Build Live Activities with JSX in React Native

Voltra turns React Native JSX into SwiftUI so you can ship custom Live Activities, Dynamic Island layouts without touching Xcode. Author everything in React, keep hot reload, and let the config plugin handle the extension targets.

Features

Ship Native iOS Surfaces: Create Live Activities, Dynamic Island variants, and static widgets directly from React components - no Swift or Xcode required.
Fast Development Workflow: Hooks respect Fast Refresh and both JS and native layers enforce ActivityKit payload budgets.
Production-Ready Push Notifications: Collect ActivityKit push tokens and push-to-start tokens, stream lifecycle updates, and build server-driven refreshes.
Familiar Styling: Use React Native style props and ordered SwiftUI modifiers in one place.
Type-Safe & Developer-Friendly: The Voltra schema, hooks, and examples ship with TypeScript definitions, tests, and docs so AI coding agents stay productive.
Works With Your Setup: Compatible with Expo Dev Client and bare React Native projects. The config plugin automatically wires iOS extension targets for you.

Documentation

The documentation is available at use-voltra.dev. You can also use the following links to jump to specific topics:

Getting started

Note

The library isn't supported in Expo Go. To set it up correctly, you need to use Expo Dev Client.

Install the package:

npm install voltra

Add the config plugin to your app.json:

{
  "expo": {
    "plugins": ["voltra"]
  }
}

Then run npx expo prebuild --clean to generate the iOS extension target.

See the documentation for detailed setup instructions.

Quick example

import { useLiveActivity } from 'voltra/client'
import { Voltra } from 'voltra'

export function OrderTracker({ orderId }: { orderId: string }) {
  const ui = (
    <Voltra.VStack style={{ padding: 16, borderRadius: 14, backgroundColor: '#111827' }}>
      <Voltra.Text style={{ color: 'white', fontSize: 18, fontWeight: '700' }}>Order #{orderId}</Voltra.Text>
      <Voltra.Text style={{ color: '#9CA3AF', marginTop: 6 }}>Driver en route · ETA 12 min</Voltra.Text>
    </Voltra.VStack>
  )

  const { start, update, end } = useLiveActivity(
    { lockScreen: ui },
    {
      activityName: `order-${orderId}`,
      autoStart: true,
      deepLinkUrl: `/orders/${orderId}`,
    }
  )

  return null
}

Platform compatibility

Note: This module is intended for use on iOS devices only.

Authors

voltra is an open source collaboration between Saúl Sharma and Szymon Chmal at Callstack.

If you think it's cool, please star it 🌟. This project will always remain free to use.

Callstack is a group of React and React Native geeks, contact us at hello@callstack.com if you need any help with these or just want to say hi!

Like the project? ⚛️ Join the Callstack team who does amazing stuff for clients and drives React Native Open Source! 🔥