ul>\n\n\n\n<p>We have a full article on migration from native to React Native, you can check it here: <a href=\"https:\/\/pagepro.co\/blog\/migration-of-a-native-app-to-react-native\/\">Migration of a Native app to React Native<\/a><\/p>\n\n\n<div class=\"c-newsletter-sendgrid-wrapper js-newsletter-sendgrid-wrapper ga-filedownload-viewed\">\n    <div class=\"c-newsletter-sendgrid\">\n                    <p class=\"c-newsletter-sendgrid__title\">\n                Get the list of Over 100 React Native App Examples            <\/p>\n        \n         \n            <p class=\"c-newsletter-sendgrid__description\">\n                Discover wide adoption of React Native across industries and app categories!             <\/p>\n        \n        <form action=\"\" class=\"c-newsletter-sendgrid__form f-form js-newsletter-sendgrid\" data-key=\"e3f9a26a-2d4a-4469-a83c-e3ae691a411f\">\n            <div class=\"c-newsletter-sendgrid__form-mail\">\n                <label class=\"c-label\" for=\"newsletter_email\">Company E-mail address<\/label>\n                <input class=\"c-input js-newsletter-sendgrid-email\" type=\"email\" id=\"newsletter_email\" required>\n                <input class=\"c-newsletter-sendgrid__button ga-cta-filedownload\" type=\"submit\" value=\"Download Now\">\n            <\/div>\n            <div class=\"c-newsletter-sendgrid__form-consent\">\n                                                        <input class=\"c-checkbox js-newsletter-consent\" type=\"checkbox\" name=\"newsletter_consent\" id=\"newsletter_consent_1\" required>\n                    <label class=\"c-label\" for=\"newsletter_consent_1\">By providing your e-mail address, you agree to our Privacy Policy. We will not send you any spam \u2013 only link for downloading the e-book and probably some more useful resources in the future.<\/label>\n                            <\/div>\n        <\/form>\n\n        <div class=\"c-newsletter-sendgrid__cover-container\">\n                            <img decoding=\"async\" class=\"c-newsletter-sendgrid__cover-1\" src=\"https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2024\/01\/113-rn-apps.png\" alt=\"A bold, geometric cover design featuring red and black diagonal shapes and white text that reads 113 REACT NATIVE APPS. Showcasing the React Native Tech Stack, the pagepro logo appears in the top left corner.\" >\n                                                    <span class=\"c-newsletter-sendgrid__type\">PDF<\/span>\n                    <\/div>\n\n        <div class=\"c-newsletter-sendgrid__popup-wrapper js-newsletter-sendgrid-popup is-hidden\">\n            <div class=\"c-newsletter-sendgrid__popup\">\n                <div class=\"c-newsletter-sendgrid__popup-icon\">\n                    <svg width=\"140\" height=\"140\" viewBox=\"0 0 140 140\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                    <g clip-path=\"url(#clip0_6621_2135)\">\n                    <path d=\"M65.625 100.625C65.625 109.908 69.3125 118.81 75.8763 125.374C82.44 131.938 91.3424 135.625 100.625 135.625C109.908 135.625 118.81 131.938 125.374 125.374C131.938 118.81 135.625 109.908 135.625 100.625C135.625 91.3424 131.938 82.44 125.374 75.8763C118.81 69.3125 109.908 65.625 100.625 65.625C91.3424 65.625 82.44 69.3125 75.8763 75.8763C69.3125 82.44 65.625 91.3424 65.625 100.625Z\" stroke=\"#0A2B3D\" stroke-width=\"8.75\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n                    <path d=\"M116.223 90.4517L99.2774 113.044C98.9005 113.545 98.4206 113.959 97.8701 114.259C97.3196 114.558 96.7113 114.737 96.0862 114.781C95.461 114.826 94.8335 114.736 94.246 114.518C93.6584 114.3 93.1244 113.959 92.6799 113.517L83.9299 104.767\" stroke=\"#0A2B3D\" stroke-width=\"8.75\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n                    <path d=\"M48.125 91.875H13.125C10.8044 91.875 8.57876 90.9531 6.93782 89.3122C5.29687 87.6712 4.375 85.4456 4.375 83.125V13.125C4.375 10.8044 5.29687 8.57876 6.93782 6.93782C8.57876 5.29687 10.8044 4.375 13.125 4.375H118.125C120.446 4.375 122.671 5.29687 124.312 6.93782C125.953 8.57876 126.875 10.8044 126.875 13.125V52.5\" stroke=\"#0A2B3D\" stroke-width=\"8.75\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n                    <path d=\"M124.898 7.5835L77.3909 44.1235C74.0176 46.7185 69.881 48.1255 65.625 48.1255C61.3691 48.1255 57.2325 46.7185 53.8592 44.1235L6.35254 7.5835\" stroke=\"#0A2B3D\" stroke-width=\"8.75\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n                    <\/g>\n                    <defs>\n                    <clipPath id=\"clip0_6621_2135\">\n                    <rect width=\"140\" height=\"140\" fill=\"white\"\/>\n                    <\/clipPath>\n                    <\/defs>\n                    <\/svg>\n                <\/div>\n                                    <p class=\"c-newsletter-sendgrid__popup-text\">\n                        Check your inbox for free materials                    <\/p>\n                                <div class=\"c-newsletter-sendgrid__popup-action\">\n                    <button class=\"c-newsletter-sendgrid__button c-newsletter-sendgrid__button--full-width js-newsletter-sendgrid-popup-close\">Close<\/button>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"5-key-expo-features-improving-the-migration-from-native-to-react-native\">5 Key Expo Features Improving the Migration From Native to React Native&nbsp;<\/h2>\n\n\n\n<p>Migrating from a fully native app to React Native is a strategic decision, the one that comes with technical challenges. Legacy dependencies, platform-specific code, and maintaining feature parity across iOS and Android can slow the process down.<\/p>\n\n\n\n<p>Expo <strong>eliminates the need for direct native configuration in most cases<\/strong> by providing a structured workflow, pre-built APIs, and a cloud-based build system. Instead of <strong>managing Xcode project settings, Android Gradle files, or manual package linking,<\/strong> Expo\u2019s <strong>managed workflow<\/strong> ensures seamless compatibility across platforms. It automates dependency management, builds optimizations, and runtime compatibility, allowing teams to <strong>focus on delivering features instead of dealing with platform-specific issues.<\/strong><\/p>\n\n\n\n<p>Here are five key Expo features that significantly improve the migration process from native to React Native.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-pre-built-apis-for-native-capabilities-push-camera-authentication-etc\"><span class=\"underline-accent\">1. Pre-Built APIs for Native Capabilities (Push, Camera, Authentication, etc.)<\/span><\/h3>\n\n\n\n<ul>\n<li><strong>Push notifications<\/strong> (<code>expo-notifications<\/code>) \u2013 Unified API for handling push messages on both iOS and Android.<\/li>\n\n\n\n<li><strong>Camera and media access<\/strong> (<code>expo-camera<\/code>, <code>expo-image-picker<\/code>) \u2013 Built-in components for working with photos and videos.<\/li>\n\n\n\n<li><strong>Secure authentication<\/strong> (<code>expo-auth-session<\/code>) \u2013 Simplifies OAuth flows for Google, Apple Sign-In, and others.<\/li>\n\n\n\n<li><strong>Haptics, sensors, geolocation, and background tasks<\/strong> \u2013 APIs for device interactions without needing native modules.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"how-it-improves-migration-from-a-native-app\">How It Improves Migration from a Native App<\/h4>\n\n\n\n<p>Migrating a <strong>native iOS\/Android app to React Native<\/strong> means adapting platform-specific features to work cross-platform. <strong>Push notifications, camera access, and authentication are often deeply integrated into native apps<\/strong>, requiring different configurations for iOS and Android.<\/p>\n\n\n\n<ul>\n<li><strong>Push Notifications<\/strong> \u2013 Native apps rely on <strong>APNs (iOS) and FCM (Android)<\/strong>, which require separate implementations. Expo\u2019s <code>expo-notifications<\/code> abstracts these complexities, providing a unified way to send and handle push messages.<\/li>\n\n\n\n<li><strong>Camera &amp; Media<\/strong> \u2013 Instead of writing Swift\/Java to access device cameras, Expo provides <code>expo-camera<\/code> and <code>expo-image-picker<\/code>, reducing the need for custom native code.<\/li>\n\n\n\n<li><strong>Authentication<\/strong> \u2013 Migrating sign-in flows can be challenging due to <strong>OAuth platform differences<\/strong>. <code>expo-auth-session<\/code> standardizes authentication across providers like Google and Apple.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-expo-router-file-based-navigation-for-react-native\"><span class=\"underline-accent\">2. Expo Router: File-Based Navigation for React Native<\/span><\/h3>\n\n\n\n<p>Expo Router brings file-based routing to React Native, similar to Next.js for web applications. Instead of configuring navigation manually with react-navigation, developers can structure routes directly in the filesystem.<\/p>\n\n\n\n<p>Example:<\/p>\n\n\n\n<pre class=\"wp-block-code-mind-code c-code\"><code class=\"typescript\">cpp\n\nCopyEdit\n\napp\/\n\n\u00a0\u00a0\u251c\u2500\u2500 index.tsx\u00a0 \/\/ Home screen\n\n\u00a0\u00a0\u251c\u2500\u2500 about.tsx\u00a0 \/\/ About page\n\n\u00a0\u00a0\u251c\u2500\u2500 profile\/\n\n\u00a0\u00a0\u2502 \u00a0 \u251c\u2500\u2500 index.tsx\u00a0 \/\/ User profile\n\n\u00a0\u00a0\u2502 \u00a0 \u251c\u2500\u2500 settings.tsx\u00a0 \/\/ Profile settings<\/code><\/pre>\n\n\n\n<p>When transitioning from a <strong>native iOS or Android app<\/strong>, navigation logic is often <strong>deeply tied to platform-specific navigation stacks<\/strong>:<\/p>\n\n\n\n<ul>\n<li><strong>iOS (<code>UINavigationController<\/code>)<\/strong> relies on a push\/pop stack structure, making navigation hierarchical and tightly coupled to Apple\u2019s APIs.<\/li>\n\n\n\n<li><strong>Android (<code>Fragments<\/code> and <code>Activities<\/code>)<\/strong> depends on a combination of fragment transactions and activity lifecycle management, which behaves differently from iOS.<\/li>\n<\/ul>\n\n\n\n<p>Migrating to React Native requires <strong>unifying these platform-specific navigation paradigms into a single cross-platform system<\/strong>, which can introduce complexity.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"720\" height=\"404\" src=\"https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/image.png\" alt=\"Expo Router \" class=\"wp-image-18947\" srcset=\"https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/image.png 720w, https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/image-300x168.png 300w, https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/image-500x281.png 500w, https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/image-324x182.png 324w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">Source: <a href=\"https:\/\/blog.expo.dev\/expo-router-v3-beta-is-now-available-eab52baf1e3e\">Expo Blog<\/a><\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"how-expo-router-helps\">How Expo Router Helps<\/h4>\n\n\n\n<ul>\n<li><strong>Simplifies navigation setup<\/strong> by replacing <strong>manual stack configurations<\/strong> with a file-based structure that automatically maps screens to routes.<\/li>\n\n\n\n<li><strong>Ensures consistency across iOS and Android<\/strong> without requiring platform-specific navigation logic or behavioral adjustments.<\/li>\n\n\n\n<li><strong>Improves deep linking and dynamic routing<\/strong>, automatically mapping URLs to screens without requiring modifications to <code>Info.plist<\/code> (iOS) or <code>AndroidManifest.xml<\/code> (Android).<\/li>\n<\/ul>\n\n\n\n<p>For teams migrating from native mobile apps, Expo Router <strong>removes the friction of managing navigation inconsistencies<\/strong>, making the transition smoother and more maintainable.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-over-the-air-ota-updates-for-instant-deployment\"><span class=\"underline-accent\">3. Over-the-Air (OTA) Updates for Instant Deployment<\/span><\/h3>\n\n\n\n<p>With Expo\u2019s OTA updates (expo-updates), teams can push new app versions without resubmitting to the App Store or Google Play.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"how-it-improves-migration\">How It Improves Migration<\/h4>\n\n\n\n<p>One of the biggest bottlenecks in mobile app migration is dealing with App Store\/Play Store approvals. Every time you fix a bug or roll out a small UI improvement, it requires manual app resubmissions and waiting times (which can take days).<\/p>\n\n\n\n<p>Expo\u2019s OTA updates:<\/p>\n\n\n\n<ul>\n<li><strong>Allows instant fixes and updates<\/strong> \u2013 No need to wait for <strong>App Store\/Play Store review cycles<\/strong>.<\/li>\n\n\n\n<li><strong>Reduces risk when rolling out migrated features<\/strong> \u2013 Teams can <strong>gradually transition parts of the app<\/strong> and push improvements incrementally.<\/li>\n\n\n\n<li><strong>Ensures a seamless transition between native and React Native components<\/strong> \u2013 Legacy native features can <strong>coexist<\/strong> with new React Native implementations, allowing for <strong>progressive migration<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>Instead of being <strong>locked into slow deployment cycles<\/strong>, Expo\u2019s OTA updates allow development teams to <strong>move faster<\/strong> while ensuring a <strong>smooth migration experience<\/strong>.<\/p>\n\n\n\n<p>Read more about: <a href=\"https:\/\/pagepro.co\/blog\/ota-updates-with-expo\/\">Over the Air Updates<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-managed-workflow-no-need-for-native-code-to-start\"><span class=\"underline-accent\">4. Managed Workflow: No Need for Native Code to Start<\/span><\/h3>\n\n\n\n<p>The Expo Managed Workflow allows teams to build React Native apps without manually configuring native modules (e.g., Xcode, Android Studio, Gradle).<\/p>\n\n\n\n<p>It includes:<\/p>\n\n\n\n<ul>\n<li>Expo Go \u2013 A lightweight client to preview apps instantly.<\/li>\n\n\n\n<li>Pre-configured Metro bundler \u2013 No need to set up native build tools.<\/li>\n\n\n\n<li>Cloud-based builds (EAS Build) \u2013 Run builds on Expo\u2019s servers without needing a local macOS machine.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"how-it-improves-migration\">How It Improves Migration<\/h4>\n\n\n\n<p>When migrating from a fully native app, developers often face the challenge of setting up React Native environments alongside existing native code.<\/p>\n\n\n\n<p>Expo Managed Workflow:<\/p>\n\n\n\n<ul>\n<li><strong>Eliminates the need for immediate native configurations<\/strong> \u2013 Teams can <strong>start migrating features incrementally<\/strong> without needing to install Xcode or Android Studio.<\/li>\n\n\n\n<li><strong>Reduces dependency management overhead<\/strong> \u2013 No need to manually link native modules or configure Gradle\/Xcode projects.<\/li>\n\n\n\n<li><strong>Allows teams to focus on UI and business logic first<\/strong> \u2013 Native complexities can be <strong>handled later<\/strong> while migrating in phases.<\/li>\n<\/ul>\n\n\n\n<p>This means <strong>small teams can begin migrating a native app to React Native without disrupting their existing workflows<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"5-expo-application-services-eas-optimized-builds-ci-cd\"><span class=\"underline-accent\">5. Expo Application Services (EAS): Optimized Builds &amp; CI\/CD<\/span><\/h3>\n\n\n\n<p>EAS Build &amp; Submit automates app compilation and deployment, handling:<\/p>\n\n\n\n<ul>\n<li>Cloud-based app builds (no need for macOS machines for iOS builds).<\/li>\n\n\n\n<li>Code signing, provisioning, and store submission.<\/li>\n\n\n\n<li>Optimized binaries for faster app performance.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"721\" src=\"https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/Screenshot-2025-02-13-at-10.49.24-1024x721.png\" alt=\"Expo EAS Build\" class=\"wp-image-18948\" srcset=\"https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/Screenshot-2025-02-13-at-10.49.24-1024x721.png 1024w, https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/Screenshot-2025-02-13-at-10.49.24-300x211.png 300w, https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/Screenshot-2025-02-13-at-10.49.24-768x541.png 768w, https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/Screenshot-2025-02-13-at-10.49.24-474x334.png 474w, https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/Screenshot-2025-02-13-at-10.49.24-324x228.png 324w, https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/Screenshot-2025-02-13-at-10.49.24.png 1130w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"how-it-improves-migration\">How It Improves Migration<\/h4>\n\n\n\n<p>For teams migrating an existing native app, one of the most <strong>time-consuming parts of migration<\/strong> is <strong>setting up CI\/CD pipelines<\/strong> for React Native builds.<\/p>\n\n\n\n<p>Expo\u2019s EAS removes this friction by:<\/p>\n\n\n\n<ul>\n<li><strong>Handles app signing and certificates automatically<\/strong> \u2013 Reduces manual provisioning profile issues that slow down migration.<\/li>\n\n\n\n<li><strong>Optimizes builds for performance<\/strong> \u2013 Ensures migrated React Native apps are <strong>not bloated <\/strong>compared to their native counterparts.<\/li>\n\n\n\n<li><strong>Eliminates the need for Mac infrastructure<\/strong> \u2013 iOS builds are handled entirely in the cloud, removing the dependency on local macOS machines.<\/li>\n<\/ul>\n\n\n\n<p>By offloading build complexities to Expo\u2019s infrastructure, teams can migrate and deploy React Native features faster, without the DevOps overhead.<\/p>\n\n\n\n<div class=\"wp-block-code-mind-cta c-cta-block\" style=\"background-color:#00141F;color:#FFFFFF\"><div class=\"c-cta-block__content\"><p class=\"c-cta-block__title\">Want to migrate your app? <\/p><div class=\"c-cta-block__action\"><a href=\"https:\/\/pagepro.co\/services\/expo-development\" class=\"c-cta-block__button ga-cta ga-cta-consultation theme-bg-3\">Use Our Expertise<\/a><\/div><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"common-challenges-in-native-app-rebuilds-and-how-to-overcome-them-with-expo\">Common Challenges in native app rebuilds and How to Overcome Them with Expo<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-handling-platform-specific-code-and-dependencies\"><span class=\"underline-accent\">1. Handling Platform-Specific Code and Dependencies<\/span><\/h3>\n\n\n\n<p>Migrating from a native app to React Native comes with&nbsp;technical hurdles, but Expo offers solutions to smooth the transition.<\/p>\n\n\n\n<p><strong>Example: <\/strong><\/p>\n\n\n\n<p>A fitness-tracking app relies on custom Bluetooth logic to sync with external heart rate monitors and direct camera frame access for real-time motion tracking. These features are <strong>deeply integrated with platform-specific SDKs<\/strong> like Core Bluetooth (iOS) and Android\u2019s Bluetooth stack, making it difficult to replicate them in a cross-platform environment. Since React Native runs in a JavaScript bridge, developers often worry about whether Expo can support such <strong>low-level interactions<\/strong> <strong>without sacrificing performance or requiring a complete rewrite.<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"how-expo-helps\">How Expo Helps<\/h4>\n\n\n\n<ul>\n<li>Expo provides <strong>pre-built APIs<\/strong> (<code>expo-bluetooth<\/code>, <code>expo-camera<\/code>, <code>expo-sensors<\/code>) that handle many common hardware interactions <strong>without requiring native code modifications<\/strong>.<\/li>\n\n\n\n<li>For advanced use cases, the <strong>bare workflow<\/strong> allows direct access to native modules while still leveraging Expo\u2019s build system.<\/li>\n\n\n\n<li><strong>Custom Development Clients (<code>expo-dev-client<\/code>)<\/strong> enable teams to extend Expo\u2019s managed workflow by adding their own native modules <strong>without fully ejecting<\/strong>, maintaining compatibility with Expo\u2019s ecosystem while integrating necessary platform-specific features.<\/li>\n<\/ul>\n\n\n\n<p>By <strong>starting in managed workflow and selectively extending to native where necessary<\/strong>, teams can preserve Expo\u2019s benefits while ensuring full device compatibility.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-dealing-with-missing-native-functionalities-in-expos-managed-workflow\"><span class=\"underline-accent\">2. Dealing with Missing Native Functionalities in Expo\u2019s Managed Workflow<\/span><\/h3>\n\n\n\n<p><strong>Example: <\/strong><\/p>\n\n\n\n<p>A subscription-based video streaming app depends on <strong>in-app purchases (IAP) for subscriptions<\/strong> and <strong>low-level video processing using AVFoundation (iOS) or ExoPlayer (Android)<\/strong>. These features are deeply tied to native APIs, and developers often face issues when transitioning to React Native because <strong>Expo\u2019s managed workflow does not support all system-level integrations out of the box<\/strong>.<\/p>\n\n\n\n<p>Without direct access to these native APIs, teams might worry about <strong>whether they need to fully eject from Expo<\/strong> just to integrate key monetization and media processing features.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"how-expo-helps\">How Expo Helps<\/h4>\n\n\n\n<ul>\n<li><strong>For in-app purchases<\/strong>, Expo\u2019s bare workflow allows direct integration with StoreKit (iOS) and Google Play Billing (Android) while still<strong> benefiting from Expo\u2019s build and OTA update capabilities<\/strong>.<\/li>\n\n\n\n<li><strong>For media-heavy apps<\/strong>, the <code>expo-av<\/code> package offers built-in audio\/video support, reducing the need for full native rewrites. If advanced processing is required, <strong>teams can add native video libraries within the bare workflow<\/strong>.<\/li>\n\n\n\n<li><strong>Custom Development Clients (<code>expo-dev-client<\/code>)<\/strong> provide a middle ground\u2014allowing teams to build a native module just for the missing functionality while<strong> keeping the rest of the app inside Expo\u2019s managed workflow<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-avoiding-performance-pitfalls-when-rewriting-key-components\"><span class=\"underline-accent\">3. Avoiding Performance Pitfalls When Rewriting Key Components<\/span><\/h3>\n\n\n\n<p><strong>Example: <\/strong><\/p>\n\n\n\n<p>A finance or trading app needs to <strong>render large amounts of real-time data<\/strong> with complex animations and interactive charts. In a fully native app, developers would use <strong>UIKit (iOS) or Jetpack Compose (Android) to optimize UI rendering<\/strong>, but moving to React Native introduces concerns about whether JavaScript-based rendering can <strong>match native performance<\/strong>.<\/p>\n\n\n\n<p>React Native\u2019s default rendering model relies on <strong>JavaScript and React\u2019s reconciliation process<\/strong>, which can introduce <strong>frame drops, janky animations, and slow list rendering<\/strong>, especially for high-performance applications.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"how-expo-helps\">How Expo Helps<\/h4>\n\n\n\n<ul>\n<li><strong>For complex animations<\/strong>, <code>react-native-reanimated<\/code> (fully supported within Expo) allows teams to <strong>offload animations to the native thread<\/strong>, avoiding JavaScript performance bottlenecks.<\/li>\n\n\n\n<li><strong>For handling large data sets<\/strong>, <code>FlashList<\/code> (developed by the React Native team) provides a <strong>high-performance, virtualized list solution<\/strong> optimized for React Native, significantly improving scroll performance.<\/li>\n\n\n\n<li><strong>For real-time updates<\/strong>, Expo\u2019s WebSocket and background task APIs allow apps to process background data <strong>without slowing down the UI thread<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>By <strong>using Expo\u2019s optimized libraries<\/strong> and <strong>minimizing JavaScript thread workload<\/strong>, teams can ensure native-like performance while keeping development fast and scalable.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-ensuring-stability-when-migrating-in-phases\"><span class=\"underline-accent\">4. Ensuring Stability When Migrating in Phases<\/span><\/h3>\n\n\n\n<p>Example: <\/p>\n\n\n\n<p>A banking app migrating to React Native needs to <strong>release new React Native-based screens while keeping core native functionalities intact<\/strong>. However, managing a <strong>hybrid architecture<\/strong>, where part of the app is still native while new features are built in React Native, can introduce <strong>stability issues<\/strong> if not handled properly.<\/p>\n\n\n\n<p>Teams may struggle with <strong>embedding React Native inside an existing native app<\/strong>, ensuring a smooth transition without breaking core functionalities, and maintaining stability across releases.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"how-expo-helps\">How Expo Helps<\/h4>\n\n\n\n<ul>\n<li><strong>Incremental Migration<\/strong> \u2013 Expo allows teams to <strong>start with a managed workflow<\/strong> and gradually introduce React Native screens into an existing native app <strong>without fully replacing it overnight<\/strong>.<\/li>\n\n\n\n<li><strong>Bridging Between Native and React Native<\/strong> \u2013 Using Expo\u2019s <strong>bare workflow<\/strong>, teams can embed React Native inside an existing iOS\/Android app, gradually migrating screens <strong>without disrupting the entire application<\/strong>.<\/li>\n\n\n\n<li><strong>OTA Updates for Stability<\/strong> \u2013 Expo\u2019s OTA updates (<code>expo-updates<\/code>) allow teams to <strong>push fixes and gradual feature rollouts<\/strong> without waiting for App Store\/Google Play approvals, <strong>minimizing downtime and migration risks<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>By migrating in controlled phases, teams can <strong>transition to React Native while keeping legacy native components stable and functional<\/strong>.<\/p>\n\n\n\n<div class=\"c-case-study-block js-sticky-wide\">\n    <div class=\"c-case-study-block__content\">\n        <div class=\"c-case-study-block__text\">\n                            <p class=\"c-case-study-block__subtitle\">CASE STUDY<\/p>\n                                        <p class=\"c-case-study-block__title\">One of the biggest UK shopping App migrating from Native to React Native<\/p>\n                                        <a href=\"https:\/\/pagepro.co\/case-studies\/migration-to-react-native\" class=\"c-case-study-block__button\" target=\"_blank\">\n                    READ CASE STUDY                <\/a>\n                    <\/div>\n                    <figure class=\"c-case-study-block__media\">\n                <img decoding=\"async\" class=\"c-case-study-block__image\" src=\"https:\/\/pagepro.co\/blog\/wp-content\/uploads\/2025\/02\/Screenshot-2025-02-13-at-10.36.07.png\" alt=\"A screenshot of a mobile phone, showcasing the process of migrating a native app to React Native with Expo.\" \/>\n            <\/figure>\n            <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"performance-and-maintenance-benefits-post-migrating-native-app-to-react-native-with-expo\">Performance and Maintenance Benefits Post-Migrating Native App to React Native with Expo<\/h2>\n\n\n\n<p>Migrating to React Native using Expo not only simplifies development but also improves app maintenance and performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-performance-benefits-of-react-native-with-expo\"><span class=\"underline-accent\">1. Performance Benefits of React Native with Expo<\/span><\/h3>\n\n\n\n<ul>\n<li>Efficient Rendering \u2013 React Native\u2019s UI updates are handled efficiently with the React reconciler.<\/li>\n\n\n\n<li>Optimized Lists and UI Components \u2013 Expo supports FlatList and FlashList for smooth scrolling on large data sets.<\/li>\n\n\n\n<li>Reduced App Size \u2013 Expo\u2019s bundling ensures optimal app size without unnecessary dependencies.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-maintenance-benefits\"><span class=\"underline-accent\">2. Maintenance Benefits<\/span><\/h3>\n\n\n\n<ul>\n<li>Single Codebase = Easier Updates \u2013 One update applies to both iOS and Android.<\/li>\n\n\n\n<li>Expo\u2019s OTA Updates \u2013 Deploy fixes and updates instantly without waiting for App Store approval.<\/li>\n\n\n\n<li>Lower Developer Overhead \u2013 A React Native team can maintain multiple platforms without needing separate iOS and Android specialists.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"is-expo-the-right-choice-for-your-migration\">Is Expo the Right Choice for Your Migration?<\/h2>\n\n\n\n<p>Migrating from native to React Native is a big decision, <strong>but Expo provides a powerful set of tools<\/strong> that can significantly speed up the transition, reduce complexity, and improve app maintenance.<\/p>\n\n\n\n<p>If your app doesn\u2019t require extensive native modules, <strong>Expo\u2019s managed workflow is an ideal choice for a fast and smooth migration.<\/strong> For teams needing more flexibility, the bare workflow still allows you to benefit from Expo\u2019s build tools while maintaining full native access.<\/p>\n\n\n\n<p>As React Native adoption continues to grow, Expo is becoming the go-to solution for teams looking to streamline their mobile development and migration processes.<\/p>\n\n\n\n<div class=\"wp-block-code-mind-cta c-cta-block\" style=\"background-color:#00141F;color:#FFFFFF\"><div class=\"c-cta-block__content\"><p class=\"c-cta-block__title\">Need Help in Migrating Your Native App? <\/p><div class=\"c-cta-block__action\"><a href=\"https:\/\/pagepro.co\/contact\" class=\"c-cta-block__button ga-cta ga-cta-consultation theme-bg-3\">Use our expertise<\/a><\/div><\/div><\/div>\n\n\n\n<p>Sources<\/p>\n\n\n\n<ul>\n<li><a href=\"https:\/\/docs.expo.dev\/versions\/latest\/sdk\/auth-session\/\">https:\/\/docs.expo.dev\/versions\/latest\/sdk\/auth-session\/<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/shopify.engineering\/migrating-our-largest-mobile-app-to-react-native\">https:\/\/shopify.engineering\/migrating-our-largest-mobile-app-to-react-native<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/pagepro.co\/blog\/expo-apps\/\">40 best examples of Expo Apps<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Learn about 5 key Expo features that speed up migration from native app to React Native.<\/p>\n","protected":false},"author":2,"featured_media":18956,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[672,94],"tags":[503,633],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Migrating a Native App to React Native? 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