---
title: "From JSX to SwiftUI: How Voltra Powers iOS Live Activities"
description: "See how Voltra lets React teams build iOS Live Activities and Dynamic Island UIs without Swift by translating JSX into SwiftUI under tight native limits."
url: https://www.callstack.com/events/from-jsx-to-swiftui-how-voltra-powers-ios-live-activities
updated: 2026-10-24T08:39:19.779Z
---

# From JSX to SwiftUI: How Voltra Powers iOS Live Activities

See how Voltra lets React teams build iOS Live Activities and Dynamic Island UIs without Swift by translating JSX into SwiftUI under tight native limits.

_Talk · 7/9/2026, 14:50 PM - 15:20 PM [CEST] · Berlin, Germany · Category: React Native_

Organizer: WeAreDevelopers World Congress Europe

Speakers: Szymon Chmal (Software Developer @ Callstack)

[Event page](https://www.wearedevelopers.com/world-congress/agenda/sessions/jsx-to-live-activity-the-story-of-voltra-1100587)

Voltra started with a simple question: can React developers ship iOS Live Activities and Dynamic Island experiences without switching to Swift? In this talk, Szymon Chmal walks through how we answered that question by building a custom React renderer that translates JSX into SwiftUI primitives.

You’ll see how Voltra works under the hood, what it takes to bridge React with native iOS extensions, and how we handled the platform’s toughest constraints, including tight data limits and server-driven UI updates. If you’re curious about pushing React beyond its usual boundaries, this session shows what it takes to ship on a new native surface.