Expo SDK 55 has officially arrived, bringing a wide range of improvements that make building React Native applications faster, more powerful, and easier to maintain. From new navigation capabilities to improved AI tooling and native UI integrations, this release focuses on improving developer productivity while delivering better app performance.
Whether you’re building modern mobile apps or exploring cross-platform development, understanding the newest Expo capabilities can help you stay ahead.
If you’re interested in expanding your technical skills alongside tools like React Native and analytics platforms, structured Power BI training can also help you strengthen your data and development expertise
React Native 0.83 and React 19 Support
Expo SDK 55 introduces support for React Native 0.83.1 and React 19.2, unlocking access to some of the latest React features.
These include:
- Suspense improvements
- The new use hook
- Activity API
- Better async component handling
The Activity API is particularly important because it allows developers to hide components while preserving their internal state. This improves application performance by avoiding unnecessary re-renders and reloads.
For example, switching between tabs in an app can now preserve component state, creating a faster and smoother user experience.
The New React Native Architecture Is Now Default
Starting with Expo SDK 55, the new React Native architecture becomes mandatory.
This means developers no longer need to manually enable the new architecture flag in their project configuration. The framework now assumes all projects use the modern architecture by default, simplifying project setup and ensuring compatibility with the latest React Native features.
Improved Project Template and UI Experience
Expo has redesigned the default project template to deliver a better out-of-the-box experience.
Key visual improvements include:
- Liquid glass bottom tabs
- Smooth navigation transitions
-
Updated interface animations
- Native material design tabs for Android
These UI improvements help developers create modern mobile interfaces without extensive customization.
Expo Router v7 Enhancements
Expo Router v7 introduces several new capa
bilities that make navigation more flexible and powerful.
Some of the highlights include:
- Native navigation APIs
- Apple-style zoom transitions
- Stack toolbar support
- Improved layout handling
The new router also introduces a Colors API, which allows applications to automatically use system-level color themes on Android.
For example, an app can dynamically adapt its color palette based on the user’s device wallpaper, ensuring seamless integration with the operating system’s design language.
Hermes v1 Performance Improvements
Expo SDK 55 also introduces Hermes v1 support, the JavaScript engine powering React Native.
Hermes v1 includes several improvements:
- Better ES6 support
- Improved async handling
- Faster performance
- Smaller memory footprint
Developers can enable Hermes v1 using the Expo build properties plugin, although additional configuration may be required if the project uses React Native Reanimated.
Smaller Updates with Bytecode Diffing
One of the most impactful changes in Expo SDK 55 is bytecode diffing for Expo Updates.
Previously, when developers pushed an update, the entire JavaScript bundle had to be downloaded by users even if only one line of code changed.
Now, Expo can send only the difference between versions, dramatically reducing update sizes.
This optimization can reduce update downloads to approximately 25% of the original bundle size, allowing apps to deliver faster updates with less bandwidth usage.
Built-In AI Agent Support
Expo SDK 55 introduces first-class support for AI agents and automation tools.
Developers can now use:
- MCP servers
- CLI automation
- AI agent skills
These tools allow AI agents to assist developers with tasks such as:
- Generating UI components
- Running CLI commands
- Creating project scaffolding
- Applying development best practices
This shift toward AI-assisted development is part of Expo’s effort to make mobile development faster and more accessible.
Expo Widgets for Live Activities
Another major addition is the Expo Widgets package, currently in alpha.
This package enables developers to create:
- Home screen widgets
- Live activities
- Interactive UI elements
All of this can be done without writing native code, thanks to Expo UI components and configuration plugins.
This significantly simplifies building native mobile experiences across iOS and Android.
Blur Effects Now Stable on Android
Expo SDK 55 also stabilizes Expo Blur support on Android.
Developers can now create native blur effects by wrapping components with a BlurTargetView, allowing Android applications to replicate modern glass-style UI effects similar to those found in iOS interfaces.
Share Extensions for Mobile Apps
Another highly requested feature coming to Expo is share extension support.
This feature allows users to share content directly into an Expo application from other apps.
Examples include:
- Sharing photos into your app
- Importing files
- Sending links or text content
Expo automatically configures the necessary iOS share extensions and Android intent filters, making integration significantly easier.
Improved Support for Existing Native Apps
Expo SDK 55 also improves support for brownfield applications.
This means developers with existing native iOS or Android projects can gradually integrate Expo features instead of rewriting their entire application.
The new expo-brownfield-target package allows React Native modules to be compiled and integrated into existing native projects.
This makes Expo a viable solution for teams migrating legacy mobile applications.
Final Thoughts
Expo SDK 55 introduces a wide range of improvements that enhance performance, simplify development, and expand the capabilities of React Native applications.
Key highlights include:
- React Native 0.83 and React 19 support
- New navigation capabilities with Expo Router v7
- Bytecode diffing for faster updates
- AI agent integration
- Widgets and live activities support
- Improved UI components and animations
Together, these features push Expo further toward becoming a complete platform for modern mobile development.
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